| 冀中坳陷束鹿凹陷潜山不整合特征与油气运聚模式 |
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| 引用本文： | 蔡川,邱楠生,刘念,李振明,王元杰,鱼占文,焦亚先.冀中坳陷束鹿凹陷潜山不整合特征与油气运聚模式[J].地质学报,2020,94(3):888-904. |
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| 作者姓名： | 蔡川 邱楠生 刘念 李振明 王元杰 鱼占文 焦亚先 |
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| 作者单位： | 1) 中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；
2) 中国石油大学（北京）地球科学学院，北京，102249,1) 中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；
2) 中国石油大学（北京）地球科学学院，北京，102249,1) 中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；
2) 中国石油大学（北京）地球科学学院，北京，102249,1) 中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；
2) 中国石油大学（北京）地球科学学院，北京，102249,3) 中国石油华北油田公司勘探开发研究院，河北任丘，062552,3) 中国石油华北油田公司勘探开发研究院，河北任丘，062552,3) 中国石油华北油田公司勘探开发研究院，河北任丘，062552 |
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| 基金项目： | 本文为中国石油天然气股份有限公司重大科技专项“华北油田持续有效稳产勘探开发关键技术研究与应用”(编号2017E- 15)、华北油田公司校企合作课题(编号HBYT- YJY- 2018- JS- 177)资助成果。 |
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| 摘 要： | 本文从冀中坳陷束鹿凹陷潜山顶面不整合接触类型及分布规律、结构特征及输导类型出发，精细刻画了不整合面之下半风化岩石层的垂向岩溶分带特征。在此基础上对典型剖面烃源岩热演化、油气运移进行模拟，建立了研究区潜山油气的运聚模式。结果表明，束鹿凹陷潜山顶面不整合包括4种接触类型、5种结构模式，具有3种输导类型，其中斜坡区和洼槽区西部以侧向型为主，斜坡区局部构造高点与洼中隆为侧向+圈闭型，凸起区以侧向+垂向型为主。不整合面之下半风化岩石孔缝洞体系发育，垂向上可划分为表层岩溶带、垂直渗流带以及三个水平潜流带，具有多期岩溶旋回特征。潜山顶部发育的垂直渗流带是油气沿不整合面运移的主力输导层，而内幕发育的多期水平潜流带是油气向内幕运移的潜在通道。深、浅部烃源岩热演化的差异以及与薄层砾岩是否接触导致了斜坡区与洼中隆潜山油气充注的差异，形成了斜坡区晚期薄层砾岩高效中转、不整合侧向运移、水平潜流带向内幕输导、顺向断层向上输导、反向断层圈闭成藏的油气运聚模式。
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| 关 键 词： | 不整合特征 岩溶分带特征 油气运聚模式 束鹿凹陷潜山带 冀中坳陷 |
| 收稿时间： | 2019/7/11 0:00:00 |
| 修稿时间： | 2019/9/21 0:00:00 |
Unconformity characteristics, hydrocarbon migration, and the accumulation model of the buried hill in the Shulu sag, Jizhong depression |
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| CAI Chuan,QIU Nansheng,LIU Nian,LI Zhenming,WANG Yuanjie,YU Zhanwen and JIAO Yaxian.Unconformity characteristics, hydrocarbon migration, and the accumulation model of the buried hill in the Shulu sag, Jizhong depression[J].Acta Geologica Sinica,2020,94(3):888-904. |
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| Authors: | CAI Chuan QIU Nansheng LIU Nian LI Zhenming WANG Yuanjie YU Zhanwen and JIAO Yaxian |
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| Abstract: | Based on the study of contact types, distribution rules, structural characteristics and transport types of unconformity on the top of buried hills in the Shulu sag, Jizhong depression, the vertical karst zoning characteristics of the semi- weathered rock under the unconformity are precisely described. Based on this data the thermal evolution of source rocks and hydrocarbon migration in typical section are simulated, and the migration and accumulation modes of oil and gas in the buried hill are summarized. The results show that there are four contact types, five structural types and three transport types in the unconformity of buried hill in the Shulu sag. The slope and the area west of the depression are mainly of lateral type, the local structural high point of the slope area and high- in- sag is of lateral and trap type, and the uplift area is of lateral and vertical type. Under the unconformity, the semi- weathered rock can be divided into epikarst zone, vertical percolation zone and three horizontal undercurrent zones. The vertical percolation zone developed at the top of the buried hill is the main transport layer for oil and gas migration along the unconformity surface, and the multi- stage horizontal undercurrent zone developed in the inner reservoir is the potential channel for oil and gas migration to the inner reservoir. Differences in thermal evolution of deep and shallow source rocks, and whether they are in contact with thin- layer conglomerates, lead to differences in oil and gas charging in buried hills of slope areas and depression area. The slope area has a hydrocarbon migration and accumulation mode of efficient transfer of thin- layer conglomerate, lateral migration of unconformity, transfer to inner reservoir in the horizontal undercurrent zone, upward transmission of forward fault, reverse fault trap hydrocarbon. |
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| Keywords: | unconformity characteristics karst zonal characteristics hydrocarbon migration and accumulation mode Shulu sag buried- hill zone Jizhong depression |
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