准噶尔盆地中佳地区砾岩储层应力敏感性特征及微观作用机制

Characteristics and microscopic mechanisms of stress sensitivity of conglomerate reservoirs in Zhongjia Area of Junggar Basin

摘要

以准噶尔盆地中佳地区砾岩储层为研究对象，采用宏观实验、微观成像及 CT 扫描技术，研究砾岩储层的应力敏感性特征及微观作用机制，揭示在无人造裂缝、非支撑裂缝发育和支撑裂缝发育状态下岩心渗透率的应力敏感性变化规律。结果表明：在 2 \sim 55 \mathrm{M} \mathrm{P} \mathrm{a} 围压加载过程中，无人造裂缝、非支撑裂缝和支撑裂缝岩心的平均应力敏感性损害率分别为 94.59% 、 98.65% 和 90.82% ，其中非支撑裂缝岩心对压力最为敏感。渗透率随围压上升而显著下降，围压为 2 \sim 10 MPa 时，无人造裂缝和非支撑裂缝岩心渗透率下降幅度最大，拐点围压约为 10 MPa ；支撑裂缝岩心的渗透率下降趋势较缓，拐点围压上移至 40 MPa 。在高应力条件下，裂缝闭合、孔喉尺寸减小、连通性变差是导致渗透率持续下降的主要因素。该结果为致密油藏的压裂参数设计和开发方案优化提供技术支持。

Abstract

Taking conglomerate reservoir in Zhongjia Area of Junggar Basin as the research object, macroscopic experiments, microscopic imaging and CT scanning techniques were used to study the stress sensitivity characteristics and microscopic action mechanism of conglomerate reservoir, and to reveal the changing law of stress sensitivity of the permeability of the cores under the state of no man-made fracture, non-supported fracture development and supported fracture development. The results show that during the loading process of 2-55MPa peripheral pressure, the average stress sensitivity damage rates of the core without man-made fractures, the core with non-supported fractures and the core with supported fractures are 94.59%,98.65% and 90.82%, respectively, among which the core with non-suppor-ted fractures is the most sensitive to pressure. The permeability decreased significantly with the increase of the peripheral pressure, and the permeability of the unman-made fractured and unsupported fractured cores decreased the most within 2-10MPa, with the inflection point peripheral pressure about 10 MPa ; the permeability of the supported fractured cores showed a slower decreasing trend, with the inflection point peripheral pressure shifted upward to 40 MPa. Under the high stress condition, the fracture closure, the pore throat size reduction, and the deterioration of the connectivity were the main causes of the sustained decrease of the permeability. The results of the study can provide important technical support for the design of fracturing parameters and optimisation of development schemes in tight reservoirs.

关键词

砾岩储层 / 应力敏感性 / 微观作用机制 / CT 扫描技术 / 致密油藏 / 中佳地区 / 准噶尔盆地

Key words

conglomerate reservoirs / stress sensitivity / microscopic mechanisms / CT scanning technology / tight oil reservoir / Zhongjia Area / Junggar Basin

参考文献

[1] 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.

[2] DENG Hang, TIAN Wei. Study on stress sensitivity under reservoir conditions[J]. Fault-Block Oil & Gas Field, 2023, 30(6): 933-939.

[3] 杨川, 吴涛, 李啸, 等. 准噶尔盆地中拐凸起佳木河组储集层物性实测值校正[J]. 新疆石油地质, 2021, 42(6):749-755.

[4] YANG Chuan, WU Tao, LI Xiao, et al. Correction of measured reservoir physical properties of Jiamuhe Formation in Zhongguai Uplift of Junggar Basin[J]. Xinjiang Petroleum Geology, 2021, 42(6):749-755.

[5] 刘晓旭, 胡勇, 朱斌, 等. 储层应力敏感性影响因素研究[J]. 特种油气藏, 2006, 13(3):18-21.

[6] LIU Xiaoxu, HU Yong, ZHU Bin, et al. Influential factor analysis of reservoir stress sensitivity[J]. Special Oil & Gas Reservoirs, 2006, 13(3):18-21.

[7] 罗强, 李明, 李凯, 等. 砂砾岩油藏原位乳化提高采收率实验研究[J]. 特种油气藏, 2023, 30(1):100-106.

[8] LUO Qiang,LI Ming,LI Kai,et al. Experimental study on in-situ emulsification enhanced oil recovery of glutenite oil reservoir[J]. Special Oil & Gas Reservoirs, 2023, 30(1):100-106.

[9] 窦宏恩, 张虎俊, 姚尚林, 等. 致密储集层岩石应力敏感性测试与评价方法[J]. 石油勘探与开发, 2016, 43(6):1022-1028.

[10] DOU Hongen, ZHANG Hujun, YAO Shanglin, et al. Measurement and evaluation of the stress sensitivity in tight reservoirs[J]. Petroleum Exploration and Development, 2016, 43(6):1022-1028.

[11] TAN Q, KANG Y, YOU L, et al. Stress-sensitivity mechanisms and its controlling factors of saline-lacustrine fractured tight carbonate reservoir[J]. Journal of Natural Gas Science and Engineering, 2021,88:103864.

[12] 王长权, 田中敬, 王晨晨, 等. 基于应力敏感的致密油藏孔隙结构及油水两相渗流特征[J]. 特种油气藏, 2023, 30(4):131-138.

[13] WANG Changquan, TIAN Zhongjing, WANG Chenchen, et al. Pore structure and oil-water two-phase seepage characteristics of tight oil reservoirs based on stress sensitivity[J]. Special Oil & Gas Reservoirs, 2023, 30(4):131-138.

[14] LIU K, YIN D, SUN Y. The mathematical model of stress sensitivities on tight reservoirs of different sedimentary rocks and its application[J]. Journal of Petroleum Science and Engineering, 2020,193:107372.

[15] 熊健, 朱梦渊, 刘伟, 等. 深层致密储层人工裂缝应力敏感性影响因素[J]. 天然气地球科学, 2024, 35(4):563-572.

[16] XIONG Jian, ZHU Mengyuan, LIU Wei, et al. Factors influencing stress sensitivity of artificial fractures in deep tight reservoirs[J]. Natural Gas Geoscience, 2024, 35(4):563-572.

[17] MAHMOODPOUR S, SINGH M, TURAN A, et al. Simulations and global sensitivity analysis of the thermo-hydraulic-mechanical processes in a fractured geothermal reservoir[J]. Energy, 2022,247:123511.

[18] 郝红永, 徐常晫, 郭晟豪, 等. 砂砾岩压缩破坏形态及影响因素分析[J]. 东北石油大学学报, 2022, 46(3):66-73.

[19] HAO Hongyong, XU Changzhuo, GUO Shenghao, et al. Analysis on compression failure characteristics and influencing factors of conglomerate[J]. Journal of Northeast Petroleum University, 2022, 46(3):66-73.

[20] 唐慧莹, 梁海鹏, 张烈辉, 等. 砾岩储层水力裂缝扩展形态及影响因素[J]. 石油学报, 2022, 43(6):871-884.

[21] TANG Huiying, LIANG Haipeng, ZHANG Liehui, et al. Hydraulic fracture extension patterns of conglomerate reservoirs and relevant influencing factors[J]. Acta Petrolei Sinica, 2022, 43(6):871-884.

[22] LIU B, YANG Y, LI J, et al. Stress sensitivity of tight reservoirs and its effect on oil saturation:a case study of Lower Cretaceous tight clastic reservoirs in the Hailar Basin,Northeast China[J]. Journal of Petroleum Science and Engineering, 2020,184:106484.

[23] DENG S, LI H, MA G, et al. Simulation of shale-proppant interaction in hydraulic fracturing by the discrete element method[J]. International Journal of Rock Mechanics and Mining Sciences, 2014,70:219-228.

[24] 李承龙, 王宏志, 赵欣, 等. 低渗透水驱油田面积井网见水时间计算新方法[J]. 石油化工高等学校学报, 2022, 35(3):63-69.

[25] LI Chenglong, WANG Hongzhi, ZHAO Xin, et al. Pridiction model of water breakthrough time of area well pattern in low permeability oilfield[J]. Journal of Petrochemical Universities, 2022, 35(3):63-69.

[26] 周忠亚. 纹层型页岩油储层裂缝扩展机理及工艺对策[J]. 特种油气藏, 2023, 30(6):141-149.

[27] ZHOU Zhongya. Mechanism of fracture extension and process countermeasures in grain-type shale oil reservoirs[J]. Special Oil & Gas Reservoirs, 2023, 30(6):141-149.

[28] 张敏, 彭岩, 张广清, 等. 基于孔边应力集中的页岩渗透率模型及应力敏感性评价[J]. 东北石油大学学报, 2023, 47(6):89-100.

[29] ZHANG Min, PENG Yan, ZHANG Guangqing, et al. Shale permeability model and stress sensitivity analysis base on stress concentration[J]. Journal of Northeast Petroleum University, 2023, 47(6):89-100.

[30] 闫国亮, 孙建孟, 刘学锋, 等. 储层岩石微观孔隙结构特征及其对渗透率影响[J]. 测井技术, 2014, 38(1):28-32.

[31] YAN Guoliang, SUN Jianmeng, LIU Xuefeng, et al. Characterization of microscopic pore structure of reservoir rock and its effect on permeability[J]. Well Logging Technology, 2014, 38(1):28-32.

[32] 李继强, 赵冠群, 戚志林, 等. 气藏型储气库多周期注采储集层应力敏感效应[J]. 石油勘探与开发, 2021, 48(4):835-842.

[33] LI Jiqiang, ZHAO Guanqun, QI Zhilin, et al. Stress sensitivity of formation during multi-cycle gas injection and production in an underground gas storage rebuilt from gas reservoirs[J]. Petroleum Exploration and Development, 2021, 48(4):835-842.

[34] 何元元, 谭葆, 梁骁, 等. 塔里木盆地大北气田储层原位应力敏感实验研究[C]//2023 油气田勘探与开发国际会议(2023IFEDC)论文集. 武汉: 中国地质大学(武汉),西安石油大学, 陕西省石油学会,2023:1-8.

[35] HE Yuanyuan, TAN Bei, LIANG Xiao, et al. Experimental study on in-situ stress sensitivity of the Dabei Gas Field reservoir in Tarim Basin[C]// 2023 Proceedings of the International Conference on Oil and Gas Field Exploration and Development(2023IFEDC). Wuhan: China University of Geosciences(Wuhan), Xi'an Shiyou University,Shaanxi Petroleum Society,2023:1-8.

[36] 李玉杰. 考虑应力敏感和多尺度流动的页岩气渗流模型[J]. 非常规油气, 2025, 12(1):117-122.

[37] LI Yujie. Shale gas flow model considering stress sensitivity and multi-scale flow[J]. Unconventional Oil & Gas, 2025, 12(1): 117-122.

[38] 蔡树行, 李洪建, 郭伦文, 等. 储层应力敏感性研究进展[J]. 重庆科技学院学报(自然科学版), 2010, 12(5):46-48.

[39] CAI Shuxing, LI Hongjian, GUO Lunwen, et al. Research advance of reservoir stress sensitivity[J]. Journal of Chongqing University of Science and Technology(Natural Science Edition), 2010, 12(5):46-48.

[40] 武小宁, 钟厚财, 林煜, 等. 中拐凸起走滑断裂发育特征及对成藏的控制作用[J]. 断块油气田, 2023, 30(2):286-293.

[41] WU Xiaoning, ZHONG Houcai, LIN Yu, et al. The development characteristics of strike-slip faults and its control effect on reservoir accumulation in Zhongguai Uplift[J]. Fault-block Oil & Gas Field, 2023, 30(2):286-293.

[42] 李道清, 兰浩, 郭巧珍, 等. 准噶尔盆地中拐凸起南部构造演化及油气地质意义:以中佳地区下二叠统佳木河组为例[J]. 东北石油大学学报, 2024, 48(5):48-61.

[43] LI Daoqing, LAN Hao, GUO Qiaozhen, et al. Structural evolution and geological significance of hydrocarbons in the south of Zhongguai Uplift,Junggar Basin:a case study of the Jiamuhe Formation of the Lower Permian in Zhongjia Area[J]. Journal of Northeast Petroleum University, 2024, 48(5):48-61.

[44] 薛丹, 张遂安, 吴新民, 等. 下寺湾油田长 7 油层组页岩气储层敏感性实验[J]. 岩性油气藏, 2019, 31(3):135-144.

[45] XUE Dan, ZHANG Suian, WU Xinmin, et al. Sensitivity experiment of shale gas reservoir of Chang 7 Reservoir in Xiasiwan Oilfield[J]. Lithologic Reservoirs, 2019, 31(3):135-144.

[46] WU J B, YANG S L, LI Q, et al. Micromechanism and mathematical model of stress sensitivity in tight reservoirs of binary granular medium[J]. Petroleum Science, 2024, 21(3):1780-1795.

[47] 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: 石油工业出版社,2010:18-21.

[48] National Energy Administration. Formation damage evaluation by flow test:SY/T 5358-2010[S]. Beijing: Petroleum Industry Press,2010:18-21.

[49] 孔垂显, 巴忠臣, 崔志松, 等. 火山岩油藏压裂水平井应力敏感产能模型[J]. 岩性油气藏, 2021, 33(4):166-175.

[50] KONG Chuixian, BA Zhongchen, CUI Zhisong, et al. Stress-sensitive productivity model of fractured horizontal wells in volcanic reservoirs[J]. Lithological Reservoirs, 2021, 33(4):166-175.

[51] DONALDSON E C, ALAM W, BEGUM N. Hydraulic fracturing explained:evaluation,implementation,and challenges[M]. Houston,TX: Gulf Publishing Company,2014:47-76.

[52] LIU A, LIU S, LIU P, et al. The role of sorption-induced coal matrix shrinkage on permeability and stress evolutions under replicated in situ condition for CBM reservoirs[J]. Fuel, 2021, 294(15):120530.

[53] 姜瑞忠, 沈泽阳, 崔永正, 等. 双重介质低渗油藏斜井压力动态特征分析[J]. 岩性油气藏, 2018, 30(6):131-137.

[54] JIANG Ruizhong, SHEN Zeyang, CUI Yongzheng, et al. Dynamical characteristics of inclined well in dual medium low permeability reservoir[J]. Lithological Reservoirs, 2018, 30(6):131-137.

[55] ZHONG X, ZHU Y, LIU L, et al. The characteristics and influencing factors of permeability stress sensitivity of tight sandstone reservoirs[J]. Journal of Petroleum Science and Engineering, 2020,191:107221.

[56] 成友友, 郭春秋, 陈鹏羽, 等. 碳酸盐岩气藏应力敏感特征及微观机理[J]. 石油勘探与开发, 2023, 50(1):152-159.

[57] CHENG Youyou, GUO Chunqiu, CHEN Pengyu, et al. Stress sensitivity of carbonate gas reservoirs and its microscopic mechanism[J]. Petroleum Exploration and Development, 2023, 50(1):152-159.

[58] MCKEE C, BUMB A C, KOENIG R A. Stress-dependent permeability and porosity of coal and other geologic formations[J]. SPE Formation Evaluation, 1988,3:81-91.

基金资助

中国石油天然气股份有限公司攻关性应用性科技专项(2023ZZ14)