鄂尔多斯盆地合水地区延长组裂缝发育特征及控制因素  

Fracture development characteristics and controlling factors of Yanchang formation in Heshui area,Ordos Basin

作　　者：屈雪峰[1] 赵中平 雷启鸿[1] 刘建[1] 高武斌 QU Xue-Feng;ZHAO Zhong-Ping;LEI Qi-Hong;LIU Jian;GAO Wu-Bin(Exploration and Development Research Institute,Changqing Oilfield Company,PetroChina,Xi'an 710021,China;Beijing Energy Technology Co.,Ltd.,Beijing 100012,China)

机构地区：[1]长庆油田分公司勘探开发研究院,陕西西安710021 [2]北京爱能泰克科技有限公司,北京100012

出　　处：《物探与化探》2020年第2期262-270,共9页Geophysical and Geochemical Exploration

基　　金：长庆油田5000万吨持续高效稳产关键技术研究与应用(2016E-0505)。

摘　　要：为搞清鄂尔多斯盆地延长组典型致密储层的天然裂缝发育特征,综合利用钻井、岩心、测井和二维地震等资料进行分析,结果表明鄂尔多斯盆地合水地区延长组致密储层发育由走滑断层-破碎带-小尺度裂缝组成的复杂断裂系统,它们共同作用影响地下储层的非均质性、渗流能力,从而对油气生产产生重要影响。因此今后鄂尔多斯盆地伊陕斜坡内的天然裂缝研究应将断层、破碎带和天然小尺度裂缝当成一个系统来分析,仅研究天然小尺度裂缝对客观认识超低渗储层显然是不全面的。Based on the comprehensive utilization of drilling data,logging data and 2-D seismic data,the authors hold that the tight reservoir of Yanchang Formation in Heshui area of Ordos Basin has developed a complex fault system consisting of strike-slip faults,fault damage zones and small-scale fractures,which together affect the heterogeneity and flow capacity of underground reservoirs,thus having an important impact on oil and gas production.So faults,fault damage zones and natural small-scale fractures should be treated as a system to analyze the fracture characteristics of ultra-low permeability reservoirs.The authors hold that only considering small-scale fractures is obviously not comprehensive.This understanding has important implications for the study of fractures in ultra-low permeability reservoirs in Ordos Basin.

关 键 词：裂缝 破碎带 走滑断层 合水地区 

分 类 号：P631.4[天文地球—地质矿产勘探]