At present, gas-water relative permeability curves of gas reservoirs with high temperature and high pressure are mostly obtained by unsteady testing method. The testing device is mainly equipped with back pressure valve to control fluid pressure. However, the pressure is easy to change under high temperature and high pressure, resulting in deviation in gas-water measurement. For this reason, this paper proposed a testing device and method for unsteady gas-water relative permeability under high temperature and high pressure based on the capacitance method. The testing device was fixed a self-developed capacitance liquid meter. The experimental temperature and pressure were increased to 200.0 ℃ and 80.00 MPa, respectively. The water production rate was measured by the change of liquid volume and capacitance. An electric turbo-metering pump was used to control the fluid control and measure the gas volume. The influence of fluid pressure and oil reservoir temperature on the gas-water relative permeability curve was analyzed on the basis of experimental test data. The results showed that under the same conditions, when the experimental temperature was increased, the irreducible water saturation was lower and the gas-water co-permeation area was wider; when the experimental fluid pressure was decreased, the irreducible water saturation was higher and the relative permeability of the gas phase was lower. The study results are of great significance for guidance in the development scheme design, dynamic analysis and understanding of gas-water seepage rules of gas reservoirs with high temperature and high pressure.
Zhang Guangdong
,
Wu Zheng
,
Li Yichi
,
Chen Yijian
,
Yang Qingsong
,
Pan Yi
. Testing Device and Method for Unsteady Gas-water Relative Permeability under High Temperature and High Pressure[J]. Special Oil & Gas Reservoirs, 2021
, 28(2)
: 78
-82
.
DOI: 10.3969/j.issn.1006-6535.2021.02.011
[1] EDMONDSON TA.Effect of temperature on waterflooding[J].Journal of Canadian Petroleum Technology,1965,4(4):236-242.
[2] MILLER MA, RAMEY HJ.Effect of temperature on oil water relative permeabilities of unconsolidated and consolidated sands[J].Society of Petroleum Engineers Journal,1985,25(6):945-953.
[3] GAWISH A,Al-HOMADHI E.Relative permeability curves for high pressure, high temperature reservoir conditions[J].Oil and Gas Business,2008,1(1): 1-3.
[4] 易敏,郭平,孙良田.非稳态法水驱气相对渗透率曲线实验[J].天然气工业,2007, 27(10):92-94,141-142.
YI Min,GUO Ping,SUN Liangtian.An experimental study on relative permeability curve for unsteady-state gas displacement by water[J].Natural Gas Industry,2007,27(10):92-94,141-142.
[5] 钟晓,杜建芬.气水相渗特征与高温高压实验研究[J].重庆科技学院学报(自然科学版),2013,15(3):70-73.
ZHONG Xiao,DU Jianfen.Gas-water permeability characteristics and high temperature and high pressure experimental study[J].Journal of Chongqing University of Science and Technology(Natural Science Edition)2013,15(3):70-73.
[6] 方建龙,郭平,肖香姣,等.高温高压致密砂岩储集层气水相渗曲线测试方法[J].石油勘探与开发,2015,42(1):84-87.
FANG Jianlong,GUO Ping,XIAO Xiangjiao,et al.Gas-water relative permeability measurement of high temperature and high pressure tight gas reservoirs[J].Petroleum Exploration and Development,2015,42(1):84-87.
[7] 汪周华,肖阳,郭平,等.缝洞型碳酸盐岩气藏高温高压气水两相渗流特征[J].油气藏评价与开发,2017,7(2):47-52.
WANG Zhouhua,XIAO Yang,GUO Ping,et al.Gas-water flowing characteristics under high temperature and high pressure in fractured-cavity carbonate gas reservoir[J].Reservoir Evaluation and Development,2017,7(2):47-52.
[8] 庄海军,刘兴斌. 温度、矿化度对高频电容法测持水率的影响[J].测井技术,1996,20(1):21-26,31.
ZHUANG Haijun,LIU Xingbin.Effects of temperature and salinity on water hold-up measurement by high frequency capacitance method[J].Well Logging Technology,1996,20(1):21-26,31.
[9] 刘丹,潘保芝,陈刚,等.致密砂岩气水相渗曲线的统一描述方法[J].地球物理学进展,2015,30(1):300-303.
LIU Dan,PAN Baozhi,CHEN Gang,et al.Unified description on compact sandstone gas-water relative permeability curve[J].Progress in Geophysics,2015,30(1):300-303.
[10] 杨志兴,许馨月,陈自立,等.不同压力梯度下气水相渗曲线的实验和产能研究[J].科技与创新,2019,15(23):39-40.
YANG Zhixing,XU Xinyue,CHEN Zili,et al.Experiment and productivity study on gas-water permeability curves under different pressure gradients[J].Science and Technology & Innovation,2019,15(23):39-40.
[11] 郭肖,杜志敏,姜贻伟,等.温度和压力对气水相对渗透率的影响[J].天然气工业,2014,34(6):60-64.
GUO Xiao,DU Zhimin,JIANG Yiwei,et al.Can gas-water relative permeability measured under experiment conditions be reliable for the development guidance of a real HPHT reservoir[J].Natural Gas Industry,2014,34(6):60-64.
[12] 国家能源局.岩石中两相流体相对渗透率测定方法:GB/T 28912—2012[S].北京:石油工业出版社,2012:8-12.
National Energy Administration.Test method two phase relative permeability rock(GB/T 28912—2012)[S].Beijing:Petroleum Industry Press,2012:8-12.
