LONDON -- Primeline Energy Holdings has completed the re-processing of 3,673 km (2,282 mi) regional 2D seismic data in block 25/34, and has begun a new round of regional evaluation.
The company is exploring for additional resources while proceeding with the preparation of an Overall Development Plan (ODP) for a stand-alone development for the existing Lishui 36-1 discovery. The exploration program involves drilling a step out exploration well in the nearby prospect in the Lishui gas play, adjacent to the Lishui 36-1 discovery. The company also plans further regional evaluation for the remainder of block 25/34.
The Lishui gas play, in the Lishui West basin of East China Sea, is covered by 3D seismic data, and through detailed interpretation, the company has identified several high potential prospects. The remainder of the 7,006-sq km ( sq mi) block 25/34 is covered by 2D seismic data.
In and around this basin there are seven previously drilled wells that had various forms of hydrocarbon shows and flows, the company says. The company believes that channel and canyon systems as identified in the Lishui Gas Play are likely to extend across the basin and could be developed as future drilling targets with significant additional resources potential.
During the period from November 2007 to June 2008, the company carried out a testing program for re-processing part of the 23,000 km (14,292 mi) 2D seismic available, which is of various vintages spanning over 20 years. The company signed a contract with Hispec in June 2008 to reprocess 2D seismic data based on agreed parameters from the testing program.
Hispec has now completed the reprocessing of a total of 3,673 km (2,282 mi) 2D seismic data. The data has been received and the company will now begin the next round of regional evaluation using this new data.
Primeline's regional geological and geophysical evaluation include the interpretation of these regional 2D seismic data in and around block 25/34 and reviewing the information from 12 wells previously drilled in the region by other companies. This regional evaluation is aimed at identifying and documenting the exploration potential in the basin to provide the company with prospect inventories.
The results will guide future exploration work programs in the remainder of block 25/34 outside the Lishui 36-1 gas play area that is covered by 3D seismic data, the company says.
Additionally, following the signing of the agreement in principle for gas sale announced on Oct. 27, the company is now proceeding with the preparation of ODP for the Lishui 36-1 discovery. Project teams are now being established in Shanghai and London to manage the ODP work.