Current Status and Prospects of Sinopec's Well Control Technology in Sichuan-Chongqing Region
Sichuan Basin and its surrounding areas are important fields of exploration and development of Sin-opec,which is also a major place for ultra-deep exploration and development.Over the years,the oil and gas ex-ploration and development cover Puguang,Yuanba,Tongnanba and southern Sichuan deep reservoirs,formation pressure varies from 70 MPa(Puguang and Yuanba area)to 100 MPa(some layers in Puguang and Tongnanba area),and even 150 MPa(deep strata of Yuanba and Tongnanba gas field),thus making a serious challenge for ultra-deep drilling and testing,and increasing the risks of well control.Ultra-deep reservoirs is characterized with ultra-high temperature,high pressure,high sulfur and high yield,the engineering geological condition differs con-siderably,leading to a failure for old well control equipment to meet the needs of production,which makes it nec-essary to put forward relative study.Through long-term scientific research and application,Sinopec has accumula-ted a lot of valuable experience a lot of experience in ultra-deep drilling,fracturing of ultra-deep shale gas wells,and the safe drilling in fault-fracture rock combination,leading to an huge enhancement for skills and support,which contributes to the next level of deep earth engineering.
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