新疆石油地质

新疆石油地质 ›› 2022, Vol. 43 ›› Issue (zk(English)): 123-130.

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Characteristics and Connectivity of Fault-Controlled Fractured-Vuggy Reservoirs: A Case Study of Unit T in Tuofutai Area, Tahe Oilfield

LI Jun1, TANG Bochao1, HAN Dong2, LU Haitao1, GENG Chunying1, HUANG Mina1   

  1. 1. No.3 Oil Production Plant, Northwest Oilfield Company, Sinopec, Aksu, Xinjiang 842012, China;
    2. Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China
  • 收稿日期:2022-02-27 修回日期:2022-04-03 出版日期:2023-01-01 发布日期:2023-07-28

Characteristics and Connectivity of Fault-Controlled Fractured-Vuggy Reservoirs: A Case Study of Unit T in Tuofutai Area, Tahe Oilfield

LI Jun1, TANG Bochao1, HAN Dong2, LU Haitao1, GENG Chunying1, HUANG Mina1   

  1. 1. No.3 Oil Production Plant, Northwest Oilfield Company, Sinopec, Aksu, Xinjiang 842012, China;
    2. Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China
  • Received:2022-02-27 Revised:2022-04-03 Online:2023-01-01 Published:2023-07-28
  • About author:LI Jun, E-mail: lijun.xbsj@sinopec.com

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摘要： Fault-controlled fractured-vuggy reservoirs are extremely heterogeneous and exhibit the diversity and complexity in inter-well connectivity. Clarifying the influence of faults and karsts on reservoirs is conducive to reservoir connectivity analysis and injection-production strategy adjustment. Taking Unit T in the Tuofutai area of Tahe oilfield as an example, the development characteristics of reservoirs were systematically analyzed based on the results of seismic interpretation and the analysis of overlying water system and production performance responses. It was clarified that the reservoir development is mainly controlled by faults and surface water systems; the difference in karstification intensity leads to different characteristics of the reservoirs, which makes development wells show different production behaviors and inter-well connectivity. Based on the analysis of dynamic and static data, inter-well connection models suitable for fault-controlled fractured-vuggy reservoirs were established, which can provide a basis for the adjustment of subsequent treatments.

关键词: Tahe oilfield, Tuofutai area, fault-controlled fractured-vuggy reservoir, karstification, main controlling factor, reservoir distri bution, connection model

Abstract: Fault-controlled fractured-vuggy reservoirs are extremely heterogeneous and exhibit the diversity and complexity in inter-well connectivity. Clarifying the influence of faults and karsts on reservoirs is conducive to reservoir connectivity analysis and injection-production strategy adjustment. Taking Unit T in the Tuofutai area of Tahe oilfield as an example, the development characteristics of reservoirs were systematically analyzed based on the results of seismic interpretation and the analysis of overlying water system and production performance responses. It was clarified that the reservoir development is mainly controlled by faults and surface water systems; the difference in karstification intensity leads to different characteristics of the reservoirs, which makes development wells show different production behaviors and inter-well connectivity. Based on the analysis of dynamic and static data, inter-well connection models suitable for fault-controlled fractured-vuggy reservoirs were established, which can provide a basis for the adjustment of subsequent treatments.

Key words: Tahe oilfield, Tuofutai area, fault-controlled fractured-vuggy reservoir, karstification, main controlling factor, reservoir distri bution, connection model