Research on the Shale Porosity–TOC Maturity Relationship Based on an Improved Pore Space Characterization Method

Jianbin Zhao, Shizhen Ke (), Weibiao Xie (), Zhehao Zhang, Bo Wei, Jinbin Wan, Daojie Cheng, Zhenlin Li and Chaoqiang Fang
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Jianbin Zhao: College of Geophysics, China University of Petroleum, Beijing 102249, China
Shizhen Ke: College of Geophysics, China University of Petroleum, Beijing 102249, China
Weibiao Xie: School of Petroleum, China University of Petroleum, Karamay 834000, China
Zhehao Zhang: China Petroleum Logging Co., Ltd., Xi’an 710000, China
Bo Wei: China Petroleum Logging Co., Ltd., Xi’an 710000, China
Jinbin Wan: China Petroleum Logging Co., Ltd., Xi’an 710000, China
Daojie Cheng: China Petroleum Logging Co., Ltd., Xi’an 710000, China
Zhenlin Li: China Petroleum Logging Co., Ltd., Xi’an 710000, China
Chaoqiang Fang: China Petroleum Logging Co., Ltd., Xi’an 710000, China

Energies, 2024, vol. 17, issue 5, 1-14

Abstract: Shale pore structure characterization is key to shale reservoir evaluation, sweet spot selection, and economic exploitation. It remains a challenge to accurately characterize shale micro-nano pores. Common experimental characterization methods for shale pore systems are listed, and advantages and weaknesses of each method are analyzed. An improved pore structure characterization method for shale is proposed by combining Helium and NMR. The new method does not affect shale samples and has a higher accuracy. The affecting factors for shale pore evolution for shale are also discussed, showing that organic matter content and maturity are key factors in total porosity development. Furthermore, a shale porosity–TOC maturity relationship chart is developed based on the experimental data of shale samples selected from six shale reservoirs. The application of this chart in Well X in the Gulong field of Songliao Basin proves its utility in evaluating shale reservoirs.

Keywords: shale; pore evolution; organic matter; pore structure; logging evaluation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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