普通稠油油藏转换开发方式研究与实践
Fault-Block Oil & Gas Field(2012)
Abstract
欢喜岭油田锦612块大凌河油层为高孔、高渗、块状边底水普通稠油油藏。该油藏投产以来,主要依靠天然能量开采,边部油井全部水淹关井,内部地层压力大幅度下降(仅5 MPa左右),原油黏度升高,油井水窜严重,开发效果不理想,寻求有效开发方式迫在眉睫。通过对水驱、蒸汽吞吐、蒸汽驱及非混相驱开发方式的研究与实践,确定锦612块大凌河油层应主要立足于常规注水开发,采用水平井与直井多种组合的注水方式,辅以蒸汽吞吐开发,在注水后期转入非混相驱。非混相驱阶段提高采收率9.77%,区块最终采收率为41.17%。
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Key words
Block Jin 612,immiscible flooding,heavy oil,steam flooding,steam stimulation,waterflooding,development mode
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