以天然岩心气水多周期互驱相渗测定实验为基础,揭示了储气库多周期注采相渗滞后效应,结合Carlson和Killough经典相渗滞后理论,建立了水侵气藏型储气库多周期注采相渗滞后数值模拟修正方法,并通过建立的中低渗透砂岩水侵气藏型储气库地质模型,系统研究了多周期注采相渗滞后效应对储气库流体宏观分布规律和生产运行指标的影响。研究表明：水侵气藏型储气库高速注采运行过程中存在相渗滞后效应,该效应的存在使储气库气水过渡区宽度、厚度增加,高效储气区不断收缩,含气孔隙体积峰值变化幅度减小,进而降低储气库的库容、工作气量及高效运行寿命等;数值模拟中若不考虑相渗滞后效应的影响,预测的储气库运行指标将存在较大误差,采用Killough和Carlson方法可对储气库相渗滞后效应进行修正,提高预测精度,其中Killough方法对实例模型的适应性更好。图20表3参25
By conducting relative permeability experiments of multi-cycle gas-water displacement and imbibition on natural cores, we discuss relative permeability hysteresis effect in underground gas storage during multi-cycle injection and production. A correction method for relative permeability hysteresis in numerical simulation of water-invaded gas storage has been worked out using the Carlson and Killough models. A geologic model of water-invaded sandstone gas storage with medium-low permeability is built to investigate the impacts of relative permeability hysteresis on fluid distribution and production performance during multi-cycle injection and production of the gas storage. The study shows that relative permeability hysteresis effect occurs during high-speed injection and production in gas storage converted from water-invaded gas reservoir, and leads to increase of gas-water transition zone width and thickness, shrinkage of the area of high-efficiency gas storage, and decrease of the peak value variation of pore volume containing gas, and then reduces the storage capacity, working gas volume, and high-efficiency operation span of the gas storage. Numerical simulations exhibit large prediction errors of performance indexes if this hysteresis effect is not considered. Killough and Carlson methods can be used to correct the relative permeability hysteresis effect in water-invaded underground gas storage to improve the prediction accuracy. The Killough method has better adaptability to the example model.
[1] 马新华, 郑得文, 申瑞臣, 等. 中国复杂地质条件气藏型储气库建库关键技术与实践[J]. 石油勘探与开发, 2018, 45(3): 489-499.
MA Xinhua, ZHENG Dewen, SHEN Ruichen, et al.Key technologies and practice for gas field storage facility construction of complex geological conditions in China[J]. Petroleum Exploration and Development, 2018, 45(3): 489-499.
[2] 丁国生, 魏欢. 中国地下储气库建设20年回顾与展望[J]. 油气储运, 2020, 39(1): 25-31.
DING Guosheng, WEI Huan.Review and prospect of 20 years of underground gas storage in China[J]. Oil & Gas Storage and Transportation, 2020, 39(1): 25-31.
[3] 郑得文, 胥洪成, 王皆明, 等. 气藏型储气库建库评价关键技术[J]. 石油勘探与开发, 2017, 44(5): 794-801.
ZHENG Dewen, XU Hongcheng, WANG Jieming, et al.Key evaluation techniques in the process of gas reservoir being converted into underground gas storage[J]. Petroleum Exploration and Development, 2017, 44(5): 794-801.
[4] 郑得文, 王皆明, 丁国生, 等. 气藏型储气库注采运行优化技术[M]. 北京: 石油工业出版社, 2018.
ZHENG Dewen, WANG Jieming, DING Guosheng, et al. Optimization technology for injection production operation of gas reservoir type gas storage[M]. Beijing: Petroleum Industry Press, 2018.
[5] TOOSEH E K, JAFARI A, TEYMOURI A.低渗透含水层储气库储气过程中气-水-岩相互作用及储气量影响因素[J]. 石油勘探与开发, 2018, 45(6): 1053-1058.
TOOSEH E K, JAFARI A, TEYMOURI A.Gas-water-rock interactions and factors affecting gas storage capacity during natural gas storage in a low permeability aquifer[J]. Petroleum Exploration and Development, 2018, 45(6): 1053-1058.
[6] DENNEY D.Relative permeability hysteresis: Water-alternating-gas injection and gas storage[J]. Journal of Petroleum Technology, 2013, 65(8): 90-92.
[7] RUBEN J.Relative permeabilities in reservoir simulation[D]. Mexico: Instituto de Ingenieria UNAM, 2003.
[8] 孙军昌, 胥洪成, 王皆明, 等. 气藏型地下储气库建库注采机理与评价关键技术[J]. 天然气工业, 2018, 38(4): 138-144.
SUN Junchang, XU Hongcheng, WANG Jieming, et al.Injection-production mechanisms and key evaluation technologies for underground gas storages rebuilt from gas reservoirs[J]. Natural Gas Industry, 2018, 38(4): 138-144.
[9] 唐立根, 王皆明, 白凤娟, 等. 基于修正后的物质平衡方程预测储气库库存量[J]. 石油勘探与开发, 2014, 41(4): 480-484.
TANG Ligen, WANG Jieming, BAI Fengjuan, et al.Inventory forecast in underground gas storage based on modified material balance equation[J]. Petroleum Exploration and Development, 2014, 41(4): 480-484.
[10] OSOBA J S, RICHARDSON J G, KERVER J K, et al.Laboratory measurements of relative permeability[J]. Journal of Petroleum Technology, 1951, 3(2): 47-56.
[11] LAND C S.Calculation of imbibition relative permeability for two- and three-phase flow from rock properties[J]. Trans. Am. Inst. Min. Metall, Petrowlium Engineering, 1968, 243(2): 149-156.
[12] KILLOUGH J E.Reservoir simulation with history dependent saturation functions[J]. Society of Petroleum Engineers Journal, 1976, 16(1): 37-48.
[13] KADET V V, GALECHYAN A M.Percolation modeling of relative permeability hysteresis[J]. Journal of Petroleum Science and Engineering, 2014, 119: 139-148.
[14] CARLSON F M.Simulation of relative permeability hysteresis to the nonwetting phase[R]. SPE 10157, 1981.
[15] RANAEE E, INZOLI F, RIVA M, et al.Hysteresis effects of three-phase relative permeabilities on black-oil reservoir simulation under WAG injection protocols[J]. Journal of Petroleum Science and Engineering, 2019, 176: 1161-1174.
[16] KOSSACK C A.Comparison of reservoir simulation hysteresis options[R]. SPE 63147, 2000.
[17] MAHZARI P, SOHRABI M.An improved approach for estimation of flow and hysteresis parameters applicable to WAG experiments[J]. Fuel, 2016, 197: 359-372.
[18] ISMAIL A M, JASSER M H, HAFEZ H H, et al.SCAL with full hysteresis significantly impact giant carbonate reservoir performance and improve the history match quality case study[R]. Abu Dhabi: International Petroleum Exhibition & Conference, 2015.
[19] JUANES R, SPITERI E J, ORR F M, et al. Impact of relative permeability hysteresis on geological CO2 storage[J]. Water Resources Research, 2006, 42(12): W12418-1-W12418-13.
[20] SPITERI E J, JUANES R.Impact of relative permeability hysteresis on the numerical simulation of WAG injection[J]. Journal of Petroleum Science & Engineering, 2006, 50(2): 115-139.
[21] SHI L, WANG J, LIAO G, et al.Mechanism of gas-water flow at pore-level in aquifer gas storage[J]. Journal of Central South University, 2013, 20(12): 3620-3626.
[22] FULCHER J R A, ERTEKIN T, STAHL C D. Effect of capillary number and its constituents on two-phase relative permeability curves[J]. Journal of petroleum technology, 1985, 37(2): 249-260.
[23] PATZEK T.Verification of a complete pore network simulator of drainage and imbibition[J]. SPE Journal, 2001, 6(2): 144-156.
[24] 杨胜来, 魏俊之. 油层物理学[M]. 北京: 石油工业出版社, 2004.
YANG Shenglai, WEI Junzhi. Reservoir physics[M]. Beijing: Petroleum Industry Press, 2004.
[25] 中国国家质检总局. 岩石中两相流体相对渗透率测定方法: GB/T 28912—2012[S]. 北京: 中国标准出版社, 2012.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. Test method for two phase relative permeability in rock: GB/T 28912—2012[S]. Beijing: China Standards Press, 2012.
