西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (4): 136-144.DOI: 10.11885/j.issn.16745086.2015.12.24.04

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Progress and Trends in Shale Gas Seepage Mechanism Research

DU Dianfa1, ZHAO Yanwu1, ZHANG Jing1, LIU Changli2, TANG Jianxin2   

  1. 1. College of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China;
    2. East China Company of Sinopec, Nanjing, Jiangsu 210000, China
  • Received:2015-12-24 Revised:2017-05-14 Online:2017-08-01 Published:2017-08-01

Abstract: The flow of shale gas in complex porous space is a typical case of multi-scale and multi-field coupled flow. Studying shale gas seepage mechanisms helps to reveal the mechanism for fluid migration in shale gas reservoirs, and lays a theoretical foundation for the establishment of a mathematical model, development of numerical simulations, and evaluation and prediction of future yields. Based on a literature review from China and abroad combined with recent work, we summarized current research in the field from two perspectives:1) experimentally, in terms of pore structure characteristics of shale, adsorption desorption patterns, shale gas content tests, stress sensitivity, and reservoir fluid migration and 2) theoretically, in terms of micro-flow mechanism simulations, such as molecular dynamics, direct simulation Monte Carlo, and lattice Boltzmann. The progress in the research on shale gas seepage mechanism are also described. The following areas are envisioned as the future direction of research:the influence of gas adsorption on the percolation pattern, fabrication of experimental devices to evaluate shale gas multi-scale media flow mechanisms, and experimental and theoretical studies of shale gas reservoir gas-water two-phase flow.

Key words: shale gas, seepage mechanism, molecular dynamics, lattice Boltzmann, gas-water two-phase

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