石油勘探与开发 >

2021 , Vol. 48 >Issue 4: 677 - 686

DOI: https://doi.org/10.11698/PED.2021.04.01

油气勘探

裂陷盆地断层圈闭含油气有效性综合评价——以渤海湾盆地歧口凹陷为例

  • 付晓飞 ,
  • 宋宪强 ,
  • 王海学 ,
  • 刘海涛 ,
  • 汪顺宇 ,
  • 孟令东
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  • 1.东北石油大学CNPC断裂控藏研究室,黑龙江大庆163318;
    2.东北石油大学“陆相页岩油气成藏及高效开发”教育部重点实验室,黑龙江大庆163318;
    3.“油气藏及地下储库完整性评价”黑龙江省重点实验室,黑龙江大庆163318;
    4.黑龙江工程学院,哈尔滨150050;
    5.中国石油勘探开发研究院,北京100083
付晓飞（1973-）,男,内蒙古赤峰人,博士,东北石油大学特聘教授,主要从事断层变形、封闭性及与流体运移研究工作,地址：黑龙江省大庆市高新技术产业开发区学府街99号,东北石油大学,邮编：163318。E-mail：fuxiaofei2008@sohu.com

收稿日期: 2020-09-14

  修回日期: 2021-05-25

  网络出版日期: 2021-07-23

基金资助

国家自然科学基金面上项目“断层破坏盖层机理及封闭性定量评价”（41972157）; 黑龙江省自然科学基金“复杂断裂带成因机制及断块油气藏有效性综合评价研究”（TD2019D001）; 黑龙江省自然科学基金“断层分段生长定量表征及在油气勘探开发中的应用”（QC2018041）; 中国石油天然气股份有限公司科技部重大课题“走滑断裂带油气地质研究与勘探潜力评价”（2019D-0706）

收起

Comprehensive evaluation on hydrocarbon-bearing availability of fault traps in a rift basin: A case study of the Qikou Sag in the Bohai Bay Basin, China

  • FU Xiaofei ,
  • SONG Xianqiang ,
  • WANG Haixue ,
  • LIU Haitao ,
  • WANG Shunyu ,
  • MENG Lingdong
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  • 1. CNPC Fault Controlling Reservoir Laboratory, Northeast Petroleum University, Daqing 163318, China;
    2. Ministry of Education Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Northeast Petroleum University, Daqing 163318, China;
    3. Key Laboratory of Oil & Gas Reservoir and Underground Gas Storage Integrity Evaluation of Heilongjiang Province, Northeast Petroleum University, Daqing 163318, China;
    4. Heilongjiang Institute of Technology, Ha'erbin 150050, China;
    5. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Received date: 2020-09-14

  Revised date: 2021-05-25

  Online published: 2021-07-23

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摘要

以渤海湾盆地歧口凹陷为例,基于断层分段生长历史、油藏精细解剖和地球化学示踪综合分析,建立断层圈闭含油气有效性评价体系。应用转换位移/离距和位移梯度法落实断层圈闭解释的可靠性。应用最大断距相减法恢复断层形成演化历史,进而厘定断层圈闭形成时间有效性。基于歧口凹陷歧南地区已知油藏“断层泥比率-过断层压力差”定量关系求得断层侧向封闭临界断层泥比率为20%,构建基于“断距-砂地比与烃柱高度”关系定量评价图版。基于油藏精细解剖和储集层定量荧光示踪测试结果研究古近系沙河街组一段中亚段盖层适用于泥岩涂抹系数法评价断层垂向封闭性,泥岩涂抹系数临界值为3.5;古近系东营组二段盖层适用于断接厚度法评价断层垂向封闭性,临界断接厚度为70~80 m。综合断层圈闭空间解释有效性、形成时间有效性、侧向封闭有效性、垂向封闭有效性等4个因素,建立歧口凹陷断层圈闭含油气有效性综合评价图版,是断层圈闭风险性评价的依据。 图15 表1 参52

关键词： 断层圈闭; 分段生长; 封闭机理; 再活动断层; 有效性评价; 裂陷盆地; 渤海湾盆地; 歧口凹陷

本文引用格式

付晓飞 , 宋宪强 , 王海学 , 刘海涛 , 汪顺宇 , 孟令东 . 裂陷盆地断层圈闭含油气有效性综合评价——以渤海湾盆地歧口凹陷为例[J]. 石油勘探与开发, 2021 , 48(4) : 677 -686 . DOI: 10.11698/PED.2021.04.01

Abstract

An evaluation system of hydrocarbon-bearing availability of fault traps was established based on the comprehensive analysis of fault segment growth history, fine reservoir anatomy and geochemistry tracing, with the Qikou sag in the Bohai Bay Basin as target area. The displacement/separation transform and displacement gradient method were used to prove the interpretation reliability of fault traps. The method of maximum throw subtraction was used to recover the history of fault growth and determine the availability of the forming period of fault traps. Based on the quantitative relationship between shale gouge ratio (SGR) and cross-fault pressure difference of known reservoirs in southern Qikou sag, the critical SGR of fault lateral sealing was calculated at 20%, and the quantitative evaluation chart based on the relationship of "fault throw-sand-formation ratio and hydrocarbon column height" was constructed. Based on the results of reservoir fine anatomy and quantitative fluorescence tracing test shale smear factor (SSF) method is suitable for evaluating the vertical sealing of faults in the caprock of the middle submember of first member of Palaeogene Shahejie Formation, and the SSF critical value is 3.5. The juxtaposition thickness method is suitable for evaluating vertical sealing of faults in the caprock of the second member of Palaeogene Dongying Formation, and the critical juxtaposition thickness of fault is 70-80 m. By combining four factors, the availability of fault trap interpretation, the availability of the forming period of fault trap, the availability of fault lateral sealing and the availability of fault vertical sealing, the comprehensive evaluation chart on hydrocarbon-bearing availability of fault traps in Qikou sag has been established, which provides a reasonable basis for risk assessment of fault traps.

Key words： fault trap; segment growth; sealing mechanics; revived fault; availability evaluation; rift basin; Bohai Bay Basin; Qikou Sag

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