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An Overview of the Differential Carbonate Reservoir Characteristic and Exploitation Challenge in the Tarim Basin (NW China)

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  • Lixin Chen

    (Unconventional Gas Research Institute, China Petroleum University, Beijing 102200, China
    PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Zhenxue Jiang

    (Unconventional Gas Research Institute, China Petroleum University, Beijing 102200, China)

  • Chong Sun

    (PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Bingshan Ma

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China)

  • Zhou Su

    (PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Xiaoguo Wan

    (PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Jianfa Han

    (PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Guanghui Wu

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China)

Abstract

The largest marine carbonate oilfield and gas condensate field in China have been found in the Ordovician limestones in the central Tarim Basin. They are defined as large “layered” reef-shoal and karstic reservoirs. However, low and/or unstable oil/gas production has been a big challenge for effective exploitation in ultra-deep (>6000 m) reservoirs for more than 20 years. Together with the static and dynamic reservoir data, we have a review of the unconventional characteristics of the oil/gas fields in that: (1) the large area tight matrix reservoir (porosity less than 5%, permeability less than 0.2 mD) superimposed with localized fracture-cave reservoir (porosity > 5%, permeability > 2 mD); (2) complicated fluid distribution and unstable production without uniform oil/gas/water interface in an oil/gas field; (3) about 30% wells in fractured reservoirs support more than 80% production; (4) high production decline rate is over 20% per year with low recovery ratio. These data suggest that the “sweet spot” of the fractured reservoir rather than the matrix reservoir is the major drilling target for ultra-deep reservoir development. In the ultra-deep pre-Mesozoic reservoirs, further advances in horizontal drilling and large multiple fracturing techniques are needed for the economic exploitation of the matrix reservoirs, and seismic quantitative descriptions and horizontal drilling techniques across the fault zones are needed for oil/gas efficient development from the deeply fractured reservoirs.

Suggested Citation

  • Lixin Chen & Zhenxue Jiang & Chong Sun & Bingshan Ma & Zhou Su & Xiaoguo Wan & Jianfa Han & Guanghui Wu, 2023. "An Overview of the Differential Carbonate Reservoir Characteristic and Exploitation Challenge in the Tarim Basin (NW China)," Energies, MDPI, vol. 16(15), pages 1-14, July.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:15:p:5586-:d:1201673
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    References listed on IDEAS

    as
    1. Xiao He & Guian Guo & Qingsong Tang & Guanghui Wu & Wei Xu & Bingshan Ma & Tianjun Huang & Weizhen Tian, 2022. "The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China," Energies, MDPI, vol. 15(21), pages 1-14, November.
    2. Qinghua Wang & Yintao Zhang & Zhou Xie & Yawen Zhao & Can Zhang & Chong Sun & Guanghui Wu, 2022. "The Advancement and Challenges of Seismic Techniques for Ultra-Deep Carbonate Reservoir Exploitation in the Tarim Basin of Northwestern China," Energies, MDPI, vol. 15(20), pages 1-13, October.
    3. Yawen Zhao & Guanghui Wu & Yintao Zhang & Nicola Scarselli & Wei Yan & Chong Sun & Jianfa Han, 2023. "The Strike-Slip Fault Effects on Tight Ordovician Reef-Shoal Reservoirs in the Central Tarim Basin (NW China)," Energies, MDPI, vol. 16(6), pages 1-14, March.
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    Cited by:

    1. Kaijun Tong & Juan He & Peiyuan Chen & Changyong Li & Weihua Dai & Futing Sun & Yi Tong & Su Rao & Jing Wang, 2024. "Key Technologies for the Efficient Development of Thick and Complex Carbonate Reservoirs in the Middle East," Energies, MDPI, vol. 17(18), pages 1-20, September.
    2. Bo Liu & Fengying Yang & Guangzhi Zhang & Longfei Zhao, 2024. "Pre-Stack Fracture Prediction in an Unconventional Carbonate Reservoir: A Case Study of the M Oilfield in Tarim Basin, NW China," Energies, MDPI, vol. 17(9), pages 1-20, April.

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