非常规气藏增产改造与监测技术实践

Field practices of unconventional gas reservoir stimulation and monitoring technology

非常规油气藏必须经过增产改造方能投入有效开发,但目前却存在增产改造范围有限、封隔难度大、改造针对性不强等技术瓶颈。为此,针对这些技术难题,四川油气田通过持续技术攻关和对引进技术的消化吸收,初步形成了适应不同类型非常规油气藏储层的增产技术系列,即:①非常规储层机械分层(分段)改造技术系列;②水平井分段改造技术系列;③页岩气藏体积压裂技术;④非常规储层增产改造裂缝监测技术。这些新技术有效地解决了制约非常规油气藏增产改造的技术难题,取得了良好的应用效果,为国内非常规油气藏增产改造提供了强有力的技术支撑。

Unconventional hydrocarbon reservoirs will not be possibly put into real production until being stimulated.However,many technical difficulties have not been overcome yet,such as the limited stimulation range,complex isolation of intervals,invaluable stimulation skills,and so on.In view of this,this paper summarizes the following achievements made by the Sichuan oil and gas operators on the stimulation techniques adaptable to different types of unconventional hydrocarbon reservoirs: the mechanical stratification(segmented) stimulation for unconventional reservoirs;multi-stage stimulation of horizontal wells;the stimulated reservoir volume(SRV) for shale gas recovery;the unconventional reservoir stimulation fracture monitoring technology.In conclusion,the above stimulation techniques can not only help solve the previous bottlenecking problems with good application results,but provide robust support for the unconventional hydrocarbon reservoir stimulation in China.