特种油气藏 ›› 2022, Vol. 29 ›› Issue (4): 30-37.DOI: 10.3969/j.issn.1006-6535.2022.04.004

• 地质勘探 • 上一篇    下一篇

油源断裂伴生圈闭形成时期厘定方法及其应用

朱焕来1,2, 陈岩3, 王卫学4, 付广1,2, 宫江萍1,2   

  1. 1.东北石油大学,黑龙江 大庆 163318;
    2.黑龙江省油气藏形成机理与资源评价重点实验室,黑龙江 大庆 163318;
    3.中国石油测井有限公司吉林分公司,吉林 松原 138000;
    4.中国石油大庆油田有限责任公司,黑龙江 大庆 163511
  • 收稿日期:2022-07-02 修回日期:2022-07-12 出版日期:2022-08-25 发布日期:2023-01-09
  • 作者简介:朱焕来(1977—),男,副教授,2001年毕业于大庆石油学院石油与天然气地质勘察专业,2011年毕业于东北石油大学油气田地质工程专业,获博士学位,现主要从事油气地质教学与研究工作。
  • 基金资助:
    国家自然基金“砂泥岩层系中油源正断层输导油气优势路径演化及识别研究”(41872157)、“断砂配置侧向分流运聚油气机理及有利部位识别研究”(42072157)

Method for Determining Formation Period of Associated Traps of Oil Source Faults and Its Application

Zhu Huanlai1,2, Chen Yan3, Wang Weixue4, Fu Guang1,2, Gong Jiangping1,2   

  1. 1. Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. Key Laboratory of Oiland Gas Reservoir Formation Mechanism and Resource Evaluationin Heilongjiang Province, Daqing, Heilongjiang 163318, China;
    3. Jilin Branch of CNPC Logging Co., Ltd., Songyuan, Jilin 138000, China;
    4. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163511, China
  • Received:2022-07-02 Revised:2022-07-12 Online:2022-08-25 Published:2023-01-09

摘要: 为了研究含油气盆地油源断裂附近油气分布规律,在油源断裂伴生圈闭形成机制及形成时期研究的基础上,通过不同地质时期油源断裂的断距-位移曲线反映出来的断裂开始形成时期和分段生长连接时期,确定油源断裂伴生圈闭形态开始形成的时期;通过分析油源断裂断层岩的排替压力与时间变化关系和储层排替压力与时间变化关系,确定油源断裂侧向封闭开始形成时期,二者叠合建立了一套油源断裂伴生圈闭形成时期厘定方法,并将其应用于渤海湾盆地歧口凹陷大张坨断裂在沙一下亚段内伴生圈闭形成时期的厘定中。结果表明:大张坨断裂在沙一下亚段内伴生圈闭形成时期为2.35 Ma,虽晚于沙三段烃源岩大量排出油气时期,但仍可以捕获沙三段烃源岩排出的大量油气,较有利于下伏沙三段烃源岩排出的油气在大张坨断裂附近沙一下亚段内聚集成藏,与目前大张坨断裂附近沙一下亚段已发现油气分布相吻合,表明该方法用于厘定油源断裂伴生圈闭形成时期是可行的。研究结果对认识油气分布及油气勘探的深入具有一定的指导意义。

关键词: 油源断裂, 伴生圈闭, 形成时期, 厘定方法

Abstract: In order to study the distribution law of oil and gas near oil source faults in petroliferous basins, based on the study of formation mechanism and period of associated traps of oil source faults, the initial formation period of associated traps of oil source faults is determined by the fracture initiation period and segment growth connection period reflected by the fault offset-displacement curves of oil source faults in different geological periods. The formation period of lateral sealing of oil source fault is determined by the relationship between displacement pressure of oil source fault rock and displacement pressure of oil and gas migration disk reservoir rock with time. A set of methods for determining the formation period of associated traps of oil source fault is established by superimposing the two methods, and it is applied to the determination of the formation period of associated traps of Dazhangtuo fault in the Es1x formation in Qikou sag, Bohai Bay Basin. The results show that the associated trap formation period of Dazhangtuo fault in Es1x formation is 2.35 Ma, although it is later than the period when the source rocks of the Es3 formation discharge a large amount of oil and gas, but it can still capture a large amount of oil and gas discharged from the source rocks of the Es3 formation, which is more conducive to the accumulation of oil and gas discharged from the underlying source rocks of the Es3 formation in Es1x formation near Dazhangtuo fault. It is consistent with the oil and gas distribution found in the Es1x formation near Dazhangtuo Fault, which indicates that this method is feasible to determine the formation period of associated traps of oil source faults.

Key words: oil source fracture, associated trap, formation period, determination method

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