石油学报 ›› 2019, Vol. 40 ›› Issue (12): 1470-1484.DOI: 10.7623/syxb201912006

• 地质勘探 • 上一篇    下一篇

塔里木盆地顺北地区中—下奥陶统断溶体储层特征及发育模式

李映涛1,2, 漆立新3, 张哨楠4, 云露3, 曹自成2, 韩俊2, 尤东华5, 肖红琳2, 肖重阳2   

  1. 1. 中国石油化工股份有限公司石油勘探开发研究院 北京 100083;
    2. 中国石油化工股份有限公司西北油田分公司勘探开发研究院 新疆乌鲁木齐 830011;
    3. 中国石油化工股份有限公司西北油田分公司 新疆乌鲁木齐 830011;
    4. 西南石油大学地球科学与技术学院 四川成都 610501;
    5. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所 江苏无锡 214151
  • 收稿日期:2018-12-12 修回日期:2019-03-17 出版日期:2019-12-25 发布日期:2020-01-04
  • 通讯作者: 李映涛,男,1986年8月生,2009年获电子科技大学学士学位,2016年获成都理工大学油气田开发地质专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院博士后,主要从事碳酸盐岩储层地质学方面的研究。Email:spark5521@qq.com
  • 作者简介:李映涛,男,1986年8月生,2009年获电子科技大学学士学位,2016年获成都理工大学油气田开发地质专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院博士后,主要从事碳酸盐岩储层地质学方面的研究。Email:spark5521@qq.com
  • 基金资助:

    中国石油化工股份有限公司西北油田分公司项目"塔中北坡奥陶系碳酸盐岩储层特征与发育模式研究"(KJ201737)和中国博士后科学基金面上项目(2018M633661XB)资助。

Characteristics and development mode of the Middle and Lower Ordovician fault-karst reservoir in Shunbei area,Tarim Basin

Li Yingtao1,2, Qi Lixin3, Zhang Shaonan4, Yun Lu3, Cao Zicheng2, Han Jun2, You Donghua5, Xiao Honglin2, Xiao Chongyang2   

  1. 1. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China;
    2. Exploration and Production Research Institute, Sinopec Northwest Oilfield Company, Xinjiang Urumqi 830011, China;
    3. Sinopec Northwest Oilfield Company, Xinjiang Urumqi 830011, China;
    4. College of Geoscience and Technology, Southwest Petroleum University, Sichuan Chengdu 601500, China;
    5. Wuxi Institute of Petroleum Geology, Sinopec Petroleum Exploration and Production Research Institute, Jiangsu Wuxi 214151, China
  • Received:2018-12-12 Revised:2019-03-17 Online:2019-12-25 Published:2020-01-04

摘要:

塔里木盆地顺北油田在上奥陶统覆盖区的非暴露条件下,沿走滑断裂发育大量缝洞储集体。通过高精度三维地震和测井资料分析,结合钻井、录井及生产动态数据,研究认为,塔里木盆地顺北地区的储集空间类型主要为沿深大断裂带的断面发育且受溶蚀改造的大型洞穴或断面空腔,其次为断裂破碎带内的砾(粒)间缝、砾(粒)内缝、高角度构造缝以及伴生的溶蚀孔洞。储层受通源主干走滑断裂带控制,横向非均质性强,但纵向连通性好,断裂面是储层发育的有利部位。主干走滑断裂具有明显的分段性,且断裂带内部结构复杂,发育交织的多重断层核部结构,直接影响着储层的展布。通过岩石学和地球化学综合分析认为,储层最主要的改造流体以通源走滑断裂导致的上行深埋成岩-成烃流体为主,局部存在热液流体成岩改造特征。通源走滑断裂贯穿了层序界面、岩性界面以及热液流体运移界面等多套具备储层物质基础的地层,形成了顺北地区纵向连通性强,横向可延展的规模储集体。

关键词: 顺北地区, 走滑断裂, 流体特征, 地球化学, 储层发育模式

Abstract:

Under the non-exposure conditions of the Upper Ordovician, a large number of fracture-hole aggregates were developed along the strike-slip fault in Shunbei oilfield, Tarim Basin. Through analyzing based on the high accuracy 3D seismic and well logging information, in combination with drilling, logging and dynamic production data, the research suggests that the main types of reservoir space in Shunbei area of Tarim Basin are shown as large caves or cavities formed by corrosion, developed along the deep and large faults nearby the fracture surface, followed by a great quantity of intergravel/grain cracks and intragravel/grain cracks, and high-angle tectonic fracture, associated with dissolution holes in the fracture zone. Reservoir development is controlled by the strike-slip fault zone connecting to the source rock, characterized with strong horizontal heterogeneity and ideal vertical connectivity; fracture surface is a favorable part of reservoir development. The main strike-slip fault presents obvious segmentation; the fault zone has a complex internal structure, developed with interleaved multiple fault-core structure, directly affecting the reservoir distribution. The comprehensive petrological and geochemical analysis indicates that the most important reforming fluid in the reservoir is dominated by upward deeply-buried rock and hydrocarbon-forming fluid generated by the strike-slip fault connecting to the source rock, partially featured with diagenetic reformation from hydrothermal fluid. The strike-slip fault run through multiple strata with reservoir material foundations, such as the sequence interface, lithologic interface and hydrothermal fluid transport interface, forming a large-scale reservoir body with strong vertical connectivity and horizontal extension.

Key words: Shunbei area, strike-slip fault, fluid characteristics, geochemistry, reservoir development model

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