Petroleum Reservoir Evaluation and Development >
2022 , Vol. 12 >Issue 6: 894 - 901
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2022.06.008
Single-connected analytical model analysis of stress field response of geothermal reservoirs induced by staged fracturing
Received date: 2022-06-30
Online published: 2022-12-02
The stress field response of the geothermal reservoir induced by staged fracturing will have a direct impact on the wellbore integrity and casing deformation of the geothermal reservoir. Studying the stress field response of the geothermal reservoir induced by staged fracturing is important to guide the field fracturing. significance. At present, fracture mechanics is generally used to solve the stress field response induced by hydraulic fracturing. However, the stress field response of geothermal reservoirs induced by staged fracturing is essentially the problem of stress interference between fractures under the action of heat-fluid-solid coupling, which makes this problem difficult to solve. Fracture mechanics solutions are extremely complex. In view of this, the continuity assumption was introduced to transform this fracture mechanics problem into an elastic mechanics problem, and a single-connected analytical model of the stress field response of geothermal reservoirs induced by staged fracturing was established, which greatly reduced the difficulty of solving, and the stress field response after field fracturing can be analyzed more simply and effectively. Based on ABAQUS, a staged fracturing thermal-fluid-solid coupling numerical model for geothermal reservoirs was established, and the error of the analytical model was verified to be within 5 % by comparing the average stress in the x and y directions. Then, using the analytical model, the effects of cluster number, temperature difference and natural fractures on the stress field of geothermal reservoirs are discussed. The results show that as the number of clusters increases, the stress component in the x-direction increases and the stress component in the y-direction decreases in the geothermal reservoir; as the temperature difference increases, the stress components in the x and y directions in the geothermal reservoir increase accordingly; as the density of natural fractures increases, the stress component in the x-direction increases and the stress component in the y-direction decreases in the geothermal reservoir.
Wei WANG , Shaoying CHEN , Qingchun YANG , Heping LIU , Lisong ZHANG . Single-connected analytical model analysis of stress field response of geothermal reservoirs induced by staged fracturing[J]. Petroleum Reservoir Evaluation and Development, 2022 , 12(6) : 894 -901 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.06.008
| [1] | 陈作, 许国庆, 蒋漫旗. 国内外干热岩压裂技术现状及发展建议[J]. 石油钻探技术, 2019, 47(6): 1-8. |
| [1] | CHEN Zuo, XU Guoqing, JIANG Manqi. The current status and development recommendations for dry hot rock fracturing technologies at home and abroad[J]. Petroleum Drilling Techniques, 2019, 47(6): 1-8. |
| [2] | 雷群, 翁定为, 管保山, 等. 基于缝控压裂优化设计的致密油储集层改造方法[J]. 石油勘探与开发, 2020, 47(3): 592-599. |
| [2] | LEI Qun, WENG Dingwei, GUAN Baoshan, et al. A novel approach of tight oil reservoir stimulation based on fracture controlling optimization and design[J]. Petroleum Exploration and Development, 2020, 47(3): 592-599. |
| [3] | YANG S Y, HAN L H, WANG J J, et al. Laboratory study on casing deformation during multistage horizontal well fracturing in shale gas development and strain based casing design[J]. Journal of Natural Gas Science and Engineering, 2021, 89(3): 103893. |
| [4] | 赵延林, 王卫军, 赵阳升, 等. 双重介质热-水-力三维耦合模型及应用[J]. 中国矿业大学学报, 2010, 39(5): 709-715. |
| [4] | ZHAO Yanlin, WANG Weijun, ZHAO Yangsheng, et al. 3D dual medium model of thermal-hydro-mechanical coupling and its application[J]. Journal of China University of Mining & Technology, 2010, 39(5): 709-715. |
| [5] | 李勇明, 王琰琛, 赵金洲, 等. 考虑多缝应力干扰的页岩储层压裂转向角计算模型[J]. 天然气地球科学, 2015, 26(10): 1979-1983. |
| [5] | LI Yongming, WANG Yanchen, ZHAO Jinzhou, et al. Calculation model of kink angle in shale gas reservoirs with consideration of stress interference[J]. Natural Gas Geoscience, 2015, 26(10): 1979-1983. |
| [6] | 聂荣国, 蔡明杰, 毛良杰, 等. 压裂工况对页岩气套管应力分布的影响[J]. 石油机械, 2019, 47(12): 139-146. |
| [6] | NIE Rongguo, CAI Mingjie, MAO Liangjie, et al. Effect of fracturing conditions on the stress distribution of shale gas well casing[J]. China Petroleum Machinery, 2019, 47(12): 139-146. |
| [7] | 邵尚奇, 陈凯, 丁文刚, 等. 水力裂缝周围应力场解析模型及应力扰动分析[J]. 石油机械, 2018, 46(2): 108-114. |
| [7] | SHAO Shangqi, CHEN Kai, DING Wengang, et al. Stress field analytical model and stress perturbation analysis around hydraulic cracks[J]. China Petroleum Machinery, 2018, 46(2): 108-114. |
| [8] | 王宇, 李晓, 王金波, 等. 水力压裂中的应力阴影效应与数值计算[J]. 天然气地球科学, 2015, 26(10): 1941-1950. |
| [8] | WANG Yu, LI Xiao, WANG Jinbo, et al. Numerical modeling of stress shadow effect on hydraulic fracturing[J]. Natural Gas Geoscience, 2015, 26(10): 1941-1950. |
| [9] | 刘文政, 姚军, 曾青冬. 考虑温度场影响的水力裂缝扩展数值模拟[C]// 2019油气田勘探与开发国际会议论文集. 西安: 西安石油大学出版社, 2019: 2785-2799. |
| [9] | LIU Wenzheng, YAO Jun, ZENG Qingdong. Numerical simulation of hydraulic fracture propagation coupled with temperature field[C]// Proceedings of the 2019 International Field Exploration and Development Conference. Xi’an: Xi’an Shiyou University Press, 2019: 2785-2799. |
| [10] | 马许平, 曾庆利. 多射孔压裂对水力裂缝扩展规律的影响[J]. 天然气地球科学, 2022, 33(2): 312-323. |
| [10] | MA Xuping, ZENG Qingli. Influence of multi-perforation fracturing on the regularity of hydraulic fractures propagation[J]. Natural Gas Geoscience, 2022, 33(2): 312-323. |
| [11] | 张建国, 程远方, 张卫防. 水平井多段压裂裂缝同步扩展应力干扰分析[J]. 中国石油大学胜利学院学报, 2021, 35(2): 20-23. |
| [11] | ZHANG Jianguo, CHENG Yuanfang, ZHANG Weifang. Analysis of synchronous propagation of multi-cluster fractures in horizontal section[J]. Journal of Shengli College China University of Petroleum, 2021, 35(2): 20-23. |
| [12] | 孙可明, 张宇. 缝网间距对高温岩体储留层温度影响规律模拟[J]. 吉林大学学报(地球科学版), 2019, 49(6): 1723-1731. |
| [12] | SUN Keming, ZHANG Yu. Simulation of influence of fracture-network spacing on temperature of HDR geothermal reservoirs[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(6): 1723-1731. |
| [13] | 刘立峰, 张士诚. 通过改变近井地应力场实现页岩储层缝网压裂[J]. 石油钻采工艺, 2011, 33(4): 71-74. |
| [13] | LIU Lifeng, ZHANG Shicheng. Net fracturing by changing the surrounding in-situ stress in shale reservoirs[J]. Oil Drilling & Production Technology, 2011, 33(4): 71-74. |
| [14] | 邓燕, 尹建, 郭建春. 水平井多段压裂应力场计算新模型[J]. 岩土力学, 2015, 36(3): 660-666. |
| [14] | DENG Yan, YIN Jian, GUO Jianchun. A new calculation model for stress field due to horizontal well staged fracturing[J]. Rock and Soil Mechanics, 2015, 36(3): 660-666. |
| [15] | KIM J, MORIDIS G J. Development of the T+M coupled flow-geomechanical simulator to describe fracture propagation and coupled flow-thermal-geomechanical processes in tight/shale gas systems[J]. Computers & Geosciences, 2013, 60: 184-198. |
| [16] | PALMER I D. Induced stresses due to propped hydraulic fracture in coalbed methane wells[C]// Paper SPE-25861-MS presented at the Low Permeability Reservoirs Symposium, Denver, Colorado, April 1993. |
| [17] | ROUSSEL N P, SHARMA M M. Optimizing fracture spacing and sequencing in horizontal-well fracturing[J]. SPE Production & Operations, 2011, 26(2): 173-184. |
| [18] | HOSSEINI S M, BAGHERI R, MONFARED M M. Transient response of several cracks in a nonhomogeneous half-layer bonded to a magneto-electro-elastic coating[J]. Theoretical and Applied Fracture Mechanics, 2020, 110: 102821. |
| [19] | KRESSE O, WENG X W, GU H R, et al. Numerical modeling of hydraulic fractures interaction in complex naturally fractured formations[J]. Rock Mechanics & Rock Engineering, 2013, 46(3): 555-568. |
| [20] | PEIRCE A, BUNGER A. Interference fracturing: nonuniform distributions of perforation clusters that promote simultaneous growth of multiple hydraulic fractures[J]. SPE Journal, 2015, 20(2): 384-395. |
| [21] | 于永军, 朱万成, 李连崇, 等. 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. |
| [21] | YU Yongjun, ZHU Wancheng, LI Lianchong, et al. Analysis on stress shadow of mutual interference of fractures in hydraulic fracturing engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(12): 2926-2939. |
| [22] | 许建国. 致密砂岩油气藏体积压裂缝间应力干扰分析研究[D]. 青岛: 中国石油大学(华东), 2019. |
| [22] | XU Jianguo. Fractures’ stress interference research of tight sandstone reservoirs’ volume fracturing[D]. Qingdao: China University of Petroleum(East China), 2019. |
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