川东南地区茅口组第一段灰泥灰岩储层储集空间构成定量分析  

Quantitative analysis of the space composition of marlite reservoir in the first member of Maokou Formation in southeastern Sichuan Basin,China

作　　者：夏文谦 张汉荣[1] 刘瑾 汪雷 XIA Wenqian;ZHANG Hanrong;LIU Jin;WANG Lei(SINOPEC Exploration Company, Chengdu 610041, China)

机构地区：[1]中国石化勘探分公司,成都610041

出　　处：《成都理工大学学报（自然科学版）》2021年第4期435-444,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2017ZX05005-003-004)。

摘　　要：以川东南地区茅口组第一段灰泥灰岩系统岩心资料为基础,通过建立储层岩石物理模型和孔隙度数学模型,对灰泥灰岩段储集空间构成状况进行定量评价。根据灰泥灰岩储层孔隙与各类矿物的关系,可将储集空间分为有机质孔、脆性矿物孔和黏土矿物孔。脆性矿物对孔隙贡献率最高,第6小层脆性矿物孔约为有机质孔的4倍,第1、第3小层脆性矿物孔约为有机质孔、黏土矿物孔的3倍;有机质孔随总孔隙度升高变化不大,而脆性矿物孔、黏土矿物孔增大对总孔隙度有较大贡献;脆性矿物与黏土矿物含量均较高时,孔隙度较高;在黏土矿物含量相近的情况下,脆性矿物含量是决定储层物性的主导因素,且脆性矿物含量高于黏土矿物含量是储层孔隙度提高的信号。脆性矿物作为支撑骨架,为储层提供主要储集空间;黏土矿物和有机质充填于脆性矿物晶粒间,对储集空间有较大贡献。Based on the core data of the limestone system in the first member of Maokou Formation(P2m1)in southeastern Sichuan,a quantitative evaluation of the reservoir space composition of the limestone section is carried out by means of establishment of rock physical model and porosity mathematical model.According to the relationship between the pores of limestone reservoir and various minerals,the marlite reservoir space can be divided into organic pores,brittle mineral pores and clay mineral pores.It shows that the contribution rate of brittle minerals to pores is the highest.The brittle mineral pores in the sixth sublayer are about 4 times that of organic matter pores,and the brittle mineral pores in the first and third sublayers are about 3 times that of organic matter pores and clay mineral pores.When the content of brittle minerals and clay minerals is high,the porosity of the reservoir is high.When the content of clay minerals is similar,the content of brittle minerals is the dominant factor to determine the physical properties of the reservoir.The porosity of the reservoir increases as the content of brittle minerals is higher than that of clay minerals.Brittle minerals,as the supporting skeleton,provide the main reservoir space for the reservoir.Clay minerals and organic matter fill the brittle mineral grains and make contribution to the reservoir space.

关 键 词：川东南地区 茅口组 灰泥灰岩储层 储集空间 定量分析 

分 类 号：TE122.23[石油与天然气工程—油气勘探]