煤岩径向井-脉动水力压裂裂缝扩展规律与声发射响应特征

doi:10.7623/syxb201804011

石油学报 ›› 2018, Vol. 39 ›› Issue (4): 472-481.DOI: 10.7623/syxb201804011

煤岩径向井-脉动水力压裂裂缝扩展规律与声发射响应特征

张宏源¹, 黄中伟¹, 李根生¹, 陆沛青², 田守嶒¹, 李小江¹

1. 中国石油大学油气资源与探测国家重点实验室北京 102249;
2. 中国石油化工股份有限公司石油工程技术研究院北京 100100

收稿日期:2017-05-25 修回日期:2018-02-01 出版日期:2018-04-25 发布日期:2018-05-03
通讯作者: 黄中伟,男,1972年4月生,1994年获石油大学(华东)学士学位,2006年获中国石油大学(华东)博士学位,现为中国石油大学(北京)教授、博士生导师,主要从事油气井工程流体力学、完井增产技术方面的研究。Email:huangzw@cup.edu.cn
作者简介:张宏源,男,1990年12月生,2014年获中国石油大学(北京)石油工程专业学士学位,现为中国石油大学(北京)博士研究生,主要从事油气井工程压裂与完井技术方面的研究。Email:15210721460@163.com
基金资助:
国家自然科学基金石油化工联合基金项目（No.U1562212）和国家杰出青年科学基金项目（No.51725404）资助。

Fracture propagation laws and acoustic emission response characteristics of coal radial well-pulse hydraulic fracturing

Zhang Hongyuan¹, Huang Zhongwei¹, Li Gensheng¹, Lu Peiqing², Tian Shouceng¹, Li Xiaojiang¹

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
2. Sinopec Research Institute of Petroleum Engineering, Beijing 100100, China

Received:2017-05-25 Revised:2018-02-01 Online:2018-04-25 Published:2018-05-03

摘要/Abstract

摘要：

径向井-脉动水力压裂是一种煤层高效增透新方法。利用声发射仪和伺服式脉冲疲劳试验机，开展了煤岩径向井-脉动水力压裂室内实验。基于广义关联积分分形维数计算方法与型煤岩样声发射信号响应特征，分析了压裂过程中微裂缝发育特点和宏观裂缝扩展规律，探究了径向井分支数、长度、脉动频率和振幅等参数对压裂效果的影响规律。实验结果表明，低压脉动压裂阶段声发射信号相对分散，脉动能量促使微裂缝发育；高压脉动压裂阶段声发射信号相对集中，脉冲能量促使主裂缝快速延伸；呈非对称展布的径向井眼数量越多、长度越长，煤岩增透效果越好。实施径向井-脉动水力压裂时应控制初始脉动压力低于煤岩起裂压力，适当延长低压脉动作用时间，使微裂缝在近井地带充分发育，以降低主裂缝延伸压力，形成更大尺度宏观裂缝。

关键词: 煤岩, 径向水平井, 脉动水力压裂, 裂缝扩展, 声发射

Abstract:

Radial well-pulse hydraulic fracturing is novel stimulation method for coalbed methane. The acoustic emission detector and servo pulse fatigue test machine were used to conduct laboratory experiments on the coal radial well-pulse hydraulic fracturing. Based on the fractal dimension calculation of generalized correlation integral and the response characteristics of acoustic emission signals from briquette rock samples, this study analyzed the micro-fracture development characteristics and macroscopic fracture propagation laws in the fracturing progress, and explored the influence laws of several parameters, such as branch number, length, pulse rate and vibration amplitude of radial well, on fracturing effects. The experimental results show that the acoustic emission signals in the low-pressure pulse fracturing stage are relatively dispersal, and the pulse energy can improve the micro-fracture development. However, in the high-pressure pulse fracturing stage, the acoustic emission signals are relatively concentrated, and the pulse energy can accelerate the propagation of major fracture. The more the radial well boreholes with dissymmetrical distribution are, and the longer the boreholes are, the better the stimulation result will be. During the radial well-pulse hydraulic fracturing, the initial pulse pressure should be lower than initial fracturing pressure of coal rocks, and the appropriate extension of low-pressure pulse time leads to the full development of micro-fracture in the near-wellbore region, so as to reduce the extension pressure of major fracture and form larger macroscopic fractures.

Key words: coal rock, radial horizontal well, pulse hydraulic fracturing, fracture propagation, acoustic emission

中图分类号:

TE357.11

张宏源, 黄中伟, 李根生, 陆沛青, 田守嶒, 李小江. 煤岩径向井-脉动水力压裂裂缝扩展规律与声发射响应特征[J]. 石油学报, 2018, 39(4): 472-481.

Zhang Hongyuan, Huang Zhongwei, Li Gensheng, Lu Peiqing, Tian Shouceng, Li Xiaojiang. Fracture propagation laws and acoustic emission response characteristics of coal radial well-pulse hydraulic fracturing[J]. Acta Petrolei Sinica, 2018, 39(4): 472-481.

参考文献

[1] 秦勇,袁亮,胡千庭,等.我国煤层气勘探与开发技术现状及发展方向[J].煤炭科学技术,2012,40(10):1-6.
QIN Yong,YUAN Liang,HU Qianting,et al.Status and development orientation of coal bed methane exploration and development technology in China[J].Coal Science and Technology,2012,40(10):1-6.
[2] 秦勇,申建.论深部煤层气基本地质问题[J].石油学报,2016,37(1):125-136.
QIN Yong,SHEN Jian.On the fundamental issues of deep coalbed methane geology[J].Acta Petrolei Sinica, 2016,37(1):125-136.
[3] 李勇,曹代勇,魏迎春,等.准噶尔盆地南缘中低煤阶煤层气富集成藏规律[J].石油学报,2016,37(12):1472-1482.
LI Yong,CAO Daiyong,WEI Yingchun,et al.Middle to low rank coalbed methane accumulation and reservoiring in the southern margin of Junggar Basin[J].Acta Petrolei Sinica,2016,37(12):1472-1482.
[4] 张亚蒲,杨正明,鲜保安.煤层气增产技术[J].特种油气藏,2006,13(1):95-98.
ZHANG Yapu,YANG Zhengming,XIAN Bao'an.Coal-bed gas stimulation technology[J].Special Oil and Gas Reservoirs,2016,13(1):95-98.
[5] 康永尚,王金,姜杉钰,等.量化指标在煤层气开发潜力定量评价中的应用[J].石油学报,2017,38(6):677-686.
KANG Yongshang,WANG Jin,JIANG Shanyu,et al.Application of quantitative indexes in quantitative evaluation of coalbed methane development potential[J].Acta Petrolei Sinica,2017,38(6):677-686.
[6] 吴国干,方辉,韩征,等."十二五"中国油气储量增长特点及"十三五"储量增长展望[J].石油学报,2016,37(9):1145-1151.
WU Guogan,FANG Hui,HAN Zheng,et al.Growth features of measured oil initially in place & gas initially in place during the 12th Five-Year Plan and its outlook for the 13th Five-Year Plan in China[J].Acta Petrolei Sinica,2016,37(9):1145-1151.
[7] LABUS K.《Gluckauf》脉冲式高压煤壁注水方法的进展[M].曹慧英,译.[S.1.]:[s.n.],1969:814-819.
LABUS K.Progress of the injection method of pulse-type high pressure coal wall in Gluckauf[M].Translated by CAO Huiying.[s.1.]:[s.n.],1969:814-819.
[8] 林柏泉,李子成,翟成,等.高压脉动水力压裂卸压增透技术及应用[J].采矿与安全工程学报,2011,28(3):452-455.
LIN Baiquan,LI Zicheng,ZHAI Cheng,et al.Pressure relief and permeability-increasing technology based on high pressure pulsating hydraulic fracturing and its application[J].Journal of Mining & Safety Engineering,2011,28(3):452-455.
[9] 彭深,林柏泉,翟成,等.本煤层脉动水力压裂卸压增透技术应用[J].煤炭工程,2014,46(5):36-38.
PENG Shen,LIN Baiquan,ZHAI Cheng,et al.Application of pulse hydraulic fracturing,pressure releasing and permeability improvement technology to mining seam[J].Coal Engineering,2014,46(5):36-38.
[10] 翟成,李贤忠,李全贵.煤层脉动水力压裂卸压增透技术研究与应用[J].煤炭学报,2011,36(12):1996-2001.
ZHAI Cheng,LI Xianzhong,Li Quangui.Research and application of coal seam pulse hydraulic fracturing technology[J].Journal of China Coal Society,2011,36(12):1996-2001.
[11] LI Quangui,Lin Baiquan,ZHAI Cheng,et al.Variable frequency of pulse hydraulic fracturing for improving permeability in coal seam[J].International Journal of Mining Science and Technology,2013,23(6):847-853.
[12] LI Quangui,LIN Baiquan,Zhai Cheng.The effect of pulse frequency on the fracture extension during hydraulic fracturing[J].Journal of Natural Gas Science and Engineering, 2014,21:296-303.
[13] 李全贵,林柏泉,翟成,等.煤层脉动水力压裂中脉动参量作用特性的实验研究[J].煤炭学报,2013,38(7):1185-1190.
LI Quangui,LIN Baiquan,ZHAI Cheng,et al.Experimental study on action characteristic of pulsating parameters in coal seam pulse hydraulic fracturing[J].Journal of China Coal Society,2013,38(7):1185-1190.
[14] 朱红青,张民波,顾北方,等.脉动孔隙水压下低透性松软煤岩损伤变形的实验分析[J].煤炭学报,2014,39(7):1269-1274.
ZHU Hongqing,ZHANG Minbo,GU Beifang,et al.Experimental analysis of damage deformation of low permeability and soft coal under pulsating water pressure[J].Journal of China Coal Society,2014,39(7):1269-1274.
[15] 朱红青,张民波,顾北方,等.脉动孔隙水压下煤岩损伤变形的能量观点分析[J].中南大学学报:自然科学版,2014,45(10):3657-3663.
ZHU Hongqing,ZHANG Minbo,GU Beifang,et al.Energy analysis of coal damage deformation under pulsating pore water pressure[J].Journal of Central South University:Science and Technology,2014,45(10):3657-3663.
[16] FU Xuan,LI Gensheng,HUANG Zhongwei,et al.Experimental and numerical study of radial lateral fracturing for coalbed methane[J].Journal of Geophysics and Engineering,2015,12(5):875-886.
[17] 付宣,李根生,黄中伟,等.煤层气径向水平井压裂室内试验与产能数值分析[J].石油钻探技术,2016,44(2):99-105.
FU Xuan,LI Gensheng,HUANG Zhongwei,et al.Laboratory testing and productivity numerical simulation for fracturing CBM radial horizontal wells[J].Petroleum Drilling Techniques,2016,44(2):99-105.
[18] 陆沛青.径向井-脉动水力压裂对煤层应力扰动效果的影响规律研究[D].北京:中国石油大学,2016.
LU Peiqing.Research on stress disturbance effect of radial lateral pulsating hydraulic fracturing in coal seams[D].Beijing:China University of Petroleum,Beijing,2016.
[19] LU Peiqing,LI Gensheng,HUANG Zhongwei,et al.Simulation and analysis of coal seam conditions on the stress disturbance effects of pulsating hydro-fracturing[J].Journal of Natural Gas Science and Engineering,2014,21:649-658.
[20] LU PeiQing,Li Gensheng,Huang Zhongwei,et al.A numerical analysis of the features of the stress disturbance during pulsating hydraulic fracturing in coal seams[R].SPE 177281,2015.
[21] 陆沛青,李根生,沈忠厚,等.裂缝充填物对脉动水力压裂应力扰动效果的数值模拟[J].中国石油大学学报:自然科学版,2015,39(4):77-84.
LU Peiqing,LI Gensheng,SHEN Zhonghou,et al.Numerical simulation of influence of crack fillers on stress disturbance effect during pulsating hydro-fracturing[J].Journal of China University of Petroleum,2015,39(4):77-84.
[22] 陆沛青,李根生,黄中伟,等.脉动水力压裂过程中煤层应力扰动特征的数值模拟分析[J].振动与冲击,2015,34(21):210-216.
LU Peiqing,LI Gensheng,HUANG Zhongwei,et al.Numerical simulation for stress disturbance features of coal beds during pulsating hydro-fracturing[J].Journal of Vibration and Shock,2015,34(21):210-216.
[23] 李同林,乌效鸣,屠厚泽.煤岩力学性质测试分析与应用[J].地质与勘探,2000,36(2):85-88.
LI Tonglin,WU Xiaoming,TU Houze.The measurement and analysis and application on the mechanical property of coal seam[J].Geology and Prospecting,2000,36(2):85-88.
[24] 颜志丰.山西晋城地区煤岩力学性质及煤储层压裂模拟研究[D].北京:中国地质大学,2009.
YAN Zhifeng.Research of the coal mechanical properties and coal reservoir fracturing simulation in Jincheng District,Shanxi Province[D].Beijing:China University of Geosciences,2009.
[25] 孙粉锦,李五忠,孙钦平,等.二连盆地吉尔嘎朗图凹陷低煤阶煤层气勘探[J].石油学报,2017,38(5):485-492.
SUN Fenjin,LI Wuzhong,SUN Qinping,et al.Low-rank coalbed methane exploration in Jiergalangtu sag,Erlian Basin[J].Acta Petrolei Sinica,2017,38(5):485-492.
[26] 杜长龙.煤岩模拟材料的试验研究[J].中国科技论文,2012,7(2):116-119.
DU Changlong.Experimental research on analogy materials of coal rock[J].China Sciencepaper,2012,7(2):116-119.
[27] 许江,叶桂兵,李波波,等.不同黏结剂配比条件下型煤力学及渗透特性试验研究[J].岩土力学,2015,36(1):104-110.
XU Jiang,YE Guibing,LI Bobo,et al.Experimental study of mechanical and permeability characteristics of moulded coals with different binder ratios[J].Rock and Soil Mechanics,2015,36(1):104-110.
[28] 康向涛,黄滚,邓博知,等.模拟原煤的相似材料试验研究[J].东北大学学报:自然科学版,2015,36(1):138-142.
KANG Xiangtao,HUANG Gun,DENG Bozhi,et al.Experimental study on similar material for simulating raw coal[J].Journal of Northeastern University:Natural Science,2015,36(1):138-142.
[29] GEIGER L.Probability method for the determination of earthquake epicenters from the arrival time only[J].Bulletin of St.Louis University,1912,8(1):56-71.
[30] 赵兴东,田军,李元辉,等.花岗岩破裂过程中的声发射活动性研究[J].中国矿业,2006,15(7):74-76.
ZHAO Xingdong,TIAN Jun,LI Yuanhui,et al.Study on the AE activity during the failure process of granite samples[J].China Mining Magazine,2006,15(7):74-76.
[31] 赵兴东,唐春安,李元辉,等.花岗岩破裂全过程的声发射特性研究[J].岩石力学与工程学报,2006,25(增刊2):3673-3678.
ZHAO Xingdong,TANG Chun'an,LI Yuanhui,et al.Study on AE activity characteristics under uniaxial compression loading[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3673-3678.
[32] 唐礼忠,XIA K W,李夕兵.矿山地震活动多重分形特性与地震活动性预测[J].岩石力学与工程学报,2010,29(9):1818-1824.
TANG Lizhong,XIA K W,LI Xibing.Seismic multi-fractal characteristics in mines and seismicity prediction[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(9):1818-1824.
[33] KAGAN Y Y.Observational evidence for earthquakes as a nonlinear dynamic process[J].Physica D:Nonlinear Phenomena,1994,77(1/3):160-192.
[34] HIRATA T.A correlation between the b value and the fractal dimension of earthquakes[J].Journal of Geophysical Research,1989,94(B6):7507-7514.
[35] ISHIDA T,AOYAGI K,NIWA T,et al.Acoustic emission monitoring of hydraulic fracturing laboratory experiment with supercritical and liquid CO₂[J].Geophysical Research Letters,2012,39(16):16309.

煤岩径向井-脉动水力压裂裂缝扩展规律与声发射响应特征

Fracture propagation laws and acoustic emission response characteristics of coal radial well-pulse hydraulic fracturing

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