Water Production Patterns of Fault-Fracture Gas Reservoir in Xu-2 Member in Western Sichuan Depression

doi:10.7657/XJPG20250506

Abstract

Abstract:

In the western Sichuan depression of Sichuan Basin, the gas reservoir in the second member of Xujiahe formation (Xu-2 member) is a typical fault-fracture tight sandstone gas reservoir. Natural fractures are well developed in the reservoir, with a strong connectivity. The gas wells initially produce at high rates, but cannot maintain stable yield due to water invasion. To identify the causes of water production and determine the water invasion pathway, scale, and timing, gas wells were classified depending on their dynamic characteristics such as production rate and pressure. By analyzing the distribution of gas and water and the fracture characteristics of the reservoir, water invasion patterns were identified, and a numerical simulation model which can reflect these patterns was established. Based on the results of the numerical simulation, criteria for determining water invasion patterns were established, and the simulation results were verified using water analysis data from gas wells.

Key words: Sichuan Basin, Western Sichuan depression, Upper Triassic, Xujiahe formation, tight sandstone, gas reservoir, water invasion pattern, numerical simulation

CLC Number:

TE112.23

XU Zhongyi, GUO Yandong, BI Youyi, ZHAO Xiangyuan, SHI Haitao, LIU Lu, MI Lidong. Water Production Patterns of Fault-Fracture Gas Reservoir in Xu-2 Member in Western Sichuan Depression[J]. Xinjiang Petroleum Geology, 2025, 46(5): 567-574.

Figures/Tables 12

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Table 1.

Fig. 6.

Fig. 7.

Fig. 8.

Fig. 9.

Fig. 10.

Fig. 11.

References 20

[1]	李莎, 陈冬霞, 王翘楚, 等. 川西坳陷新场—新盛地区须二段致密砂岩气水富集特征及成因机制[J]. 天然气地球科学, 2024, 35(11):2012-2028. doi: 10.11764/j.issn.1672-1926.2024.04.011
	LI Sha, CHEN Dongxia, WANG Qiaochu, et al. Gas-water enrichment characteristics and genetic mechanism of the second member of Xujiahe formation tight sandstone in Xinchang-Xinsheng area of Western Sichuan depression[J]. Natural Gas Geoscience, 2024, 35(11):2012-2028. doi: 10.11764/j.issn.1672-1926.2024.04.011
[2]	赵俊威, 陈恭洋, 赵星, 等. 川西新场地区须二段致密砂岩气藏气水分布特征及主控因素[J]. 断块油气田, 2024, 31(3):379-386.
	ZHAO Junwei, CHEN Gongyang, ZHAO Xing, et al. Gas-water distribution characteristics and main controlling factors of tight sandstone gas reservoir in the second member of Xujiahe formation in Xinchang area,western Sichuan[J]. Fault-Block Oil & Gas Field, 2024, 31(3):379-386.
[3]	吴见萌, 康建云, 缪祥禧, 等. 川西新场地区须二气藏气水分布规律[J]. 天然气地球科学, 2024, 35(7):1277-1288. doi: 10.11764/j.issn.1672-1926.2023.12.010
	WU Jianmeng, KANG Jianyun, MIAO Xiangxi, et al. Complex gas water distribution law of the gas reservoir of the second member of Xujiahe formation in Xinchang area,western Sichuan[J]. Natural Gas Geoscience, 2024, 35(7):1277-1288. doi: 10.11764/j.issn.1672-1926.2023.12.010
[4]	山俊杰, 毕有益, 邓美洲, 等. 川西坳陷新场气田须二气藏地层水成因研究:水化学和锶同位素证据[J]. 岩石矿物学杂志, 2023, 42(5):735-744.
	SHAN Junjie, BI Youyi, DENG Meizhou, et al. Hydrochemistry and Sr isotope constraints on the genesis of formation water in the 2nd member of Xujiahe formation gas reservoir in Xinchang gas field,western Sichuan depression[J]. Acta Petrologica et Mineralogica, 2023, 42(5):735-744.
[5]	吴双, 段太忠, 商晓飞, 等. 川西坳陷XC区块须二段气藏生产模式分类及其对气藏类型的启示[J]. 东北石油大学学报, 2020, 44(3):84-96.
	WU Shuang, DUAN Taizhong, SHANG Xiaofei, et al. Production mode classification and their insight into the gas reservoir type of Xu 2 member gas reservoir in XC block,western Sichuan depression[J]. Journal of Northeast Petroleum University, 2020, 44(3):84-96.
[6]	倪阿园. 新场须二气藏出水特征及排水采气工艺研究[D]. 成都: 成都理工大学, 2013.
	NI Ayuan. The gas pool features and gas drainage technologies of the 2nd segment of Xujiahe formation of Xin Chang[D]. Chengdu: Chengdu University of Technology, 2013.
[7]	王旭. 川西须二气藏产水气井动态特征及开采对策[J]. 中外能源, 2018, 23(5):49-56.
	WANG Xu. Dynamic characteristics and development strategies of water-producing gas wells in T₃x₂ gas reservoirs of western Sichuan Basin[J]. Sino-Global Energy, 2018, 23(5):49-56.
[8]	陈冬霞, 庞雄奇, 李林涛, 等. 川西坳陷中段上三叠统须二段气水分布特征及成因机理[J]. 现代地质, 2010, 24(6):1117-1125.
	CHEN Dongxia, PANG Xiongqi, LI Lintao, et al. Gas-water distribution characteristics and genetic mechanism of the second sector of the Upper Triassic Xujiahe formation in the middle of the western Sichuan depression[J]. Geoscience, 2010, 24(6):1117-1125.
[9]	庞河清, 匡建超, 罗桂滨, 等. 川西新场气田须二气藏水体动态分布与水化学特征[J]. 天然气地球科学, 2012, 23(1):190-197. doi: 10.11764/j.issn.1672-1926.2012.01.190
	PANG Heqing, KUANG Jianchao, LUO Guibin, et al. Water dynamic distribution and chemical character in the Xu2 member gas reservoir of Xinchang gas field,western Sichuan Basin[J]. Natural Gas Geoscience, 2012, 23(1):190-197.
[10]	郝国丽, 柳广弟, 谢增业, 等. 川中地区须家河组致密砂岩气藏气水分布模式及影响因素分析[J]. 天然气地球科学, 2010, 21(3):427-434. doi: 10.11764/j.issn.1672-1926.2010.03.427
	HAO Guoli, LIU Guangdi, XIE Zengye, et al. Gas-water distributed pattern in Xujiahe formation tight gas sandstone reservoir and influential factor in central Sichuan Basin[J]. Natural Gas Geoscience, 2010, 21(3):427-434. doi: 10.11764/j.issn.1672-1926.2010.03.427
[11]	黎华继, 张晟, 安风山, 等. 新场气田须二气藏气水分布探讨[J]. 天然气技术, 2008, 2(2):28-31.
	LI Huaji, ZHANG Sheng, AN Fengshan, et al. Gas and water distribution in Xuer reservoir,Xinchang gasfield[J]. Natural Gas Technology, 2008, 2(2):28-31.
[12]	沈忠民, 刘四兵, 吕正祥, 等. 川西坳陷中段陆相地层水纵向变化特征及水—岩相互作用初探[J]. 沉积学报, 2011, 29(3):495-501.
	SHEN Zhongmin, LIU Sibing, LV Zhengxiang, et al. Vertical geochemical characteristics of continental formation water and its water-rock interaction in the middle area of western Sichuan depression[J]. Acta Sedimentologica Sinica, 2011, 29(3):495-501.
[13]	何晓东, 邹绍林, 卢晓敏. 边水气藏水侵特征识别及机理初探[J]. 天然气工业, 2006, 26(3):87-89.
	HE Xiaodong, ZOU Shaolin, LU Xiaomin. A preliminary discussion on mechanism and recongnition of water invasion characteristics in edge water drive gas reservoirs[J]. Natural Gas Industry, 2006, 26(3):87-89.
[14]	糜利栋, 曾大乾, 刘华, 等. 天然气地下储气库智能化建设关键技术及其发展趋势[J]. 石油与天然气地质, 2024, 45(2):581-592.
	MI Lidong, ZENG Daqian, LIU Hua, et al. Key technologies and development trends for intelligent construction of underground gas storage facilities[J]. Oil & Gas Geology, 2024, 45(2):581-592.
[15]	糜利栋, 曾大乾, 李遵照, 等. 中国石化地下储气库智能化建设进展及展望[J]. 世界石油工业, 2023, 30(6):88-95.
	MI Lidong, ZENG Daqian, LI Zunzhao, et al. Progress and prospect of intelligent of Sinopec underground gas storage[J]. World Petroleum Industry, 2023, 30(6):88-95.
[16]	谢鹏, 陈鹏羽, 赵海龙, 等. 碳酸盐岩裂缝-孔隙型储集层水侵特征及残余气分布规律[J]. 新疆石油地质, 2023, 44(5):583-591.
	XIE Peng, CHEN Pengyu, ZHAO Hailong, et al. Water invasion characteristics and residual gas distribution in fractured-porous carbonate reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(5):583-591.
[17]	陈鹏羽, 程木伟, 陈怀龙, 等. 底水丘滩体储集层特征及开发对策[J]. 新疆石油地质, 2021, 42(1):94-99.
	CHEN Pengyu, CHENG Muwei, CHEN Huailong, et al. Characteristics and development strategies of mound-shoal reservoirs with bottom water[J]. Xinjiang Petroleum Geology, 2021, 42(1):94-99.
[18]	李熙喆, 郭振华, 胡勇, 等. 中国超深层构造型大气田高效开发策略[J]. 石油勘探与开发, 2018, 45(1):111-118. doi: 10.11698/PED.2018.01.11
	LI Xizhe, GUO Zhenhua, HU Yong, et al. Efficient development strategies for large ultra-deep structural gas fields in China[J]. Petroleum Exploration and Development, 2018, 45(1):111-118. doi: 10.11698/PED.2018.01.11
[19]	方飞飞, 李熙喆, 高树生, 等. 边、底水气藏水侵规律可视化实验研究[J]. 天然气地球科学, 2016, 27(12):2246-2252. doi: 10.11764/j.issn.1672-1926.2016.12.2246
	FANG Feifei, LI Xizhe, GAO Shusheng, et al. Visual simulation experimental study on water invasion rules of gas reservoir with edge and bottom water[J]. Natural Gas Geoscience, 2016, 27(12):2246-2252. doi: 10.11764/j.issn.1672-1926.2016.12.2246
[20]	熊钰, 杨水清, 乐宏, 等. 裂缝型底水气藏水侵动态分析方法[J]. 天然气工业, 2010, 30(1):61-64.
	XIONG Yu, YANG Shuiqing, LE Hong, et al. A new method of water influx performance analysis on fracture gas reservoirs with bottom water[J]. Natural Gas Industry, 2010, 30(1):61-64.

模型	裂缝密度/（条·m^-1）	裂缝开度/m	裂缝孔隙度	x方向渗透率/mD	y方向渗透率/mD	z方向渗透率/mD
低角度缝模型	2	7.5×10^-5	1.21×10^-6	0.559	0.558	0.019
网状缝模型	2	7.5×10^-5	1.21×10^-6	0.559	0.274	0.303
高角度缝模型	2	7.5×10^-5	1.21×10^-6	0.561	0.018	0.558