drill-stem test
drill-stem test
[′dril ′stem ‚test] (petroleum engineering)
Bottom-hole pressure information obtained and used to determine formation productivity.
References in periodicals archive
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"Results from a drill-stem test on well 41 are still pending (initial results are not encouraging), while well 40 failed to flow at commercial rates.
A drill-stem test of the Nullara Limestone produced 35.7degree API (American Petroleum Institute) oil at a rate of 144 kL/d (905 bbl/d) through a 12.7 mm (1/2") choke.
The company has taken this step because of potential future oil production at the well, following a drill-stem test, which achieved a potentially commercial stabilised flow rate of 447 barrels of oil per day, of 34 deg API oil from the Triassic aged Butmah Formation reservoir.
The objective of this test was to obtain reservoir and production information additional to that obtained from the open-hole drill-stem test (DST) carried out in November 2008.A 13.5 metre interval at the top of the reservoir was perforated and flow tested at an average rate of approximately 1460 barrels of oil per day ("bopd") on a 48/64" choke over a four hour test period, and 570 bopd on 32/64" choke over a twelve hour test period.
Additional information will be released after completion of the drill-stem test.
The company's production officer, Reinaldo Belotti, said 'With all necessary equipment already procured from renowned suppliers, the drilling of the first production well and related drill-stem test both completed, we are on track and poised to reach a very important milestone for OGX with the initiation of production in the third quarter of 2011.'
The wireline technology enhances the understanding of the rock and fluid properties of the formation and enables the company to make informed decisions and minimize drill-stem test risks.
This is the third successful drill-stem test flowing at this facility-constrained rate.
The 22/14b-9z well has flowed rate of 2,707 barrels of oil per day through a 56/64' choke during a drill-stem test.
A drill-stem test has returned a stabilized gross flow rate of 2,324 barrels of oil per day (BOPD) through a 35/64 inch choke with a watercut of 0.5%.
The discovery well encountered a significant oil column which is drill-stem tested and flowed at an average restricted rate of 5,500bopd through a 56/64 inch choke.
Three drill-stem tests were conducted, with flow rates between 3,200 and 3,900 barrels per day.
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