Notice Inviting “Expression of Interest” (EOI) for 3D-OBC/OBN mode data acquisition and processing (pre STM) in Yanam area of Eastern Offshore, India. 1. Oil and Natural Gas Corporation Limited, a premier E&P Company of India, has been conducting seismic surveys for exploration of hydrocarbons by engaging international Geophysical Service providers for such services. 2. In order to broaden the list of pre-qualified bidders EOI is invited from globally reputed geophysical service providers for carrying out 3D-OBC/OBN mode surveys in Yanam PML area (full fold acquisition 450 Sq Km with Bathymetry ranging from 2m550m), KG Offshore , during field season 2014-15 starting in November 2014. Area map, acquisition parameters and tentative processing sequence are appended as Annexutre-I With this EOI, ONGC intends to finalize the scope of work for the ensuing tender and also shortlist vendors as pre-qualified bidders for the said survey. 3. The broad qualification criteria is as under: The company shall necessarily be a marine seismic data acquisition and processing company, shall have proven experience in seismic survey operations, and shall have sufficient personnel, equipment, management and organizational processes to conduct 3D-OBC/OBN mode data acquisition in the area. Subsequently, the data will be processed up to Pre-STM stage . The company should provide details of the technology used by them in the past for data acquisition in such areas as mentioned above (water depth varying between 2 mt to 550 mts). 4. Companies who can demonstrate a successful track record should respond to this EOI by submitting the following documents and details. The documents submitted should be in English and legible. a. Details of experience indicating area, volume, client, year and type of job. Bidder should produce documentary evidence in the form of respective contracts, along with documentary evidence in respect of satisfactory execution of each of those contracts, in the form of copies of any of the documents (indicating respective contract number / work order number and type of services), such as – i. Satisfactory completion (OR) ii. Proof of release of Performance Security after completion of the contract (OR) iii. Proof of settlement / release of final payment against the contract (OR) iv. Any other documentary evidence that can substantiate the satisfactory execution of each of the contracts cited above. b. Details of the technology (OBC/OBN) proposed to be deployed. The details shall include but shall not be limited to proposed survey geometry, likely time period separately for completion of data acquisition and data processing. Any other Page 1 of 6 technique/methodology deemed efficient for the proposed area along with status of availability thereof may also be submitted. c. Experience of the Company in terms of Sq Km of data acquired / processed for OBC/OBN surveys during the last five years in areas similar to that as mentioned at Annexure-I. d. Experience and bio-data of key personnel like Project Manager, Seismologist/ Geophysicist (Marine Operation Manager), Navigation Manager, Quality Control (QC) & Safety Manager, Party Chief(s) and Processing Geophysicist in number of years in respective positions. e. Availability of crew for mobilization in Indian waters in November 2014. f. Details of equipment available with the Company such as cables , receivers , data acquisition system , navigation & positioning system , energy source ( P-P strength , P/ B ratio, source signature. g. Onboard processing system and details of H/w & S/w to carry out processing as detailed at Annexure-I. h. Company profile along with audited financial statement for preceding two financial years. i. List of policies, procedures (including the equipment replacement / up-gradation policy) and quality assurance practices currently in place for the execution of similar work. j. HSE policies, procedures and statistics covering last 5 years. k. Details of legal/court rulings against your company, if any, in last 5 years. l. Undertaking that no contract with ONGC was terminated in the last 5 years due to nonperformance / unsatisfactory performance 5. Interested Companies are requested to submit their response in a sealed cover with the superscription “Expression of Interest (EOI) for 3D-OBC/OBN mode seismic data acquisition and processing (pre STM) in Yanam area (Bathymetry from 4m- 550m) in Eastern Offshore, India” along with supporting documents at following address by 30.01.2014 : Office of General Manager (MM) – I/C MM Oil & Natural Gas Corporation, WOB, MR 2B Priyadarshini, Sion, Mumbai-400022 Tel No. 022-24062205 / 24062208, Fax No.022-24045348 / 24045368. Page 2 of 6 6. EOI Meet ONGC also intends to hold an Expression of Interest Meet from 11 AM onwards on 05/02/2014. The venue for the meet shall be 6th floor Conference Hall, ONGC, Priyadarshini Building, Sion, Mumbai- 400 022. Bidder(s) are required to present/demonstrate their capability, experience and other details as already submitted in the EOI for a maximum duration of 20 minutes. The participating parties are required to give a soft copy of their presentation along with suggestions, if any, to ONGC immediately after the meeting. ONGC reserves the right to accept, reject, or modify the suggestions presented/submitted against the EOI while formulating technical specifications and scope of work for the tender. Page 3 of 6 Annexure 1 A. Data Acquisition Area Map of Yanam Page 4 of 6 Bathymetry approx..(m) Prospect Yanam Area (Encompassin g three PML blocks viz. Yanam, GS29 & Godavari) Survey area 550 Sq Km Zone of Interest msec. (TWT) 2-550m 1000-5200 ms Objective The primary targets in the area include imaging of Early Cretaceous Synrift sequence, Miocene and Pliocene sequence. The basic objective is i) To improve the continuity of the events ii) To image all target sequences specially the syn rift sequence with better velocity control in entire area Acquisition Parameters 1. Bin Size 12.5 x 25 mts 2. Record length : 10 Secs 3. Near offset: as low as possible 4. Far offset : 8000 mts 5. Shot receiver geometry : Orthogonal 6. Nominal foldage :60 B. Data Processing. Zone of interest: 1000ms to 5200ms Proposed Parameters: Bin Size: 12.5 X 25 m Record length: 10 sec (at deepest) Sampling Interval: 2 ms Shooting Direction: Preferably NW-SE Expected dips: 304 deg Fold: 60 Far offset: 8 kms Spheroid: WGS 84, CM-81 General processing sequence Data Loading & Preconditioning 1. Reformat & Nav Merge 2. Data Preparation a. Signature deconvolution, de-bubble and de-noise operators b. Spherical divergence gain c. Trace editing, etc. 3. Component selection. a. Hydrophone & vertical geophones selected for subsequent P-wave processing, b. X & Y for S-wave processing Processing 1. PZ calibration and summation of geophone & hydrophone data 2. Coherent noise attenuation 3. Non- Coherent noise attenuation 4. Tau-PxPy Deconvolution 5. Inverse-Q correction 6. Surface Consistent Deconvolution 7. Surface Consistent Amplitude Compensation 8. Surface Consistent Residual Statics 9. Velocity Model Building 10. Regularisation. 11. Anisotropic Pre-stack Time Migration Page 5 of 6 12. Anisotropic Pre-stack Depth Migration 13. Residual Velocity Analysis 14. Multiple Attenuation 15. Mute 16. 3D Stack 17. De-convolution after stack 18. 3D Random noise attenuation 19. Band Pass filters 20. Residual Gain 21. Outputs in SEG Y format Velocity analysis is to be carried out at 100m X 100m interval. The above sequence is bare minimum and indicative only. The bidder’s experts to design and implement an improved work flow and offer best practices in seismic data processing commensurate with latest industry standards. Page 6 of 6