石油与天然气地质 ›› 2024, Vol. 45 ›› Issue (3): 787-800.doi: 10.11743/ogg20240315

• 油气地质 • 上一篇    下一篇

塔里木盆地富满油田走滑断裂带通源性评价

张艳秋1,2,3(), 陈红汉4(), 王燮培4, 王彭1,2,3, 苏丹梅2, 谢舟1,2,3   

  1. 1.中国石油 塔里木油田公司 勘探开发研究院,新疆 库尔勒 841000
    2.中国石油天然气集团有限公司超深层复杂油气藏勘探 开发技术研发中心,新疆 库尔勒 841000
    3.新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心,新疆 库尔勒 841000
    4.中国地质大学(武汉) 资源学院 石油地质系,湖北 武汉 430074
  • 收稿日期:2024-02-23 修回日期:2024-05-16 出版日期:2024-07-01 发布日期:2024-07-01
  • 通讯作者: 陈红汉 E-mail:zhangyanq-tlm@petrochina.com.cn;hhchen@cug.edu.cn
  • 第一作者简介:张艳秋(1979—),女,高级工程师,塔里木盆地石油地质综合研究。E-mail:zhangyanq-tlm@petrochina.com.cn
  • 基金项目:
    国家科技重大专项(2008ZX05008-003-034);国家重点基础研究发展计划(973计划)项目(2012CB214804);塔里木油田科技项目(T202112)

Assessment of connectivity between source rocks and strike-slip fault zone in the Fuman oilfield, Tarim Basin

Yanqiu ZHANG1,2,3(), Honghan CHEN4(), Xiepei WANG4, Peng WANG1,2,3, Danmei SU2, Zhou XIE1,2,3   

  1. 1.Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China
    2.R&D Center for Ultra-deep Complex Reservoir Exploration and Development,CNPC,Korla,Xinjiang 841000,China
    3.Engineering Research Center for Untra-deep Complex Reservoir Exploration and Development,Xinjiang Uygur Autonomous Region,Korla,Xinjiang 841000,China
    4.Department of Petroleum Geology,School of Earth Resources,China University of Geosciences (Wuhan),Wuhan,Hubei 430074,China
  • Received:2024-02-23 Revised:2024-05-16 Online:2024-07-01 Published:2024-07-01
  • Contact: Honghan CHEN E-mail:zhangyanq-tlm@petrochina.com.cn;hhchen@cug.edu.cn

摘要:

塔里木盆地走滑断裂带对油气藏形成具有控制作用,走滑断裂带与油源连通性对油气运移、聚集非常重要。基于3D地震资料,运用Riedel剪切离散元模型和完全塑性介质-应力上升函数模型,对塔里木盆地富满油田Ⅱ区块FI17走滑断裂带油源连通性进行了评价。研究结果显示:①FI17走滑断裂带海西晚期雁列断裂拖曳点深度(h)理论计算值远小于实测值,表明其走滑断裂T张破裂成因,而非R剪切断裂。②FI17走滑断裂带通源深度平均达9 ~ 18 km,表明该断裂能够将其下伏埋深10 km以下的玉尔吐斯组烃源岩生成的油气直接输导至上覆奥陶系断(缝)溶体圈闭中聚集成藏。③FI17走滑断裂带通源深度(H)自北而南增加,其断控形成油气藏中的原油密度、天然气干燥系数、油气充注期次及各期次贡献度与油源连通性密切相关,表明油源连通性对油气聚集具有控制作用。走滑断裂级别、走向分段性、活动强度和断穿地层不同,控制作用也不同。油源连通性会沿着走向发生显著变化,影响油气垂向输导效能。

关键词: 通源性, 古老烃源岩, 超深层, 走滑断裂, 富满油田, 塔里木盆地

Abstract:

The formation of hydrocarbon reservoirs in the Tarim Basin is significantly influenced by strike-slip fault zones, whose connectivity with source rocks is vital for hydrocarbon migration and accumulation. The 3D seismic data helps us to assess the connectivity of source rocks with the F17 strike-slip fault zone in block Ⅱ of the Fuman oilfield using both a discrete element model (DEM) for Riedel shear structures and a perfectly plastic medium- stress ascending function model. The findings reveal that the drag-point depth (h) of the en echelon faults of FI17 during the Late Hercynian obtained by theoretical calculation is far less than that measured by the Riedel shear DEM. This discrepancy suggests that the strike-slip faults of F17 originated from T-tensional rupturing rather than R-shear rupturing. The average depths of source rocks connected to the FI17 reach up to 9-18 km, suggesting that this fault zone acts as an immediate channel for the migration of hydrocarbons generated by the underlying source rocks of the Yurtus Formation at a burial depth of over 10 km to the overlying fault-karst (or fractured karst) traps of the Ordovician to form reservoirs. The depth (H) of source rocks connected to the FI17 zone increase from north to south. Parameters of the fault-controlled hydrocarbon reservoirs of FI17 zone, such as crude oil density, natural gas dryness coefficient, and hydrocarbon charging stages and their respective contributive degrees, are closely associated with the connectivity of FI17 zone with source rocks. Thereby, such connectivity plays a role in controlling hydrocarbon accumulation, with the controlling effects varying with the order, along-strike segmentation, activity intensity, and strike-slip fault-cut strata. The connectivity of the FI17 with source rocks changes significantly along the fault strikes, which affects the efficiency of vertical hydrocarbon transport.

Key words: connectivity with source rocks, ancient source rock, ultra-deep sequence, strike-slip fault, Fuman oilfield, Tarim Basin

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