鄂尔多斯盆地吴定区域富县组粗富县储集砂岩特征及主控因素  

Characteristics and controlling factors of coarse Fuxian sandstone in Wuqi-Dingbian area,Ordos Basin

作　　者：陈立军[1] 高超利 孟旺才 云电江 吴雨风 CHEN Lijun;GAO Chaoli;MENG Wangcai;YUN Dianjiang;WU Yufeng(Exploration and Development Technology Research Center,Yanchang Oil field Co.,Ltd.,Yan'an 716000,China;School of Earth Science and Resources,Chang'an University,Xi'an 710054,China)

机构地区：[1]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000 [2]长安大学地球科学与资源学院,陕西西安710054

出　　处：《甘肃科学学报》2024年第3期7-14,共8页Journal of Gansu Sciences

摘　　要：侏罗系富县组油层组粗富县储层是鄂尔多斯盆地吴定区域侏罗系产油层之一,但由于对储层特征认识不足导致开发效果未能达到预期。为了向油田调整开发方案提供地质依据,以常规孔渗、等岩心化验为基础,结合铸体薄片等镜下观测技术来分析、探讨研究区富县组产油层主要产油段粗富县储集砂岩的储层特征及其主控因素。研究表明:吴定区域富县组可划分为粗富县与细富县,粗富县与上覆延10砂岩泥岩垮塌界面\,细富县与下伏长1之间的不整合面界面测井曲线特征变化明显;粗富县储集砂岩多见长石岩屑质石英砂岩,以递变悬浮沉积为主,剩余粒间孔以及长石溶孔等次生孔隙发育,整体表现为中(低)孔-低渗储层特征,强溶解作用使储层发育中(高)孔-中(低)渗富油砂体,是富县组油藏主要赋存的层段。The Jurassic coarse Fuxian reservoir is one of the Jurassic oil producers in Wuqi-Dingbian region of Ordos Basin,but the development effect failed to meet the lack of understanding of the reservoir characteristics.This essay provides the geological basis for the adjustment and development scheme of oil field,and discusses the reservoir characteristics and main control factors of coarse Fuxian sandstone,the main production section of the research area.The study shows that Fuxian formation in Wuding area can be divided into coarse Fuxian and fine Fuxian layers,and the logging curve characteristics of the unconformity interface between coarse Fuxian and overlay Yan 10 at the collapse interface and lower Chang 1 change significantly.The aldspar clastic quartz sandstone is common in coarse Fuxian layer,and is mainly recursive suspended deposition in study area.The residual intergranular pores and the secondary pores such as feldspar dissolved pores develop,showing the overall characteristics of high(medium)pore-medium(low)permeability reservoir,and the strong dissolution makes the reservoir develop medium(high)pore-medium(low)permeability oil-rich sand.And coarse Fuxian layer is the main occurrence section of the reservoir in Fuxian formation.

关 键 词：鄂尔多斯盆地 吴定区域 粗富县 储层特征 

分 类 号：P618.13[天文地球—矿床学]