不同吸附性气体抽采过程中煤储层参数演化特征研究

doi:10.16285/j.rsm.2017.06.013

›› 2017, Vol. 38 ›› Issue (6): 1647-1656.doi: 10.16285/j.rsm.2017.06.013

不同吸附性气体抽采过程中煤储层参数演化特征研究

许江¹，刘龙荣¹，彭守建¹，冯丹¹，苏小鹏¹，张兰^{1, 2}

1. 重庆大学煤矿灾害动力学与控制国家重点试验室，重庆 400030；2. 中煤科工集团重庆研究院有限公司，重庆 400037

收稿日期:2015-10-16 出版日期:2017-06-12 发布日期:2018-06-05
作者简介:许江，男，1960年生，教授，博士生导师，主要从事岩石力学与工程方面的教学与研究工作
基金资助:
国家自然科学基金（No.51474040；No.51434003；No.51304255）。

Evolution characteristics of coal reservoir parameters in different adsorption gas extraction process

XU Jiang¹, LIU Long-rong¹, PENG Shou-jian¹, FENG Dan¹, SU Xiao-peng¹, ZHANG Lan^{1, 2}

1. State Key Laboratory of Coal Mine Disaster Dynamics and Control，Chongqing University, Chongqing 400030, China; 2. Chongqing Research Institute of China Coal Technology and Engineering Group, Chongqing 400037, China

Received:2015-10-16 Online:2017-06-12 Published:2018-06-05
Supported by:
This work was supported by the National Natural Science Foundation of China (51474040, 51434003 and 51304255).

摘要/Abstract

摘要： 利用自主研发的多场耦合煤层瓦斯抽采物理模拟试验系统，开展了不同吸附性气体抽采的物理模拟试验，探讨了煤层瓦斯抽采过程中煤储层气压、温度及煤层变形等参数的时空演化规律。结果表明：（1）煤储层气压在抽采前期下降较快并形成以钻孔为中心的气压等值面，距离抽采钻孔越远的区域煤层瓦斯流速越小，气压下降速率越低；（2）气体吸附性越强，抽采过程中的煤储层气压下降速率越低且持续时间越长；（3）煤储层温度的时间演化规律与气压基本一致，在抽采前期有显著的降低，在抽采后期受吸附态气体解吸吸热及热交换作用的影响，煤层温度出现先下降后小幅上升；（4）距离钻孔越近的区域气压下降量越大，煤层温度下降越明显，煤层所受有效应力越大，煤层变形量也越大；（5）抽采气体的吸附性越大，抽采所导致的煤层变形量越大。

关键词: 瓦斯抽采, 渗透特性, 煤储层参数, 物理模拟

Abstract: A self-developed multi-field coupling physical simulation testing system was employed to investigate the gas pressure, coal temperature, the deformation and other parameters evolution characteristics of coal reservoir during the process of extracting different adsorption gas. The results demonstrate that the gas pressure of coal reservoir decreased rapidly at the early stage of extraction, and formed a gas pressure equivalent plane with the center of the drill hole. The gas flow rate and pressure drop rate declined with the increase of distance. The stronger ability of adsorption, the lower the gas pressure drop rate and the longer the duration. The time evolution law of coal reservoir temperature and the time evolution law of gas pressure were consistent. Coal reservoir temperature decreased significantly at the early stage. At the late stage of extraction, under the influence of desorption of the adsorbed gas and heat exchange, the coal bed temperature appeared to decrease initially and then increase slightly. The closer position from extraction drill hole, the greater the pressure drop, the more obvious the coal bed temperature decreased and the greater the amount of coal deformation. The stronger the ability of adsorption is, the greater the deformation of the coal caused by gas extraction.

Key words: gas extraction, permeability, coal reservoir parameters, physical modeling

中图分类号:

TD 712.6

许江，刘龙荣，彭守建，冯丹，苏小鹏，张兰, . 不同吸附性气体抽采过程中煤储层参数演化特征研究[J]. , 2017, 38(6): 1647-1656.

XU Jiang, LIU Long-rong, PENG Shou-jian, FENG Dan, SU Xiao-peng, ZHANG Lan, . Evolution characteristics of coal reservoir parameters in different adsorption gas extraction process[J]. , 2017, 38(6): 1647-1656.

参考文献

相关文章 15

[1]	刘华, 何江涛, 赵茜, 王铁行, 郭超翊, . 酸污染原状黄土渗透微观特征演变规律试验研究[J]. 岩土力学, 2020, 41(3): 765-772.
[2]	彭守建, 郭世超, 许江, 郭臣业, 张超林, 贾立, . 采动诱导应力集中对顺层钻孔瓦斯抽采影响的试验研究[J]. 岩土力学, 2019, 40(S1): 99-108.
[3]	王冲, 胡大伟, 任金明, 周辉, 卢景景, 刘传新, . 侵蚀性环境对地下结构渗透和力学特性影响研究[J]. 岩土力学, 2019, 40(9): 3457-3464.
[4]	莫振泽, 王梦恕, 李海波, 钱勇进, 罗跟东, 王辉, . 粉砂地层中浓泥土压盾构泥膜效应引起的孔压变化规律试验研究[J]. 岩土力学, 2019, 40(6): 2257-2263.
[5]	许江, 宋肖徵, 彭守建, 张超林, 李奇贤, 张小蕾, . 顺层钻孔布置间距对煤层瓦斯抽采效果影响的物理模拟试验研究[J]. 岩土力学, 2019, 40(12): 4581-4589.
[6]	赵建军，余建乐，解明礼，柴贺军，李涛，步凡，蔺冰，. 降雨诱发填方路堤边坡变形机制物理模拟研究[J]. , 2018, 39(8): 2933-2940.
[7]	张天军，尚宏波，李树刚，魏文伟，包若羽，潘红宇，. 三轴应力下不同粒径破碎砂岩渗透特性试验[J]. , 2018, 39(7): 2361-2370.
[8]	唐然，许强，吴斌，范宣梅，. 平推式滑坡运动距离计算模型[J]. , 2018, 39(3): 1009-1019.
[9]	许江，苏小鹏，彭守建，刘义鑫，冯丹，刘龙荣, . 卸压区不同钻孔长度抽采条件下瓦斯运移特性试验[J]. , 2018, 39(1): 103-111.
[10]	蒋毅，魏思宇，尚彦军，高强，李严严,. 深部复合地层力学性质研究[J]. , 2017, 38(S2): 266-272.
[11]	曹洪，肖莹萍 , . 渗透变形过程中临空面表层土体渗透特性变化试验研究[J]. , 2017, 38(9): 2465-2472.
[12]	张庆贺，王汉鹏，李术才，薛俊华，张冰，朱海洋，张德民，. 煤与瓦斯突出物理模拟试验中甲烷相似气体的探索[J]. , 2017, 38(2): 479-486.
[13]	张超林，彭守建，许江，耿加波，杨红伟，罗小航, . 煤与瓦斯突出过程中气压时空演化规律[J]. , 2017, 38(1): 81-90.
[14]	马耕，张帆，刘晓，冯丹，张鹏伟，. 地应力对破裂压力和水力裂缝影响的试验研究[J]. , 2016, 37(S2): 216-222.
[15]	张志红，李红艳，陈家煜，雷墉. 混合重金属离子侵蚀饱和黏性土渗透特性试验研究[J]. , 2016, 37(9): 2467-2476.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

不同吸附性气体抽采过程中煤储层参数演化特征研究

Evolution characteristics of coal reservoir parameters in different adsorption gas extraction process

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0