Tethys Reports Potential Hydrocarbons in Kazakh Wells
Tethys Petroleum briefly updated its operations in Kazakhstan focused on its oil exploration and appraisal program.
The AKD03 (Dione) exploration well is currently at a depth of 2,823 meters (in what is interpreted to be the middle Jurassic sequence) and casing has been run. Hydrocarbons have been indicated from drilling and log data in three zones and a testing program is planned for the near future. Once this testing program has been carried out the well will be drilled deeper into the Triassic sequence.
The G6RE (Dodone) well has now been drilled to a depth of 2,835 meters in order to test a deeper potential oil bearing zone identified from the wireline logs in the original G6 hole. The hole is currently being prepared to run casing but differential sticking in the bottom section probably caused by higher formation pressures and permeable zones has slowed down the process. Once casing has been run, preparations for testing can commence.
On the AKD02 (Doris NW) well further testing of the Jurassic carbonate interval awaits commencement of the testing program on the G6RE well, with both wells being tested as part of an integrated program to maximize efficiency.
Additional Details on AKD03
On the AKD03 well a potential oil bearing zone has been identified in good quality Cretaceous sandstones, these being similar to the reservoir, which flowed over 5,400 barrels of oil per day ("bopd") in the AKD01 Doris discovery well located some 10 km to the north-east. The Jurassic carbonate zone (which tested some 1,400 bopd in the AKD01 well) is also present in the well with a thickness of over 20 meters and with hydrocarbon indications while drilling and on the wireline logs. In addition to these two intervals a third potential oil bearing interval has been identified in the deeper middle Jurassic sequence. This is a coal bearing sequence of probable deltaic origin and with hydrocarbon indications in likely channel sandstones. Testing of this well is planned with the objective of assessing the potential for the production of commercial hydrocarbons, and the possible extent of the reservoirs. Given the work underway on the planned Doris (AKD01) oil development some of these data will be useful for this planning and as such some of the testing of the AKD03 well may be accelerated to take this into account. It is planned to drill the AKD03 well deeper to target the Triassic sequence and to also assess the hydrocarbon potential of the deeper Permian and Carboniferous intervals with a planned total depth of some 4,000 meters. This well is located further into the sedimentary basin than the AKD01 well (which encountered thin sands in the Triassic with oil indications) and it is hoped that the Triassic sandstones will be thicker at this location.
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