利用分子动力学模拟研究页岩吸附能力的影响因素及微观机理的综述  

Review on influencing factors and microscopic mechanism of shale adsorption capacity by molecular dynamics simulation

作　　者：丛奇 陈君青 卢贵武[1,3] 姜福杰 庞礴[4] 施砍园 杨晓斌 王玉莹 庞宏 CONG Qi;CHEN Junqing;LU Guiwu;JIANG Fujie;PANG Bo;SHI Kanyuan;YANG Xiaobin;WANG Yuying;PANG Hong(College of Science,China University of Petroleum,Beijing 102249,China;Energy Interdisciplinary Basic Research Center,Beijing 102249,China;Key Laboratory of Oil and Gas Optical Detection Technology,Beijing 102249,China;College of Geosciences,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)理学院,北京102249 [2]能源交叉学科基础研究中心,北京102249 [3]油气光学探测技术重点实验室,北京102249 [4]中国石油大学(北京)地球科学学院,北京102249

出　　处：《中南大学学报（自然科学版）》2022年第9期3474-3489,共16页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(42102145,U19B6003-02);中国石油大学(北京)“青年拔尖人才培育计划”项目(2462020BJRC005)。

摘　　要：页岩气主要以吸附态和游离态赋存于页岩孔隙中,其吸附态难以开采,因此探究影响页岩吸附能力的影响因素对我国的页岩气勘探和开发具有重要意义。目前,在页岩储层润湿性和孔渗等方面,利用分子动力学模拟技术研究影响页岩吸附能力的机理还不够深入,需进一步完善。本文介绍研究页岩吸附能力的3种主要手段及其优缺点,分析前人利用分子动力学模拟的手段研究页岩吸附能力的参数和表征方法,并揭示不同的影响因素对页岩吸附能力的影响微观机理。温度、压力和流体特征为外在影响因素,而孔隙结构、有机质类型、有机质成熟度和黏土矿物类型等为内在影响因素,有机质类型、成熟度和黏土矿物类型等因素在分子模拟中可用不同页岩基质表面来体现。本文主要阐述利用分子模拟技术,从分子尺度研究页岩吸附能力的表征手段和影响因素并揭示其吸附机理,弥补了其他研究手段的不足,为页岩“甜点”优选以及提高我国未来油气勘探效率提供了理论基础。Shale gas mainly exists in shale pores in adsorbed and free states,and adsorbed state is difficult to be exploited.Therefore,it is of great significance to explore the factors affecting shale adsorption capacity for shale gas exploration and development in China.The current study of molecular dynamics simulation technology in the wettability of shale reservoirs and porosity and permeability of shale adsorption capacity and mechanism research is not deep enough,and need to be further improved.Three main methods of studying shale adsorption capacity and their advantages and disadvantages were introduced.The parameters and characterization methods of shale adsorption capacity studied by predecessors by means of molecular dynamics simulation were analyzed,and the micro mechanism of different influencing factors on shale adsorption capacity were revealed.Among them,temperature,pressure and fluid characteristics are external factors,while pore structure,organic matter type,organic matter maturity and clay mineral type are internal factors.Organic matter type,maturity and clay minerals type can be reflected on the surface of different shale matrix in molecular simulation.This paper mainly expounds the use of molecular simulation technology to study the characterization means and influencing factors of shale adsorption capacity from the molecular scale,and reveals its adsorption mechanism.It overcomes the shortcomings of other research methods,and provides an important theoretical basis for shale dessert optimization and improves the efficiency of future oil and gas exploration in China.

关 键 词：页岩气 吸附能力 分子动力学模拟 微观机理 

分 类 号：P51[天文地球—地质学]