Update of exploration work at NEC-OSN-97/2

Vol 6, PW 25 (26 Feb 03) Exploration & Production

IN TROUBLE it might be but Gazprom says it needs a four-month extension of 'Phase-I' to carry out special studies and is believed to have shortlisted a geological and geophysical consultant to carry them out.

Under 'Phase-I' of the minimum work programme Gazprom made the following commitments: To spend $1m on acquisition, processing and interpretation of 2,000-km 2D data To purchase additional data including primary seismic and well logging records To reprocess1,500-km 2D data of an adjacent block To buy and interpret satellite photos of the block To carry out geological modelling 'Phase-I' ended on 14th November 2002 and Gazprom's progress card reads thus: 2,068-km of 2D seismic data has been shot and processed; 4,454-km old 2D seismic data has been scanned, reconstructed, digitised and reprocessed. This includes some seismic data of adjacent NELP-I block NEC-OSN-97/3 (ONGC-GAIL consortium).

In addition, Gazprom has bought logs of well No. MND-7 from the DGH.

As for satellite photos, Gazprom points out - and the DGH agrees - that given the turbid water and high bathymetry of the block they will not serve any useful purpose. Based on experience from 'Phase-I' Gazprom has told Shastri Bhawan that the geology of the block is complex and "beyond normal".

As a result Gazprom could only visualise stratigraphic and geomorphic traps. It now plans to carry out special technology driven studies such as seismic attribute analysis for identification of traps, PIVT analysis, AVO analysis, and seismic stratigraphy.

Gazprom wants to integrate old and new seismic data to complete ongoing geological modelling work. Everything now depends on whether Shastri Bhawan will let it off lightly for exporting data without permission.