Petroleum Science >2020, Issue 3: 1- DOI: https://doi.org/10.1007/s12182-020-00432-2
The construction of shale rock physics model and brittleness prediction for high-porosity shale gas-bearing reservoir Open Access
文章信息
作者:Xin-Peng Pan, Guang-Zhi Zhang & Jiao-Jiao Chen
作者单位:
Affiliations
School of Geoscience and Info-Physics, Central South University, Changsha, 410082, Hunan, China
Xin-Peng Pan
School of Geoscience, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
Xin-Peng Pan, Guang-Zhi Zhang & Jiao-Jiao Chen
Corresponding author
Correspondence to Guang-Zhi Zhang.
投稿时间:2020-3-24
引用方式:Pan, X., Zhang, G. & Chen, J. The construction of shale rock physics model and brittleness prediction for high-porosity shale gas-bearing reservoir. Pet. Sci. 17, 658–670 (2020). https://doi.org/10.1007/s12182-020-00432-2
文章摘要
Due to the huge differences between the unconventional shale and conventional sand reservoirs in many aspects such as the types and the characteristics of minerals, matrix pores and fluids, the construction of shale rock physics model is significant for the exploration and development of shale reservoirs. To make a better characterization of shale gas-bearing reservoirs, we first propose a new but more suitable rock physics model to characterize the reservoirs. We then use a well A to demonstrate the feasibility and reliability of the proposed rock physics model of shale gas-bearing reservoirs. Moreover, we propose a new brittleness indicator for the high-porosity and organic-rich shale gas-bearing reservoirs. Based on the parameter analysis using the constructed rock physics model, we finally compare the new brittleness indicator with the commonly used Young’s modulus in the content of quartz and organic matter, the matrix porosity, and the types of filled fluids. We also propose a new shale brittleness index by integrating the proposed new brittleness indicator and the Poisson’s ratio. Tests on real data sets demonstrate that the new brittleness indicator and index are more sensitive than the commonly used Young’s modulus and brittleness index for the high-porosity and high-brittleness shale gas-bearing reservoirs.
关键词
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Shale gas;Rock physics model;Brittleness prediction