青西油田窿六区块储层裂缝有效性研究  

Study on Reservoir Fracture Effectiveness of Block Long 6 of Qingxi Oilfield

作　　者：吴丰[1] 黄丹[1] 袁龙[1] 司马立强[1] 

机构地区：[1]西南石油大学,四川成都610500

出　　处：《特种油气藏》2012年第5期42-45,153,共4页Special Oil & Gas Reservoirs

基　　金：国家重大专项"裂缝-孔隙型碳酸盐岩储层测井识别与评价技术研究"(2011ZX05031-002-006HZ)

摘　　要：青西油田窿六区块下沟组为裂缝型油气藏,裂缝为主要渗流通道,同时提供部分储集空间。岩心观察得到的裂缝发育岩性与倾角结论不能完全反映其地下状态。通过微电阻率成像-常规测井裂缝评价,得到的结论与岩心裂缝观察存在一定差异:有效裂缝主要发育于砂砾岩、泥质白云岩中,且以高角度为主,其次是低角度;白云质泥岩主要发育水平裂缝,有效性差。微电阻率成像-常规测井较岩心观察更适合评价裂缝的有效性。Xiagou Formation of Block Long 6 of Qingxi Oilfield is a fracture type of reservoirs,in which fractures are the main seepage channels and also a part of reserving space.The conclusion of fracture growing lithology and fracture dip angle obtained from core observation can't reflect the real reservoir status in formation.The conclusion obtained from the conventional fracture evaluation log,micro resistivity imaging log,exists a certain difference from core fracture observation.The difference lies in that effective fractures are mainly developed in glutenite and argillaceous dolomite with high angle primarily and low angle secondly and horizontal fractures grow mainly in dolomitic mudstone and its effectiveness is poor.Micro resistivity imaging log,the conventional log,is more suitable for fracture effectiveness evaluation than core observation.

关 键 词：裂缝 有效性 测井评价 微电阻率成像测井 青西油田 

分 类 号：TE121.2[石油与天然气工程—油气勘探]