The work, ordered by the Tub-Karagan Operating Company B.V., the operating company established by KazMunaiGas and LUKOIL Overseas on a parity basis, was performed by GeoTeniz of Kazakhstan.
The Tub-Karagan area, with the size of 1,372 square kilometers, is located in the central part of Kazakhstan's sector of the Caspian Sea. The average sea depth in the area is approximately 7-10 meters.
The main objective of the work was to undertake measures required to ensure safe positioning of the Astra jack-up drilling rig at the required location selected earlier, its safe operation and rig out. The drilling rig, owned by LUKOIL-Shelf, a drilling contractor from Astrakhan, has been mobilized for drilling operations at Tub-Karagan on the basis of a decision of the State Procurement Agency of Republic of Kazakhstan.
The drilling of the exploration well to a depth of 2,500 meters to assess the oil and gas potential of the Jurassic, Cretaceous and Triassic sediments at Tub-Karagan is planned for the spring of 2005.
In line with the program of engineering and geological surveys an range of geophysical studies was performed (sideway sonar surveying, hydromagneting profiling, seismic acoustic profiling and high frequency common depth point method), three wells were drilled for the drilling rig's legs, with their depths ranging between 25 and 50 meters, plus one 25-meter well for static penetration testing, and sampling of the soil was carried out on the surveyed area of 3x3 kilometer size.
At the moment the acquired data is being processed and analyzed, and an independent review of the safety aspects of the jackup's positioning on location, operation and rig out is being performed.
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