大庆石油地质与开发

2018, v.37;No.189(05) 16-21

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鄂尔多斯盆地下奥陶统马五5亚段致密碳酸盐岩储集层评价
ASSESSMENT ABOUT THE TIGHT CARBONATE RESERVOIR OF THE FIFTH SUBMEMBER OF MEMBER MA-5 IN LOWER ORDOVICIAN OF ORDOS BASIN

张丽雯,高星,刘明仁,李婧娟,史云鹤,苏中堂
ZHANG Liwen,GAO Xing,LIU Mingren,LI Jingjuan,SHI Yunhe,SU Zhongtang

摘要(Abstract):

鄂尔多斯盆地下奥陶统马五5亚段白云岩属致密碳酸盐岩油气储集层,在岩石学、孔隙结构研究基础上,对沉积微相、成岩相、储集层厚度、孔隙度、渗透率、产能等多个参数权重赋值,综合评价了马五5亚段白云岩储集层。研究认为:储集层以晶间孔、晶间溶孔及溶缝为主,孔喉较细,中细歪度,属低孔致密储集层;潮间云坪、潮缘滩沉积微相利于储集层发育,白云石化相、强溶蚀亚相、去膏化—白云石化亚相内储集层质量相对较好。研究区划分出Ⅰ类储集层区1处,Ⅱ类储集层区2处,Ⅲ类储集层区1处。
The dolomite of the fifth submember of Member Ma-5 in Lower Ordovician of Ordos Basin belongs to the tight carbonate petroleum reservoir,based on the studies on the petrology and the pore structure,many parameters such as the sedimentary microfacies,diagenetic facies,and reservoir thickness,porosity,permeability,productivity and so forth were weighted and assigned,the reservoir stated above was comprehensively evaluated. The studies show that the reservoir is mainly characterized by intra-crystalline pore,intercrystalline solution pore and dissolved fracture,the pore throat is rather slim,the flexure is middle and fine,belongs to low-porosity tight reservoir; thesedimentary microfacieses of inter-tidal flat and peritidal breach are advantageous to the development of the reservoir,and the reservoir qualities within the dolomitized facies,strongly dissolved subfacies,degypsified-dolomitized subfacies are relatively better. The study area can be divided into one Type-Ⅰreservoir,two Type-Ⅱreservoir and one Type-Ⅲreservoir.

关键词(KeyWords): 致密储集层;白云岩;储集层评价;成岩相;储集层质量;马家沟组
tight reservoir;dolomite;reservoir assessment/evaluation;diagenetic facies;reservoir quality;Majiagou Formation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学青年基金项目“鄂尔多斯盆地天环地区下奥陶统白云岩成因机制分析”(41302087);; 油气藏地质及开发工程国家重点实验室开放基金项目“鄂尔多斯盆地中部下奥陶统马家沟组中组合白云岩成因机理研究”(PLC201202)

作者(Author): 张丽雯,高星,刘明仁,李婧娟,史云鹤,苏中堂
ZHANG Liwen,GAO Xing,LIU Mingren,LI Jingjuan,SHI Yunhe,SU Zhongtang

DOI: 10.19597/J.ISSN.1000-3754.201801039

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