深层页岩真三轴变排量水力压裂物理模拟研究

doi:10.13722/j.cnki.jrme.2018.1542

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Abstract Aiming at the condition of high horizontal stress difference in deep shale(greater than 10 MPa)，in order to clarify the formation law of complex fracture network in deep shale layers and to explore the stimulation methods to improve the complexity of fracture network，three fracturing modes were designed including gradually increasing the pumping rate in a pulsed style，step-form increasing the pumping rate and maintaining a constant pumping rate. By means of a large hydraulic fracturing apparatus under true triaxial condition，acoustic emission monitoring system and dissection photos of samples，the crack modes and extension rules of hydraulic fractures in deep shale were analyzed. The experimental results show that to some extent the total volume of injected fracturing fluid can reflect the complexity of fractures，and the more the total volume，the more complex the fracture net. For the fracturing mode with a pulsed pumping rate，the pump-stopping period contributes to the infiltration of the fracturing fluid into natural cracks and hence to activate natural fractures. The pumping rate of the fracturing fluid has a great impact on the formation of the complex fracture network，and a small pumping rate is conducive to the opening of original natural fractures while a high pumping rate makes the hydraulic fracture directly cut cross the pre-existing natural fractures. It is very important to open the natural fractures which are the material basis for forming the complex fracture net. The experimental study can provide a reference for on-site fracturing design.

Key words： rock mechanics deep shale hydraulic fracturing true triaxial fracturing varying pumping rate physical simulation

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	Articles by authors
	ZENG Yijin1
	2
	3
	ZHOU Jun3
	4
	WANG Haitao1
	2
	ZUO Luo1
	2
	JIANG Tingxue1
	2
	ZHONG Guanyu1
	2
	GUO Yintong3
	4
	CHANG Xin3
	4
	WANG Lei3
	4
	YANG Chunhe3
	4

Cite this article:

ZENG Yijin1,2,3, et al. Research on true triaxial hydraulic fracturing in deep shale with varying pumping rates[J]. , 2019, 38(9): 1758-1766.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.1542 OR http://www.rockmech.org/EN/Y2019/V38/I9/1758

[18]	GUO T，ZHANG S，QU Z，et al. Experimental study of hydraulic fracturing for shale by stimulated reservoir volume[J]. Fuel，2014，128：373-380.
[4]	蒋廷学，卞晓冰，王海涛，等. 深层页岩气水平井体积压裂技术[J]. 天然气工业，2017，37(1)：90-96.(JIANG Tingxue，BIAN Xiaobing，WANG Haitao，et al. Volume fracturing of deep shale gas horizontal wells[J]. Natural Gas Industry，2017，37(1)：90-96.(in Chinese))
[2]	陈作，曾义金. 深层页岩气分段压裂技术现状及发展建议[J]. 石油钻探技术，2016，(1)：6-11.(CHEN Zuo，ZENG Yijin. Present situations and prospects of multi-stage fracturing technology for deep shale gas development[J]. Petroleum Drilling Techniques，2016，(1)：6-11.(in Chinese))
[11]	XIE J，CHENG W，WANG R，et al. Experiments and analysis on the influence of perforation mode on hydraulic fracture geometry in shale formation[J]. Journal of Petroleum Science and Engineering，2018，168：133-147.
[1]	2017年全国矿产资源储量情况新闻发布会[EB/OL]. http：// www.mnr.gov.cn//dt/zb/2018/2017kczycl/. 2018-12-27.(The press conference of national mineral resources reserves in 2017[EB/OL]. http：//www.mnr.gov.cn//dt/zb/2018/2017kczycl/. 2018-12-27.(in Chinese))
[6]	蒋廷学，周健，张旭，等. 深层页岩气井裂缝扩展及导流特性研究及展望[J]. 中国科学：物理学力学天文学，2017，47(11)：33-40.(JIANG Tingxue，ZHOU Jian，ZHANG Xu，et al. Overview and prospect of fracture propagation and conductivity characteristics in deep shale gas wells[J]. Scientia Sinica Physica，Mechanica and Astronomica，2017，47(11)：33-40.(in Chinese))
[7]	郭印同，杨春和，贾长贵，等. 页岩水力压裂物理模拟与裂缝表征方法研究[J]. 岩石力学与工程学报，2014，33(1)：52-59.(GUO Yintong，YANG Chunhe，JIA Changgui，et al. Research on hydraulic fracturing physical simulation of shale and fracture characterization methods[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(1)：52-59.(IN Chinese))
[9]	侯振坤，杨春和，王磊，等. 大尺寸真三轴页岩水平井水力压裂物理模拟试验与裂缝延伸规律分析[J]. 岩土力学，2016，37(2)：407-414.(HOU Zhenkun，YANG Chunhe，WANG Lei，et al. Hydraulic fracture propagation of shale horizontal well by large-scale true triaxial physical simulation test[J]. Rock and Soil Mechanics，2016，37(2)：407-414.(in Chinese))
[13]	ZHANG X，LU Y，TANG J，et al. Experimental study on fracture initiation and propagation in shale using supercritical carbon dioxide fracturing[J]. Fuel，2017，190：370-378.
[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 Bin，CHEN Mian，LI Zhimeng，et al. Propagation area evaluation of hydraulic fracture networks in shale gas reservoirs[J]. Petroleum Exploration And Development，2014，41(6)：763-768.(in Chinese))
[16]	HOU B，ZHANG R，ZENG Y，et al. Analysis of hydraulic fracture initiation and propagation in deep shale formation with high horizontal stress difference[J]. Journal of Petroleum Science and Engineering，2018，170：231-243.
[5]	路保平，丁士东. 中国石化页岩气工程技术新进展与发展展望[J]. 石油钻探技术，2018，46(1)：1-9.(LU Baoping，DING Shidong. New progress and development prospect in shale gas engineering technologies of SINOPEC[J]. Petroleum Drilling Techniques，2018，46(1)：1-9.(in Chinese))
[8]	王磊，杨春和，侯振坤，等. 预制横缝条件下水力裂缝的起裂和扩展[J]. 岩土力学，2016，37(增1)：88-94.(WANG Lei，YANG Chunhe，HOU Zhenkun，et al. Initiation and propagation of hydraulic fractures under the condition of prefabricated transverse fracture[J]. Rock and Soil Mechanics，2016，37(Supp.1)：88-94.(in Chinese))
[14]	考佳玮，金衍，付卫能，等. 深层页岩在高水平应力差作用下压裂裂缝形态实验研究[J]. 岩石力学与工程学报，2018，37(6)：1 332-1 339.(KAO Jiawei，JIN Yan，FU Weineng，et al. Experimental research on the morphology of hydraulic fractures in deep shale under high difference of in-situ horizontal stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(6)：1 332-1 339.(in Chinese))
[17]	冯国强，赵立强，卞晓冰，等. 深层页岩气水平井多尺度裂缝压裂技术[J]. 石油钻探技术，2017，45(6)：77-82.(FENG Guoqiang，ZHAO Liqiang，BIAN Xiaobing，et al. Multi-scale hydraulic fracturing of horizontal wells in deep shale gas play[J]. Petroleum Drilling Techniques，2017，45(6)：77-82.(in Chinese))
[3]	曾义金，陈作，卞晓冰. 川东南深层页岩气分段压裂技术的突破与认识[J]. 天然气工业，2016，36(1)：61-67.(ZENG Yijin，CHEN Zuo，BIAN Xiaobing. Breakthrough in staged fracturing technology for deep shale gas reservoirs in SE Sichuan Basin and its implications[J]. Natural Gas Industry，2016，36(1)：61-67.(in Chinese))
[10]	魏元龙，杨春和，郭印同，等. 须家河组致密砂岩水力压裂裂缝形态的试验研究[J]. 岩石力学与工程学报，2016，35(增1)：2 720-2 731.(WEI Yuanlong，YANG Chunhe，GUO Yintong，et al. Experimental study on hydraulic fracture geometry of tight sandstone from Xujiahe group[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.1)：2 720-2 731.(in Chinese))
[12]	ZHAO Z，XIAO L，HE J，et al. Investigation of fracture propagation characteristics caused by hydraulic fracturing in naturally fractured continental shale[J]. Journal of Natural Gas Science and Engineering，2018，53：278-283.
[19]	CHUPRAKOV D，MELCHAEVA O，PRIOUL R. Injection-sensitive mechanics of hydraulic fracture interaction with discontinuities[J]. Rock Mechanics and Rock Engineering，2014，47(5)：1 625-1 640.