姬塬地区低渗砂岩储层微观非均质性表征  

THE SYNTHESIS METHODOLOGY OF MICRO-ANISOTROPY CHARACTERISTIC OF LOW PERMEABILITY SANDSTONE RESERVOIR OF YANCHANG FORMATION,JIYUAN AREA,ORDOS BASIN

作　　者：吴小斌[1] 侯加根[1] 田小洁 孙卫[3] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京昌平102249 [2]长庆油田超低渗研究中心,陕西西安710018 [3]西北大学地质系,陕西西安710069

出　　处：《新疆地质》2011年第3期311-313,共3页Xinjiang Geology

基　　金：国家"973"重点科技攻关项目(2003CB214606);国家科技重大专项:高含水油田提高采收率新技术(2008ZX050114)共同资助

摘　　要：为表征鄂尔多斯盆地低渗储层的微观非均质性,采用铸体薄片、扫描电镜、压汞等测试手段,研究姬塬地区低渗砂岩储层微观非均质性特征及影响因素,并结合多参数模糊聚类分析,将储层微观非均质性划分为较弱、中等和较强3类.通过真实砂岩模型水驱油实验,刻画了3类不同非均质程度模型的流体运动及水驱前缘形态的差异性.室内测试分析研究、地质学定量统计分类及真实砂岩模型水驱油实验相结合的综合研究方法,真实反映低渗储层微观非均质性,对同类储层研究具借鉴意义.The micro-anisotropy characteristic of reservoirs is one of the important and difficult contents in reservoir geology. It is studied form petrology-anisotropy, diagenesis- anisotropy, pore-throat structure- anisotropy in this paper, using canning-electron microscopy and the pressure mercury analyzing.And the water-oil Micro-displacement experiment is simttlated,using authentic sandstone micro-models.Qualitative analysis and quantitative research is combed in this paper also.Micro-heterogeneity of reservoir is related to heterogeneity of sedimentation and diagenesis. Micro-structure of low permeability sandstone is complex.Using multi-parameter fuzzy cluster C cluster analysis, quantitative study of reservoir heterogeneity shows that： it can be divided into weak, medium and strong categories. The experiment results show that the big pore-throat and the micro-fracture are the best channel of fluid movement and the fluid movement has anisotropy. Synthesis methodology of is one of the efficient methods to research micro-anisotropy characteristic of low permeability sandstone reservoirs.

关 键 词：鄂尔多斯 延长组 低渗储层 微观非均质性 水驱油实验 

分 类 号：P618.13[天文地球—矿床学]