鄂尔多斯盆地胡尖山-王洼子地区长4+5储层成岩作用及成岩相研究  

Study on the diagenesis and diagenetic facies of Chang 4+5 reservoirs in Hujianshan-Wangwazi area of Ordos Basin

作　　者：张磊[1] 龚福华[1] 任瑞清[2] 李萍[3] 

机构地区：[1]长江大学,湖北荆州434023 [2]中油长庆油田分公司,陕西西安710018 [3]中油辽河油田公司,辽宁盘锦124010

出　　处：《特种油气藏》2009年第5期40-43,47,共5页Special Oil & Gas Reservoirs

基　　金：中油长庆油田分公司"鄂尔多斯盆地胡尖山-王洼子地区储层综合评价"(2007-118)部分成果

摘　　要：利用岩石铸体薄片、扫描电镜和X射线衍射分析等资料,对鄂尔多斯盆地胡尖山—王洼子地区长4+5砂岩的成岩作用及成岩相进行系统研究,结果表明对储层起破坏作用的成岩作用主要有压实、胶结和交代作用,起建设性成岩作用的主要有早期绿泥石胶结和溶蚀作用。认为长4+5砂岩的成岩演化主体已进入中成岩阶段A期,少数达到中成岩(阶段)B期。划分出本研究区的长石溶蚀-绿泥石薄膜胶结相、高岭石胶结相、铁方解石胶结相共3种成岩相,认为长石溶蚀-绿泥石薄膜胶结相为最有利的储集相带,为进一步的储层评价提供了依据。The diagenesis and disgenetic facies of Chang 4+5 reservoirs in Hujianshan-Wangwazi area of Ordos Basin are systematically studied by using the analysis data of rock casting thin sections,scanning electron microscope and X-ray diffraction. The result indicates that the destructive diagenesis to reservoir mainly involves compaction,cementation and metasomatism,while the constructive diagenesis mainly involves chlorite cementation and dissolution at early stage. It is concluded that the diagenetic evolution of Chang 4+5 reservoirs has mostly been in the subphase A of the middle diagenesis,with a little in the subphase B of the middle diagenesis. Three types of diagenetic facies are demarcated for the study area,including feldspar corrosion-chlorite film cementation,kaolinite cementation,and ferrocalcite cementation. The feldspar corrosion-chlorite film cementation is the best reservoir facies,thus providing reference to further reservoir evaluation.

关 键 词：成岩作用 成岩相 长4+5油层组 鄂尔多斯盆地 胡尖山-王洼子地区 

分 类 号：TE121.3[石油与天然气工程—油气勘探]