页岩水力裂缝网络形态及激活机制研究

doi:10.11885/j.issn.1674-5086.2020.09.24.01

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (6): 71-86.DOI: 10.11885/j.issn.1674-5086.2020.09.24.01

页岩水力裂缝网络形态及激活机制研究

王强¹, 赵金洲¹, 胡永全¹, 赵超能², 傅成浩³

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
2. 广西广投能源集团有限公司, 广西南宁 530201;
3. 中国石化江汉油田采油气工程技术服务中心, 湖北潜江 433124

收稿日期:2020-09-24 发布日期:2023-01-16
通讯作者: 王强,E-mail:402038424@qq.com
作者简介:王强,1990年生,男,汉族,四川绵阳人,助理研究员,主要从事非常规储层改造技术及理论研究。E-mail:402038424@qq.com
赵金洲,1962年生,男,汉族,湖北仙桃人,教授,博士生导师,主要从事油气田开采和增产新技术新理论方面的研究工作。E-mail:zhaojz@swpu.edu.cn
胡永全,1964年生,男,汉族,重庆璧山人,教授,主要从事非常规储层改造技术及理论研究。E-mail:stimswpi@163.com
赵超能,1991年生,男,侗族,广西崇左人,博士,主要从事储层改造与增产技术研究。E-mail:zhaochaoneng@qq.com
傅成浩,1991年生,男,汉族,湖北红安人,硕士,主要从事储层改造与增产技术研究。E-mail:974953833@qq.com
基金资助:
国家自然科学基金（51490653）；国家科技重大专项（2016ZX05060）

Investigation on the Morphology and Activation Mechanism of Hydraulic Fracture Network in Shale

WANG Qiang¹, ZHAO Jinzhou¹, HU Yongquan¹, ZHAO Chaoneng², FU Chenghao³

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Guangxi Guangtou Energy Group Co. Ltd., Nanning, Guangxi 530201, China;
3. Oil & Gas Production Engineering Technology Service Center, Jianghan Oilfield, SINOPEC, Qianjiang, Hubei 433124, China

Received:2020-09-24 Published:2023-01-16

摘要/Abstract

摘要： 针对页岩体积压裂后量化复杂裂缝网络构成及裂缝激活程度的问题，基于有限元、全局嵌入黏聚区域模型以及真实页岩露头，建立了预制结构弱面的复杂水力缝网模型。在考虑全耦合应力-流体影响下，研究了弱面逼近角、水平应力差、压裂液黏度以及排量对裂缝网络组成、几何形态以及SRV的影响，提出能够量化分析裂缝网络构成以及裂缝激活程度的裂缝相对激活程度概念。研究结果表明，页岩压后裂缝几何形态受力学性质最弱的弱面控制，分别呈轴对称与中心对称网络状分布；裂缝网络由主导游离气传输的弱面型裂缝与主导吸附气传输的基质型微裂缝共同构成；弱面逼近角、水平应力差以及压裂液黏度对SRV长轴的影响并非呈现单调性变化，逼近角的增加、水平应力差、压裂液黏度以及适当排量的降低会导致SRV短轴增加；水平应力差对裂缝相对激活程度的影响也并非呈现单调性变化，弱面逼近角、压裂液黏度以及排量的增加会引起基质型微裂缝相对激活程度、激活裂缝总长度的增加以及弱面型裂缝相对激活程度的降低。

关键词: 页岩, 水力压裂, 黏聚区域模型, 裂缝相对激活程度, 弱面

Abstract: Aiming at the problem of quantifying the composition of complex fracture network and fracture activation after shale volume fracturing, a complex fracture network model of weak surface of prefabricated structure is established based on finite element method, global embedded cohesive zone model and real shale outcrop. Considering the influence of fully coupled stress/fluid, the effects of weak plane azimuth, horizontal stress difference, fracturing fluid viscosity and displacement on fracture network composition, geometry and SRV are studied. The concept of fracture relative activation, which can quantitatively analyze fracture network composition and fracture activation, is proposed. The results show that the fracture geometry of two kinds of conjugated shale after compaction is controlled by the most weakly mechanical weak-plane, and the fracture network is respectively axisymmetric and centrosymmetric. The fracture network is composed of the weak-plane fractures with the dominant free gas transport and the matrix microfractures with the dominant adsorbed gas transport; the effects of weak-plane azimuth, horizontal stress difference and fracturing fluid viscosity on SRV length are not monotonous, while the increase of the azimuth, horizontal stress difference, fracturing fluid viscosity and the reduction of appropriate displacement will lead to the increase of SRV width; the effect of horizontal stress difference on the relative activation of fractures does not change monotonically, while the increase of weak-plane azimuth, fracturing fluid viscosity and displacement will lead to the increase of the relative activation of matrix microfractures, the increase of the total length of activated fractures and the decrease of the relative activation of weak-plane fractures.

Key words: shale, hydraulic fracturing, cohesive zone model, fracture relative activation, weak plane

中图分类号:

TE355

王强, 赵金洲, 胡永全, 赵超能, 傅成浩. 页岩水力裂缝网络形态及激活机制研究[J]. 西南石油大学学报(自然科学版), 2022, 44(6): 71-86.

WANG Qiang, ZHAO Jinzhou, HU Yongquan, ZHAO Chaoneng, FU Chenghao. Investigation on the Morphology and Activation Mechanism of Hydraulic Fracture Network in Shale[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 71-86.

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.1674-5086.2020.09.24.01

http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2022/V44/I6/71

参考文献

[1] 赵金洲, 任岚, 沈骋, 等. 页岩气储层缝网压裂理论与技术研究新进展[J]. 天然气工业, 2018, 38(3):1-14. doi:10.3787/j.issn.1000-0976.2018.03.001 ZHAO Jinzhou, REN Lan, SHEN Cheng, et al. Latest research progresses in network fracturing theories and technologies for shale gas reservoirs[J]. Natural Gas Industry, 2018, 38(3):1-14. doi:10.3787/j.issn.1000-0976.2018.03.001
[2] 王海洋, 卢义玉, 夏彬伟, 等. 射孔水压裂缝在层状页岩的扩展机制[J]. 中国石油大学学报(自然科学版), 2018, 42(2):95-101. doi:10.3969/j.issn.1673-5005.2018.02.011 WANG Haiyang, LU Yiyu, XIA Binwei, et al. Propagation mechanism of hydraulic fracture of perforation in laminated slate[J]. Journal of China University of Petroleum (Edition of Natural Science), 2018, 42(2):95-101. doi:10.3969/j.issn.1673-5005.2018.02.011
[3] 胥云, 雷群, 陈铭, 等. 体积改造技术理论研究进展与发展方向[J]. 石油勘探与开发, 2018, 45(5):874-887. doi:10.11698/PED.2018.05.14 XU Yun, LEI Qun, CHEN Ming, et al. Progress and development of volume stimulation techniques[J]. Petroleum Exploration and Development, 2018, 45(5):874-887. doi:10.11698/PED.2018.05.14
[4] 王洪建, 刘大安, 黄志全, 等. 层状页岩岩石力学特性及其脆性评价[J]. 工程地质学报, 2017, 25(6):1414-1423. doi:10.13544/j.cnki.jeg.2017.06.003 WANG Hongjian, LIU Da'an, HUANG Zhiquan, et al. Mechanical properties and brittleness evaluation of layered shale rock[J]. Journal of Engineering Geology, 2017, 25(6):1414-1423. doi:10.13544/j.cnki.jeg.2017.06.003
[5] 赵金洲, 沈骋, 任岚, 等. 页岩储层不同赋存状态气体含气量定量预测——以四川盆地焦石坝页岩气田为例[J]. 天然气工业, 2017, 37(4):27-33. doi:10.3787/j.issn.1000-0976.2017.04.004 ZHAO Jinzhou, SHEN Cheng, REN Lan, et al. Quantitative prediction of gas contents in different occurrence states of shale reservoirs:A case study of the Jiaoshiba shale gasfield in the Sichuan Basin[J]. Natural Gas Industry, 2017, 37(4):27-33. doi:10.3787/j.issn.1000-0976.2017.04.004
[6] BARENBLATT G I. The formation of equilibrium cracks during brittle fracture:General ideas and hypothesis, axially symmetric cracks[J]. Journal of Applied Mathematics and Mechanics, 1959, 23(3):622-636. doi:10.1016/0021-8928(59)90157-1
[7] MOKRYAKOV V. Analytical solution for propagation of hydraulic fracture with Barenblatt's cohesive tip zone[J]. International Journal of Fracture, 2011, 169(2):159-168. doi:10.1007/s10704-011-9591-0
[8] GUO Jianchun, LUO Bo, LU Cong, et al. Numerical investigation of hydraulic fracture propagation in a layered reservoir using the cohesive zone method[J]. Engineering Fracture Mechanics, 2017, 186:195-207. doi:10.1016/j.engfracmech.2017.10.013
[9] GUO Jianchun, ZHAO Xing, ZHU Haiyan, 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. doi:10.1016/j.jngse.2015.05.008
[10] WANG Hanyi. Numerical modeling of non-planar hydraulic fracture propagation in brittle and ductile rocks using XFEM with cohesive zone method[J]. Journal of Petroleum Science and Engineering, 2015, 135:127-140. doi:10.1016/j.petrol.2015.08.010
[11] TALEGHANI A D, GONZALEZ-CHAVEZ M, YU H, et al. Numerical simulation of hydraulic fracture propagation in naturally fractured formations using the cohesive zone model[J]. Journal of Petroleum Science and Engineering, 2018, 165:42-57. doi:10.1016/j.petrol.2018.01.063
[12] WANG Hanyi. HF propagation in naturally fractured reservoirs:Complex fracture or fracture networks[J]. Journal of Natural Gas Science and Engineering, 2019, 68:102911. doi:10.1016/j.jngse.2019.102911
[13] YU Hao, TALEGHANI A D, LIAN Zhanghua. On how pumping hesitations may improve complexity of hydraulic fractures, a simulation study[J]. Fuel, 2019, 249:294-308. doi:10.1016/j.fuel.2019.02.105
[14] LI Jianxiong, DONG Shiming, HUA Wen, et al. Numerical simulation of temporarily plugging staged fracturing (TPSF) based on cohesive zone method[J]. Computers and Geotechnics, 2020, 121:103453. doi:10.1016/-j.compgeo.2020.103453
[15] LIU Chuang, ZHANG Jianing, YU Hao, et al. New insights of natural fractures growth and stimulation optimization based on a three-dimensional cohesive zone model[J]. Journal of Natural Gas Science and Engineering, 2020, 76:103165. doi:10.1016/j.jngse.2020.103165
[16] YAO Yao. Linear elastic and cohesive fracture analysis to model hydraulic fracture in brittle and ductile rocks[J]. Rock Mechanics and Rock Engineering, 2012, 45(3):375-387. doi:10.1007/s00603-011-0211-0
[17] SUN Xiaohao, YU Luxia, RENTSCHLER M, et al. Delamination of a rigid punch from an elastic substrate under normal and shear forces[J]. Journal of the Mechanics and Physics of Solids, 2019, 122:141-160. doi:10.1016/j.jmps.2018.09.009
[18] TOMAR V, ZHAI J, ZHOU M. Bounds for element size in a variable stiffness cohesive finite element model[J]. International Journal for Numerical Methods in Engineering, 2004, 61(11):1894-1920. doi:10.1002/nme.1138
[19] KANNINEN M F, POPELAR C H. Advanced fracture mechanics[M]. 1st ed. Oxford:Oxford University Press, 1985.
[20] BIOT M A. General theory of three-dimensional consolidation[J]. Journal of Applied Physics, 1941, 12(2):155-164.
[21] BIOT M A. Theory of elasticity and consolidation for a porous anisotropic solid[J]. Journal of Applied Physics, 1955, 26(2):182-185. doi:10.1063/1.1721956
[22] KIM J, TCHELEPI H A, JUANES R. Stability and convergence of sequential methods for coupled flow and geomechanics:Drained and undrained splits[J]. Computer Methods in Applied Mechanics and Engineering, 2011, 200(23-24):2094-2116. doi:10.1016/j.cma.2011.02.011
[23] ZHOU Yushi, MA Xinfang, ZHANG Shicheng, et al. Numerical investigation into the influence of bedding plane on hydraulic fracture network propagation in shale formations[J]. Rock Mechanics and Rock Engineering, 2016, 49(9):3597-3614. doi:10.1007/s00603-016-1001-5
[24] ZHANG Shicheng, LEI Xin, ZHOU Yushi, et al. Numerical simulation of hydraulic fracture propagation in tight oil reservoirs by volumetric fracturing[J]. Petroleum Science, 2015, 12(4):674-682. doi:10.1007/s12182-015-0055-4
[25] BLANTON T L. An experimental study of interaction between hydraulically induced and pre-existing fractures[C]. SPE 10847-MS, 1982. doi:10.2118/10847-MS
[26] 任岚, 林然, 赵金洲, 等. 页岩气水平井增产改造体积评价模型及其应用[J]. 天然气工业, 2018, 38(8):47-56. doi:10.3787/j.issn.1000-0976.2018.08.007 REN Lan, LIN Ran, ZHAO Jinzhou, et al. A stimulated reservoir volume (SRV) evaluation model and its application to shale gas well productivity enhancement[J]. Natural Gas Industry, 2018, 38(8):47-56. doi:10.3787/j.issn.1000-0976.2018.08.007

页岩水力裂缝网络形态及激活机制研究

Investigation on the Morphology and Activation Mechanism of Hydraulic Fracture Network in Shale

RichHTML

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]	钟显康, 李浩男, 扈俊颖. 页岩气开采与集输过程中腐蚀问题与现状分析[J]. 西南石油大学学报(自然科学版), 2022, 44(6): 162-174.
[2]	左罗, 仲冠宇, 蒋廷学, 王海涛. 页岩微观结构及力学特征变化规律研究[J]. 西南石油大学学报(自然科学版), 2022, 44(5): 125-134.
[3]	赵圣贤, 刘勇, 冯江荣, 范存辉, 季春海. 长宁地区富有机质页岩脆性及与裂缝发育关系[J]. 西南石油大学学报(自然科学版), 2022, 44(4): 1-13.
[4]	陈迟, 郭建春, 路千里, 慈建发. 致密气藏多尺度支撑机理研究与应用[J]. 西南石油大学学报(自然科学版), 2022, 44(3): 131-138.
[5]	覃建华, 杨琨, 丁艺, 张博宁, 唐慧莹. 基于KL-E的地质力学模型参数反演及应用[J]. 西南石油大学学报(自然科学版), 2022, 44(2): 65-78.
[6]	白杨, 李道雄, 李文哲, 李宏波, 罗平亚. 长宁区块龙马溪组水平段井壁稳定钻井液技术[J]. 西南石油大学学报(自然科学版), 2022, 44(2): 79-88.
[7]	梁兴, 单长安, 蒋佩, 张朝, 朱斗星. 浅层页岩气井全生命周期地质工程一体化应用[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 1-18.
[8]	惠钢, 陈胜男, 王海, 顾斐. 基于改进残差的神经网络方法预测页岩气甜点[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 19-32.
[9]	吴承美, 许长福, 陈依伟, 谭强, 徐田录. 吉木萨尔页岩油水平井开采实践[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 33-41.
[10]	李俊乾, 卢双舫, 李文镖, 蔡建超. 基于过程分析法的页岩原位含气性评价[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 42-55.
[11]	田振华, 周尚文, 李俊乾, 蔡建超. 基于气体扩散模型的页岩气体散失规律研究[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 56-65.
[12]	高艳玲, 吴克柳, 陈掌星, 田伟兵, 李靖. 页岩储层两相流体润湿滞后对流动阻力的影响[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 66-72.
[13]	杨永飞, 刘夫贵, 姚军, 宋华军, 王民. 基于生成对抗网络的页岩三维数字岩芯构建[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 73-83.
[14]	盛广龙, 黄罗义, 赵辉, 饶翔, 马嘉令. 页岩气藏压裂缝网扩展流动一体化模拟技术[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 84-96.
[15]	陈依伟, 周玉辉, 梁成钢, 徐田录, 何永清. 页岩油水平井产量变化定量表征模型[J]. 西南石油大学学报(自然科学版), 2021, 43(5): 97-103.