湖泛泥岩对补偿成藏的控制作用——以绥靖地区长4+5湖泛泥岩为例  

Flooding Shale Controls on Compensatory Reservoir Forming:A Case from Chang4+5 Formation Flooding Shale,Suijing Area

作　　者：李树同[1] 陶辉飞[1,2] 王多云[3] 陈丹丹[1,2] 南北杰[4] 王改娥[4] 李儒春[4] 高月红[4] 

机构地区：[1]中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049 [3]北京师范大学资源学院,北京100875 [4]长庆油田第四采油厂,陕西靖边718500

出　　处：《天然气地球科学》2010年第5期748-754,共7页Natural Gas Geoscience

基　　金：中国科学院"西部之光"人才培养计划项目;甘肃省科技计划项目(编号:1007RJYA013)联合资助

摘　　要：利用岩性、电性等资料识别出了绥靖地区长4+5湖泛泥岩,建立了其识别标志,并研究了其平面展布特征。在此基础上,运用测井技术研究了长4+5湖泛泥岩的厚度、含砂量和总孔隙度3个地层参数,对每个参数赋予权值,综合评价了长4+5湖泛泥岩封盖性级别,将其划分为11个权级数和4个盖层级别,同时,评价了研究区内6个泥岩区带的长4+5湖泛泥岩的盖层级别。最后,分析了长4+5湖泛泥岩对长6油藏和长2油藏补偿成藏的控制作用:①长4+5湖泛泥岩封盖性权级数在10~5之间时,为优—良盖层,其作为长6盖层封堵油气,形成长6岩性油藏;②长4+5湖泛泥岩封盖性权级数在4^-1之间时,为差—非盖层,在较大排驱压力的作用下,油气穿透长4+5湖泛泥岩层,运移至长2圈闭内形成构造—岩性油藏。Here we identified the flooding shale of Chang4＋5 Formation in Suijing area by using lithologic and logging data,established some identifiers of the flooding shale,and illustrated the planar distribution of shales.Using logging technology,we studied three formation parameters（thickness,sand content,and total porosity） of the flooding shale from Chang4＋5 Formation,assigned weights to each parameter,and comprehensive evaluated levels of block and permeate of Chang4＋5 Formation flooding shale,which was divided into eleven weights and four cap-rock levels.Meanwhile we evaluated cap-rock levels of six Chang4＋5 flooding shale zones in Suijing area.At last,we analyzed the compensatory reservoir forming controls of Chang4＋5 flooding shale to Chang6 and Chang2 reservoirs： ① when the block and permeate weight of Chang4＋5 Formation flooding shale was 10 to 5,the cap-rocks was excellent-good to Chang6 Formation,and formed Chang6 lithologic reservoir;②when the block and permeate weight of Chang4＋5 Formation flooding shale was 4 to -1,the cap-rocks was bad to non cap-rocks.Oil and gas penetrated the Chang4＋5 Formation flooding shale under a great propel pressure,migrated to Chang2 traps and formed structural lithologic reservoir.

关 键 词：湖泛泥岩 补偿成藏 总孔隙度 地层参数 绥靖地区 

分 类 号：TE122[石油与天然气工程—油气勘探]