Well Testing Operations at Block 72

Source: www.gulfoilandgas.com 2/4/2011, Location: Middle East

The Gabdain-1 basement exploration well commenced drilling on 19 November, 2010. The well was drilled to total depth of 3,485 meters measured depth (approximately 636 meters measured depth into the Basement). Hydrocarbons were observed while drilling through the Kohlan sandstone overlaying the basement interval and an oil sample was recovered from the Kohlan using a wire line MDT tool prior to running intermediate casing.

Hydrocarbon charged fractures were also observed while drilling the upper basement interval. An open hole test was conducted on the basement interval, but no flow to surface was achieved due to the limited fractures encountered in the wellbore at this location.

Following the basement test, a 15 meter interval was perforated in the Kohlan. The Kohlan was placed on test using a small electric submersible pump. The well continued to clean up and was producing at an unstabilized rate of approximately 130-180 barrels per day of 39° API oil at the end of the five-day test. The presence of oil shows in the basement and the Kohlan demonstrates a working hydrocarbon generation and migration system. Studies are underway to determine if a more optimal drilling location is feasible.

The Block 72 partners have approved a second exploration well, Gabdain-2, subject to Government approval. DNO is now preparing to suspend Gabdain-1 and move to the Gabdain-2 location. The Gabdain-2 exploration well will drill a shallow Qishn formation prospect.


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Related Articles: Artificial Lift  Cementing, Stimulation  Directional Drilling  Drilling  Drilling Engineering & Equipment Systems  Enhanced Oil Recovery  General  Logging, Perforating, Testing  Offshore Drilling  Reservoir/Completion Consultants  Workover & Well Services  Workover Rigs/Services 


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