"Profile control + nitrogen" technology driving super heavy oil in Tuha Oilfield
China Petroleum network news, as of now, Turpan Hami oilfield in ultra deep oil wells to implement "profile + nitrogen" technology, there are 7 oil wells effective, daily oil increase of 20 tons, for the development of ultra deep heavy oil to provide new technical ideas.
Lukeqin oilfield is one of the world's lowest ultra deep heavy oil field, difficult to develop. In order to improve the water flooding for heavy oil development in the process of lateral and vertical contradictions, Tuha oilfield in Lukeqin oilfield gradually test and promotion of heavy oil chemical profile control technology, and achieved remarkable results. But with the injection quantity influence gradually increased and the reservoir fracture development and other factors, profile control agent, plugging plugging adaptability can not meet the demand, the conventional chemical profile control technology in ultra deep heavy oil effect becomes worse.
The beginning of this year, technical personnel change, absorption of nitrogen foam in ultra deep heavy oil central drive gas injection well group experience, the implementation of the "profile + nitrogen" technology, formed in the formation of nitrogen bubbles, increasing frontal displacement added pressure, improve the chemical profile control effect, expand the swept volume of water flooding.
Tuha oilfield took the lead in testing the profile control + nitrogen technology in Yu Dong 204-25 well group. The water cut rate of the well group is 63% and 38% respectively, which is 204-121, 204-122 and 9.1 tons of daily oil, respectively.
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