Time Effects of Stress Sensitivity in Shale Reservoirs

doi:10.11885/j.issn.1674-5086.2022.10.31.01

Abstract

Abstract: The effective stress and its action time are important external factors controlling the deformation of pores and fractures in rock. The characteristics of multi-scale pore structure and pore fracture configuration make the stress sensitive time effect of shale reservoirs special. However, the influence of effective stress loading and unloading time on the stress sensitive behavior of shale reservoirs has not been considered in previous studies. In this paper, the Longmaxi Formation shale gas reservoir in Weirong Gas Field, south Sichuan is taken as the research area. The shale samples with different development degrees of pores and fractures are drilled, and the experiment of the influence of variable loading and unloading sustained stability time on permeability of rock samples under variable effective stress is designed and tested. The results show that: 1) when the effective stress loading from 5 MPa to 35 MPa, the permeability of micro fracture sample and matrix sample decreases by 66.82% and 27.19%, respectively, 74.73% and 79.82% recovery rate of permeability during unloading. The lower the shale permeability is, the more significant the effective stress hysteresis effect is. 2) when the continuous stability time of constant effective stress loading is extended from 2.5 h to 10.0 h, and stress sensitivity index increases by 3.76%~80.17%. and the time effect is more significant when the effective stress is small. It is concluded that shale composition and multi-scale pore structure are the main reasons for the difference of pore deformation behavior. Based on the experimental results, the effective stress loading pretreatment time of shale samples is determined to be 6 h, and some suggestions are put forward to optimize the experimental scheme of shale reservoir sensitivity evaluation and optimize the working system of gas wells.

Key words: shale, stress sensitivity, multi-scale pore and fracture structure, time effect, effective stress, permeability

CLC Number:

TE122.2

KANG Yili, LAI Zhehan, CHEN Mingjun, WU Jianjun, LI Bing. Time Effects of Stress Sensitivity in Shale Reservoirs[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(1): 53-63.

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References

[1] 邹才能，杨智，朱如凯，等. 中国非常规油气勘探开发与理论技术进展[J]. 地质学报， 2015， 89(6):979-1007. doi:10.3969/j.issn.0001-5717.2015.06.001 ZOU Caineng, YANG Zhi, ZHU Rukai, et al. Progress in China's unconventional oil & gas exploration and development and theoretical technologies[J]. Acta Geologica Sinica, 2015, 89(6): 979–1007. doi: 10.3969/j.issn.0001-5717.2015.06.001
[2] 陈明君，康毅力，张廷山，等. 页岩气多尺度传质特征及过程协调机制研究[J]. 中国科学（技术科学)， 2018， 48(5):473-487. doi:10.1360/N092017-00202 CHEN Mingjun, KANG Yili, ZHANG Tingshan, et al. Characteristics of multiscale mass transport and coordination mechanisms for shale gas[J]. Scientia Sinica (Technologica), 2018, 48(5): 473–487. doi: 10.1360/N092017-00202
[3] WU Keliu, LI Xiangfang, GUO Chaohua, et al. A unified model for gas transfer in nanopores of shale-gas reservoirs: Coupling pore diffusion and surface diffusion[J]. SPE Journal, 2016, 21(5): 1583–1611. doi: 10.2118/2014-1921039-PA
[4] 田巍，邓瑞健，朱维耀，等. 页岩压裂缝网储层应力敏感性及对产能的影响[J]. 油气藏评价与开发， 2017， 7(6):71-77. doi:10.3969/j.issn.2095-1426.2017.06.013 TIAN Wei, DENG Ruijian, ZHU Weiyao, et al. Stress sensitivity of shale reservoir fracture network and its effect on productivity[J]. Reservoir Evaluation and Development, 2017, 7(6): 71–77. doi: 10.3969/j.issn.2095-1426.2017.06.013
[5] 朱维耀，马东旭. 页岩储层有效应力特征及其对产能的影响[J]. 天然气地球科学， 2018， 29(6):845-852. doi:10.11764/j.issn.1672-1926.2018.05.018 ZHU Weiyao, MA Dongxu. Effective stress characteristics in shale and its effect on productivity[J]. Natural Gas Geoscience, 2018, 29(6): 845–852. doi: 10.11764/j.issn.1672-1926.2018.05.018
[6] JELMERT T A, SELSENG H. Permeability function describes core permeability in stress-sensitive rocks[J]. Oil and Gas Journal, 1998, 96(49): 60–63.
[7] JONES F O. A laboratory study of the effects of confining pressure on fracture flow and storage capacity in carbonate rocks[J]. Journal of Petroleum Technology, 1975, 27(1): 21–27. doi: 10.1016/0148-9062(75)90027-3
[8] 张浩，康毅力，陈一健，等. 岩石组分和裂缝对致密砂岩应力敏感性影响[J]. 天然气工业， 2004， 24(7):55-57. doi:10.3321/j.issn:1000-0976.2004.07.017 ZHANG Hao, KANG Yili, CHEN Yijian, et al. Influence of the rock components and fractures on tight sandstone stress sensitivity[J]. Natural Gas Industry, 2004, 24(7): 55–57. doi: 10.3321/j.issn:1000-0976.2004.07.017
[9] 兰林，康毅力，陈一健，等. 储层应力敏感性评价实验方法与评价指标探讨[J]. 钻井液与完井液， 2005， 22(3):1-4. doi:10.3969/j.issn.1001-5620.2005.03.001 LAN Lin, KANG Yili, CHEN Yijian, et al. Discussion on evaluation methods for stress sensitivities of low permeability and tight sandstone reservoirs[J]. Drilling Fluid & Completion Fluid, 2005, 22(3): 1–4. doi: 10.3969/j.issn.1001-5620.2005.03.001
[10] 何健，康毅力，刘大伟，等. 孔隙型与裂缝—孔隙型碳酸盐岩储层应力敏感研究[J]. 钻采工艺， 2005， 28(2):84-86. doi:10.3969/j.issn.1006-768X.2005.02.027 HE Jian, KANG Yili, LIU Dawei, et al. Stress sensitivity research on porous and fractured porous carbonate reservoirs[J]. Drilling & Production Technology, 2005, 28(2): 84–86. doi: 10.3969/j.issn.1006-768X.2005.02.027
[11] 景岷雪，袁小玲. 碳酸盐岩岩心应力敏感性实验研究[J]. 天然气工业， 2002， 22(S1):114-117. doi:10.3321/j.issn:1000-0976.2002.z1.029 JING Minxue, YUAN Xiaoling. Experimental research on core stress sensitivity of carbonate rock[J]. Natural Gas Industry, 2002, 22(S1): 114–117. doi: 10.3321/j.issn:1000-0976.2002.z1.029
[12] 王业众，康毅力，张浩，等. 碳酸盐岩应力敏感性对有效应力作用时间的响应[J]. 钻采工艺， 2007， 30(3):105-107. doi:10.3969/j.issn.1006-768X.2007.03.035 WANG Yezhong, KANG Yili, ZHANG Hao, et al. Responses of carbonatite stress sensitivity to loading time under effective pressure[J]. Drilling & Production Technology, 2007, 30(3): 105–107. doi: 10.3969/j.issn.1006-768X.2007.03.035
[13] SHAO Jiaxin, YOU Lijun, KANG Yili, et al. Experimental study on stress sensitivity of underground gas storage[J]. Journal of Petroleum Science and Engineering, 2020, 195: 107577. doi: https://doi.org/10.1016/j.petrol.2020.107577
[14] CHEN Mingjun, KANG Yili, ZHANG Tinshan, et al. Methane diffusion in shales with multiple pore sizes at supercritical conditions[J]. Chemical Engineering Journal, 2018, 334: 1455–1465. doi: 10.1016/j.cej.2017.11.082
[15] CHEN Mingjun, KANG Yili, ZHANG Tinshan, et al. Methane adsorption behavior on shale matrix at in-situ pressure and temperature conditions: Measurement and modeling[J]. Fuel, 2018, 228: 39–49. doi: 10.1016/j.fuel.2018.04.145
[16] 吴建发，樊怀才，张鉴，等. 页岩人工裂缝应力敏感性实验研究——以川南地区龙马溪组页岩为例[J]. 天然气工业， 2022， 42(2):71-81. doi:10.3787/j.issn.1000-0976.2022.02.008 WU Jianfa, FAN Huaicai, ZHANG Jian, et al. An experimental study on stress sensitivity of hydraulic fractures in shale: A case study on Longmaxi Formation shale in the southern Sichuan Basin[J]. Natural Gas Industry, 2022, 42(2): 71–81. doi: 10.3787/j.issn.1000-0976.2022.02.008
[17] 康毅力，赖哲涵，陈明君，等. 基于压力衰减法的页岩气体扩散系数应力敏感性实验[J]. 天然气工业，2022，42(2):59-70. doi:10.3787/j.issn.1000-0976.2022.02.007 KANG Yili, LAI Zhehan, CHEN Mingjun, et al. Stress sensitivity experiments of shale gas diffusion coefficients based on the pressure decay method[J]. Natural Gas Industry, 2022, 42(2): 59–70. doi: 10.3787/j.issn.1000-0976.2022.02.007
[18] DONG J J, HSU J Y, WU W J, et al. Stress-dependence of the permeability and porosity of sandstone and shale from TCDP Hole-A[J]. International Journal of Rock Mechanics & Mining Sciences, 2010, 47(7): 1141–1157. doi: 10.1016/j.ijrmms.2010.06.019
[19] 何金钢，康毅力，游利军，等. 流体损害对页岩储层应力敏感性的影响[J]. 天然气地球科学， 2011， 22(5):915-919. HE Jingang, KANG Yili, YOU Lijun, et al. Effects of mineral composition and microstructure on stress-sensitivity of mudrocks[J]. Natural Gas Geoscience, 2011, 22(5): 915–919.
[20] 刘华，王卫红，陈明君，等. 涪陵龙马溪组页岩储层应力敏感实验研究[J]. 石化技术， 2019， 26(5):155-158. doi:10.3969/j.issn.1006-0235.2019.05.095 LIU Hua, WANG Weihong, CHEN Mingjun, et al. Research on the stress sensitivity experiment of Fuling Longmaxi shale reservoirs[J]. Petrochemical Industry Technology, 2019, 26(5): 155–158. doi: 10.3969/j.issn.1006-0235.2019.05.095
[21] 康毅力，白佳佳，李相臣，等. 水岩作用对富有机质页岩应力敏感性的影响——以渝东南地区龙马溪组页岩为例[J]. 油气藏评价与开发， 2019， 9(5):54-62. doi:10.3969/j.issn.2095-1426.2019.05.007 KANG Yili, BAI Jiajia, LI Xiangchen, et al. Influence of water-rock interaction on stress sensitivity of organicrich shales: A case study from Longmaxi Formation in the southeast area of Chongqing[J]. Reservoir Evaluation and Development, 2019, 9(5): 54–62. doi: 10.3969/j.issn.2095-1426.2019.05.007
[22] 庞铭，陈华兴，唐洪明，等. 基于裂缝重构评价酸蚀对碳酸盐岩应力敏感性的影响[J]. 特种油气藏， 2022， 29(1):107-113. doi:10.3969/j.issn.1006-6535.2022.01.016 PANG Ming, CHEN Huaxing, TANG Hongming, et al. Evaluation of the effect of acid erosion on stress sensitivity of carbonate rocks based on fracture reconstruction[J]. Special Oil & Gas Reservoirs, 2022, 29(1): 107–113. doi: 10.3969/j.issn.1006-6535.2022.01.016
[23] 邓航，田巍. 储层条件下的应力敏感性研究[J]. 断块油气田， 2023， 30(6):933-939. doi:10.6056/dkyqt202306007 DENG Hang, TIAN Wei. Study on stress sensitivity under reservoir conditions[J]. Fault-Block Oil and Gas Field, 2023, 30(6): 933–939. doi: 10.6056/dkyqt202306007
[24] 曹耐，雷刚. 致密储集层加压—卸压过程应力敏感性[J]. 石油勘探与开发， 2019， 46(1):132-138. doi:10.11698/PED.2019.01.13 CAO Nai, LEI Gang. Stress sensitivity of tight reservoirs during pressure loading and unloading process[J]. Petroleum Exploration and Development, 2019, 46(1): 132-138. doi: 10.11698/PED.2019.01.13
[25] 张萍，杨春和，汪虎，等. 页岩单轴压缩应力—应变特征及能量各向异性[J]. 岩土力学， 2018， 39(6):2106-2114. doi:10.16285/j.rsm.2016.1824 ZHANG Ping, YANG Chunhe, WANG Hu, et al. Stressstrain characteristics and anisotropy energy of shale under uniaxial compression[J]. Rock and Soil Mechanics, 2018, 39(6): 2106–2114. doi: 10.16285/j.rsm.2016.1824
[26] 张慧，李贵红，晋香兰. 南方下古生界页岩中有机质赋存状态及其成因[J]. 煤田地质与勘探， 2018， 46(1):51-55. doi:10.3969/j.issn.1001-1986.2018.01.009 ZHANG Hui, LI Guihong, JIN Xianglan. Organic matters and their occurrence state in Lower Paleozoic shale in south China[J]. Coal Geology & Exploration, 2018, 46(1): 51–55. doi: 10.3969/j.issn.1001-1986.2018.01.009
[27] 李传亮，孔祥言，徐献芝，等. 多孔介质的双重有效应力[J]. 自然杂志， 1999， 21(5):288-292. doi:10.3969/j.issn.0253-9608.1999.05.012 LI Chuanliang, KONG Xiangyan, XU Xianzhi, et al. Double effective stress of porous media[J]. Nature Magazine, 1999, 21(5): 288–292. doi: 10.3969/j.issn.0253-9608.1999.05.012
[28] 雷刚，董平川，杨书，等. 基于岩石颗粒排列方式的低渗透储层应力敏感性分析[J]. 岩土力学， 2014， 35(S1):209-214. LEI Gang, DONG Pingchuan, YANG Shu, et al. Study of stress-sensitivity of low-permeability reservoir based on arrangement of particles[J]. Rock and Soil Mechanics, 2014, 35(S1): 209–214.
[29] 王一帆，黄东安，闫博，等. 考虑弹塑性变形机制的储层天然裂缝闭合模型[J]. 大庆石油地质与开发， 2017， 36(1):75-80. doi:10.3969/J.ISSN.1000-3754.2017.01.013 WANG Yifan, HUANG Dong'an, YAN Bo, et al. Closed model of the reservoir natural fracture considering the elastic-plastic deforming mechanism[J]. Petroleum Geology and Oilfield Development in Daqing, 2017, 36(1): 75–80. doi: 10.3969/J.ISSN.1000-3754.2017.01.013
[30] 丁景辰，杨胜来，胡伟，等. 致密气藏应力敏感性实验[J]. 大庆石油地质与开发， 2014， 33(3):170-174. doi:10.3969/J.ISSN.1000-3754.2014.03.036 DING Jingchen, YANG Shenglai, HU Wei, et al. Indoor experiment in the stress sensitivity for tight gas reservoir[J]. Petroleum Geology and Oilfield Development in Daqing, 2014, 33(3): 170–174. doi: 10.3969/J.ISSN.1000-3754.2014.03.036
[31] 国家能源局. 储层敏感性流动实验评价方法:SY/T 5358-2010[S]. 北京:中国标准出版社， 2010. National Energy Administration. Formation damage evaluation by flow test: SY/T5358-2010[S]. Beijing: Standards Press of China, 2010.
[32] 陈学忠，郑健，刘梦云，等. 页岩气井精细控压生产技术可行性研究与现场试验[J]. 钻采工艺， 2022， 45(3):79-83. doi:10.3969/J.ISSN.1006-768X.2022.03.14 CHEN Xuezhong, ZHENG Jian, LIU Mengyun, et al. Feasibility study and field trail of precise managed pressure production technology for shale gas wells[J]. Drilling & Production Technology, 2022, 45(3): 79–83. doi: 10.3969/J.ISSN.1006-768X.2022.03.14
[33] 于洋，尹强，叶长青，等. 精细控压生产技术在宁209H49平台的应用[J]. 天然气与石油， 2022， 40(2):32-37. doi:10.3969/j.issn.1006-5539.2022.02.006 YU Yang, YIN Qiang, YE Changqing, et al. Application of precision pressure control production technology in Ning 209H49 platform[J]. Natural Gas and Oil, 2022, 40(2): 32–37. doi: 10.3969/j.issn.1006-5539.2022.02.006