Government of Western Australia Department of Mines and Petroleum Petroleum Division Summary of Petroleum Prospectivity: Canning Basin CANNING BASIN WESTERN AUSTRALIA PERTH February 2014 Contents Petroleum geology of the Canning Basin Introduction............................................................................................ 3 Location and size of the Canning Basin................................................ 3 Tectonic elements.................................................................................. 3 Basin subdivisions................................................................................. 4 Stratigraphy........................................................................................... 6 Exploration history................................................................................. 7 Production............................................................................................10 Petroleum systems...............................................................................10 Plays.....................................................................................................16 Other aspects of the Canning Basin Infrastructure and markets...................................................................19 Land access, climate, and land use.....................................................19 Selected references.................................................................................. 21 Summary of Petroleum Prospectivity: Canning Basin Petroleum geology of the Canning Basin Introduction The onshore Canning Basin is a large, intracratonic, predominantly Paleozoic basin that ranges in age from Ordovician to Cretaceous. It is significantly under explored for hydrocarbon resources, with relatively minor oil and gas production, although widespread shows at many stratigraphic levels and in different geological settings show that there are four active petroleum systems. Despite these positive indicators, the Canning Basin may be the least explored Paleozoic basin in the world. Further exploration is warranted given that: • The Canning Basin has only four wells/10 000 km2, compared with the Paleozoic basins of North America which average 500 wells/10 000 km2. • Only a small number of valid structural tests exist in the basin. • There are more than 130 giant and supergiant oilfields and gasfields with Paleozoic sources and reservoirs that are similar to the Canning Basin, including basins in North America, North Africa, and the North Caspian Basin of Kazakhstan and Russia. • The US Energy Information Agency reported in 2013 that the Canning Basin has the largest shale gas potential in Australia, and in fact the eighth largest in the world; they estimated it has in excess of 225 TCF of recoverable shale gas based on the Goldwyer Formation play alone. • Further exploration could be highly successful based on the presence of five discovered oilfields, new gas discoveries, widespread and numerous petroleum shows, a huge shale gas potential, and low well density. • There are established pathways to markets: Oil is being trucked to the Kwinana oil refinery in the Perth metropolitan area and, in the past, it was also exported from the port of Broome. A gas pipeline runs along the southern margin of the Canning Basin to Telfer, the site of one of Australia’s largest gold mines. Location and size of the Canning Basin • Central northern Western Australia, approximately 1500 km northeast of Perth • The largest sedimentary basin in Western Australia • Onshore area of about 530 000 km2 and offshore area of about 110 000 km2. Tectonic elements The Canning Basin initially developed in the Early Paleozoic as an intracratonic sag between the Precambrian Pilbara and Kimberley Cratons. • Significant tectonic events affected the basin in the: - Early Ordovician (extension and rapid subsidence) - Early Devonian (compression and erosion) - Late Devonian (extension and subsidence) - Middle and late Carboniferous to Permian (compression then subsidence) - Early Jurassic (transpressional uplift and erosion). • The southern Canning Basin is less intensely deformed than the northern part, which underwent major fault block movements. 3 Summary of Petroleum Prospectivity: Canning Basin Basin subdivisions The Canning Basin is subdivided into a series of troughs, sub-basins, platforms, shelves, and terraces, bounded by northwesterly–southeasterly trending, syndepositional fault systems (Fig. 1). 120° 122° 126° 124° 128° 16° Pend er Terra c e KIMBERLEY BASIN Lloyd 1 Point Torment 1 Boundary 1 Point Torment 1 Terrace 1 Deepening West Terrace 1 Janpam North 1 West Kora 1 Meda 1 Blina 1 Kora 1 Sundown 1 Boronia 1 Yulleroo 1 Crimson Lake 1 Jurgu rra Ellendale 1 Ungani 1 Ellendale 1 Le Ter rac nn Valhalla 1 e Mowla Terrace Fit z 18° ar d roy St George Range 1 Pictor 1 me Tro Pictor 2 Edgar Range 1 ug Looma 1 h Great Sandy 1 Pla Dodonea 1 tfo Leo 1 rm Br oo Sh elf ne s tty e Pla ll tfo elf Sh Ki rm ds on Su b- Ba 22° sin elf 600 km Rya n Sh Derby Port Hedland Ta ble to p OFFICER BASIN Kalgoorlie PERTH 20° c rra Te nd e lgo te ke An sla ra c Ba Cr os Te r ry go in re as G b-b Su e c ra rm Arch Billiluna Shelf Be r Te Munro PILBARA CRATON Arch Mirbelia 1 tfo Pla Su Wil b- lara ba sin Jo al ire w rb Ba Cudalgarra 1 W all Sh el f GUNBARREL BASIN (over Officer Basin) ARG203b 24° Warri Arch 04/02/14 25 km Canning Basin (offshore/onshore) Oil producer Other tectonic elements Excellent/good oil show Gas producer Excellent/good gas show Figure 1. Tectonic elements of the Canning Basin and wells with oil and gas occurrences 4 Summary of Petroleum Prospectivity: Canning Basin The basin subdivisions are based on present-day structural elements. However, growth faulting initially developed some of these, and troughs developed and were active at different times during the basin’s history. Two major northwest-trending troughs are separated by a mid-basin arch and bounded by marginal shelves. • The northern depocentre is divided into the Fitzroy Trough and the Gregory Sub-basin (Fig. 2), which are estimated to contain up to 15 km of predominantly Paleozoic rocks. The Lennard Shelf, to the north of the Fitzroy Trough, is the most intensively explored part of the basin and contains commercial oilfields (Fig. 1). • The southern trough includes the Kidson and Willara Sub-basins, in which there are thinner sedimentary successions (4–5 km thick) of predominantly Ordovician to Silurian and Permian rocks, with extensive Mesozoic cover. The Kidson Sub-basin has thick salt seals, but hydrocarbon potential has not been properly tested, with very little exploration to date. • The central arch is divided into the Broome and Crossland Platforms, and structural terraces step down from it into both depocentres (Fig. 2). The Broome Platform and its terraces have a thinner sedimentary section, but have had many good oil shows, and oil and gas flows. • The southwestern Canning Basin is defined by relatively thin successions on the Anketell Shelf, and a complex series of horsts and grabens: the Wallal Embayment, Wallal Platform, and Samphire Graben. NORTH-EAST VIEW N Kimberley Block Shelf Lennard Gregory in Sub-bas Fitzroy in Sub-bas rm d Platfo n Crossla Platform Broome Kidson Willara in Sub-bas in Sub-bas Pilbara Craton RB74 04/02/14 Figure 2. Image of interpreted depth-to-basement for the Canning Basin (adapted from Fig. 4–16c, SRK Consulting Pty Ltd, 1998) 5 Summary of Petroleum Prospectivity: Canning Basin Stratigraphy 66 Petroleum system Tectonic events Seal North South Reservoir Epoch Source Stratigraphy Period Age (Ma) The onshore Canning Basin succession consists of Ordovician to Cretaceous sedimentary rocks overlying Proterozoic–Archean basement, but it is predominantly Paleozoic in age (Fig. 3). Legend Lower Dominant lithology Sandstone Bejah Claystone Anketell Fm. Frezier Parda Melligo Samuel Ss. Fm. Ss. Fm. Callawa/Cronin Fms Broome Sandstone Breakup Unconformity 145 Jarlemai Fm. Alexander Fm. Barbwire Ss. Wallal Ss. Jurassic Upper Middle Gas well Gas show Oil show Oil and gas show Evaporite Basement Secondary lithology Sandstone Gp Group Fm. Formation Ss. Sandstone Unconformity Disconformity Shale Conglomerate Diamictite Fitzroy Transpression Erskine Ss. Blina Shale Blina Sh. Liveringa Gp Lightjack Fm. Guadalupian Permian ? Millyit Ss. ? ? Noonkanbah Fm. Cisuralian Poole Sandstone Silurian Llandovery Ordovician Upper Middle Lower 485 Cambrian Precambrian L4 Lloyd oilfield West Kora Ungani Tandalgoo Fm. Valhalla Meda oil Mirbelia Meda gas Yulleroo Terrace St Georges Range Ellendale Blina 1 Janpam North Blina 2 Boronia ? Prices Creek Movement Pridoli Ludlow Kora Point Torment Sundown 2 ? Reef Complexes Middle Wenlock Meda Transpression Worral Fm. Larapintine 2 Frasnian Yellow Drum Fm. Gumhole Fm. Clapp Ridge Mellinjerie Fm. Fm. West Terrace Crimson Lake L3 ? Laurel Fm. Fairfield Group Tournaisian Lower 419 Anderson Fm. Visean Boundary Sundown 1 Reeves Fm. Serpukhovian Framennian ? extensional movements Devonian Carboniferous Upper Mississippian Pennsylvanian Group Alice Springs Orogeny Grant 299 Gondwanan 1 Middle Lower Lopingian Selected hydrocarbon occurrences major offshore subsidence Triassic Upper 252 444 Oil well or field Carbonate–shale Lower 201 359 Shale Mixed siliciclastic and coal Carbonate Jurassic–Cretaceous extensional events offshore Cretaceous Upper Sahara Fm. Carribuddy Mallowa Salt Nibil Fm. Group ? Minjoo Salt Bongabinni Fm. Nita Fm. Prices Goldwyer Fm. Willara Fm. Nambeet Fm. Creek Gp ? Carranya Fm. Wilson Cliffs Ss. Samphire Marsh Movement ? Pictor Dodonea oil Dodonea gas basement RB92 04/02/14 Figure 3. Generalized stratigraphy of the Canning Basin, with major petroleum elements and hydrocarbon occurrences indicated 6 Summary of Petroleum Prospectivity: Canning Basin Table 1. Generalized stratigraphy of the Canning Basin Age Stratigraphy Mesozoic • Basin is capped by a relatively thin Mesozoic section (mainly Upper Jurassic and Lower Cretaceous), which is not considered to have petroleum potential onshore. Upper Carboniferous – Permian • The Grant Gp and Reeves Fm. (in the north) unconformably overlie Paleozoic units in places, and basement rocks along the Anketell Shelf. • The glacial Grant Gp is a known reservoir on the Lennard Shelf and northern Fitzroy Trough. • The remainder of the shallow marine to fluvial Permian section comprises the Poole Sandstone, shaly Noonkanbah Fm., and Liveringa Gp. • All formations, except the Reeves Fm., are exposed on the northern Fitzroy Trough and Lennard Shelf. Regional unconformity • Erosion, caused by basin-wide uplift associated with the Meda Transpression, separates the lower Carboniferous from the upper Carboniferous succession (between the Anderson and Reeves Fms). Devonian – Lower Carboniferous • A complex megasequence is present across much of the northern Canning Basin, ranging from marine reef and basin complexes in the north (best developed on the Lennard Shelf) to non-marine and marginal marine successions in the south. • This succession was never deposited across much of the southwestern basin. Any remnants are likely restricted to the Tandalgoo Sandstone, which often displays excellent reservoir properties. Ordovician to Silurian • The oldest megasequence begins with the shallow marine Nambeet, Willara, Goldwyer, and Nita Formations, in ascending order, capped by the marginal marine evaporitic and redbed Carribuddy Group and Worral Fm. Early Ordovician • Regional deposition in the basin consists of shallow marine carbonate and clastic facies that commenced in response to the extensional Samphire Marsh Movement. Major compressional tectonic events influenced the basin and correlate with its most significant unconformities: Age of unconformity Late Triassic to Early Jurassic Late Carboniferous Early Devonian Compressional event Fitzroy Transpression Meda Transpression Prices Creek Movement Exploration history Exploration in the Canning Basin has taken place during three principal periods. 1919–1920s • Exploration interest in the Canning Basin began in 1919, after water bores showed traces of oil at Prices Creek in the Pillara Range. Three of the four Prices Creek wells yielded traces of oil in massive limestone, which was thought to be lower Carboniferous in age. • Petroleum exploration activity began in the Canning Basin in the early 1920s, when the Freney Oil Company encountered asphaltic shows in drill holes on the Lennard Shelf. Minor exploration followed, with Associated Australian Oilfields joining the search. 7 Summary of Petroleum Prospectivity: Canning Basin 1980s–1990s • In 1979 and 1980, events in Iran and Iraq led to increased world oil prices. • Exploration intensified when the Bureau of Mineral Resources (BMR, now Geoscience Australia) and West Australian Petroleum Pty Ltd. (WAPET) conducted gravity, magnetic, and seismic reflection surveys. • There was an exploration boom in the 1980s, with Home Energy, Amoco, IEDC, Mobil, WMC, BHP, Bridge Oil and others joining the search. • In 1981, Home Energy made the first commercial oil discovery in the basin with their Blina 1 well, which was drilled on a prominent seismic anomaly above the edge of the Lennard Shelf. It initially recovered oil from the Fairfield Group overlying a Devonian reef. • In 1982, Home Energy also discovered oil in the Grant Group and Anderson Formation in the Sundown 1 well. • Up until the mid-1980s, exploration largely focused on the northern and central parts of the Canning Basin. The primary exploration targets were Devonian and Permian–Carboniferous strata. Many exploration wells had shows, especially oil, but only five discoveries resulted in commercial fields: the Blina, Boundary, Lloyd, Sundown and West Terrace oilfields. • The subsalt Ordovician section was the target of companies such as Shell; hydrocarbons were recovered from its Looma 1 well in 1996. This was the first proof of mature, migrated oil from a southern Canning Basin kitchen (Kidson Sub-basin) providing a new exploration play. 2009–2013 • In 2009, Buru Energy completed the first 3D seismic survey in the Canning Basin – the Bunda Survey. • In 2010, Mitsubishi farmed into Buru Energy acreage and provided capital investment for an active exploration program. • In October 2011, Buru Energy’s Ungani 1 well intersected light oil (~37 degrees API gravity) in dolomitised limestone of the Carboniferous Laurel Formation. This was the first significant oil discovery in the Canning Basin since the 1980s and it generated renewed interest. This was reflected in a higher level of bidding for Canning Basin acreage in subsequent work program bidding rounds. • Buru also discovered gas in 2011, in the Laurel Formation at their Valhalla prospect and conducted successful appraisal drilling at their Yulleroo gasfield in 2010 and 2013. • In October 2011, ConocoPhillips announced a farm-in to New Standard Energy’s acreage in the southern Canning Basin. The joint venture has drilled two exploration wells so far, as part of a Goldwyer Formation, liquids-rich shale project. • Hess applied for several areas and obtained more acreage in the Canning Basin by acquiring the unlisted Kingsway Oil in 2012. • In February 2013, a further farm-in was announced by PetroChina, to acreage held by ConocoPhillips and New Standard Energy. • In November 2013, Apache Energy’s farm-in to Buru and Mitsubishi’s coastal and eastern desert acreage was announced. These permits principally cover the Goldwyer Shale areas of the joint venture’s portfolio and are considered prospective for shale oil and gas, as well as for conventional sandstone reservoirs. 8 Summary of Petroleum Prospectivity: Canning Basin • US Energy Information Administration reports in 2011 and 2013 identified the basin as having in excess of 225 TCF of recoverable shale gas based on the Goldwyer Formation play alone. The Australian Council of Learned Academies confirmed this assessment and calculated a further 38 TCF of recoverable shale gas in the Laurel Formation. • As of November 2013, nearly 300 wells had been drilled onshore. Drilling has been accompanied by acquisition of 88 000 line km of 2D seismic and 429 km2 of 3D seismic, all onshore (Fig. 4). 16° Derby Broome 18° Fitzroy Crossing Halls Creek 20° Goldsworthy Marble Bar Telfer CANNING 22° BASIN 24° WESTERN AUSTRAL IA NORTHERN TERRIT ORY Town Coast Petroleum well 26° Gas pipeline Seismic line 200 km 120° 122° 124° 126° 128° RB69a 04/02/14 Figure 4. Map of the Canning Basin showing combined 2D and 3D seismic lines and petroleum wells 9 Summary of Petroleum Prospectivity: Canning Basin Production • A few small fields on the Lennard Shelf produced from Carboniferous– Permian clastics, however the Boundary, Sundown, and West Terrace oilfields are depleted. • Oil has been produced since 1983 from Upper Devonian reservoir intervals at the Blina oilfield. • World-renowned Devonian reefs exposed in the Lennard Shelf provide an excellent insight into the subsurface carbonate geology. • A significant discovery was made at Ungani in October 2011, on the southern margin of the Fitzroy Trough in Lower Carboniferous Laurel Formation dolomites; the well flowed at 1647 barrels of oil per day (BOPD), on a ½ inch choke. Buru Energy is continuing to assess the field for future production and completed the Ungani 3D seismic survey in October 2013. Petroleum systems Paleozoic petroleum systems recognized within the onshore Canning Basin are summarised in Table 2 and Figures 5 and 6. Table 2. Summary of Paleozoic petroleum systems in the Canning Basin Petroleum supersystem Source age Formation Selected hydrocarbon occurrences Vagrant or mixed source Devonian Unknown Mirbelia Gondwanan 1 Permian Noonkanbah Fm. Cycas Larapintine 4 Early Carboniferous Anderson Fm. Lloyd, Boundary Laurel Fm. (Fairfield Gp) Sundown, West Terrace, West Kora, Point Torment Larapintine 3 Larapintine 3 Late Devonian Gogo Fm. Blina Larapintine 2 Ordovician Bongabinni Fm. (Carribuddy Gp) Barbwire Terrace (Dodonea, Percival, Solanum) Goldwyer Fm. MowlaTerrace (Pictor, Edgar Range); Willara Sub-basin (Cudalgarra, Great Sandy, Leo); Broome Platform (Looma) 10 Summary of Petroleum Prospectivity: Canning Basin Point Torment 1 West Kora 1 Lloyd 1-3 Wattle 1/ST1 Boundary 1 West Terrace 1-2 Janpam North 1 Blina 1-7 Boronia 1 Ellendale 1 17° Fitzroy Trough 18° Lennard Shelf Broome Platform Edgar Range 1 Willara Sub-basin 19° Leo 1 Pictor 1-2 Great Sandy 1 ce rra Te Barbwire Terrace Percival 1 Munro Arch rm en ab Gr ire tfo Pla Em y plo nt me rly yca arl nt uk me Wa bay Em llal Wa 21° Billiluna Shelf tty Be ph m Sa al ll Wa 20° Jones Arch Dodonea 1 Cudalgarra 1 Crossland Platform Anketell Shelf Balgo Terrace Gregory Sub-basin CANNING BASIN 22° Kidson Sub-basin 100 km 23° Tabletop Shelf 121° ARG231a 123° 122° Ryan Shelf 125° 124° Carboniferous sourced oil Excellent shows Devonian sourced oil Good shows Fair shows Ordovician sourced oil 126° 127° 128° Poor shows Good source rocks Wells drilled (no shows) 04/02/14 Figure 5. Petroleum system classification of oil shows in the Canning Basin (adapted from Ghori and Haines, 2007) Generating potential 1000 Kerogen type Excellent 1.0 Oil-prone 10 Good Fair Poor 1 1 SNA76 Permian 10 TOC (%) 100 Lower Carboniferous 0.5% Ro 600 400 Oil- and gas-prone 200 0 Stains or shows 0.8 Production index Very good Hydrogen index S2mg/g rock 800 100 Thermal maturity 1000 Oil Wetwindow gas zone Drygas zone 0.6 0.4 0.2 1.35% Ro Gas-prone 380 400 0 420 440 460 Tmax (°C) Devonian 480 500 Immature 380 400 420 440 Tmax (°C) 460 480 500 04/02/14 Ordovician Figure 6. Geochemical evaluation of the Canning Basin’s Ordovician, Devonian, lower Carboniferous and Permian source rocks (adapted from Ghori, 2013) 11 Summary of Petroleum Prospectivity: Canning Basin Source Rocks Effective Paleozoic source rocks are found in the Canning Basin and the principal source rocks are summarized below. Figure 3 shows the stratigraphic relationships. Anderson Formation (Carboniferous) • • Good source rock Limited to the Fitzroy Trough and Lennard Shelf Laurel Formation (lower Carboniferous) • Good to excellent source rock • Limited to the Fitzroy Trough and Lennard Shelf • Entered the peak oil window at various times between the Carboniferous and Mesozoic • Post-mature in areas to the southwest (Fig. 7) • Probably immature on parts of the Lennard Shelf and bounding terraces 120° Pender Terrace 122° 124° INDIAN OCEAN 126° KIMBERLEY CRATON Kora Puratte 128° Yarrada Fit z Yulleroo 18° Blina roy Sundown Tro ug h Paradise Ungani urr a Admiral Bay Fault Zone Bro om Wi lla ra Su Anna Plains b-b Ter rac e Ba rb latf orm n ire Jones Arch e Ar ch ll S nd lf he Sahara Pl atf or CANNING BASIN 22° m Dampier Fenton Zone Kidson Sub-basin PILBARA CRATON ce rra Te e ac sla Nicolay Wilson Cliffs Tabletop Shelf Patience Lake Hevern Contention Heights Kidson OFFICER BASIN lgo Cr os Percival Ba ro ra c rr ry in Te go as tty re b G ubS e ket un Billiluna Shelf Te r Kemp Field Auld Halls Creek St George Range w Be An M lf Asgard Pegasus Frankenstein Oscar Range Pinnacle Fault System he Sally May Munro 20° ar dS Looma McLarty asi nn Fitzroy River Pictor eP Nita Downs Le Valhalla Jur g Broome Ryan Shelf 25km RB82 04/02/14 Canning Basin Gas mature Extent of Laurel* unknown Tectonic unit boundary No Data Oil mature Laurel* eroded *Lower Laurel Member of the Laurel Fm. Petroleum Well Figure 7. Laurel Formation prospectivity map, Canning Basin 12 Summary of Petroleum Prospectivity: Canning Basin Gogo Formation (Devonian) • Good source rock • The Gogo and Laurel Formations are the main suprasalt source rocks in the central Canning Basin. • The Devonian reef complex is within peak oil generation over large areas on the bounding terraces and shelves, and is post-mature in the Fitzroy Trough. Bongabinni Formation (base of Carribuddy Group, Ordovician) • Contains beds of rich oil- and gas-prone source rock locally along the Admiral Bay Fault Zone. • It could potentially extend into the depocentre of the Kidson Sub-basin, but the distribution of the source rocks is not well known. Goldwyer Formation (Ordovician) • Equated with global Cambrian–Ordovician source rocks and regionally with source rocks of the Mereenie oilfield (Amadeus Basin). • Good oil source rock with good potential for large shale gas resources. • Relatively deep-water, shaly facies contain excellent source rocks at two stratigraphic levels on the Barbwire and Mowla Terraces and northern Broome Platform. • Post-mature in the deeper parts of the Fitzroy Trough and Broome Platform (Fig. 8). • Immature along the Broome Platform near the present coastline; currently in the peak oil generating window. • Good source potential is likely elsewhere, such as the Kidson Sub-basin, although the distribution of source rock facies is poorly constrained, owing to limited reliable data. • The formation is also considered to have significant shale gas potential, although commercial production has yet to be realised. 13 Summary of Petroleum Prospectivity: Canning Basin 120° Pender Terrace 122° 124° INDIAN OCEAN Fit z urr a Admiral Bay Fault Zone W Su illara b-b asi n Blina Sundown Paradise Ungani Jur g Broome Yarrada gh Yulleroo Valhalla Ter rac e om Ba Nita Downs rb eP Anna Plains Le nn ar dS latf orm ire Jones Arch lgo ce rra Te Dampier Fenton Zone Ar ch CANNING BASIN Auld m n si ba b- atf or e Pl Su lf Frankenstein nd ry sla go re G Cr os Nicolay he ll S e ket Kemp Field Ba Percival c rra Te ro e y An M un ra c Pegasus Sahara 22° Billiluna Shelf Te r tt Be Munro Halls Creek St George Range w Sally May 20° lf Looma McLarty Oscar Range Pinnacle Fault System he Fitzroy River Asgard Pictor Bro 128° KIMBERLEY CRATON Kora Puratte roy Tro u 18° 126° Lake Hevern Kidson Sub-basin PILBARA CRATON Wilson Cliffs Contention Heights Kidson Tabletop Shelf Patience Ryan Shelf OFFICER BASIN 25km RB83 07/01/14 Canning Basin Gas mature Extent of Goldwyer No Data Oil mature Goldwyer eroded Figure 8. Goldwyer Formation prospectivity map, Canning Basin 14 unknown Tectonic unit boundary Petroleum Well Summary of Petroleum Prospectivity: Canning Basin Reservoirs and Seals A number of reservoirs and seals are summarised in Table 3. Table 3. Summary of principal reservoirs (R) and seals (S) in the Canning Basin Age Rock Unit R/S Lithology Permian Noonkanbah Fm. S Shale Grant Gp: interbedded porous sandstone and shale, potentially creating reservoir–seal couplets S, R Shale, sandstone Reeves Fm. S Sandstone Anderson Fm. R, S Sandstone Laurel Fm. R Dolomite Yellow Drum Fm. R Carbonate ‘Devonian reef complexes’ R, S Reef complexes Tandalgoo Fm. R Sandstone Carboniferous Devonian Worral Fm. – localized R Sandstone Ordovician– Silurian Carribuddy Gp: regional seal, localized reservoirs S, R Salt, shale Ordovician Nita Fm. R Acacia Ss. Member (Willara Fm.): central–eastern parts of the basin R Secondary dolomite Nambeet Fm. R Sandstone Sandstone Prospective areas 1. The Fitzroy Trough has long been considered the most prospective area of the Canning Basin, with shows in the area confirming petroleum generation and migration. Additional attractive characteristics include: • Substantial sedimentary accumulations • Reef carbonate buildups along the northern half-graben hingeline • Southwestern structural development • Potential for a large basin centred gas accumulation (BCGA) along the southern margin. 2. The Kidson Sub-basin to the south shows promise, but contains only 11 drilled wells in 100 000 km2. • The Ordovician subsalt Looma discovery was the first proof of mature migrated oil in the southern Canning Basin. This new exploration play remains to be further tested. • In the south, there is potential for gas generation from the Permian and pre-Ordovician carbonaceous shales and for oil expulsion from shales in the Ordovician Goldwyer Formation. • Salt diapirism is evident in the region and may provide traps in areas that lack major block faulting. “The best remaining frontier prospects lie in young basins where oil generation has occurred recently or in older basins with a high preservation potential such as intracratonic basins with evaporite seals.” Duncan S Macgregor, BP, 1996 15 Summary of Petroleum Prospectivity: Canning Basin Plays There are numerous known types of plays in the Canning Basin, and probably numerous undiscovered plays. Play type varies geographically and stratigraphically; Table 4 and Fig. 9 detail significant plays and their potential analogs. • Fracture systems associated with transfer faults connecting the Lennard Shelf to the deeper Fitzroy Trough control migration and permeability in the carbonate reservoirs of the shelf. Siliciclastic reservoir accumulations there are controlled by effective intraformational seals. • Unconformity traps and draping reservoirs in rotated fault blocks, downthrown rollovers, inversion folds, subsalt traps, and stratigraphic traps all remain to be tested. • Additional, international, Paleozoic analogs include the Michigan Basin, Illinois Basin, Forest City Basin and Delaware Basin of the US, as well as the North Caspian Basin, Ghaba Salt, Ghadamis and Murzuk Basins, Illizi– Berkine Basin and Baltic Basin. Table 4. Key plays in the Canning Basin with potential analogs Age Play International analogs Conventional Paleozoic Truncated reservoirs, base Permian unconformity Permian Worral Fm. – Grant Gp Eastern flank of South Oman suprasalt sombrero dissolution Salt Basin, giant oilfields features Permian– Carboniferous Grant Group, clastics Unayzah Fm., Saudi Arabia; Oman Early Carboniferous Laurel Fm., dolomites Dnieper–Donets Basin, Ukraine Devonian Lennard Shelf carbonate reefs Alberta Basin giant oilfields, (stratigraphic traps) Canada Subsalt } Silurian–Ordovician Carribuddy Gp Goldwyer Fm. Nita Fm. Ordovician Fractured Nita and Goldwyer Fms W. Texas CambrianOrdovician Ellenburger Dolomite, giant gasfields Nita Fm. dolomite and Upper Willara Fm., carbonate Dolomite reservoirs, e.g. prolifically producing Red River Fm, Williston Basin Nambeet Fm., sandstone Possibly Sirte Basin, Libya, giant gasfields and Murzuk Basin, Libya, giant oilfields late Carboniferous Paradox Basin, US Shale gas and oil, and BCGA Carboniferous Laurel Fm., shale gas Barnett Shale, US Laurel Fm., BCGA Dnieper–Donets Basin, Ukraine Devonian Gogo Fm., shale gas Marcellus Shale, US Ordovician Goldwyer Fm., shale gas and shale oil Utica Shale, Bakken Shale, US and Canada 16 Summary of Petroleum Prospectivity: Canning Basin Suprasalt plays 0 Noonkanbah Formation Thickness (metres) Poole Sandstone C B SEAL A2 500 A2 Intra - Grant Fm. U/C A1 A1 Grant Fm. TURTLE STRUCTURE A2 Mellinjerie Fm. CHANNEL Mellinjerie Fm. Grant Fm. TURTLE STRUCTURE A1 & A2 Subsalt plays Nibil REGIONAL SEAL PILLOW C LOWER SALT Nita Fm. ? REEF 500 E SEAL ? D Thickness (metres) 0 Mallowa UPPER SALT ? Unit E ? Goldwyer Fm. SOURCE Nita Fm. ? REEF 04/02/14 RB97 Figure 9. Typical Canning Basin suprasalt and subsalt play types. Models apply to various areas of the Canning Basin. 17 Summary of Petroleum Prospectivity: Canning Basin Table 5. Conventional plays, trap types and objectives validated by hydrocarbon discoveries, Canning Basin (adapted from Bureau of Resource Sciences, 1993) Reservoir Seal Source Grant Fm.*, sandstone Grant Fm.*, shales and siltstones Trap/Objective Discovery (well and type) Upper Carboniferous to Permian — Lennard Shelf Laurel Fm., shales in Fitzroy Trough Compressional culmination with internal stratigraphic traps Sundown 1, oil Unfaulted four-way dip closure within a paleo-monadnock West Terrace 1, oil nd Boundary 1, oil Faulted, four-way dip closure on Laurel Fm. carbonate horizon Crimson Lake 1, oil Carboniferous — Lennard Shelf Anderson Fm., sandstone Laurel Fm., carbonates Anderson Fm., shales nd nd Point Torment 1, gas Laurel Fm., shales in Fitzroy Trough Four-way dip closure Lloyd 1, oil Kora 1, West Kora 1; oil Compressional culmination with internal stratigraphic traps Sundown 1, oil Four-way dip closure Terrace 1, oil Reef-like seismic anomaly Meda 1, oil Laurel Fm., shales Laurel Fm., sandstone Carboniferous — Fitzroy Trough Laurel Fm., limestone Laurel Fm., shales Laurel Fm., shales Anticline Laurel Fm., clastics Laurel Fm., shales Laurel Fm., shales BCGA Valhalla 2, gas Laurel Fm., clastics Fairfield Group, shales Gogo Fm., shales Faulted, four-way dip closure on Intra-Fairfield Gp Ellendale 1, oil and gas Laurel Fm., sandstone St George Range 1, gas Yulleroo 1, gas Devonian — Lennard Shelf and Barbwire Terrace Yellow Drum Fm., leached dolostones Fairfield Group, shales Nullara Fm., carbonates Nullara Fm., shales Gogo Fm., shales Compaction drape closure over Devonian reef Blina 1, oil Reef-like seismic anomaly Jampam North 1, oil Nullara Fm., calcarenite Meda 1, gas Nullara Fm., leached dolostones May River Member, shales Gogo Fm., clastics Gogo Fm., shales Mellinjerie Ls., dolostones Lower Pillara Fm., shales Nita Fm., fractured dolostones Nita Fm., shales Goldwyer Fm., fractured carbonates Goldwyer Fm., shales Nambeet Fm., fractured dolomitic sandstones Possibly Upper Nambeet Fm. nd Shale draped biohermal and biostromal mound Blina 1, oil nd Boronia 1, oil Fault dependent closure at top Nita Fm. level Mirbelia 1, oil Ordovician — Mowla Terrace and Barbwire Terrace Goldwyer Fm., shales Tilted fault block with internal fourway dip closure Pictor 1, oil and gas Fault dependent closure at top Nita Fm. level Dodonea 1, oil Upper Nambeet Fm. ? Dodonea 1, gas Ordovician — Broome Platform and Willara Sub-basin Nita Fm., dolomite nd Acacia Ss. member of Willara Fm., sandstone nd ?Nita Fm., ?carbonates ?Carribuddy Gp, ?shales and evaporites NOTES: Goldwyer Fm., shales in Kidson Sub-basin Broad, gentle anticlinal closure Looma 1 ?Goldwyer Fm., shales in Willara Sub-basin nd Cudalgarra 1 * Grant Fm. – now called Grant Group nd = no data 18 Summary of Petroleum Prospectivity: Canning Basin Other aspects of the Canning Basin relevant to exploration Infrastructure and markets • The towns of Broome and Derby have air and shipping facilities. • Broome also serves as the shipping terminal for refined petroleum (petrol and diesel) for the region (Fig. 10). It was previously used for the export of oil produced from the Blina and associated oilfields. • Perth is the major market for Canning Basin petroleum resources, with potential markets for local power generation in the Kimberley and Pilbara. • The West Kimberley Power Project provides remote area electricity generation. Liquefied natural gas from Karratha is trucked to storage facilities in Broome, Derby, Halls Creek, Fitzroy Crossing and Looma. Gas-fired generators provide electrical power for each of these local communities. Initial capacity of gas-fired generators was 61 MW. • A gas pipeline runs along the southern margin of the basin to Telfer, the site of one of Australia’s largest gold mines. • Buru Energy plans to build the Great Northern Pipeline to transport gas from their Yulleroo and Valhalla discoveries and, to underpin this, has undertaken a Gas Supply Agreement with Alcoa of Australia. Land access, climate, and land use • The sealed, all-weather Great Northern Highway runs along the west and north of the basin, and links the Kimberley and Pilbara with the state’s capital, Perth. It is used to truck oil from the basin to the Kwinana oil refinery in the Perth metropolitan area, in the south of the state. • The Savannah Way runs along the north of the basin, and links Broome with Cairns in north Queensland. • Tracks in the basin include the Kidson Track and the Canning Stock Route. Only a regional network of unmaintained tracks exists in the central and southern areas of the basin. • Remote drilling locations have had roads specifically prepared to facilitate operations. • From December to March, heavy rainfall associated with cyclones can isolate sections of the road network and restrict access. • Many migratory dune systems also affect sections of roads and tracks annually. • Environmental and Land Access regulations apply to all petroleum titles, under the Native Title Act, and Petroleum and Geothermal Energy Resources Act 1967 (which includes private land holdings and pastoral leases) and Environmental Protection Act. These processes are detailed further in the 2012 Explorer’s Guide. • DMP conducts environmental assessments for each granted title and must initiate a state Environmental Impact Assessment on proposals affecting World Heritage properties; National Heritage places; wetlands of international importance; Commonwealth marine areas; or areas with listed threatened species or communities, and internationally protected migratory species. • Environmentally sensitive areas in the Canning Basin include the Kimberley National Heritage Area and the Gibson Desert Nature Reserve. 19 Summary of Petroleum Prospectivity: Canning Basin • Numerous Native Title groups and communities in the Canning Basin have a long history of negotiation with petroleum explorers. These include multiple claimant groups, as well as the Bardi & Jawi, Dambimangari, Gooniyandi, Karajarri, Kiwirrkurra, Martu, Ngurrara, Ngururrpa, Noonkanbah, Rubibi, Tjurabalan and Wanjina Determined Areas. • Geothermal Exploration or Production Licences exist under the same system and legislation as petroleum titles, and can co-exist over the same areas. Currently only one geothermal license, GEP-43, has been granted in the Canning Basin; as of November 2013 this license is pending surrender. 122° 126° 14° Kalumburu INDIAN OCEAN Wyndham Kununurra Ro a d 16° KIMBERLEY REGION r ve Ri P Derby P Broome P Looma P Halls Creek P Fitzroy Crossing y wa gh i H Great Northern Pipeline (proposed) rthe rn 18° Gibb re a t Rou te No Zn Pb CANNING BASIN G 20° Kids on Goldsworthy Port Hedland Trac k Telfer ck Sto Great Sandy Desert Pi e lin pe Marble Bar 22° Nullagine Mn Cu Telfer ng nni Ca PILBARA REGION Newman Goldfields Gas Transmission Pipleine 100 km RB75 04/02/14 Mines Gas pipeline Precambrian Gold Proposed pipeline Public airport Phanerozoic basin Base metals Oil pipeline Port Diamonds Sealed road Iron Unsealed road Community Other Track Town P West Kimberley Power Project (LNG) Railway Figure 10. Simplified Canning Basin infrastructure, illustrating key transport routes, mines, towns and pipelines. 20 Summary of Petroleum Prospectivity: Canning Basin Selected references* General Cook, P, Beck, V, Brereton, D, Clark, R, Fisher, B, Kentish, S, Toomey, J, and Williams, J 2013, Engineering Energy: unconventional gas production. Melbourne Australia, Report for the Australian Council of Learned Academies (ACOLA). Energy Information Administration 2011, World shale gas resources: An initial assessment of 14 regions outside the United States – a report prepared for U.S. Department of Energy: Advanced Resources International Inc., Arlington, Virginia, USA. Energy Information Administration 2013, Technically recoverable shale oil and shale gas resources: An Assessment of 137 shale formations in 41 countries outside the United States – a report prepared for U.S. Department of Energy: Advanced Resources International Inc., Arlington, Virginia, USA. Petroleum Division and Geological Survey of Western Australia 2012, Western Australia’s Petroleum and Geothermal Explorer’s Guide —2012 Edition: Western Australia Department of Mines and Petroleum, 140p. Petroleum systems and geochemistry Carlsen, GM and Ghori, KAR 2005, Canning Basin and global Palaeozoic petroleum systems — a review: APPEA Journal, v. 45, p 349–364. Edwards, DS, Summons, RE, Kennard, JM, Nicoll, RS, Bradshaw, J, Bradshaw, M, Foster, CB, O’Brien, GW and Zumberge JE 1997, Geochemical characteristics of Palaeozoic petroleum systems in northwestern Australia: APPEA Journal, v. 37, p. 351–379. Ghori, KAR 2011, Petroleum geochemistry of the Canning Basin, Western Australia: basic analytical data 2005–10: Geological Survey of Western Australia, Record 2011/13, 80p. Ghori, KAR 2013, Petroleum geochemistry and petroleum systems modelling of the Canning Basin, Western Australia: Geological Survey of Western Australia, Report 124, 33p. Ghori, KAR and Haines, PW 2007, Paleozoic petroleum systems of the Canning Basin, Western Australia: a review, in Extended abstracts: American Association of Petroleum Geologists; AAPG International Conference and Exhibition, Perth, Western Australia, 5 November 2006, 6p. Ghori, KAR and Haines, PW 2006, Petroleum geochemistry of the Canning Basin, Western Australia: basic analytical data 2004–05: Geological Survey of Western Australia, Record 2006/7, 66p. Basin-wide Apak, SN and Carlsen, GM 1997, A compilation and review of data pertaining to the hydrocarbon prospectivity of the Canning Basin: Geological Survey of Western Australia, Record 1996/10, 103p. Cadman, SJ, Pain, L.Vuckovic, V and le Poidevin. SR 1993, Australian Petroleum Accumulation — Canning Basin, WA: Bureau of Resource Sciences, Department of Primary Industries, Report 9, 88p. Jonasson, KE 2001, Western Australia Atlas of Petroleum Fields, Onshore Canning Basin: Petroleum Division, Mineral and Petroleum Resources Western Australia, v. 2, part 1, 72p. SRK Consulting Pty Ltd 1998, Canning Basin Project, 1998. Report prepared for Shell Development Australia: Geological Survey of Western Australia, petroleum exploration report†, P6353 R1 A5 (unpublished), 124p. Hocking, RM, Playford, PE, Haines, PW and Mory, AJ 2008, Paleozoic geology of the Canning Basin — a field guide: Geological Survey of Western Australia, Record 2008/18, 40p. Zhan, Y and Mory. AJ 2013, Structural interpretation of the northern Canning Basin, Western Australia, in The Sedimentary Basins of Western Australia edited by M Keep and SJ Moss: West Australian Basins Symposium, Perth, WA, 18 August 2013, 18p. * Geological Survey of Western Australia publications may be accessed here: http://geodocs.dmp.wa.gov.au/document/documentSearchCriteria.do?from=topNav&cabinetId=1101 † Petroleum exploration reports may be accessed here: www.dmp.wa.gov.au/4187.aspx 21 Summary of Petroleum Prospectivity: Canning Basin Central Canning Basin D'Ercole, C, Gibbons, L and Ghori, KAR 2003, Prospects and leads, central Canning Basin, Western Australia, 2003: Geological Survey of Western Australia, Record 2003/14, 89p. Ferdinando, D 2003, Regional play analysis of the central Canning Basin: Department of Industry and Resources, Petroleum in Western Australia, October 2003, p. 41–44. Eastern Canning Basin Burt, A, Champ, P and Parks, A 2002, Petroleum prospectivity of the eastern Canning Basin, WA: Department of Mineral and Petroleum Resources, 84p. Young, H and Griffiths, C 2002, Sedsim simulation of the eastern Gregory Sub-basin, Canning Basin, WA: Commonwealth Scientific and Industrial Research Organization (CSIRO), 55p. Permian–Carboniferous Apak, SN and Backhouse, J 1999, Stratigraphy and petroleum exploration objectives of the Permo– Carboniferous succession on the Barbwire Terrace and adjacent areas, northeast Canning Basin, Western Australia: Geological Survey of Western Australia, Report 68, 30p. Havord, PJ, Apak, SN and Carlsen, GM 1997, Permo–Carboniferous petroleum reservoir data, selected wells, Canning Basin, Western Australia: Geological Survey of Western Australia, Record 1996/11, 155p. Redfern, J and Williams, BPJ 2002, Canning Basin Grant Group glaciogenic sediments: part of the Gondwanan Permo–Carboniferous hydrocarbon province, in The Sedimentary Basins of Western Australia 3 edited by M Keep and SJ Moss: Petroleum Exploration Society of Australia, Western Australian Basins Symposium, Perth, Western Australia, 20 October 2002; Proceedings, p. 851–871. Margin, JR, Redfern, J and Williams, BPJ 2006, Unlocking the Potential of the Grant Group (Canning Basin, West Australia), Part of the Gondwanan Glaciogenic Hydrocarbon Province, in Extended Abstracts: American Association of Petroleum Geologists; AAPG International Conference and Exhibition, Perth, Western Australia, 5 November 2006. Mory, AJ 2009, A review of the mid-Carboniferous – Permian, Canning Basin, in GSWA 2009 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2009/2, p. 17–18. Mory, AJ 2010, A review of mid-Carboniferous to Triassic stratigraphy, Canning Basin, Western Australia: Geological Survey of Western Australia, Report 107, 130p. Devonian Copp, IA 2000, Subsurface facies analysis of Devonian reef complexes, Lennard Shelf, Canning Basin, Western Australia: Geological Survey of Western Australia, Report 58, 127p. Playford, PE, Hocking, RM and Cockbain, AE 2009, Devonian reef complexes of the Canning Basin, Western Australia: Geological Survey of Western Australia, Bulletin 145, 443p. Silurian and Ordovician Haines, PW 2004, Depositional facies and regional correlations of the Ordovician Goldwyer and Nita Formations, Canning Basin, Western Australia, with implications for petroleum exploration: Geological Survey of Western Australia, Record 2004/7, 45p. Haines, PW 2009, The Carribuddy Group and Worral Formation, Canning Basin, Western Australia: stratigraphy, sedimentology, and petroleum potential: Geological Survey of Western Australia, Report 105, 60p. Haines, PW and Ghori, KAR 2006, Rich oil-prone Ordovician source beds, Bongabinni Formation, onshore Canning Basin, Western Australia, in Extended Abstracts: American Association of Petroleum Geologists; AAPG International Conference and Exhibition, Perth, Western Australia, 5 November 2006, 4p. Taylor, D 1992, A Review of Ordovician source rocks, Canning Basin, Western Australia: Bureau of Mineral Resources, BMR Record 1992/43, 149p. 22
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