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The Strike-Slip Fault Effects on Tight Ordovician Reef-Shoal Reservoirs in the Central Tarim Basin (NW China)

Author

Listed:
  • Yawen Zhao

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
    Tarim Oilfield Company, PetroChina, Korla 841000, China)

  • Guanghui Wu

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

  • Yintao Zhang

    (Tarim Oilfield Company, PetroChina, Korla 841000, China)

  • Nicola Scarselli

    (Fault Dynamics Research Group, Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EX, UK)

  • Wei Yan

    (Tarim Oilfield Company, PetroChina, Korla 841000, China
    PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China)

  • Chong Sun

    (Tarim Oilfield Company, PetroChina, Korla 841000, China)

  • Jianfa Han

    (Tarim Oilfield Company, PetroChina, Korla 841000, China)

Abstract

The largest carbonate condensate field in China has been found in the central Tarim Basin. Ordovician carbonate reservoirs are generally attributed to reef-shoal microfacies along a platform margin. However, recent production success has been achieved along the NE-trending strike-slip fault zones that intersect at the platform margin. For this contribution, we analyzed the strike-slip fault effects on the reef-shoal reservoirs by using new geological, geophysical, and production data. Seismic data shows that some NE-trending strike-slip faults intersected the NW-trending platform margin in multiple segments. The research indicated that the development of strike-slip faults has affected prepositional landforms and the subsequent segmentation of varied microfacies along the platform margin. In addition, the strike-slip fault compartmentalized the reef-shoal reservoirs into multiple segments along the extent of the platform margin. We show that fractured reef-shoal complexes are favorable for the development of dissolution porosity along strike-slip fault damage zones. In the tight matrix reservoirs (porosity < 6%, permeability < 0.5 mD), the porosity and permeability could be increased by more than 2–5 times and to 1–2 orders of magnitude in the fault damage zone, respectively. This suggests that high production wells are correlated with “sweet spots” of fractured reservoirs along the strike-slip fault damage zones, and that the fractured reservoirs in the proximity of strike-slip fault activity might be a major target for commercial exploitation of the deep Ordovician tight carbonates.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:6:p:2575-:d:1091907
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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. Qingsong Tang & Shuhang Tang & Bing Luo & Xin Luo & Liang Feng & Siyao Li & Guanghui Wu, 2022. "Seismic Description of Deep Strike-Slip Fault Damage Zone by Steerable Pyramid Method in the Sichuan Basin, China," Energies, MDPI, vol. 15(21), pages 1-13, October.
    4. Long Wen & Qi Ran & Weizhen Tian & Han Liang & Yuan Zhong & Yu Zou & Chen Su & Guanghui Wu, 2022. "Strike-Slip Fault Effects on Diversity of the Ediacaran Mound-Shoal Distribution in the Central Sichuan Intracratonic Basin, China," Energies, MDPI, vol. 15(16), pages 1-12, August.
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    Cited by:

    1. Bing He & Yicheng Liu & Chen Qiu & Yun Liu & Chen Su & Qingsong Tang & Weizhen Tian & Guanghui Wu, 2023. "The Strike-Slip Fault Effects on the Ediacaran Carbonate Tight Reservoirs in the Central Sichuan Basin, China," Energies, MDPI, vol. 16(10), pages 1-12, May.
    2. 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.

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