砂砾岩储层中岩屑含量统计方法及应用:以东营凹陷北带盐家-永安地区沙四段上亚段为例  

The Statistical Method of Detritus Contents in Glutenite Reservoirs and Its Application:A Case Study of the Upper Part of Shasi Member in the Yanjia-Yong’an Block in the Northern Zone of Dongying Depression

作　　者：王军 曲希玉 陈思芮 郭长春 邱隆伟[2] 张习武 WANG Jun;QU Xi-yu;CHEN Si-rui;GUO Chang-chun;QIU Long-wei;ZHANG Xi-wu(Exploration and Development Research Institute,Shengli Oilfield Company,SinoPec,Dongying Shandong 257022,China;College of Geoscience,China University of Petroleum,Qingdao Shandong 266580,China;Caofeidian New Town Construction Project Quality Supervision Station,Tangshan Hebei 063200,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257022 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]曹妃甸新城建设工程质量监督站,河北唐山063200

出　　处：《矿物岩石地球化学通报》2020年第1期51-58,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家科技重大专项(2017ZX05072-002);国家科技重大专项课题(2017ZX05009-002)。

摘　　要：岩屑的类型与含量对于储集层的研究具有重要意义,但是现有的统计方法通常是针对砂级大小的岩屑颗粒,这对于以砂砾混杂为主的砂砾岩储层研究来说会忽视对砾石级大小岩屑的含量统计,进而导致岩屑的统计结果偏差。为了建立适用于砂砾岩储层的岩屑含量统计方法,综合应用FMI成像测井、岩芯观察及薄片鉴定等手段,将宏观砾石级岩屑统计结果和微观砂级岩屑统计结果结合起来,对砂砾岩储层中的岩屑类型与含量进行定量表征,从而在一定程度上降低薄片观察与统计带来的统计学误差。将该方法应用于东营凹陷北带盐家-永安区块沙四段上亚段储层中得到的认识为:盐家区块以碳酸岩岩屑与花岗片麻质岩屑为主,永安区块以硅质岩屑与花岗片麻质岩屑为主;岩屑类型与含量的差异是导致两区块储层物性差异的主要原因之一。The type and content of detritus have a great significance for the study of reservoirs.However,the existing statistical methods are only suitable for the sand-sized detritus.This means that those methods are not suitable for statistics of the gravel-sized detritus in the glutenite reservoirs due to the neglect of gravel-sized detritus leading to incorrect statistical results of detritus.In order to establish a statistical method suitable for making proper statistics of gravel-sized detritus contents in glutenite reservoirs,we have comprehensively used the FMI imaging logging,core observation,and identification of thin sections to quantitatively make statistical results of the macroscopic gravel-sized and microscopic sand-sized detritus contents in glutenite reservoirs for reducing the statistical error caused by only using the identification of thin sections to some extent.The statistical method was applied to study the upper part of the Shasi Member reservoir in the Yanjia-Yong’an area in the northern zone of the Dongying Depression.The results show that carbonate detritus and granitic gneiss detritus are dominant in the Yanjia block,whereas siliceous rock detritus and granitic gneiss detritus are dominant in the Yong’an block.The difference of the type and content of detritus in the Shasi Member reservoirs of the two blocks is one of main reasons causing for the difference of reservoir properties in the two blocks.

关 键 词：砂砾岩储层 砾石级岩屑 砂级岩屑 东营凹陷 FMI成像测井图 

分 类 号：P588.21[天文地球—岩石学]