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作 者:张庆国[1] 鲍志东[1] 宋新民[2] 孙继武[3]
机构地区:[1]中国石油大学(北京)资源与信息学院 [2]中国石油勘探开发研究院 [3]吉林石油集团有限责任公司测井公司
出 处:《石油勘探与开发》2008年第2期157-163,共7页Petroleum Exploration and Development
基 金:国家重点基础研究发展计划“973”项目(2006CB202304);中国石油天然气股份有限公司重点攻关项目(PK06004)
摘 要:油田注水开发中后期,储集层单砂体的三维空间展布及相互间连通关系成为研究重点。应用岩心、录井及密井网测井资料,综合层序地层分析及储集层层次分析,把扶余油田扶余油层划分为4个砂层组、13个小层,识别出三角洲平原与三角洲前缘2种亚相以及9种沉积微相、7种单一成因砂体。在沉积微相研究成果基础上,利用顶面拉平的小层对比技术和测井曲线特征变化,提出了复合河道的4种叠加模式,在垂向上和平面上进一步对单体河道边界进行了识别。分析表明,单体河道砂体平均宽度150~500m,平均厚度3~7m,平均宽厚比为40~120。三角洲平原分支河道与三角洲前缘水下分支河道砂体相互切割、叠加形成了宽度和厚度较大的复合河道,构成了油气富集的主要储集体及剩余油挖潜的最有利部位。During the middle and late periods of water-flood, three-dimensional distribution and connection of single sand bodies in reservoirs are important research issues. Based on core analysis and dense well logging, in combination with sequence stratigraphic and hierarchic analysis of reservoirs, the Fuyu oil layer was divided into 4 sand members and 13 subzones. Two sedimentary sub-facies, 9 sedimentary micro-facies and 7 single-genesis sand bodies were identified. Four-type overlay models of combination channels were put forward by using sub-zone contrast technique and characteristic changing of well-logging responses. The single-genesis sand body boundary was identified. The average width and thickness of individual sand body is 150 to 500 meters and 3 to 7 meters, respectively. The average ratio of width to thickness is 40 : 1 to 120 : 1. Wider and thicker composite channels were developed by the cutting and folding of the sand bodies in delta-plain branch channels and delta-front sub-aqueous branch channels, and thus formed the best reservoirs of remaining oil.
关 键 词:扶余油层 单砂体 成因 层次划分 复合河道 剩余油分析
分 类 号:TE122.2[石油与天然气工程—油气勘探]
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