神木-榆林地区马五_(1-2)亚段储层物性特征及岩溶作用的影响  

M5_(1-2) submember reservoir physical property characteristics and the effect of karstification in Shenmu-Yulin area

作　　者：唐乐平[1,2] 史婵媛[1,2] 王晔[1,2] 赵永刚[3] 李宁[4] 张栋梁[5] 刘森[3] TANG Leping SHI Chanyuan WANG Ye ZHAO Yonggang LI Ning ZHANG Dongliang LIU Sen(Research Institute of Exploration ＆ Development,PetroChina Changqing Oilfield Company, Xi＇an Shanxi 710018, China National Engineering Laboratory for Exploration ＆ Development of Low Permeability Oil/Gas Field ,Xi＇an Shanxi 710018, China School of Earth Science and Engineering,Xi＇an Shiyou University,Xi＇an Shanxi 710065, China Gas Production Plant 3 of PetroChina Changqing Oilfield Company, Wushenqi Inner Mongolia 017300, China PetroChina Changqing Oilfield Company ,Xi＇an Shanxi 710018, China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]西安石油大学地球科学与工程学院,陕西西安710065 [4]中国石油长庆油田分公司第三采气厂,内蒙古乌审旗017300 [5]中国石油长庆油田分公司,陕西西安710018

出　　处：《石油化工应用》2016年第10期111-114,121,共5页Petrochemical Industry Application

基　　金：中国石油科技创新基金项目;项目编号:2011D-5006-0103;国家科技重大专项计划项目;项目编号:2011ZX05044-3

摘　　要：研究区位于鄂尔多斯盆地东北部,马五_(1-2)亚段储层属于风化壳岩溶储层。通过钻井岩心、铸体薄片、扫描电镜、图像孔隙和阴极发光等分析测试手段的研究,发现该区马五_(1-2)储层发育10类典型孔隙,晶间孔、晶间溶孔、溶蚀孔洞的充填残余孔和非选择性溶孔是有效孔隙,硬石膏溶模孔和盐模孔的充填残余部分有效。统计大量的物性数据,认为马五_(1-2)储层属于特低孔渗储层;靖边气田岩溶储层的物性明显好于该区;马五1中自上而下小层孔隙度和渗透率有逐渐变小的趋势。δ^(18)O值的垂向变化表明,马五1中自上而下大气淡水的影响逐渐减弱,即同生期岩溶作用和表生期岩溶作用逐渐变弱,致使溶蚀孔洞的数量逐渐减少,物性向下变差。Shenmu-Yulin area is located at the northeast of the Ordos basin, M5_（1-2）submember reservoir is the weathering-crust karst reservoir. With a large amount of data of drilled core, casting thin section, SEM, pattern analysis of pore structure and cathodoluminescence,M5_（1-2）submember reservoir developed 10 types of typical pore, the effective pore types are mainly intercrystal pores, intercrystal dissolved pores, residual holes filled with karst caves（dissolved pore）and nonselective solution pores, residual holes filled with moldic pores of gypsum and salt mould pore are effective. With a large amount of physical property data,M5_（1-2）submember reservoir belongs to the extra-low porosity and permeability reservoir.From top to bottom in the M51, the average of the porosity and permeability of the thin layer has a tendency to progressively smaller. The karst reservoir physical properties of Jingbian gasfield is btteer than that of the area. The δ^（18）O values in vertical show that, from top to bottom in the M51, the influence of atmospheric fresh water will gradually diminish, that is synsedimentary karstification and supergene karstification is gradually weaken, the number of dissolved pores is reduced gradually, physical property from top to bottom gradually becomes poor.

关 键 词：孔隙类型 物性特征 岩溶作用 δ18O值 

分 类 号：P618.13[天文地球—矿床学]