八面河油田增注工艺技术探讨

八面河油田由于注水压力不断上升,部分水井欠注,严重时造成注不进,对应油井因地层能量得不到有效补充而使产量下降。酸化是注水井降压增注的有效手段,但需根据不同的堵塞原因针对性地选用不同的酸化工艺。对原来为见效井组但后期注不进的水井,宜采用常规土酸酸化工艺;对于注水初期就注入困难的水井,宜采用缓速酸化工艺。

Probe into Injection Stimulation Process in Bamianhe Oilfield

Due to constant rising of its water injection pressure, Bamianhe Oilfield runs into the concerns that some water wells are short of water injection, and even difficult to be injected sometimes, bringing production drawdown to corresponding oil wells which cannot obtain sufficient producing energy. Although acid operation helps water- flooding wells stimulate injection through depressurization, it is necessary to select specific acid technology in respond to specific formation blocking. Conventional mud acid technology is available for water wells that had a good water- flooding result in initial waterflooding stage but have difficulty in waterflooding in late stage, and retardance acid one available for those that have difficulty in waterflooding in initial stage.