Water-Gas Ratio and Early Warning of Water Invasion in Unconsolidated Sandstone Gas Reservoirs in Sebei Gas Field，Qaidam Basin

doi:10.7657/XJPG20230107

Abstract

Abstract:

The Sebei gas field in the Qaidam basin is an anticline-type shallow unconsolidated sandstone gas field driven by weak edge water，and is exploited by depletion. According to water-gas ratio (WGR)，the production process in the gas field can be divided into four stages: low water-cut steady production stage，initial water invasion stage，edge water breakthrough stage，and strong water invasion stage. The occurrence of water invasion can be accurately monitored based on WGR. The edge water breakthrough stage can be used as a time window for predicting the large-scale water invasion of edge water，so as to adjust the development plan and extend the steady production period. The strong water invasion stage with high water cut corresponds to a long production period，so it is an important stage for enhanced oil recovery while producing with water.

Key words: Qaidam basin, Sebei gas field, biogenic gas reservoir, unconsolidated sandstone, edge water, elastic water drive, water-gas ratio, early warning of water invasion

CLC Number:

TE355.3

CHAI Xiaoying, WANG Yan, LIU Junfeng, CHEN Fenjun, YANG Huijie, TAN Zhiwei. Water-Gas Ratio and Early Warning of Water Invasion in Unconsolidated Sandstone Gas Reservoirs in Sebei Gas Field，Qaidam Basin[J]. Xinjiang Petroleum Geology, 2023, 44(1): 51-57.

Figures/Tables 6

Fig. 1.

Fig. 2.

Fig. 3.

Table 1.

Fig. 4.

Table 2.

References 20

[1]	孙虎法, 王小鲁, 成艳春, 等. 水源识别技术在涩北气田气井出水中的应用[J]. 天然气工业, 2009, 29(7):76-78.
	SUN Hufa, WANG Xiaolu, CHENG Yanchun, et al. The application of water source identification to control water breakthrough in gas wells of the Sebei gas field[J]. Natural Gas Industry, 2009, 29(7):76-78.
[2]	罗群, 王仕琛, 贾春, 等. 断控气藏的动态成藏物理模拟与启示:以柴达木盆地西北地区典型气藏为例[J]. 石油实验地质, 2022, 44(5):790-803.
	LUO Qun, WANG Shichen, JIA Chun, et al. Physical simulation of dynamic accumulation of fault-controlled gas reservoirs and its implications: a case study of typical gas reservoirs in northwestern part of Qaidam Basin[J]. Petroleum Geology & Experiment, 2022, 44(5):790-803.
[3]	华锐湘, 贾英兰, 李清, 等. 涩北气田气水分布及气水运动规律分析[J]. 天然气工业, 2009, 29(7):68-71.
	HUA Ruixiang, JIA Yinglan, LI Qing, et al. An analysis of gas-water distribution and its movement law in the Sebei gas field[J]. Natural Gas Industry, 2009, 29(7):68-71.
[4]	张伦友, 贺伟. 提高水驱气藏采收率新途径:早期治水法[J]. 天然气勘探与开发, 1998, 21(3):13-18.
	ZHANG Lunyou, HE Wei. A new way to improve the recovery of water drive gas reservoir:early water control method[J]. Natural Gas Exploration and Development, 1998, 21(3):13-18.
[5]	杨云, 顾端阳, 连运晓, 等. 多层疏松砂岩气藏水平井出水机理及防控对策:以柴达木盆地台南气田为例[J]. 天然气工业, 2019, 39(5):85-92.
	YANG Yun, GU Duanyang, LIAN Yunxiao, et al. Mechanism and prevention and control measures of horizontal well water discharge in multi-layer loose sandstone gas reservoir:a case study of Tainan gas field in Qaidam basin[J]. Natural Gas Industry, 2019, 39(5):85-92.
[6]	郭平, 徐永高, 陈召佑, 等. 对低渗气藏渗流机理实验研究的新认识[J]. 天然气工业, 2007, 27(7):86-88.
	GUO Ping, XU Yonggao, CHEN Zhaoyou, et al. New understanding of experimental study on percolation mechanism of low permeability gas reservoir[J]. Natural Gas Industry, 2007, 27(7):86-88.
[7]	郭平, 黄伟岗, 姜贻伟, 等. 致密气藏束缚与可动水研究[J]. 天然气工业, 2006, 26(10):99-101.
	GUO Ping, HUANG Weigang, JIANG Yiwei, et al. Study on binding and movable water in tight gas reservoir[J]. Natural Gas Industry, 2006, 26(10):99-101.
[8]	吴永平, 杨敏, 李明, 等. 克拉2气田水侵规律及模式[J]. 新疆石油地质, 2020, 41(3):302-306.
	WU Yongping, YANG Min, LI Ming, et al. Law and model of water intrusion in Kela 2 gas field[J]. Xinjiang Petroleum Geology, 2020, 41(3):302-306.
[9]	岳宝林, 祝晓林, 刘斌, 等. 气顶边水油藏天然能量开发界面运移规律研究[J]. 天然气与石油, 2021, 39(5):74-79.
	YUE Baolin, ZHU Xiaolin, LIU Bin, et al. Study on migration law of natural energy development interface in gas cap edge water reservoir[J]. Natural Gas and Oil, 2021, 39(5):74-79.
[10]	张烈辉, 梅青艳, 李允, 等. 提高边水气藏采收率的方法研究[J]. 天然气工业, 2006, 26(11):101-103.
	ZHANG Liehui, MEI Qingyan, LI Yun, et al. Study on methods to improve recovery of edge-water gas reservoirs[J]. Natural Gas Industry, 2006, 26(11):101-103.
[11]	吴长虹, 李敬功, 陈彬, 等. 高含水期产水率解释水淹层方法研究[J]. 石油地质与工程, 2004, 18(5):30-31.
	WU Changhong, LI Jinggong, CHEN Bin, et al. Study on the method of water yield in high water cut period to explain flooded layer[J]. Petroleum Geology and Engineering, 2004, 18(5):30-31.
[12]	顾端阳, 柴小颖, 孙勇, 等. 岩性-电性交会方法在疏松砂岩气藏水侵研究中的应用:以柴达木盆地台南气田为例[J]. 新疆石油地质, 2019, 40(5):624-629.
	GU Duanyang, CHAI Xiaoyin, SUN Yong, et al. Application of lithology-electrosexual method in the study of water invasion of loose sandstone gas reservoirs:a case study of Tainan gas field in Qaidam basin[J]. Xinjiang Petroleum Geology, 2019, 40(5):624-629.
[13]	赵秋丽. 草20馆陶一砂体水侵规律研究及潜力评价[J]. 断块油气田, 2006, 13(2):37-39.
	ZHAO Qiuli. Study on water invasion law and potential evaluation of pottery sand body in Cao20 pavilion[J]. Fault-Block Oil & Gas Field, 2006, 13(2):37-39.
[14]	陈朝晖, 邓勇. 疏松砂岩气藏水敏性对相对渗透率的影响[J]. 新疆石油地质, 2012, 33(6):708-711.
	CHEN Zhaohui, DENG Yong. Influence of water sensitivity on relative permeability of loose sandstone gas reservoir[J]. Xinjiang Petroleum Geology, 2012, 33(6):708-711.
[15]	薛江堂, 刘针, 薛龙龙, 等. 水驱开发油藏高含水期驱替程度和波及系数变化规律[J]. 新疆石油地质, 2018, 39(5):573-577.
	XUE Jiangtang, LIU Zhen, XUE Longlong, et al. Variation law of displacement degree and sweep coefficient in high water cut stage of water flooding reservoir[J]. Xinjiang Petroleum Geology, 2018, 39(5):573-577.
[16]	高文君, 宋成元, 付春苗, 等. 经典水驱油理论对应水驱特征曲线研究[J]. 新疆石油地质, 2014, 35(3):307-310.
	GAO Wenjun, SONG Chengyuan, FU Chunmiao, et al. Study on characteristic curve of water flooding corresponding to classical water flooding theory[J]. Xinjiang Petroleum Geology, 2014, 35(3):307-310.
[17]	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.
[18]	王泉, 陈超, 哈斯亚提·萨依提, 等. 基于压力监测的水平井临界出砂预警模型:以新疆H储气库为例[J]. 新疆石油地质, 2022, 43(2):214-220.
	WANG Quan, CHEN Chao, SAYITI Hasyati, et al. Early warning model for critical sand production in horizontal wells based on pressure monitoring:a case of H gas storage in Xinjiang[J]. Xinjiang Petroleum Geology, 2022, 43(2):214-220.
[19]	李枫凌, 徐士鹏, 刘涛, 等. WTK油田白垩系低阻油层成因及流体识别方法[J]. 新疆石油地质, 2022, 43(2):241-251.
	LI Fengling, XU Shipeng, LIU Tao, et al. Genesis and fluid identification method of Cretaceous low-resistivity oil layers in WTK oilfield[J]. Xinjiang Petroleum Geology, 2022, 43(2):241-251.
[20]	郑少婧, 郑得文, 孙军昌, 等. 气藏型储气库温度敏感性及其对气井注采能力的影响[J]. 石油实验地质, 2022, 44(2):365-372.
	ZHENG Shaojing, ZHENG Dewen, SUN Junchang, et al. Temperature-sensitivity of underground gas reservoir storage and its effect on well deliverability[J]. Petroleum Geology &Experiment, 2022, 44(2):365-372.