[1]索永录,刘颖凯,肖 江,等.废弃石油井周围煤层中油层气扩散-渗流规律[J].西安科技大学学报,2019,(05):753-760.[doi:10.13800/j.cnki.xakjdxxb.2019.0503]
 SUO Yong-lu,LIU Ying-kai,XIAO Jiang,et al.Diffusion-seepage law of oil-bed gas in coal seam around abandoned oil well[J].Journal of Xi’an University of Science and Technology,2019,(05):753-760.[doi:10.13800/j.cnki.xakjdxxb.2019.0503]
点击复制

废弃石油井周围煤层中油层气扩散-渗流规律(/HTML)
分享到:

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2019年05期
页码:
753-760
栏目:
出版日期:
2019-10-25

文章信息/Info

Title:
Diffusion-seepage law of oil-bed gas in coal seam around abandoned oil well
文章编号:
1672-9315(2019)05-0753-08
作者:
索永录12刘颖凯1肖 江12张 刚13李 凡1曲慧升1
(1.西安科技大学 能源学院,陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054; 3.神华宁夏煤业集团 双马煤矿,宁夏 银川 750011)
Author(s):
SUO Yong-lu12LIU Ying-kai1XIAO Jiang12ZHANG Gang13LI Fan1QU Hui-sheng1
关键词:
废弃石油井 油层气 扩散-渗流 数值模拟 影响半径
Keywords:
abandoned oil well oil-bed gas diffusion-seepage numerical simulation influence radius
分类号:
TD 712
DOI:
10.13800/j.cnki.xakjdxxb.2019.0503
文献标志码:
A
摘要:
为揭示煤矿废弃石油井周围煤层内油层气流动的压力与影响半径的变化规律,基于煤体孔隙裂隙二重介质假设,考虑孔隙率与渗透率动态变化,结合煤体变形特征,建立了油层气流动的扩散-渗流耦合模型,针对油层气组分的特殊性,运用COMSOL Multiphysics软件进行模拟计算。结果表明:流动过程中,煤层各处油层气压力的增加速度都先加快后减慢直至趋于稳定,距离废弃石油井越近,油层气压力短时间内变化越快,压力也越大; 随着时间的推移,油层气影响半径逐渐增加,最后趋于稳定,井内压力恒定时,影响半径增加速度一直衰减,井内压力线性增加时,影响半径增加速度先增后减; 第30年时,当井内压力线性增加至15 MPa时,影响半径为310 m.模拟结果与现场实测结果基本吻合,说明该耦合模型合理,该研究为受废弃石油井威胁的煤层的安全高效开采提供理论指导。
Abstract:
In order to reveal the changing laws of the pressure and influence radius of the oil-bed gas flowing in the coal seam around the abandoned oil wells in coal mines,based on the hypothesis of dual-porous media,the diffusion-seepage coupling model of oil-bed gas flow was established withthe dynamic changes of porosity and permeability as well as the deformation characteristics of coal in mind.The coupling model with the specificity of oil-bed gas composition was simulated by COMSOL Multiphysics software.The results shows that:during the flow,the increase rate of the oil-bed gas pressure in the coal seam accelerates first,then slows down until it stabilizes.The closer to the abandoned oil well,the faster the pressure changes in a short time and the greater the pressure is.As time went on,the influence radius gradually increases,and finally stabilizes.The increase speed of influence radius has attenuated when the pressure in the well is constant while it increases first and then decreases when the pressure in the well increases linearly.At 30 years,when the pressure in the well increases linearly to 15 MPa,the influence radius will be 310 m.The simulation results are roughly consistent with the reality.So this coupling model is proved to be right.This study provides a theoretical guidance for safe and efficient mining in the coal seam threatened by abandoned oil wells.

参考文献/References:

[1] 张 健.子长矿区煤油地质特征及合理开发对策研究[D].西安:西安科技大学,2013.ZHANG Jian.The research on the coal and petroleum geological features and the reasonable development countermeasures in Zichang mining area[D].Xi’an:Xi’an University of Science and Technology,2013.[2] 张 荃.黄陵油型气涌出矿井CH4扩散规律数值模拟[D].西安:西安科技大学,2015.ZHANG Quan.Numerical simulation of CH4 diffusion regularities in the coalmine of Huangling with oil-type gas emission[D].Xi’an:Xi’an University of Science and Technology,2015.[3]孙四清.煤油气共存矿井掘进工作面底板油型气涌出机理探讨[J].矿业安全与环保,2017,44(4):90-94.SUN Si-qing.Discussion on oil-type gas emission mechanism from heading face floor in coal-oil-gas coexisting mine[J].Mining Safety & Environmental Protection,2017,44(4):90-94.[4]张俭让,张 荃,董丁稳,等.掘进巷道油型气扩散规律数值模拟[J].西安科技大学学报,2015,35(3):307-312.ZHANG Jian-rang,ZHANG Quan,DONG Ding-wen,et al.Numerical simulation of oil-type gas diffusion regularities in roadway excavation[J].Journal of Xi’an University of Science and Technology,2015,35(3):307-312.[5]朱扬明,王积宝,郝 芳,等.川东宣汉地区天然气地球化学特征及成因[J].地质科学,2008(3):518-532.ZHU Yang-ming,WANG Ji-bao,HAO Fang,et al.Geochemical characteristics and origin of natural gases from Xuanhan area in Eastern Sichuan[J].Chinese Journal of Geology,2008(3):518-532.[6]金之钧,张发强.油气运移研究现状及主要进展[J].石油与天然气地质,2005(3):263-270.JIN Zhi-jun,ZHANG Fa-qiang.Current status and main progress of oil and gas migration[J].Oil & Gas Geology,2005(3):263-270.[7]李明诚.石油与天然气运移研究综述[J].石油勘探与开发,2000(4):3-10,109-117.LI Ming-cheng.Summary of research on oil and gas migration[J].Petroleum Exploration and Development,2000(4):3-10,109-117.[8]杨其銮.煤屑瓦斯扩散理论及其应用[J].煤炭学报,1986,11(3):67-70.YANG Qi-luan.Diffusion theory and application of methane in coal seam[J].Journal of China Coal Society,1986,11(3):67-70.[9]Wu D M,Wang H F,Ge C G,et al.Research on forced gas draining from coal seams by surface well drilling[J].Mining Science and Technology,2011,21(2):229-232.[10]鲜学福,张广祥,谭学术,等.煤层瓦斯运移数学模型[J].重庆大学学报,1994,17(4):53-64.XIAN Xue-fu,ZHANG Guang-xiang,TAN Xue-shu,et al.Mathematical model of methane transport in coal seam[J].Journal of Chongqing University,1994,17(4):53-64.[11]李 波.受载含瓦斯煤渗流特性及其应用研究[D].北京:中国矿业大学(北京),2013.LI Bo.Seepage characteristics of loaded coal containing gas and its application[D].Beijing:China University of Mining & Technology(Beijing),2013.[12]周世宁.瓦斯在煤层中流动的机理[J].煤炭学报,1990,15(1):61-74.ZHOU Shi-ning.Mechanism of methane flow in coal seam[J].Journal of China Coal Society,1990,15(1):61-74.[13]周世宁,孙辑正.煤层瓦斯流动理论及其应用[J].煤炭学报,1965,2(1):24-36.ZHOU Shi-ning,SUN Ji-zheng.Theory and application of methane flow in coal seam[J].Journal of China Coal Society,1965,2(1):24-36.[14]赵阳升.煤体-瓦斯耦合数学模型及数值解法[J].岩石力学与工程学报,1994,13(3):229-239.ZHAO Yang-sheng.Coupled mathematical model on coal mass-methane and its numerical method[J].Chinese Journal of Rock Mechanics and Engineering,1994,13(3):229-239.[15]石军太,李相方,徐兵祥,等.煤层气解吸扩散渗流模型研究进展[J].中国科学:物理学天文学力学,2013,43(12):1548-1557.SHI Jun-tai,LI Xiang-fang,XU Bing-xiang,et al.Review on desorption-diffusion-flow model of coal-bed methane[J].Sci Sin-Phys Mech Astron,2013,43(15):1548-1557.[16]吴世跃.煤层气与煤层耦合运动理论及其应用的研究[D].沈阳:东北大学,2006.WU Shi-yue.Research of methane-coalbed coupling movement theory and its application[D].Shenyang:Northeastern University,2006.[17]郭 平,曹树刚,张遵国,等.煤体吸附膨胀变形模型理论研究[J].岩石力学,2014,35(12):3467-3472.GUO Ping,CAO Shu-gang,ZHANG Zun-guo,et al.Theoretical study of deformation model of coal swell induced by gas adsorption[J].Rock and Soil Mechanics,2014,35(12):3467-3472.[18]Li B,Wei J P,Li P,Numerical simulation on gas drainage of boreholes in coal seam based on gas-solid coupling model[J].Computer Modelling & New Technologies,2014,18(12A):1-8.[19]林柏泉,刘 厅,杨 威.基于动态扩散的煤层多场耦合模型建立及应用[J].中国矿业大学学报,2018,47(1):32-39.LIN Bo-quan,LIU Ting,YANG Wei.Solid-gas coupling model for coalseams based on dynamic diffusion and its application[J].Journal of China University of Mining and Technology,2018,47(1):32-39.[20]张钧祥.基于扩散-渗流机理瓦斯抽采三维模拟研究[J].地下空间与工程学报,2018,2(1):110-115.ZHANG Jun-xiang.Research on 3D numerical simulation of gas extraction based on diffusion-seepage mechanism[J].Chinese Journal of Underground Space and Engineering,2018,2(1):110-115.[21]魏凯丰,宋少英,张作群.天然气混合气体粘度和雷诺数计算研究[J].计量学报,2008(3):248-250.WEI Kai-feng,SONG Shao-ying,ZHANG Zuo-qun.Research on calculation of natural mix gas viscosity and reynolds number[J].Acta Metrologica Sinica,2008(3):248-250.[22]Jasinge D,Ranjith P G,Choi S K.Effects of effective stress changes on permeability of latrobe valley brown coal[J].Fuel,2011,90(3):1292-1300.[23]张景飞,郭 倩,朱同功,等.多场耦合下煤岩渗透率演化规律——以平煤十矿为例[J].西安科技大学学报,2018,38(5):713-720.ZHANG Jing-fei,GUO Qian,ZHU Tong-gong,et al.Evolution of coal rock permeability with multiphysics coupling:taking Pingmei No.10 mine as an example[J].Journal of Xi’an University of Science and Technology,2018,38(5):713-720.[24]孙光中,荆永滨.加卸载作用下构造煤峰值前渗透率变化特征试验研究[J].西安科技大学学报,2016,36(2):193-199.SUN Guang-zhong,JING Yong-bin.Experimental study on pre-peak permeability of coal samples under axial stress loading and unloading[J].Journal of Xi’an University of Science and Technology,2016,36(2):193-199.

备注/Memo

备注/Memo:
收稿日期:2019-04-28 责任编辑:刘 洁基金项目:国家自然科学基金(51474173,51774229)通信作者:刘颖凯(1993-),男,江西九江人,硕士研究生,E-mail:809302823@qq.com
更新日期/Last Update: 2019-10-25