水力压裂裂缝相互干扰应力阴影效应理论分析

doi:10.13722/j.cnki.jrme.2017.0405

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (659 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要针对油气田水力压裂工程中多裂缝相互干扰应力阴影效应问题，引入三类断裂力学干扰因子，采用权函数理论求解有限尺度地层剖面内部裂缝尖端应力强度因子，分析裂缝干扰与竞争起裂行为。研究结果表明：(1) 基于权函数理论所得应力强度因子精度高于采用传统无限大裂缝模型所得应力强度因子；(2) 提高破裂压力以增大应力阴影效应作用范围受局限，破裂压力达临界值时，扰动因子出现奇异性最值；(3) 应力阴影效应对裂缝间距变化非常敏感，距离直井双翼裂缝扩展总长度一半位置相互干扰行为更加显著；(4) 裂缝应力阴影效应随垂直地应力增大呈线性规律增强；(5) 裂缝扩展角度变化造成裂缝相互干扰规律极其复杂，并依赖于破裂压力、诱导应力及地应力变化；(6) 应力强度因子为负值的特殊闭合裂缝与常规水力裂缝干扰规律明显不同，干扰因子对定量分析闭合裂缝扰动也具有作用；(7) 破裂压力与诱导应力交替作用可导致非等长裂缝竞争起裂效果产生差异性转变。研究结果在页岩油气、薄差油层及干热岩等资源开发的水力压裂工程中定量分析多裂缝干扰力学行为具有参考意义。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	于永军
	朱万成
	李连崇
	魏晨慧
	代风
	刘书源
	王卫东

关键词 ：石油工程, 水力压裂, 权函数理论, 裂缝干扰, 干扰因子, 应力阴影, 断裂力学

Abstract：Stress shadow effect and interference of fractures are of great significance in hydraulic fracturing engineering of oil and gas. Three types of interference factors were defined and the stress intensity factors(SIFs) of fractures in finite geological profile were calculated based on the weight function theory. The mechanisms of fracture interference were analysed. The SIFs obtained with the proposed method are more accurate than those with the traditional infinite fracture model. The effect of increasing breakdown pressure to enlarge stress shadow domain is limited. The disturbance factor has singularity when the breakdown pressure reaches its critical value. The stress shadow effect is apparently sensitive to the distance between fractures. The stress shadow effect is more obvious when it is located at half length of the hydraulic fractures in vertical wells. The stress shadow effect increases linearly with the increment of vertical geostress. The mechanism of variation of fracturing angle causing the fracture interference is very complicated which depends on the breakdown pressure induced stress and geostress. The interference between the closed fractures with negative SIFs is different from that between the conventional open fractures. The interference factor has the potential application prospect in evaluating the interference between the specially closed fractures. The alternating action of breakdown pressure and induced stress can result in the transition of competitive fracturing processes.

Key words： petroleum engineering hydraulic fracturing weight function theory fracture interference interference factors stress shadow fracture mechanics

引用本文:

于永军，朱万成，李连崇，魏晨慧，代风，刘书源，王卫东. 水力压裂裂缝相互干扰应力阴影效应理论分析[J]. 岩石力学与工程学报, 2017, 36(12): 2926-2939.
YU Yongjun，ZHU Wancheng，LI Lianchong，WEI Chenhui，DAI Feng，LIU Shuyuan，WANG Weidong. Analysis on stress shadow of mutual interference of fractures in hydraulic fracturing engineering. , 2017, 36(12): 2926-2939.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2017.0405 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/I12/2926

[1]	郭建春，尹建，赵志红. 裂缝干扰下页岩储层压裂形成复杂裂缝可行性[J]. 岩石力学与工程学报，2014，33(8)：1 590-1 596.(GUO Jianchun，YIN Jian，ZHAO Zhihong. Feasibility of formation of complex fractures under cracks interferences in shale reservoir fracturing[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(8)：1 590-1 596.(in Chinese))
[2]	任岚，陶永富，赵金洲，等. 超低渗透砂岩储层同步压裂先导性矿场试验[J]. 岩石力学与工程学报，2015，34(2)：331-339.(REN Lan，TAO Yongfu，ZHAO Jinzhou，et al. Simultaneous hydraulic fracturing field tests in ultra-low permeability sandstone reservoir of Changqing oilfield[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(2)：331-339.(in Chinese))
[3]	张劲，张士诚. 水平多缝间的相互干扰研究[J]. 岩石力学与工程学报，2004，23(14)：2 351-2 354.(ZHANG Jin，ZHANG Shicheng. Study on interference among horizontal multi-fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(14)：2 351- 2 354.(in Chinese))
[4]	曾青冬，姚军，孙致学. 页岩气藏压裂缝网扩展数值模拟[J]. 力学学报，2015，47(6)：995-999.(ZENG Qingdong，YAO Jun，SUN Zhixue. Numerical modeling of fracture network propagation in shale reservoirs[J]. Chinese Journal of Theoretical and Applied Mechanics，2015，47(6)：995-999.(in Chinese))
[5]	郭天魁，张士诚，刘卫来，等. 页岩储层射孔水平井分段压裂的起裂压力[J]. 天然气工业，2013，33(12)：87-93.(GUO Tiankui，ZHANG Shicheng，LIU Weilai，et al. Initiation pressure of multi-stage fracking for perforated horizontal wells of shale gas reservoirs[J]. Natural Gas Industry，2013，33(12)：87-93.(in Chinese))
[6]	SNEDDON I N. The Distribution of stress in the neighborhood of a crack in an elastic solid[J]. Proceedings of the Royal Society of London：Series A，Mathematical and Physical，1946，187(1009)：229-260. " target="_blank">
[7]	翁定为，付海峰，卢拥军，等. 储层改造体积预测模型的研究与应用[J]. 石油钻探技术，2016，44(1)：96-100.(WENG Dingwei，FU Haifeng，LU Yongjun，et al. A model for predicting the volume of stimulated reservoirs[J]. Petroleum Drilling Techniques，2016，44(1)：96-100.(in Chinese))
[8]	翁定为，严星明，卢拥军，等. 考虑应力干扰的致密油气压裂设计及实现方法[J]. 中国矿业大学学报，2014，43(4)：640-645.(WENG Dingwei，YAN Xingming，LU Yongjun，et al. Optimization and realization of stress interference in tight oil and gas reservoir[J]. Journal of China University of Mining and Technology，2014，43(4)：640-645.(in Chinese))
[9]	才博，唐邦忠，丁云宏，等. 应力阴影效应对水平井压裂的影响[J]. 天然气工业，2014，34(7)：55-59.(CAI Bo，TANG Bangzhong，DING Yunhong，et al. Influence of stress shadow on horizontal well fracturing[J]. Natural Gas Industry，2014，34(7)：55-59.(in Chinese))
[10]	PALMER I D. Induced stresses due to propped hydraulic fracture in coalbed methane wells[C] // Low Permeability Reservoirs Symposium. Denver，Colorado：[s. n.]，1993：222-232. " target="_blank">
[11]	陈军斌，魏波，谢青，等. 基于扩展有限元的页岩水平井多裂缝模拟研究[J]. 应用数学和力学，2016，37(1)：73-83.(CHEN Junbin，WEI Bo，XIE Qing，et al. Simulation of multi-hydrofracture horizontal wells in shale based on the extended finite element method[J]. Applied Mathematics and Mechanics，2016，37(1)：73-83.(in Chinese))
[12]	孙致学，徐铁，吕抒桓，等. 增强型地热系统热流固耦合模型及数值模拟[J]. 中国石油大学学报，2016，40(6)：110-117.(SUN Zhixue，XU Yi，LU Shuhuan，et al. A thermo-hydro-mechanical coupling model for numerical simulation of enhanced geothermal systems[J]. Journal of China University of Petroleum，2016，40(6)：110-117.(in Chinese))
[13]	申云飞，卢玮，陈莹，等. 水力压裂技术在豫西基岩地热井增产中的应用研究[J]. 探矿工程，2016，43(10)：253-256.(SHEN Yunfei，LU Wei，CHEN Ying，et al. Application research on hydraulic fracturing technology for bedrock geothermal yield increasing in western Henan[J]. Exploration Engineering，2016，43(10)：253-256.(in Chinese))
[14]	BUNGER A P. Parameters affecting the interaction among closely spaced hydraulic fractures[J]. SPE Journal，2012(17)：292-306. " target="_blank">
[15]	BUNGER A P，JEFFREY R G，KEAR J，et al. Experimental Investigation of the Interaction among Closely Spaced Hydraulic Fractures[C]// Proceedings of the 45th US Rock Mechanics/ Geomechanics Symposium. [S. l.]：[s. n.]，2011：311-318. " target="_blank">
[16]	OLSON J E，DAHI-TALEGHANI A. Modeling simultaneous growth of multiple hydraulic fractures and their interaction with natural fractures[C]// SPE Hydraulic Fracturing Technology Conference. [S. l.]：[s. n.]，2009：1-7. " target="_blank">
[17]	OLSON J E. Multi-fracture propagation modeling：applications to hydraulic fracturing in shale's and tight gas sands[C]// Proceedings of the 42nd US Rock Mechanics Symposium. [S. l.]：[s. n.]，2008：327-335. " target="_blank">
[18]	GUO J C，ZHAO X，ZHU H Y，et al. Numerical simulation of interaction of hydraulic fracture and natural fracture based on the cohesive zone finite element method[J]. Journal of Natural Gas Science and Engineering，2015，25：180-188. " target="_blank">
[19]	李连崇，张潦源，黄波，等. 薄互层储层水平井压裂裂缝延伸规律模拟分析[J]. 地下空间与工程学报，2016，12(6)：1 578-1 585.(LI Lianchong，ZHANG Lianyuan，HUANG Bo，et al. Numerical investigation on the propagation law of hydraulic fractures near horizontal wells in thin interbedded reservoir[J]. Chinese Journal of Underground Space and Engineering，2016，12(6)：1 578-1 585.(in Chinese))
[20]	LI L C，TANG C A，LI G，et al. Numerical simulation of 3D hydraulic fracturing based on an improved flow-stress-damage model and a parallel FEM technique[J]. Rock Mechanics and Rock Engineering，2012，45：801-818. " target="_blank">
[21]	俞绍诚. 水力压裂技术手册[M]. 北京：石油工业出版社，2010：232-237.(YU Shaocheng. Manual for hydraulic fracturing technique[M]. Beijing：Petroleum Industry Press，2010：232-237.(in Chinese)) " target="_blank">
[22]	BUECKNER H F. A novel principle for the computation of stress intensity factors[J]. Zeitschrift fuer Angewandte Mathematik and Mechanik，1970，50(9)：529-546. " target="_blank">
[23]	WU X R. Analytical wide-range weight functions for various finite cracked bodies[J]. Engineering Analysis with Boundary Elements，1992，9(4)：307-322. " target="_blank">
[24]	WU X R，WU W. Strip yield crack analysis for multiple site damage in infinite and finite panels-A weight function approach[J]. Engineering Fracture Mechanics，2011，78(14)：2 585-2 596. " target="_blank">
[25]	WU X R，CARLSSON A J. Weight functions and stress intensity factor solutions[M]. Oxford：Pergamon Press，1991：39-43. " target="_blank">
[26]	郦正能，关志东，张纪奎，等. 应用断裂力学[M]. 北京：北京航空航天大学出版社，2012：73-78.(LI Zhengneng，GUAN Zhidong，ZHANG Jikui，et al. Applied fracture mechanics[M]. Beijing：Beihang University Press，2012：73-78.(in Chinese)) " target="_blank">
[27]	衡帅，杨春和，曾义金，等. 页岩水力压裂裂缝形态的试验研究[J]. 岩土工程学报，2014，36(7)：1 244-1 251.(HENG Shuai，YANG Chunhe，ZENG Yijin，et al. Experimental study on hydraulic fracture geometry of shale[J]. Chinese Journal of Geotechnical Engineering，2014，36(7)：1 244-1 251.(in Chinese))
[28]	RAHMAN M M，HOSSAIN M M，CROSBY D G，et al. Analytical， numerical and experimental investigations of transverse fracture propagation from horizontal wells[J]. Journal of Petroleum Science and Engineering，2002，35(3/4)：127-150. " target="_blank">
[29]	赵金洲，任岚，胡永全. 页岩储层压裂缝成网延伸的受控因素分析[J]. 西南石油大学学报，2013，35(1)：2-9.(ZHAO Jinzhou，REN Lan，HU Yongquan. Controlling factors of hydraulic fractures extending into network in shale formations[J]. Journal of Southwest Petroleum University，2013，35(1)：2-9.(in Chinese))
[30]	ROUSSEL N P，SHARMA M M. Optimizing fracture spacing and sequencing in horizontal-well fracturing[J]. SPE Production and Operations，2011，26(2)：173-184.
[31]	CHENG Y. Boundary element analysis of the stress distribution around multiple fractures：implications for the spacing of perforation clusters of hydraulically fractured horizontal wells[J]. SPE Journal，2009：1-15. " target="_blank">