延长油田郝家坪西区长2油层储层特征及影响因素研究  

Reservoir Characteristics of Chang2 Reservoir in Haojiaping West Area of Yanchang Oilfield Research on influencing factors

作　　者：高月 GAO Yue(Xingzichuan Oil Production Plant of Yanchang Oilfield Co.Ltd,Yanan,Shaanxi 716000,China)

机构地区：[1]延长油田股份有限公司杏子川采油厂,陕西延安716000

出　　处：《内蒙古石油化工》2024年第12期107-110,共4页Inner Mongolia Petrochemical Industry

基　　金：延长石油集团公司科技计划项目“杏子川油田郝家坪西区郝46井区长2油层剩余油潜力研究”,项目号:yc-sy2022qt-B-1-2-3。

摘　　要：为明确延长油田郝家坪西区长2油层储层特征影响因素,利用研究区地质基础资料,对该区块长2油层的岩石学特征、物性特征、储层孔隙结构及孔喉大小、分布等,结合岩石薄片、铸体薄片、扫描电镜、图像分析等技术手段进行分析研究。研究结果表明:长2段储层的岩石类型为长石中-细砂岩,碎屑颗粒以长石为主,研究区域的填隙物主要由黏土类、碳酸盐类和长英质构成,一般含量在2%~27%之间,平均为8.6%。以高岭石为主的泥质矿物,其次是绿泥石、伊犁石、伊/蒙混层等泥质矿物;油藏的孔隙结构类型主要是小孔细喉型。储层物性一般,孔隙度平均12.6%,渗透率平均6.1×10^(-3)μm^(2),储层属低孔、低渗砂岩储层;在碳酸盐含量大于5%,物性和碳酸盐含量负相关性明显,储层物性变差的一个重要因素就是碳酸盐胶结。the geological basic data of the study area was used to analyze and study the petrological characteristics,physical properties,reservoir pore structure,pore throat size,distribution,etc.of the Chang2 oil layer in this block,The research results indicate that the rock type of the Chang2 reservoir is feldspar medium to fine sandstone,with feldspar as the main detrital particle.The filling material in the study area is mainly composed of clay,carbonate,and felsic,with a general content of 2% to 27%,with an average of 8.6%.The physical properties of the reservoir are average,with an average porosity of 12.6% and an average permeability of 6.1×10^(-3)μm^(2),the reservoir belongs to low porosity and low permeability sandstone reservoir;When the carbonate content is greater than 5%,there is a significant negative correlation between physicalproperties and carbonate content,and an important factor for the deterioration of reservoir physical properties is carbonate cementation.

关 键 词：长2储层 孔隙结构 物性控制因素 鄂尔多斯盆地 

分 类 号：P618.130.2[天文地球—矿床学]