摘要
为研究鄂尔多斯盆地环江地区侏罗系延安组延10储层特征及主控因素,通过大量岩心观察、测井曲线对比分析、显微镜岩石薄片鉴定、扫描电子显微镜及压汞分析等手段,对环江地区延10砂岩储层的岩石学特征、孔隙特征、物性特征及主控因素进行了详细分析。结果表明:延10砂岩储层以长石岩屑砂岩、岩屑长石砂岩为主,长石石英砂岩、岩屑石英砂岩、岩屑砂岩次之,成熟度一般;区内不同区域间,填隙物的含量存在一定差异,由北至南、自西向东,填隙物含量整体呈降低的趋势;储集空间类型以粒间孔为主、长石溶孔次之,孔隙结构以Ⅱ型为主,平均孔隙度为13.08%,渗透率为54.49 mD;储层物性受沉积环境与成岩作用等多种因素影响;南部地区平均孔隙度和渗透率最高,储层物性最好,有利于油气资源富集。
In order to study the reservoir characteristics and main controlling factors of Yan 10 reservoir of Jurassic Yan’an formation in Huanjiang area of Ordos basin, the petrological characteristics, pore characteristics, physical properties and main controlling factors of Yan 10 sandstone reservoir in Huanjiang area were analyzed in detail by means of a large number of core observation, comparative analysis of logging curves, identification of microscopic thin sections, scanning electron microscope(SEM) and mercury penetration analysis. The results show that with average maturity, Yan 10 sandstone reservoir is mainly composed of feldspathic lithic sandstone and lithic feldspar sandstone, followed by feldspathic quartz sandstone, lithic quartz sandstone and lithic sandstone. Besides, in different parts of the area, the content of interstitial materials differ. From north to south and from west to east, the content of interstitial materials decrease as a whole. The type of reservoir space is mainly intergranular pore and feldspar solution pore is secondary, type Ⅱ pore structure, and its average porosity is 13.08% and permeability is 54.49 mD. Reservoir physical properties are affected by many factors, such as sedimentary environment and diagenesis. The average porosity and permeability of the southern region are the highest, and the reservoir properties are the best, which is beneficial to oil and gas enrichment.
作者
刘小勤
王西强
罗顺社
吕奇奇
张严
LIU Xiaoqin;WANG Xiqiang;LUO Shunshe;Lü Qiqi;ZHANG Yan(School of Geosciences,Yangtze University,Wuhan 430100,China;The Seventh Oil Production Plant of PetroChina Changqing Oilfield,Xi’an 710200,China;Unconventional Oil and Gas Collaborative Innovation Center of Hubei Province,Wuhan 430100,China)
出处
《中国科技论文》
CAS
北大核心
2022年第9期978-985,共8页
China Sciencepaper
基金
国家自然科学基金资助项目(41672099,42101270)。
关键词
储层特征
主控因素
区域差异
延10储层
环江地区
reservoir characteristics
main controlling factors
regional differences
Yan 10 reservoir
Huanjiang area
