鄂尔多斯盆地高桥地区奥陶系马家沟组马五_(1+2)亚段储层特征  

Reservoir characteristics of Ma 5_(1+2) sub-member of the Ordovician Majiagou Formation in Gaoqiao area,Ordos Basin

作　　者：罗香建 田景春[1] 张锦泉[1] 曹桐生[2] 独育国[3] 赵荣华 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]中国石化华北分公司勘探开发研究院,河南郑州450000 [3]中国石油长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《岩性油气藏》2012年第4期24-28,共5页Lithologic Reservoirs

基　　金：国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05007-004)资助

摘　　要：综合利用岩心薄片、铸体薄片、扫描电镜、压汞测定等资料,对鄂尔多斯盆地高桥地区奥陶系马家沟组马五1+2亚段的储层特征进行了研究。结果表明:高桥地区马五1+2亚段储集岩的类型主要为溶蚀孔洞状白云岩、泥晶—粉晶白云岩,其次是颗粒(砂屑)白云岩和角砾状白云岩;储集岩的孔隙类型主要为溶蚀孔、晶间孔、晶间溶孔,其次为膏模孔和裂隙;储集岩的物性较差,平均孔隙度为3.26%,平均渗透率为1.2mD,且孔隙度与渗透率呈正相关性,总体为非均质性较强的低孔、低渗透储层。通过对该区储层特征的研究,可为下一步的勘探开发提供地质依据。Based on cores,cast thin sections,scanning electron microscope,mercury injection data,this paper studied the reservoir characteristics of Ma 51+2 sub-member of the Ordovician Majiagou Formation in Gaoqiao area.The result shows that the types of reservoir rock are mainly of dissolved dolomite,mud powder crystal dolomite,followed by grain(sand clastic) dolomite and brecciated dolomite.The main reservoir pore types are mainly dissolved pores,intercrystal pores,intercrystal dissolved pores,followed by gypsum mould pores and fractures.The properties of reservoir rocks are poor,the average porosity is 3.26%,and the average permeability is 1.2 mD.With strong heterogeneity,it is totally a low permeability and low porosity reservoir.The study of reservoir characteristics can provide geologic basis for the further exploration and development in this area.

关 键 词：储层特征 马五1+2亚段 高桥地区 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]