摘要
通过岩性数据、铸体薄片、扫描电镜、压汞曲线及物性等资料的统计分析，结合前人研究成果，对鄂尔多斯盆地w地区延长组长8段储层的岩石学特征、孔隙结构及物性特征进行了研究。结果表明，该区长8段油层组储层岩石类型主要为中一细粒岩屑长石砂岩，成分成熟度和结构成熟度均较低；岩石物性总体较差，属于低孔、特低渗储层，孔隙类型主要为粒间孔、长石溶孔，次为岩屑溶孔；储层特征及其分布受沉积和成岩作用的综合影响，其中沉积作用是影响储层砂体展布的主要因素。水下分流河道是形成有利储层的主要相带，胶结作用和压实压溶作用是导致储层物性变差的最主要原因，溶蚀作用产生的溶蚀孔隙是重要的储集空间。
Through the statistical analysis of the lithology data, casting thin section, scanning electron microscope, mercury injection curves, physical property and so on, combining previ- ous research achievements, studied the petrology characteristics, pore structure and physical property characteristics of Yanchang formation Chang 8 reservoir in the W area of ordos basin. The results show that the Chang 8 reservoir rock types are mainly middle-fine grained feldspar sandstone, composition maturity and structure maturity are low, petrophysical prop- erty overall is poor, belongs to low porosity, low permeability reservoir, pore type is mainly intergranular pore, feldspar solution pore, and rock debris solution pore, reservoir character- istics and its distribution is comprehensive affected by deposition and diagenesis, the deposition is the main factor of affecting the reservoir sandbody distribution. Underwater distributary channel is the main form of favorable reservoir facies belt, cementation and compaction pressure dissolution is the main cause of reservoir property became poor, pores produced by dissolution are important reservoir space.
出处
《石油化工应用》
CAS
2012年第2期53-58,共6页
Petrochemical Industry Application
关键词
储层特征
长8油层组
姬塬油田
reservoir characteristics
Chang-8 oil member
Jiyuan oilfield
