电脉冲水压致裂煤岩超声波检测评价方法

doi:10.13809/j.cnki.cn32-1825/te.2020.04.012

油气藏评价与开发 ›› 2020, Vol. 10 ›› Issue (4): 81-86.doi: 10.13809/j.cnki.cn32-1825/te.2020.04.012

电脉冲水压致裂煤岩超声波检测评价方法

鲍先凯¹(),曹嘉星¹(),赵刚¹,郭军宇¹,刘源¹,赵金昌²,武晋文³

1.内蒙古科技大学土木工程学院,内蒙古包头 014010
2.太原理工大学矿业工程学院,山西太原 030024
3.中北大学理学院,山西太原 030051

收稿日期:2019-06-24 出版日期:2020-08-26 发布日期:2020-08-07
通讯作者: 曹嘉星 E-mail:bxkzlm@163.com;18947257406@163.com
作者简介:鲍先凯（1974 —）,男,博士,副教授,从事煤层气增产改造理论与技术研究。通讯地址：内蒙古自治区包头市阿尔丁大街7号,邮政编码：014000。E-mail: bxkzlm@163.com
基金资助:
国家自然基金青年科学基金项目“岩石高温三轴压裂机理研究”(51504220);内蒙古自然科学基金“基于高压电脉冲水压致裂的低渗透性煤层气解吸增透效果试验研究”(2016MS0511);山西省自然科学基金“静水压力作用下脉冲放电水激波不同速率动载组合致裂低渗透煤层机理研究”(201701D22111223)

Ultrasonic testing and evaluation method for hydraulic fracturing coal by voltage pulse

BAO Xiankai¹(),CAO Jiaxing¹(),ZHAO Gang¹,GUO Junyu¹,LIU Yuan¹,ZHAO Jinchang²,WU Jinwen³

1. School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
2. College of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
3. School of Science, North University of China, Taiyuan, Shanxi 030051, China

Received:2019-06-24 Online:2020-08-26 Published:2020-08-07
Contact: CAO Jiaxing E-mail:bxkzlm@163.com;18947257406@163.com

摘要/Abstract

摘要：

为了定量评价电脉冲水力压裂煤岩体致裂效果,确定该技术适用于工程实践中的电压及水压的加载量,设计了电脉冲水压致裂超声波检测试验方案,并通过数值计算从损伤变量、裂缝扩展宽度两个评价指标定量表征该技术在不同加载条件下对煤岩体的致裂效果,及相较于单纯静水压力压裂的优越性。实验结果表明：①由于加载液电压力存在的波动性,其损伤程度在钻孔周围破坏最严重,随着波动压力的减弱,煤岩体损伤程度逐渐降低;②损伤变量及裂缝宽度与加载电压之间呈正相关关系,均随着电压的增加而增加;③通过损伤变量、裂缝宽度这两个指标定量分析了电脉冲水压致裂煤体效果,可为煤层气开采提供参考。

关键词: 电脉冲, 煤岩, 超声波, 液电耦合, 损伤变量, 裂缝宽度

Abstract:

In order to quantitatively evaluate the fracturing effect of hydraulic fracturing by voltage pulse on coal rocks, and determine that whether the technology is suitable for the voltage and water pressure loading in engineering practice or not, the voltage pulse hydraulic fracturing ultrasonic testing test is designed, the fracturing effect of this technique on coal rocks under different loading conditions is quantitatively characterized by the numerical calculation from damage variables and crack propagation width, and its advantages compared to the operation of hydrostatic fracturing merely is evaluated. The conclusions are as follows: ①Due to the fluctuation of load fluid electrical pressure, the damage degree around the borehole is the most serious, reducing with the decreases of the fluctuating pressure. ②The damage variables and crack width are positively correlated with the loading voltage, which increase with the increase of voltage. ③The fracturing effect of hydraulic fracturing by voltage pulse on coal is quantitatively analyzed from damage variable and crack width, which can provide reference for coalbed methane.

Key words: voltage pulse, coal rock, ultrasonic, liquid-electric coupling, damage variable, crack width

中图分类号:

TE37

鲍先凯,曹嘉星,赵刚,郭军宇,刘源,赵金昌,武晋文. 电脉冲水压致裂煤岩超声波检测评价方法[J]. 油气藏评价与开发, 2020, 10(4): 81-86.

BAO Xiankai,CAO Jiaxing,ZHAO Gang,GUO Junyu,LIU Yuan,ZHAO Jinchang,WU Jinwen. Ultrasonic testing and evaluation method for hydraulic fracturing coal by voltage pulse[J]. Reservoir Evaluation and Development, 2020, 10(4): 81-86.

图/表 9

表1

表2

图 1

图2

表3

图3

图4

图5

图6

参考文献 24

[1]	赵瑜, 王超林, 曹汉 , 等. 页岩渗流模型及孔压与温度影响机理研究[J]. 煤炭学报, 2018,43(6):1754-1760.
	ZHAO Y, WANG C L, CAO H , et al. Influencing mechanism and modelling study of pore pressure and temperature on shale permeability[J]. Journal of China Coal Society, 2018,43(6):1754-1760.
[2]	陈天宇, 冯夏庭, 杨成祥 , 等. 含气页岩渗透率的围压敏感性和各向异性研究[J]. 采矿与安全工程学报, 2014,31(4):639-643.
	CHEN T Y, FENG X T, YANG C X , et al. Research on confining pressure sensitivity and anisotropy for gas shale permeability[J]. Journal of Mining and Safety Engineering, 2014,31(4):639-643.
[3]	曹成, 李天太, 王晖 , 等. 页岩渗透率测试方法研究与应用[J]. 天然气地球科学, 2016,27(3):503-512.
	CAO C, LI T T, WANG H , et al. Research and application of shale permeability test method[J]. Natural Gas Geoscience, 2016,27(3):503-512.
[4]	张波, 胡维强, 徐爽 , 等. 煤层气快速解吸方法研究[J]. 非常规油气, 2018,5(6):34-37.
	ZHANG B, HU W Q, XU S , et al. Study on the method of rapid desorption of coalbed methane[J]. Unconventional Oil & Gas, 2018,5(6):34-37.
[5]	이형석, 강판상, Lim, Jong-Se. Study for improvement of multi-stage hydraulic fracturing design for eagle ford shale reservoir using rate transient analysis[J]. Journal of the Korean Society of Mineral and Energy Resources Engineers, 2017,54(6):664-678.
[6]	王素兵 . 清水压裂工艺技术综述[J]. 天然气勘探与开发, 2005,28(4):39-42.
	WANG S B . Riverfrac treatment[J]. Natural Gas Exploration and Development, 2005,28(4):39-42.
[7]	TIAN S, LI G, HUANG Z , et al. Investigation and application for multistage hydrajet-fracturing with coiled tubing[J]. Petroleum Science and Technology, 2009,27(13):1494-1502.
[8]	蔡峰, 刘泽功 . 深部低透气性煤层上向穿层水力压裂强化增透技术[J]. 煤炭学报, 2016,41(1):113-119.
	CAI F, LIU Z G . Simulation and experimental research on upward cross-seams hydraulic fracturing in deep and low-permeability coal seam[J]. Journal of China Coal Society, 2016,41(1):113-119.
[9]	马海峰, 程志恒, 张科学 , 等. 千米深井高瓦斯煤层W-S-W水力压裂强化增透试验研究[J]. 煤炭学报, 2017,42(7):1757-1764.
	MA H F, CHENG Z H, ZHANG K X , et al. Intensive permeability enhancement experiment through hydraulic fracturing by way of water-sand-water in kilometer deep well with high gas seam[J]. Journal of China Coal Society, 2017,42(7):1757-1764.
[10]	林柏泉, 王一涵, 闫发志 , 等. NaCl溶液对电脉冲致裂煤体孔隙结构影响的实验研究[J]. 煤炭学报, 2018,43(5):1328-1334.
	LIN B Q, WANG Y H, YAN F Z , et al. Experimental study of the effect of NaCl solution on the pore structure of coal body with high-voltage electrical pulse treatments[J]. Journal of China Coal Society, 2018,43(5):1328-1334.
[11]	周晓亭 . 重复电脉冲波煤岩致裂增渗效果岩石学分析[D]. 徐州:中国矿业大学, 2016.
	ZHOU X T . Petrological analysis of cracking and seepage effect of repeated electric pulse wave coal rock[D]. Xuzhou: China University of Mining and Technology, 2016.
[12]	李培培 . 钻孔注水高压电脉冲致裂瓦斯抽放技术基础研究[D]. 太原:太原理工大学, 2010.
	LI P P . Fundamental research on high-voltage electric pulse-induced gas drainage technology for borehole water injection[D]. Taiyuan: Taiyuan University of Technology, 2010.
[13]	鲍先凯, 杨东伟, 段东明 , 等. 高压电脉冲水力压裂法煤层气增透的试验与数值模拟[J]. 岩石力学与工程学报, 2017,36(10):2415-2423.
	BAO X K, YANG D W, DUAN D M , et al. The experiment and numerical simulation of penetration of coalbed methane upon hydraulic fracturing under high-voltage electric pulse[J]. Chinese Journal of Rock Mechanics and Engineering, 2017,36(10):2415-2423.
[14]	张金才, 尹尚先 . 页岩油气与煤层气开发的岩石力学与压裂关键技术[J]. 煤炭学报, 2014,39(8):1691-1699.
	ZHANG J C, YIN S X . Some technologies of rock mechanics applications and hydraulic fracturing in shale oil, shale gas and coalbed methane[J]. Journal of China Coal Society, 2014,39(8):1691-1699.
[15]	侯冰, 陈勉, 李志猛 , 等. 页岩储集层水力裂缝网络扩展规模评价方法[J]. 石油勘探与开发, 2014,41(6):763-768.
	HOU B, CHEN M, LI Z M , et al. Propagation area evaluation of hydraulic fracture networks in shale gas reservoirs[J]. Petroleum Exploration and Development, 2014,41(6):763-768.
[16]	孙四清, 张群, 闫志铭 , 等. 碎软低渗高突煤层井下长钻孔整体水力压裂增透工程实践[J]. 煤炭学报, 2017,42(9):2337-2344.
	SUN S Q, ZHANG Q, YAN Z M , et al. Practice of permeability enhancement through overall hydraulic fracturing of long hole in outburst-prone soft crushed coal seam with low permeability[J]. Journal of China Coal Society, 2017,42(9):2337-2344.
[17]	房好青, 郭天魁, 王洋 , 等. 四川盆地涪陵地区页岩酸压裂缝渗透率实验[J]. 石油与天然气地质, 2018,39(6):1336-1342.
	FANG H Q, GUO T K, WANG Y , et al. Experimental study of acid-fracturing-induced fracture permeability in shale in Fuling area, Sichuan Basin[J]. Oil & Gas Geology, 2018,39(6):1336-1342.
[18]	尹锦涛, 田杰苗, 孙建博 , 等. 煤层气水力压裂增产机理及效果评价方法研究[J]. 非常规油气, 2015,2(5):72-76.
	YIN J T, TIAN J M, SUN J B , et al. Principle of water fracturing stimulation for CBM and its effect evaluation methods[J]. Unconventional Oil & Gas, 2015,2(5):72-76.
[19]	王晓冬, 张义堂, 刘慈群 . 垂直裂缝井产能及导流能力优化研究[J]. 石油勘探与开发, 2004,31(6):78-81.
	WANG X D, ZHANG Y T, LIU C Q . Productivity evaluation and conductivity optimization for vertically fractured wells[J]. Petroleum Exploration and Development, 2004,31(6):78-81
[20]	鲍先凯, 段东明, 曹嘉星 , 等. 电脉冲水力压裂煤体机理及裂缝效果评价[J]. 水利水电技术, 2018,49(8):39-46.
	BAO X K, DUAN D M, CAO J X , et al. Evaluation on mechanism of electric-pulse hydraulic fracturing of coal mass and its cracking effect[J]. Water Resources and Hydropower Engineering, 2018,49(8):39-46.
[21]	QASRAWI H Y, IQBAL A M . The use of USPV to anticipate failure in concrete under compression[J]. Cement and Concrete Research, 2003,33(12):2017-2021.
[22]	李健, 荣吉利, 杨荣杰 , 等. 水中爆炸冲击波传播与气泡脉动的实验及数值模拟[J]. 兵工学报, 2008,29(12):1437-1443.
	LI J, RONG J L, YANG R J , et al. Experimental and numerical simulation of shock wave propagation and bubble impulse of underwater explosion[J]. Acta Armamentarii, 2008,29(12):1437-1443.
[23]	楚泽涵, 徐凌堂, 高明 , 等. 井下超声和高压放电——油井增产的有效措施[J]. 特种油气藏, 2008,15(1):84-87.
	CHU Z H, XU L T, GAO M , et al. Downhole ultrasonic and effluve——an effective stimulation method[J]. Special Oil & Gas Reservoirs, 2008,15(1):84-87.
[24]	陆小兵, 王守虎, 隋蕾 , 等. 电脉冲解堵增注机理分析及应用[J]. 天然气与石油, 2011,29(6):61-62.
	LU X B, WANG S H, YAN L , et al. Analysis and application of electric pulse de-plugging and injection-adding mechanism[J]. Natural Gas and Oil, 2011,29(6):61-62.

参数名称	参数值	参数名称	参数值
容重/（kN·m^-3）	15.15	内聚力/MPa	1.78
抗压强度/MPa	19.69	内摩擦角/（° ）	35
弹性模量/MPa	11 065	坚固性系数	2.8
泊松比	0.30×10^-6	抗拉强度/MPa	2.53

特征项目	特征描述
煤体结构	原生结构煤
光泽	明亮
构造特征	层状或条带状构造
节理性质	节理系统发达且有次序
节理面性质	节理面平整且被黄铁矿或方解石充填、次生节理面少
断口性质	贝壳状或阶梯状
强度	强度较高,用手难以掰开

试验编号	静水压力/MPa	电压/kV
1	3	0
2	3	9
3	3	11
4	3	13

电脉冲水压致裂煤岩超声波检测评价方法

Ultrasonic testing and evaluation method for hydraulic fracturing coal by voltage pulse

RichHTML

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

图/表 9

参考文献 24

相关文章 4

Metrics

本文评价

推荐阅读 10

[1]	史利燕,李卫波,康琴琴,李菲,齐佳新. CH₄-煤吸附/解吸过程视电阻率变化的实验研究 [J]. 油气藏评价与开发, 2022, 12(4): 572-579.
[2]	鲍先凯,曹嘉星,段东明,赵金昌,武晋文. 水中脉冲放电压裂抽采煤层气机理与数值模拟研究 [J]. 油气藏评价与开发, 2019, 9(2): 71-74.
[3]	鲍先凯,段东明,曹嘉星,武晋文,赵金昌. 低渗透性煤体电脉冲水压致裂效果及规律研究 [J]. 油气藏评价与开发, 2018, 8(5): 64-69.
[4]	路艳军,杨兆中,ShelepovVV,韩金轩,李小刚,韩威. 煤岩体积压裂脆性评价研究 [J]. 油气藏评价与开发, 2018, 8(1): 64-70.