四川长宁地区龙马溪组页岩储层裂缝预测方法研究  

Research on the shale reservoir fracture prediction methods

作　　者：金晓凡 曾靖珂[1,2] 

机构地区：[1]长江大学地球科学学院 [2]长江大学油气资源与勘查技术教育部重点实验室,湖北武汉430100

出　　处：《内蒙古石油化工》2015年第Z1期119-122,共4页Inner Mongolia Petrochemical Industry

基　　金：国家自然科学基金项目(41472123);"页岩油气甜点地质构成要素研究"

摘　　要：页岩气藏拥有独特的"连续成藏"的聚集模式,区别于常规天然气储层的特征以及评价内容和方式,这决定了页岩气储层研究的特殊性。物性极差的页岩储层必须通过压裂改造形成网状裂缝系统才能实现经济有效的开发,所以利用地质、地震、测井和构造应力等资料,结合影响页岩储层压裂缝延伸的地质因素如脆性矿物成分、天然裂缝分布、水平应力场,分析压力和温度异常导致的成岩收缩以及夹层溶蚀改造等影响因素,进行宏观到微观的裂缝预测。通过研究夹层上下叠前叠后反演结果的差异和上覆下伏岩层的岩性差异综合对比,检测水平裂缝的发育和分布,页岩气前期的贮存和为后期压裂改造提供参考依据,改善开发效果。本文以四川盆地长宁地区龙马溪组至五峰组页岩层段作为实例,由研究常规裂缝引申至目前研究尚少的水平裂缝,对页岩水平裂缝发育的层段进行初步预测。Shale gas has unique ' Continuous accumulation' gathering mode,which different from conventional gas reservoir characteristics and evaluation of content determines the specificity of shale gas reservoir studies.Poor physical properties of the shale reservoir fracture system must form a network can be achieved by fracturing the development of cost-effective,so we get the use of geological,seismic,logging and tectonic stress,etc.,combined with the impact of reservoir pressure fractures the shale geology extends factors such as brittle mineral composition,distribution of natural fractures,horizontal stress field,analyze factors diagenetic transformation of contraction and mezzanine erosion that caused by the pressure and temperature anomalies,for fracture prediction macro to the micro.By studying the sandwich down a thick stack of prestack inversion differences and differences in lithology underlying strata overlying comprehensive comparison,development and distribution of crack detection level,pre-shale gas storage and provide reference for the late fracturing,improve development results.In this paper,using the Changning district LongmaxiWufeng group in Sichuan Basin as an example,the research extend from the conventional fractures to horizontal fractures which has little present study,and make a preliminary forecast of the section that has horizontal fractures.

关 键 词：页岩储层 水平裂缝预测 地震属性 成像测井 

分 类 号：P618.13[天文地球—矿床学]