Water Production Mechanism in Tight Sandstone Gas Reservoirs After Fracturing in Linxing Gas Field

doi:10.7657/XJPG20240111

Abstract

Abstract:

The tight sandstone gas reservoirs in the Linxing gas field，Ordos basin，are key targets for onshore gas development. Due to the structural complexity，reservoir physical properties，and complicated gas-water relationship，most gas wells produce water continuously after fracturing，and their water production rates are very different. Understanding the reasons for irreducible water saturation variation after fracturing is of great significance for formulating effective water control and gas recovery measures to increase well productivity. In this study，representative tight sandstone samples from the Linxing gas field were tested by using the gas displacement method to clarify how reservoir properties，production pressure difference，and fracturing fluid affect irreducible water saturation. The results show that the difference in the irreducible water saturation between matrix and fractures is 13.32%~18.36% for Class Ⅰ reservoirs，28.28%~34.19% for Class Ⅱ reservoirs，and 39.10%~48.15% for Class Ⅲ reservoirs. Hydraulic fractures can significantly improve the water flow capacity of reservoirs，and provide additional water flow pathways. The increased production pressure difference，reduced flow pressure loss and weakened hydrophilic degree are the main mechanisms leading to the weakening capacity of the reservoir in bounding water and water production of gas wells after fracturing. To control water and produce gas efficiently in tight sandstone gas reservoirs with high water cut after fracturing，measures such as controlling fracturing scale，optimizing production systems，and adjusting fracturing additive amount can be implemented，which will help delay the onset of water breakthrough in gas wells and reduce the overall water production.

Key words: Ordos basin, Linxing gas field, tight sandstone gas reservoir, hydraulic fracturing, irreducible water saturation, movable water

CLC Number:

TE357

SHI Xuefeng, YOU Lijun, GE Yan, HU Yunting, MA Litao, WANG Yijun, GUO Sasa. Water Production Mechanism in Tight Sandstone Gas Reservoirs After Fracturing in Linxing Gas Field[J]. Xinjiang Petroleum Geology, 2024, 45(1): 81-87.

Figures/Tables 8

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References 33

[1]	肖峰, 岳君, 李志超, 等. 苏里格气田致密砂岩气藏效益开发含水饱和度上限[J]. 新疆石油地质, 2022, 43(3):335-340.
	XIAO Feng, YUE Jun, LI Zhichao, et al. Upper limit of water saturation for profitable development of tight sandstone gas reservoirs in Sulige gas field[J]. Xinjiang Petroleum Geology, 2022, 43(3):335-340.
[2]	罗志立, 韩建辉, 罗超, 等. 四川盆地工业性油气层的发现、成藏特征及远景[J]. 新疆石油地质, 2013, 34(5):504-514.
	LUO Zhili, HAN Jianhui, LUO Chao, et al. The discovery,characteristics and prospects of commercial oil and gas layers/reservoirs in Sichuan basin[J]. Xinjiang Petroleum Geology, 2013, 34(5):504-514.
[3]	ZHANG Dujie, KANG Yili, SELVADURAI A P S, et al. The role of phase trapping on permeability reduction in an ultra-deep tight sandstone gas reservoir[J]. Journal of Petroleum Science and Engineering, 2019, 178:311-323. doi: 10.1016/j.petrol.2019.03.045
[4]	刘玲, 汤达祯, 王烽. 鄂尔多斯盆地临兴区块太原组致密砂岩黏土矿物特征及其对储层物性的影响[J]. 油气地质与采收率, 2019, 26(6):28-35.
	LIU Ling, TANG Dazhen, WANG Feng. Clay minerals characteristics of tight sandstone and its impact on reservoir physical properties in Taiyuan formation of Block Linxing in Ordos basin[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(6):28-35.
[5]	康毅力, 罗平亚. 中国致密砂岩气藏勘探开发关键工程技术现状与展望[J]. 石油勘探与开发, 2007, 34(2):239-245.
	KANG Yili, LUO Pingya. Current status and prospect of key techniques for exploration and production of tight sandstone gas reservoirs in China[J]. Petroleum Exploration and Development, 2007, 34(2):239-245.
[6]	李奇, 高树生, 叶礼友, 等. 致密砂岩气藏渗流机理及开发技术[J]. 科学技术与工程, 2014, 14(34):79-87.
	LI Qi, GAO Shusheng, YE Liyou, et al. The research of percolation mechanism and technical countermeasures of tight sandstone gas reservoirs[J]. Science Technology and Engineering, 2014, 14(34):79-87.
[7]	ZHANG Jie, LI Xizhe, SHEN Weijun, et al. Study of the effect of movable water saturation on gas production in tight sandstone gas reservoirs[J]. Energies, 2020, 13(18):1-14. doi: 10.3390/en13010001
[8]	SHI Hao, LAI Fengpeng, SHI Gongshuai, et al. Dynamic prediction and influencing factors analysis of gas and water co-production stage in tight sandstone reservoir[J]. Journal of Natural Gas Science and Engineering, 2021, 96:104327. doi: 10.1016/j.jngse.2021.104327
[9]	李锦, 王新海, 朱黎鹞, 等. 气藏产水来源综合判别方法研究[J]. 天然气地球科学, 2012, 23(6):1185-1190.
	LI Jin, WANG Xinhai, ZHU Liyao, et al. A study of comprehensive discriminant methods of the source of water-yielding in gas reservoirs[J]. Natural Gas Geoscience, 2012, 23(6):1185-1190.
[10]	窦伟坦, 刘新社, 王涛. 鄂尔多斯盆地苏里格气田地层水成因及气水分布规律[J]. 石油学报, 2010, 31(5):767-773. doi: 10.7623/syxb201005011
	DOU Weitan, LIU Xinshe, WANG Tao. The origin of formation water and the regularity of gas and water distribution for the Sulige gas field,Ordos basin[J]. Acta Petrolei Sinica, 2010, 31(5):767-773. doi: 10.7623/syxb201005011
[11]	兰朝利, 张君峰, 何顺利, 等. 低渗低阻产水气藏气水层识别:以广安气田须家河组为例[J]. 地球科学:中国地质大学学报, 2010, 35(6):1053-1059.
	LAN Chaoli, ZHANG Junfeng, HE Shunli, et al. Gas and water pay recognition of water-producing reservoir with low permeability and resistivity:A case from the Xujiahe formation in Guang’an gasfield of Sichuan basin,southwestern China[J]. Earth Science:Journal of China University of Geosciences, 2010, 35(6):1053-1059. doi: 10.3799/dqkx.2010.119
[12]	张兵, 周龙刚, 王应斌, 等. 鄂尔多斯盆地东缘临兴地区致密储层产出水赋存特征及开发启示[J]. 非常规油气, 2022, 9(1):90-97.
	ZHANG Bing, ZHOU Longgang, WANG Yingbin, et al. Occurrence characteristics and development enlightenment of produced water in tight reservoir in Linxing area,eastern margin of the Ordos basin[J]. Unconventional Oil & Gas, 2022, 9(1):90-97.
[13]	ZHANG Dingye, PANG Xiongqi, JIANG Fujie, et al. Characteristics and controlling factors of tight sandstone gas reservoirs in the Upper Paleozoic strata of Linxing area in the Ordos basin,China[J]. Journal of Natural Gas Science and Engineering, 2020, 75:103135. doi: 10.1016/j.jngse.2019.103135
[14]	丁万贵, 刘世界, 董建宏, 等. 鄂尔多斯盆地临兴致密气田低效井措施优选方法[J]. 天然气勘探与开发, 2020, 43(2):88-94.
	DING Wangui, LIU Shijie, DONG Jianhong, et al. A method to optimally select measures for low-efficiency wells,Linxing tight gas field,Ordos basin[J]. Natural Gas Exploration and Development, 2020, 43(2):88-94.
[15]	方明. 地层压裂后出水的判断方法及原因分析[J]. 油气井测试, 2015, 24(5):36-38.
	FANG Ming. Judging method of water production at postfrac and reason analysis[J]. Well Testing, 2015, 24(5):36-38.
[16]	叶礼友, 高树生, 杨洪志, 等. 致密砂岩气藏产水机理及开发对策[J]. 天然气工业, 2015, 35(2):41-46.
	YE Liyou, GAO Shusheng, YANG Hongzhi, et al. Water production mechanism and development strategy of tight sandstone gas reservoirs[J]. Natural Gas Industry, 2015, 35(2):41-46.
[17]	吴蒙, 秦勇, 申建, 等. 致密砂岩储层束缚水饱和度影响因素:以鄂尔多斯盆地临兴地区为例[J]. 吉林大学学报(地球科学版), 2022, 52(1):68-79.
	WU Meng, QIN Yong, SHEN Jian, et al. Influencing factors of irreducible water saturation in tight sandstone reservoirs:A case study of Linxing area in Ordos basin[J]. Journal of Jilin University(Earth Science Edition), 2022, 52(1):68-79.
[18]	苏玉亮, 李东升, 李蕾, 等. 致密砂岩气藏地层水可动性及其影响因素研究[J]. 特种油气藏, 2020, 27(4):118-122. doi: 10.3969/j.issn.1006-6535.2020.04.018
	SU Yuliang, LI Dongsheng, LI Lei, et al. Formation water mobility and influencing factors in tight sandstone gas reservoir[J]. Special Oil & Gas Reservoirs, 2020, 27(4):118-122.
[19]	钟韬, 夏瑜, 刘创新, 等. 东海西湖凹陷致密砂岩气藏高含水特征及产水机理探讨[J]. 天然气勘探与开发, 2018, 41(3):75-80.
	ZHONG Tao, XIA Yu, LIU Chuangxin, et al. High watercut characteristics and water-producing mechanisms in tight sandstone gas reservoirs,Xihu sag,East China sea[J]. Natural Gas Exploration and Development, 2018, 41(3):75-80.
[20]	刘再振, 李洋冰, 胡维强, 等. 临兴低阻气藏高不动水饱和度成因及其对气层电阻率的影响[J]. 新疆石油地质, 2023, 44(2):217-223.
	LIU Zaizhen, LI Yangbing, HU Weiqiang, et al. High immobile water saturation in Linxing gas reservoir:Genesis and impacts on gas layer resistivity[J]. Xinjiang Petroleum Geology, 2023, 44(2):217-223.
[21]	YIN Xiangdong, SHU Jiang, LI Yanlu, et al. Impact of pore structure and clay content on the water-gas relative permeability curve within tight sandstones:A case study from the LS block,eastern Ordos basin,China[J]. Journal of Natural Gas Science and Engineering, 2020, 81:103418. doi: 10.1016/j.jngse.2020.103418
[22]	刘喜杰, 马遵敬, 韩东, 等. 鄂尔多斯盆地东缘临兴区块致密砂岩优质储层形成的主控因素[J]. 天然气地球科学, 2018, 29(4):481-490.
	LIU Xijie, MA Zunjing, HAN Dong, et al. Research on the main factors of high quality tight sandstone reservoir in Linxing block,Ordos basin[J]. Natural Gas Geoscience, 2018, 29(4):481-490.
[23]	杜佳, 朱光辉, 李勇, 等. 鄂尔多斯盆缘致密砂岩气藏勘探开发挑战与技术对策:以临兴—神府气田为例[J]. 天然气工业, 2022, 42(1):114-124.
	DU Jia, ZHU Guanghui, LI Yong, et al. Exploration and development challenges and technological countermeasures for tight sandstone gas reservoirs in Ordos basin margin:A case study of Linxing-Shenfu gas field[J]. Natural Gas Industry, 2022, 42(1):114-124.
[24]	LI Guozhang, QIN Yong, SHEN Jian, et al. Geochemical characteristics of tight sandstone gas and hydrocarbon charging history of Linxing area in Ordos basin,China[J]. Journal of Petroleum Science and Engineering, 2019, 177:198-207. doi: 10.1016/j.petrol.2019.02.023
[25]	孔星星, 肖佃师, 蒋恕, 等. 联合高压压汞和核磁共振分类评价致密砂岩储层:以鄂尔多斯盆地临兴区块为例[J]. 天然气工业, 2020, 40(3):38-46.
	KONG Xingxing, XIAO Dianshi, JIANG Shu, et al. Application of the combination of high-pressure mercury injection and nuclear magnetic resonance to the classification and evaluation of tight sandstone reservoirs:A case study of the Linxing block in the Ordos basin[J]. Natural Gas Industry, 2020, 40(3):38-46.
[26]	JU Wei, SHEN Jian, QIN Yong, et al. In-situ stress state in the Linxing region,eastern Ordos basin,China:Implications for unconventional gas exploration and production[J]. Marine and Petroleum Geology, 2017, 86:66-78. doi: 10.1016/j.marpetgeo.2017.05.026
[27]	张冲, 张超谟, 张占松, 等. 致密气储层岩心束缚水饱和度实验对比[J]. 天然气地球科学, 2016, 27(2):352-358.
	ZHANG Chong, ZHANG Chaomo, ZHANG Zhansong, et al. Comparative experimental study of the core irreducible water saturation of tight gas reservoir[J]. Natural Gas Geoscience, 2016, 27(2):352-358.
[28]	QIAO Juncheng, ZENG Jianhui, XIA Yuxuan, et al. A three dimensional visualized physical simulation for natural gas charging in the micro-nano pore system[J]. Petroleum Exploration and Development, 2022, 49(2):349-362. doi: 10.1016/S1876-3804(22)60029-6
[29]	TIAN Jian, KANG Yili, LUO Pingya, et al. A new method for water phase trapping damage evaluation in tight oil reservoirs[J]. Journal of Petroleum Science and Engineering, 2019, 172:32-39. doi: 10.1016/j.petrol.2018.09.038
[30]	李相方, 冯东, 张涛, 等. 毛细管力在非常规油气藏开发中的作用及应用[J]. 石油学报, 2020, 41(12):1719-1733. doi: 10.7623/syxb202012024
	LI Xiangfang, FENG Dong, ZHANG Tao, et al. The role and its application of capillary force in the development of unconventional oil and gas reservoirs and its application[J]. Acta Petrolei Sinica, 2020, 41(12):1719-1733. doi: 10.7623/syxb202012024
[31]	WANG Yijun, KANG Yili, YOU Lijun, et al. Multiscale formation damage mechanisms and control technology for deep tight clastic gas reservoirs[J]. SPE Journal, 2021, 26(6):3877-3892. doi: 10.2118/205492-PA
[32]	LI Yang, WANG Shibin, GUO Jianchun, et al. Reducing adsorption of hydroxypropyl guar gum on sandstone by silicon nanoparticles[J]. Carbohydrate Polymers, 2019, 219:21-28. doi: S0144-8617(19)30521-1 pmid: 31151518
[33]	胡勇, 李熙喆, 卢祥国, 等. 高含水致密砂岩气藏储层与水作用机理[J]. 天然气地球科学, 2014, 25(7):1072-1076.
	HU Yong, LI Xizhe, LU Xiangguo, et al. The realization of the active mechanism between formation and water in tight sand gas reservoir with high water saturation[J]. Natural Gas Geoscience, 2014, 25(7):1072-1076.