中煤阶煤层气井排采阶段划分及渗透率变化

doi:10.11885/j.issn.1674-5086.2017.05.08.01

西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (6): 115-123.DOI: 10.11885/j.issn.1674-5086.2017.05.08.01

中煤阶煤层气井排采阶段划分及渗透率变化

夏鹏^1,2, 曾凡桂², 吴婧², 王晋², 冯绍盛²

1. 贵州大学资源与环境工程学院, 贵州贵阳 550025;
2. 太原理工大学矿业工程学院, 山西太原 030024

收稿日期:2017-05-08 出版日期:2018-12-01 发布日期:2018-12-01
通讯作者: 夏鹏,E-mail:xp990691911@163.com
作者简介:夏鹏,1989年生,男,汉族,贵州遵义人,讲师,博士,主要从事石油天然气地质与开发方面的研究。E-mail:xp990691911@163.com;曾凡桂,1965年生,男,汉族,江西赣州人,教授,博士,主要从事煤田及煤系气地质方面的研究。E-mail:m15735162787@163.com;吴婧,1989年生,女,汉族,山西阳泉人,硕士,主要从事煤层气地质与开发方面的研究。E-mail:tywujing2011@sina.com;王晋,1991年生,男,汉族,山西晋城人,硕士,主要从事煤层气地质与开发方面的研究。E-mail:524173264@qq.com;冯绍盛,1993年生,男,汉族,江西九江人,硕士,主要从事煤层气地质与开发方面的研究。E-mail:1141014304@qq.com
基金资助:
贵州省科技计划项目（黔科合平台人才[2017]5788号）；山西省煤基重点科技攻关项目（MQ2014-01）

Division of Different Drainage and Production Stages of Medium-rank Coalbed Methane Wells and the Change in Permeability

XIA Peng^1,2, ZENG Fangui², WU Jing², WANG Jin², FENG Shaosheng²

1. College of Resource and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China;
2. College of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China

Received:2017-05-08 Online:2018-12-01 Published:2018-12-01

摘要/Abstract

摘要：

煤层渗透率动态变化规律是煤层气开发所面临的重点问题之一。根据无因次产气率划分煤层气井排采阶段，结合等温吸附实验下煤层气的解吸过程确定排采阶段分界点位置。通过物质能量动态平衡理论建立中煤阶煤储层渗透率评价模型，从渗透率变化趋势、主导机制、产能动态等方面，阐释了中煤阶煤层气井不同排采阶段煤储层渗透率动态变化特征与控制机理。结果表明，排采过程中，煤储层绝对渗透率发生“先降低—后回返—再上升”的动态变化。排水阶段水相有效渗透率迅速下降，气相有效渗透率为0。储层压力降低至临界解吸压力后进入产气阶段，气相有效渗透率迅速增加，水相有效渗透率缓慢降低。产气量衰减阶段绝对渗透率开始下降，在滑脱效应影响下，气相有效渗透率仍然保持缓慢上升，水相有效渗透率降低。

关键词: 中煤阶, 排采阶段, 渗透率, 动态变化, 产能动态

Abstract:

Understanding the dynamic changing patterns of the permeability of coal seams is one of the key issues in coalbed methane development. In this study, we divided the drainage and production stages of coalbed methane wells according to the non-dimensionalized gas production rate. By combining these figures with the coalbed methane desorption process identified in isothermal adsorption experiments, we further determined the interfacial location between the drainage and production stages. A model for evaluating the permeability of medium-rank coal reservoirs was also developed using the dynamic balance theory of material and energy. Finally, the dynamic characteristics and control mechanisms of coal reservoir permeability in different drainage and production stages of medium-rank coalbed methane wells were explained from multiple perspectives, including the trend of permeability variation, the dominant mechanism, and the productivity dynamics. The results show that the absolute permeability of the coal reservoir experiences a dynamic change of"first decreasing, then reverting, and finally increasing" during the drainage and production processes. A rapid reduction in the effective permeability of water phase and a zero effective permeability of gas phase are observed during the drainage stage. The reservoir enters the gas production stage once the reservoir pressure drops to the critical desorption pressure. During this stage, the effective permeability of gas phase increases rapidly while the effective permeability of the water phase drops slowly. The absolute permeability begins to decrease during the gas production reduction phase. Influenced by the slippage effect, the effective permeability of the gas phase continues to increase slowly while the effective permeability of water phase reduces.

Key words: medium-rank coal, drainage and production stage, permeability, dynamic change, productivity dynamics

中图分类号:

TE37

夏鹏, 曾凡桂, 吴婧, 王晋, 冯绍盛. 中煤阶煤层气井排采阶段划分及渗透率变化[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 115-123.

XIA Peng, ZENG Fangui, WU Jing, WANG Jin, FENG Shaosheng. Division of Different Drainage and Production Stages of Medium-rank Coalbed Methane Wells and the Change in Permeability[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 115-123.

0
/ / 推荐

导出引用管理器 EndNote|Ris|BibTeX

链接本文: http://journal15.magtechjournal.com/Jwk_xnzk/CN/10.11885/j.issn.1674-5086.2017.05.08.01

http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2018/V40/I6/115

参考文献

[1] TAO Shu, TANG Dazhen, XU Hao, et al. Factors controlling high-yield coalbed methane vertical wells in the Fanzhuang Block, Southern Qinshui Basin[J]. International Journal of Coal Geology, 2014, 134-135:38-45. doi:10.1016/j.coal.2014.10.002
[2] TIAN Lin, CAO Yunxing, CHAI Xuezhou, et al. Best practices for the determination of low-pressure/permeability coalbed methane reservoirs, Yuwu Coal Mine, Luan mining area, China[J]. Fuel, 2015, 160:100-107. doi:10.1016/j.fuel.2015.07.082
[3] 周军平,鲜学福,姜永东,等. 考虑有效应力和煤基质收缩效应的渗透率模型[J]. 西南石油大学学报(自然科学版),2009,31(1):4-8. doi:10.3863/j.issn.16745086.2009.01.002 ZHOU Junping, XIAN Xuefu, JIANG Yongdong, et al. A permeability model considering the effective stress and coal matrix shrinking effect[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2009, 31(1):4-8. doi:10.3863/j.issn.1674-5086.2009.01.002
[4] CONNELL L, LU Meng, PAN Zhejun. An analytical coal permeability model for tri-axial strain and stress conditions[J]. International Journal of Coal Geology, 2010, 84(2):103-114. doi:10.1016/j.coal.2010.08.011
[5] HARPALANI S, CHEN G. Influence of gas production induced volumetric strain on permeability of coal[J]. Geotechnical & Geological Engineering, 1997, 15(4):303-325.
[6] PALMER I. Permeability changes in coal:Analytical modeling[J]. International Journal of Coal Geology, 2009, 77(1):119-126. doi:10.1016/j.coal.2008.09.006
[7] 徐宏杰,桑树勋,易同生,等. 黔西地区煤层埋深与地应力对其渗透性控制机制[J]. 地球科学—中国地质大学学报,2014,39(11):1607-1616. doi:10.3799/dqkx.2014.143 XU Hongjie, SANG Shuxun, YI Tongsheng, et al. Control mechanism of buried depth and in-situ stress for coal reservoir permeability in western Guizhou[J]. Earth Science:Journal of China University of Geosciences, 2014, 39(11):1607-1616. doi:10.3799/dqkx.2014.143
[8] FU Xuehai, QIN Yong, WANG G G X, et al. Evaluation of coal structure and permeability with the aid of geophysical logging technology[J]. Fuel, 2009, 88(11):2278-2285. doi:10.1016/j.fuel.2009.05.018
[9] CHEN Yaxi, LIU Dameng, YAO Yanbin, et al. Dynamic permeability change during coalbed methane production and its controlling factors[J]. Journal of Natural Gas Science and Engineering, 2015, 25:335-346. doi:10.1016/j.jngse.2015.05.018
[10] 张培河. 基于生产数据分析的沁水南部煤层渗透性研究[J]. 天然气地球科学, 2010, 21(3):503-507. ZHANG Peihe. Study of permeability of coal seam based on data well production in south Qinshui Basin[J]. Natural Gas Geoscience, 2010, 21(3):503-507.
[11] 莫日和,张芬娜,綦耀光,等. 煤层气井有杆泵内煤粉沉积的影响因素分析[J]. 西南石油大学学报(自然科学版), 2016, 38(5):143-150. doi:10.11885/j.issn.16745086.2014.10.31.05 MO Rihe, ZHANG Fenna, QI Yaoguang, et al. Movement of pulverized coal in sucker rod pump in coalbed methane well[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2016, 38(5):143-150. doi:10.11885/j.issn.1674-5086.2014.10.31.05
[12] 孟召平,张纪星,刘贺,等. 考虑应力敏感性的煤层气井产能模型及应用分析[J]. 煤炭学报, 2014, 39(4):593-599. doi:10.13225/j.cnki.jccs.2013.1780 MENG Zhaoping, ZHANG Jixing, LIU He, et al. Productivity model of CBM wells considering the stress sensitivity and its application analysis[J]. Journal of China Coal Society, 2014, 39(4):593-599. doi:10.13225/j.cnki.jccs.2013.1780
[13] 汤达祯,赵俊龙,许浩,等. 中高煤阶煤层气系统物质能量动态平衡机制[J]. 煤炭学报, 2016, 41(1):40-48. doi:10. 13225/j.cnki.jccs.2015.9009 TANG Dazhen, ZHAO Junlong, XU Hao, et al. Material and energy dynamic balance mechanism in middle-high rank coalbed methane (CBM) systems[J]. Journal of China Coal Society, 2016, 40(1):40-48. doi:10. 13225/j.cnki.jccs.2015.9009
[14] WANG Gang, QIN Yong, XIE Yiwei, et al. The division and geologic controlling factors of a vertical superimposed coalbed methane system in the northern Gujiao blocks, China[J]. Journal of Natural Gas Science and Engineering, 2015, 24:379-389. doi:10.1016/j.jngse.2015.04.005
[15] XIA Peng, ZENG Fangui, SONG Xiaoxia. Parameters controlling high-yield coalbed methane vertical wells in the B3 area, Xishan coal field, Shanxi, China[J]. Energy Exploration & Exploitation, 2016, 34(5):711-734. doi:10.1177/0144598716656066
[16] 逄建东,汪雷,臧晓琳,等. 古交地区煤层气地质条件及资源潜力分析[J]. 科学技术与工程, 2015, 15(33):155-160, 165. doi:10.3969/j.issn.1671-1815.2015.33.027 PANG Jiandong, WANG Lei, ZANG Xiaolin, et al. The geological conditions and resource potential analysis of coal bed gas in Gujiao area[J]. Science Technology and Engineering, 2015, 15(33):155-160, 165. doi:10.3969/j.issn.1671-1815.2015.33.027
[17] 倪小明,苏现波,张小东. 煤层气开发地质学[M]. 北京:化学工业出版社, 2010.
[18] 秦义,李仰民,白建梅,等. 沁水盆地南部高煤阶煤层气井排采工艺研究与实践[J]. 天然气工业,2011,31(11):22-25. doi:10.3787/j.issn.1000-0976.2011.11.006 QIN Yi, LI Yangmin, BAI Jianmei, et al. Technologies in the CBM drainage and production of wells in the southern Qinshui basin with high-rank coal beds[J]. Natural Gas Industry, 2011, 31(11):22-25. doi:10.3787/j.issn.10000976.2011.11.006
[19] 孟艳军,汤达祯,李治平,等. 高煤阶煤层气井不同排采阶段渗透率动态变化特征与控制机理[J]. 油气地质与采收率, 2015, 22(2):66-71. doi:10.3969/j.issn.10099603.2015.02.012 MENG Yanjun, TANG Dazhen, LI Zhiping, et al. Dynamic variation characteristics and mechanism of permeability in high-rank CBM wells at different drainage and production stages[J]. Petroluem Geology and Recovery Efficiency, 2015, 22(2):66-71. doi:10.3969/j.issn.10099603.2015.02.012
[20] 张政,秦勇, WANG Guoxiong,等. 基于等温吸附实验的煤层气解吸阶段数值描述[J]. 中国科学:地球科学, 2013, 43(8):1352-1358. ZHANG Zheng, QIN Yong, WANG Guoxiong, et al. Numerical description of coalbed methane desorption stages based on isothermal adsorption experiment[J]. Science China Earth Sciences, 2013, 43(8):1352-1358.
[21] MENG Yanjun, TANG Dazhen, XU Hao, et al. Division of coalbed methane desorption stages and its significance[J]. Petroleum Exploration and Development, 2014, 41(5):671-677. doi:10.1016/S1876-3804(14)60080-X
[22] MA Feiying, WANG Yongqing, LI Haitao, et al. Staged coalbed methane desorption and the contribution of each stage to productivity[J]. Chemistry and Technology of Fuels and Oils, 2014, 50(5):448-448. doi:10.1007/s10553014-0531-3
[23] PALMER I. Coalbed methane completions:A world view[J]. International Journal of Coal Geology, 2010, 82(3):184-195. doi:10.1016/j.coal.2009.12.010
[24] ALEXIS D A, KARPYN Z T, ERTEKIN T, et al. Fracture permeability and relative permeability of coal and their dependence on stress conditions[J]. Journal of Unconventional Oil and Gas Resources, 2015, 10:1-10. doi:10.1016/j.juogr.2015.02.001
[25] HAM Y, KANTZAS A. Measurement of relative permeability of coal:Approaches and limitations[C]. SPE 114994, 2008. doi:10.2118/114994-MS
[26] 崔玉峰,王贵文,孙艳慧,等. 低孔低渗储层物性下限确定方法及其适用性[J]. 西南石油大学学报(自然科学版), 2016, 38(6):35-48. doi:10.11885/j.issn.16745086.2015.02.04.05 CUI Yufeng, WANG Guiwen, SUN Yanhui, et al. Methods of cutoff determination and applicability analysis in low porosity and low permeability reservoir[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2016, 38(6):35-48. doi:10.11885/j.issn.1674-5086.2015.02.04.05
[27] SEIDLE J P, JEANSONNE M W, ERICKSON D J. Application of matchstick geometry to stress dependent permeability in coals[C]. SPE 24361, 1992. doi:10.2118/24361MS
[28] SHI Jiquan, DURUCAN S. A model for changes in coalbed permeability during primary and enhanced methane recovery[C]. SPE 87230, 2005. doi:10.2118/87230-PA
[29] XU Hao, TANG Dazhen, TANG Shuheng, et al. A dynamic prediction model for gas-water effective permeability based on coalbed methane production data[J]. International Journal of Coal Geology, 2014, 121(1):44-52. doi:10.1016/j.coal.2013.11.008
[30] 孟召平,田永东,李国富. 煤层气开发地质学理论与方法[M]. 北京:科学出版社, 2010.
[31] BALAN H O, GUMRAH F. Assessment of shrinkage-swelling influences in coal seams using rankdependent physical coal properties[J]. International Journal of Coal Geology, 2009, 77(1):203-213. doi:10.1016/j. coal.2008.09.014
[32] 胡素明,李相方. 考虑煤自调节效应的煤层气藏物质平衡方程[J]. 天然气勘探与开发, 2010, 33(1):38-41. doi:10.3969/j.issn.1673-3177.2010.01.009 HU Suming, LI Xiangfang. Material balance equation of coalbed methane reservoir with consideration of selfadjustment effect of coal[J]. Natural Gas Exploration and Development, 2010, 33(1):38-41. doi:10.3969/j.issn.1673-3177.2010.01.009

中煤阶煤层气井排采阶段划分及渗透率变化

Division of Different Drainage and Production Stages of Medium-rank Coalbed Methane Wells and the Change in Permeability

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	宋金波, 赵益忠, 贾培锋, 张雨晨, 陈雪. 磷酸酯改性呋喃树脂固砂剂的制备及性能研究[J]. 西南石油大学学报(自然科学版), 2020, 42(4): 173-180.
[2]	于华, 令狐松, 王谦, 郭庆明, 伍莹. 一种砂岩储层渗透率计算新方法[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 125-132.
[3]	罗川, 周鹏高, 杨虎, 石建刚. 低渗透储层应力敏感特征探讨[J]. 西南石油大学学报(自然科学版), 2020, 42(1): 119-125.
[4]	胡德高, 郭肖, 郑爱维, 舒志国, 张柏桥. 页岩气藏压裂井产能评价及分析[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 132-138.
[5]	李金宜, 段宇, 周凤军, 朱文森, 信召玲. 一种基于水淹影响的相渗曲线重构方法[J]. 西南石油大学学报(自然科学版), 2019, 41(3): 151-159.
[6]	刘晨. 考虑储层参数时变的相对渗透率曲线计算方法[J]. 西南石油大学学报(自然科学版), 2019, 41(2): 137-142.
[7]	刘浩瀚, 颜永勤. 特高含水期相渗关系表征新理论与实践[J]. 西南石油大学学报(自然科学版), 2019, 41(2): 127-136.
[8]	洪楚侨, 王雯娟, 鲁瑞彬, 钟家峻, 任超群. 强水驱油藏渗透率动态变化规律定量预测方法[J]. 西南石油大学学报(自然科学版), 2018, 40(5): 113-121.
[9]	陈森, 林伯韬, 金衍, 张磊, 黄勇. SAGD井微压裂储层渗透率变化规律研究[J]. 西南石油大学学报(自然科学版), 2018, 40(1): 141-148.
[10]	唐永强, 吕成远, 侯吉瑞. 基于多孔介质中聚合物弹性的相渗曲线研究[J]. 西南石油大学学报(自然科学版), 2017, 39(4): 127-135.
[11]	王明培, 陈猛, 李闽, 唐雁冰, 李林芳. 有效应力作用下岩石渗透性和电性响应特征[J]. 西南石油大学学报(自然科学版), 2017, 39(3): 85-96.
[12]	孙宝泉. 温度对稠油/热水相对渗透率的影响[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 99-104.
[13]	刘峰, 陈小凡. 各向异性油藏菱形反九点井网合理井排距研究[J]. 西南石油大学学报(自然科学版), 2016, 38(6): 125-130.
[14]	赵凤兰, 李子豪, 李国桥, 宋兆杰, 侯吉瑞. 三元复合驱后关键储层特征参数实验研究[J]. 西南石油大学学报(自然科学版), 2016, 38(5): 157-164.
[15]	纪国法1 *，杨兆中1，李小刚1，刘文涛2，周瀚3. 考虑蚓孔的碳酸盐岩酸化产能计算新模型[J]. 西南石油大学学报(自然科学版), 2016, 38(3): 90-94.