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Natural Fractures in Carbonate Basement Reservoirs of the Jizhong Sub-Basin, Bohai Bay Basin, China: Key Aspects Favoring Oil Production

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  • Guoping Liu

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
    College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China)

  • Lianbo Zeng

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
    College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China)

  • Chunyuan Han

    (PetroChina Huabei Oilfield Company, Cangzhou 062552, China)

  • Mehdi Ostadhassan

    (Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND 58202, USA)

  • Wenya Lyu

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
    College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China)

  • Qiqi Wang

    (Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78713, USA)

  • Jiangwei Zhu

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
    College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China)

  • Fengxiang Hou

    (PetroChina Huabei Oilfield Company, Cangzhou 062552, China)

Abstract

Analysis of natural fractures is essential for understanding the heterogeneity of basement reservoirs with carbonate rocks since natural fractures significantly control key attributes such as porosity and permeability. Based on the observations and analyses of outcrops, cores, borehole image logs, and thin sections from the Mesoproterozoic to Lower Paleozoic in the Jizhong Sub-Basin, natural fractures are found to be abundant in genetic types (tectonic, pressure-solution, and dissolution) in these reservoirs. Tectonic fractures are dominant in such reservoirs, and lithology, mechanical stratigraphy, and faults are major influencing factors for the development of fractures. Dolostones with higher dolomite content are more likely to have tectonic fractures than limestones with higher calcite content. Most tectonic fractures are developed inside mechanical units and terminate at the unit interface at nearly perpendicular or high angles. Also, where a thinner mechanical unit is observed, tectonic fractures are more frequent with a small height. Furthermore, the dominant direction of tectonic fractures is sub-parallel to the fault direction or oblique at a small angle. In addition, integrating diverse characteristics of opening-mode fractures and well-testing data with oil production shows that, in perforated intervals where dolostone and limestone are interstratified or dolostone is the main lithologic composition, fractures are developed well, and the oil production is higher. Moreover, fractures with a larger dip angle have bigger apertures and contribute more to oil production. Collectively, this investigation provides a future reference for understanding the importance of natural fractures and their impact on oil production in the carbonate basement reservoirs.

Suggested Citation

  • Guoping Liu & Lianbo Zeng & Chunyuan Han & Mehdi Ostadhassan & Wenya Lyu & Qiqi Wang & Jiangwei Zhu & Fengxiang Hou, 2020. "Natural Fractures in Carbonate Basement Reservoirs of the Jizhong Sub-Basin, Bohai Bay Basin, China: Key Aspects Favoring Oil Production," Energies, MDPI, vol. 13(18), pages 1-23, September.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4635-:d:409772
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    References listed on IDEAS

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    1. Lei Gong & Xiaofei Fu & Shuai Gao & Peiqiang Zhao & Qingyong Luo & Lianbo Zeng & Wenting Yue & Benjian Zhang & Bo Liu, 2018. "Characterization and Prediction of Complex Natural Fractures in the Tight Conglomerate Reservoirs: A Fractal Method," Energies, MDPI, vol. 11(9), pages 1-17, September.
    2. Benmadi Milad & Sayantan Ghosh & Roger Slatt & Kurt Marfurt & Mashhad Fahes, 2020. "Practical Aspects of Upscaling Geocellular Geological Models for Reservoir Fluid Flow Simulations: A Case Study in Integrating Geology, Geophysics, and Petroleum Engineering Multiscale Data from the H," Energies, MDPI, vol. 13(7), pages 1-27, April.
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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. Xin Luo & Siqi Chen & Jiawei Liu & Fei Li & Liang Feng & Siyao Li & Yonghong Wu & Guanghui Wu & Bin Luo, 2023. "The Fractured Permian Reservoir and Its Significance in the Gas Exploitation in the Sichuan Basin, China," Energies, MDPI, vol. 16(4), pages 1-13, February.
    3. Reza Rezaee, 2022. "Editorial on Special Issues of Development of Unconventional Reservoirs," Energies, MDPI, vol. 15(7), pages 1-9, April.
    4. 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.
    5. Rujun Wang & Jianping Yang & Lunjie Chang & Yintao Zhang & Chong Sun & Xiaoguo Wan & Guanghui Wu & Bingchen Bai, 2022. "3D Modeling of Fracture-Cave Reservoir from a Strike-Slip Fault-Controlled Carbonate Oilfield in Northwestern China," Energies, MDPI, vol. 15(17), pages 1-14, September.

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