Open up the bottleneck of Tarim oilfield oil and gas exploration"
In late October, with 907 grams of 905 grams of deep wells, deep well injection valve is opened, the Tarim oil field No. 9 grams of deep gas reservoir was put into production successfully, the grams of deep gas daily gas capacity exceeded 19 million cubic meters, becoming the west east gas pipeline project main added source. Reporters learned that, in this process, the Tarim oilfield technical personnel to carry out ultra high pressure brine layer pressure control and drainage technology exploration and practice, effectively open up the bottleneck of oil and gas exploration".
Kuche in the Tarim Basin is the main battlefield of natural gas exploration in Tarim Oilfield, but the geological characteristics of Kuche Piedmont complex layer of ultra high pressure brine common development, caused the formation using conventional drilling technology to normal drilling safety, safety and effect of drilling exploration cycle seriously. In order to ensure the smooth and efficient safety drilling operations carried out in-depth analysis, Tarim oilfield brine layer and horizontal distribution regularity, complexity of the influence of comprehensive consideration of high pressure brine formation environment and tectonic stress, the formation of innovative technology controlled drainage wells. From 2014 to 2017, Tarim Oilfield successively carried out the pilot test of drainage and well control technology in wells such as G 13, G 905, G 1101 and G 132 in the piedmont of Kuche, and achieved success.
In order to implement the drainage well control technology of the 905 grams of deep well as an example, the technology compared with other wells drilling block average loss cycle in high pressure brine layer is shortened by 113 days, the accident rate is reduced by salt rock complex 52.2%, cementing qualification rate of 85.24%.
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