摘要
以牛东油田为例,利用岩心、薄片、扫描电镜、常规及特殊电测井资料,分析三塘湖盆地马朗凹陷火山岩储层的岩性特征、岩相分布、储集空间类型和岩石物性(包括孔隙度和渗透率)等因素.结果表明:该区含油气的火山岩主要为上石炭统卡拉岗组(C2k),岩性包括熔岩(安山岩和玄武岩)和火山碎屑岩,以熔岩为主,熔岩的平均孔隙度为10.6%,渗透率为2.37×10-3μm2;火山角砾岩类的平均孔隙度为11.3%,渗透率为1.88×10-3μm2,储集空间包括原生气孔、残余气孔、次生溶孔(以杏仁溶蚀孔、斑晶溶蚀孔为主)和裂缝等;火山岩的岩性、岩相及火山岩的次生改造是影响该区火山岩储集性能的重要因素.
With Niudong oilfield as an example, the lithologic features, facies change, storage space types and petrophysical parameters (including porosity and permeability) are analyzed by combining core, core wafer, scanning electron microscope, conventional and special electric logging data. The result shows that the major oil-bearing volcanics in this region is the Upper-Carboniferous Kalagang formation (C2k),which is composed mainly of lava (andesite and basalt) and volcanoclastic rock. The lava has an average porosity of 10.6%, and permeability of 2.37×10-3 μm2 , while the volcanic breccia has an average porosity of 11.3%, and permeability of 1.88×10-3 μm2. The storage space is made up of original pores, residual pores, secondary dissolved pores (primarily almond shaped and phenocryst shaped), and fractures etc. Lithology, lithofacies and secondary reformation are major factors impacting the performance of the volcanic reservoir.
出处
《大庆石油学院学报》
CAS
北大核心
2009年第3期36-42,共7页
Journal of Daqing Petroleum Institute
基金
中国石油天然气股份有限公司专题项目(2008B-0101)
关键词
马朗凹陷
火山岩
溢流相
储集空间
风化淋滤
溶蚀
Malang sag
volcanics
effusive facies
storage space
weathering and leaching
erosion
