华庆油田B153井区长6_3重力流超低渗储层特征及成因机制  

Genetic mechanism of ultra-low permeability reservoir of Chang6_3 gravity flow deposits in B153 block,Huaqing

作　　者：刘丽[1] 赵应成[1] 王友净[1] 李佳鸿[1] 闫林辉[1] 惠钢[1] 刘畅[1] 

机构地区：[1]中国石油天然气股份有限公司勘探开发研究院,北京100083

出　　处：《东北石油大学学报》2015年第6期66-75,5,共10页Journal of Northeast Petroleum University

基　　金：中国石油重大科技专项(2011B-1205)

摘　　要：利用岩心、薄片、扫描电镜、X线衍射等资料,研究华庆B153井区长63重力流储层特征、发育控制因素及成因机制.结果表明:长63储层为典型的超低渗储层,岩石类型以长石砂岩和岩屑长石砂岩为主,储集空间以残余原生粒间孔隙为主,溶蚀孔隙次之;储层物性差,非均质性强,受沉积相、岩石矿物组成和成岩演化的综合控制,强压实作用、绿泥石胶结作用、碳酸盐胶结作用及弱溶蚀作用是导致储层低孔、低渗的关键成岩作用;根据不同成岩作用对储层物性影响的强弱程度,将超低渗储层成因机制划分为碳酸盐胶结低渗型、绿泥石胶结—溶蚀低渗型及强压实改造低渗型3种.应用孔隙度反演回剥方法,重建各成因机制低渗储层的致密化过程,为研究区有利储层预测提供地质依据.Based on the comprehensive analysis of core,physical properties,thin section,scanning electron microscopy,X diffraction and other test data,taking the Chang63 gravity flow deposits as example,we studied the reservoir characteristics and its controlling factors,in order to figure out the genetic mechanism of ultra-low permeability reservoir.The results indicated that the reservoir is mainly arkose and debris-feldspar sandstone with typical ultra-low permeability;its reservoir spaces are mainly residual primary intergranular pore,followed by secondary solution pores.The reservoir is of poor physical property and strong heterogeneity,and the rock mineral components,sedimentary microfacies and diagenetic evolution are the controlling factors;Strong compaction,chlorite cementation,carbonate cementation and weak dissolution are the key elements leading to the low porosity and low permeability.According to their degree of influence on reservoir physical properties,the low permeability reservoir is divided into three genetic types,including carbonate cementation low permeability reservoir,chlorite cementation-dissolution low permeability reservoir and strong compaction low permeability reservoir.On this basis,in utilization of the porosity reversion method,this study established the densification process of each genetic mechanism and will provide a reliable geological basis for favorable reservoir prediction.

关 键 词：超低渗储层 重力流 成因机制 致密化过程 华庆B153井区 

分 类 号：TE112.23[石油与天然气工程—油气勘探]