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Impacts of the Base-Level Cycle on Pore Structure of Mouth Bar Sand Bars: A Case Study of the Paleogene Kongdian Formation, Bohai Bay Basin, China

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  • Xixin Wang

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

  • Jiagen Hou

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

  • Yuming Liu

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

  • Ling Ji

    (CNPC Da Gang Oilfield, Tianjin 061100, China)

  • Jian Sun

    (CNPC Da Gang Oilfield, Tianjin 061100, China)

  • Xun Gong

    (CNPC Da Gang Oilfield, Tianjin 061100, China)

Abstract

The pore structure of rocks can affect fluid migration and the remaining hydrocarbon distribution. To understand the impacts of the base-level cycle on the pore structure of mouth bar sand bodies in a continental rift lacustrine basin, the pore structure of the mouth bar sand bodies in the ZVC (ZV4 + ZV5) of the Guan195 area was studied using pressure-controlled mercury injection (PMI), casting sheet image and scanning electron microscopy (SEM). The results show that three types of pores exist in ZVC, including intergranular pores, dissolution pores, and micro fractures. The porosity is generally between 1.57% and 44.6%, with a mean value of 19.05%. The permeability is between 0.06 μm 2 and 3611 μm 2 , with a mean value of 137.56 μm 2 . The pore structure heterogeneity of a single mouth bar sand body in the early stage of the falling period of short-term base-level is stronger than that in the late stage. During the falling process of the middle-term base level, the pore structure heterogeneity of a late single mouth bar sand body is weaker than that of an early single mouth bar sand body. In the long-term base-level cycle, the pore structure heterogeneity of mouth bar sand bodies becomes weaker with the falling of the base-level.

Suggested Citation

  • Xixin Wang & Jiagen Hou & Yuming Liu & Ling Ji & Jian Sun & Xun Gong, 2018. "Impacts of the Base-Level Cycle on Pore Structure of Mouth Bar Sand Bars: A Case Study of the Paleogene Kongdian Formation, Bohai Bay Basin, China," Energies, MDPI, vol. 11(10), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2617-:d:173163
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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.
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    Cited by:

    1. Jianchao Cai & Shuyu Sun & Ali Habibi & Zhien Zhang, 2019. "Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow," Energies, MDPI, vol. 12(2), pages 1-5, January.

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