石油与天然气地质
石油與天然氣地質
석유여천연기지질
OIL & GAS GEOLOGY
2001年
1期
9-12
,共4页
任丘%大油田%变换带%冀中坳陷
任丘%大油田%變換帶%冀中坳陷
임구%대유전%변환대%기중요함
任丘古潜山油田是中国乃至世界上高产大油田之一。古潜山圈闭南北长30km，东西宽7km，面积183km2，其储层为下古生界和中上元古界碳酸盐岩，烃源岩为沙河街组二、三段泥质岩，盖层为沙河街组一段和东营组泥岩和膏盐层。主力油藏主要分布在潜山北部中元古界碳酸盐岩中，其形成是沙河街组四段至孔店组沉积期NWW向同口变换带与NNE向任丘凸起共同作用的结果。沙河街组二、三段沉积时期，变换带向北移至莫14-莫2井一带，任丘凸起沉入水下变为潜山，在其东、西两侧分别形成了属于坝县凹陷的陵城洼槽和属于饶阳凹陷的任西洼槽，为任丘油田形成丰富的油源和混合型原油准备了条件。沙河街组一段—东营组沉积时期，变换带向北移至高家堡一带，两个凹陷演化进入衰退期，形成了覆盖该地区的泥岩盖层。东营期末—晚第三纪，烃源岩成熟形成古潜山圈闭大油田。
任丘古潛山油田是中國迺至世界上高產大油田之一。古潛山圈閉南北長30km，東西寬7km，麵積183km2，其儲層為下古生界和中上元古界碳痠鹽巖，烴源巖為沙河街組二、三段泥質巖，蓋層為沙河街組一段和東營組泥巖和膏鹽層。主力油藏主要分佈在潛山北部中元古界碳痠鹽巖中，其形成是沙河街組四段至孔店組沉積期NWW嚮同口變換帶與NNE嚮任丘凸起共同作用的結果。沙河街組二、三段沉積時期，變換帶嚮北移至莫14-莫2井一帶，任丘凸起沉入水下變為潛山，在其東、西兩側分彆形成瞭屬于壩縣凹陷的陵城窪槽和屬于饒暘凹陷的任西窪槽，為任丘油田形成豐富的油源和混閤型原油準備瞭條件。沙河街組一段—東營組沉積時期，變換帶嚮北移至高傢堡一帶，兩箇凹陷縯化進入衰退期，形成瞭覆蓋該地區的泥巖蓋層。東營期末—晚第三紀，烴源巖成熟形成古潛山圈閉大油田。
임구고잠산유전시중국내지세계상고산대유전지일。고잠산권폐남북장30km，동서관7km，면적183km2，기저층위하고생계화중상원고계탄산염암，경원암위사하가조이、삼단니질암，개층위사하가조일단화동영조니암화고염층。주력유장주요분포재잠산북부중원고계탄산염암중，기형성시사하가조사단지공점조침적기NWW향동구변환대여NNE향임구철기공동작용적결과。사하가조이、삼단침적시기，변환대향북이지막14-막2정일대，임구철기침입수하변위잠산，재기동、서량측분별형성료속우패현요함적릉성와조화속우요양요함적임서와조，위임구유전형성봉부적유원화혼합형원유준비료조건。사하가조일단—동영조침적시기，변환대향북이지고가보일대，량개요함연화진입쇠퇴기，형성료복개해지구적니암개층。동영기말—만제삼기，경원암성숙형성고잠산권폐대유전。
Renqiu buried hill oilfield is one of the big oil fields withhigh productivity in China even in the world.The buried hill trap is 30 km2 in north-south,7 km2 in east west with an area of 183 km2.The reservoirs are carbonate rocks of Lower Palaeozoic,Middle and Upper Proterozoic,the source rocks are pelite of Es3+2,the caprocks are mudstone and halite of Es1+Ed.The major oil pools,resulted from NWW striking Tongkou transformation belt and NNE striking Renqiu uplift,are in Middle Proterozoic carbonate rocks in the northern part of the buried-hill.In Es3+2 depositional period,the transformation belt displaced northward to Mo-14 ～Mo-2 Wells neighborhood.Then Renqiu uplift subsided under the water and became the buried hill.Lingcheng subsag in Baxian sag and Renxi subsag in Raoyang sag which are situated in two sides of the buried-hill provided rich hydrocarbon source and mingling crude oil for Renqiu Oilfield.In Es1～Ed period,the transformation belt moved north to Gaojiapu area,resulted in the recession of the two subsags,and formed regional mudstone caprock.In Ed～N period,source rocks matured and formed Renqiu oilfield of buried-hill trap type.
