乌石凹陷流沙港组储层特征与有利储层分布  

Reservoir physical properties and favorable reservoirs in Liushagang formation in Wushi sag

作　　者：尤丽 招湛杰 李才 吴仕玖 徐守立 刘才 

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《东北石油大学学报》2015年第6期95-101,7,共7页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05023-001-007)

摘　　要：乌石凹陷东区主要储层流二段、流三段分别发育三角洲和扇三角洲相沉积储层,储层物性包括高渗、中渗及低渗,非均质性强,产能差异大.采用常规物性、测井解释、岩石薄片与镜质体反射率、全岩/黏土X线衍射等方法,分析储层特征,根据沉积作用、成岩作用等探讨流二段、流三段储层非均质性主控因素.结果表明,沉积相带及分选性差异是流三段储层非均质性主控因素,较远源区分选性好的水下分流河道发育有利储层;沉积相带及压实作用是流二段储层非均质性主控因素,北部弱压实区为最有利储层,其次为中部的中等压实区,第三为南部的近强压实区.该结果为乌石凹陷流沙港组整体评价与目标优选提供地质依据.Wushi sag of Beibuwan basin in western south China sea have been confirmed as a sag with rich hydrocarbon.Delta and fan-delta deposition are the main reservoir of the second and third member of Liushagang formation.Reservoir physical properties are high,moderate,low permeability all developing,with strong heterogeneity and different capacity.The reservoir characteristics are revealed by normal physical characteristics,logging interpretation,analysis of rock thin and vitrinite reflectance suppression,XRD.The major controlling factors of reservoir physical properties heterogeneity are analyzed from sedimentary facies and diagenesis.It is determined that sedimentary facies and the sorting are the main control factors of the third member of Liushagang formation reservoir heterogeneity.Underwater distributary channel of greater distant source with good sorting can develop favorable reservoir,sedimentary facies and compaction degree are the main control factors of the second member of Liushagang formation reservoir heterogeneity.The less-compacted areas in the northern are the most favorable,the middle compaction areas are favorable area,the less favorable area the areas with compaction near to strong,which can provide these areas with evaluation and well layout.

关 键 词：储层非均质性 沉积作用 成岩作用 有利储层 乌石凹陷 流沙港组 

分 类 号：TE122.1[石油与天然气工程—油气勘探]