KON6 (Kwanza Basin)

Angola License Round 2013/14
Onshore
Kwanza:
Location of
Block KON 6
Block KON 6
Overview
Block KON 6 is an onshore block in the northeast of the Inner
Kwanza Basin. It is a square block with an area of 1,024 Km².
It borders Block KON 3 to the north on latitude 8° 58’ 14’’, Block
KON 7 to the east on longitude 13° 52’ 11’’, Block KON 9 to the
south on latitude 9° 15’ 36’’ and Block KON 5 to the west on
longitude 13° 34’ 47’’.
The schematic cross section below shows Block KON 6 in its regional context. The Tertiary filled Calomboloca Trough runs from
north to south-west through Block KON 6. Either side of the
trough, rafts composed of upper Cretaceous rocks can be found.
50 Km
Local setting
10 Km
Block KON 6 is an underexplored area, with only four wells and
no existing fields, however, it holds potential for future hydrocarbon discoveries. Hydrocarbon shows, and light oil (found in
Calomboloca-1 [CA-1]) discovered in the pre and post-salt sections suggest that an active source kitchen is present. Calomboloca-1 proved the existence of a very thick pre-salt sedimentary
package and excellent quality reservoir rocks in the post-salt.
CA-1
2012 seismic
Legacy seismic
Schematic cross section
SW
Benfica-2
NE
Banza Quitele-1
Block KON 4
Block KON 5
Block KON 6
FundaCalomboloca
Troughs
Quenguela
Trough
Tertiary
Albian
Sag
Cretaceous
Salt
Pre-salt
Basement
–1–
5 Km
Angola License Round 2013/14
Lead 1 – Post-salt (Tertiary)
This lead is a post-salt anticlinal structure on the western edge of
the Calomboloca Trough. Quifangondo Formation (Fm) sandstones form the main reservoir of this lead, which steeply dip into
the trough to the south of the lead.
Source kitchens for this lead occur at the base of the Calomboloca Trough, and possibly the pre-salt Cuvo Fm, with migration
through a possible window in the Aptian salt. Faulting may provide
additional trapping, while seals are likely to be Quifangondo Fm
shales.
Lead 2 – Post-salt (Cretaceous) and Pre-salt
A pre-salt and a series of post-salt leads are stacked in the northwest corner of Block KON 6. The pre-salt lead is a basement tilted
fault block with overlying Cuvo Fm forming a structural trap. Postsalt stratigraphy is almost certainly fully represented, so a series
of stacked reservoirs, from the Binga Member (Mb) to Itombe Mb
are possible.
Binga Mb organic-rich rocks are the likely source for post-salt
reservoirs, or, if the salt has been breached, Cuvo Fm shales.
Cuvo Fm shales from the surrounding grabens are the likely
source for the pre-salt lead.
Faulting here provides the trapping mechanism for the post-salt,
while thick salt provides an effective seal for the pre-salt.
Lead 3 – Pre-salt
This lead is a double anticline structure in sub-salt Cuvo Fm
sediments. Organic rich shales of the Cuvo Fm from the underlying Calomboloca Low are the likely source for this lead, while
overlying salt may provide an effective seal if it is sufficiently thick.
–1–
Angola License Round 2013/14
10 Km
Lead 1
10 Km
Lead 2
10 Km
Lead 3
–1–
Angola License Round 2013/14
Onshore Kwanza Basin – Data Available
Legacy seismic data available:
Survey Name
No. Lines
A_AONO_F00032AI
BA
BJ
BJ_2
BLP
C
CLP
DG
FP
MCP_82
MCP_82_tepa2
MCP_AONO_A09901AI
MLP
MP
MX
NP
Q
QDP74
QNP
QSP
S
VFP
VFP-74
Totals
7
27
23
8
19
51
5
22
10
1
5
1
10
15
16
19
21
2
8
38
9
11
1
329
2012 2D seismic lines available:
Total Length
(Km)
261
406
411
67
248
776
77
364
112
8
41
13
100
212
192
305
460
25
98
372
195
135
6
4,885
Line
Name
Total Length
(Km)
Line
Name
Total Length
(Km)
002-216
002-218
002-220
002-222
002-224
002-226
002-228
002-230
002-232
002-234
002-236
002-238
002-240
002-242
104.9
45.6
108.6
58.0
107.5
29.2
90.2
49.4
95.8
53.5
56.9
50.6
54.3
41.6
002-303a
002-303b
002-303c
002-305
002-307
002-309a
002-309b
002-311
002-313n
002-313s
002-315a
002-315b
002-317
002-318
Total
50.3
30.5
63.5
66.9
87.5
143.6
30.9
163.2
67.2
161.4
132.2
81.8
179.8
62.4
2527.7
Reports available:
Regional Report Onshore Kwanza
KON 3 Block Report
KON 5 Block Report
KON 6 Block Report
KON 7 Block Report
KON 8 Block Report
KON 9 Block Report
KON 17 Block Report

Download Report