柴西南切克里克6号区域古近系储层微观孔隙结构及其控制因素  

Micro-pore structure and main controlling factors of the paleogene reservoir of the Qiekelike 6 region in south-western Qaidam basin

作　　者：王海琦[1] 曹正林[2] 张小军[2] 白涛[1] 孙德才[1] 马锦龙[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]中国石油勘探开发研究院西北分院,兰州730020

出　　处：《兰州大学学报（自然科学版）》2011年第2期1-8,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：甘肃省自然科学基金项目(1010RJZA113);中央高校基本科研业务费专项资金项目(lzujbky-2010-98)

摘　　要：根据孔渗物性、压汞参数、覆压下孔渗测试参数以及大量的岩石薄片、铸体薄片等资料,对切6区古近系含油砂岩储层的微观孔隙特征以及控制孔隙演化的主要因素进行了研究.表明切6区古近系储层孔隙虽然公认以残余原生孔隙为主,但后期经溶蚀作用形成的多种次生溶蚀孔隙对储层实际的渗透性起到更为积极的作用,这主要是由孔隙喉道特征决定的.成岩过程中较强程度的压实作用对原始孔隙度影响最大而胶结作用的影响次之,溶蚀作用大大提高了本区储层的储集与渗透性.According to physical property analysis,casting slice and the technology of high pressure Hg injection,the follow-pressure porosity and permeability sensibility,a large number of rock sections,etc.,this paper studied the structural characteristics of the Qiekelike 6 region of the paleogene oil-bearing sandstone reservoir pores and the main factors controlling the pores of evolution.Although the paleogene reservoir pores in this area were assumed to be mainly residual primary pores,the secondary pores were formed by the dissolution that played a more active role for the reservoir permeability.This is mainly determined by the characteristics of the pore throat.An diagenesis showed compaction to be the greatest impact on the original porosity and cementation to be the second influence factor.The dissolution greatly increases the permeability of the reservoir.

关 键 词：昆北断阶带 砂岩储层 微观孔隙结构 控制因素 

分 类 号：P588.2[天文地球—岩石学] TE122[天文地球—地质学]