ROGTEC Magazine - Russian Oil & Gas Technologies - News, Reviews & Articles

ROGTEC Magazine - Russian Oil & Gas Technologies - News, Reviews & Articles

Caspian Oil and Gas tackles stuck cement string

Monday, August 15th, 2011

Caspian Oil & Gas Limited reports that the operation to recover the stuck cementing string on its West Mailisu #2 well is progressing according to plan.

As reported on 8 August, problems were encountered setting a cement plug to isolate Bed V from water- bearing sands and the string became stuck. However, to date a total of about 1630m of tubing has been removed from the hole and the remaining ~80m is expected to be removed early this week.

Following this removal, a cement plug will be set at the 7” casing shoe (approximately 1709m) before perforating and flow testing Bed III over a 10m interval with the best sand development (1785-1795m – loggers depth).

It has been decided not to test Bed V in this hole due to the severe hole instability, which caused the cementing string to get stuck, and likely formation damage.

The West Mailisu #2 well, which was spudded on 13 June, is on Caspian’s 100%-owned West Mailisu licence in the Kyrgyz Republic, Central Asia. The West Mailisu prospect lies adjacent to the Mailisu IV oil field, which has produced more than 42mmbbls of oil.

Source

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