坪北油田特低渗油藏裂缝对开发效果的影响分析  

Influence of Fractures on the Development Effect of Pingbei Extra-low Permeability Oilfield

作　　者：张少波[1] 严利咏[2] 何珍[2] 

机构地区：[1]江汉油田分公司坪北经理部,陕西延安717408 [2]长江大学地球科学学院,湖北荆州434023

出　　处：《石油天然气学报》2010年第4期291-293,共3页Journal of Oil and Gas Technology

基　　金：国家油气重大专项(2008ZX05013)

摘　　要：坪北油田储层属于低孔特低渗油藏,延长组是坪北油田的主力产层。分析表明,坪北油田储层构造裂缝、层间裂缝不发育,作为渗流通道对延长组储层意义不大;压裂缝中的粒间缝与一般的孔喉所起作用相当,而超微压裂缝在原始状态下对渗流没有意义。通过开发实践证实:注水压裂产生的人工裂缝以及附近一定范围受其影响得以沟通和张开的天然裂缝,对开发效果影响很大。Pingbei Oilfield belonged to a low porosity and extra-low permeability reservoir,Yanchang Formation was the main production layer. Analysis showed that tectonic fractures and interbedded fractures were not developed in Pingbei reservoir and had not important sense to Yanchang Formation as a flow path; the function of intergranular fracture was the same as an ordinary pore throat,and super-micro pressure fracture had no sense to percolation under original state. Practical application indicates that artificial fractures induced by waterfooding and fracturing in the vicinity are affected by a range of communication and the opening of natural fractures,it has a great impact on development effectiveness.

关 键 词：坪北油田 延长组 特低渗透油藏 裂缝 注水 开发效果 

分 类 号：P618.13[天文地球—矿床学]