含高矿化度储气层井试井分析

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-06-23 DOI:10.1115/1.4062824
Zhongxing Ren, Haifeng Wang, Duocai Wang, Hui He, H. Yuan, Ziheng Zhu, Jiaen Lin
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引用次数: 0

摘要

高含盐地下储气库在注采过程中,气井的生产能力受到盐沉积的严重影响,因此有必要通过试井技术预测气井的生产性能。然而,现有的试井分析方法无法可靠地解释注采过程中受盐沉积相变和高速非达西流影响的试井数据。因此,本文首先通过盐水和烃系统相平衡的闪蒸计算,确定了盐沉积与温度和压力之间的关系,建立了考虑盐沉积影响的孔隙度和渗透率模型,并结合Forchheimer渗流定律,进一步建立了考虑盐沉积影响的高速注采试井分析模型。最后,采用数值方法对模型进行求解,模拟计算了储层压力和盐沉积的动态变化。结果表明,地层水的盐度越高,储层中盐沉积的风险越大,盐沉积发生后储层的渗透率将显著降低;非达西流效应会加剧储层中的盐沉积风险。研究结果为盐气藏储层参数评价和生产动态预测提供了理论方法。
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Well test analysis for a well in gas storage reservoirs with the formation containing high salinity water
The production capacity of the gas wells is seriously affected by salt deposition during the injection and production process for underground gas storage with high salt content, so it is necessary to predict the production performance through well test technology. However, the existing well test analysis methods cannot be reliably used to interpret the well test data affected by salt deposition phase change and high-speed non-Darcy flow during the injection and production process. Therefore, this paper first determines the relationship between salt deposition and temperature and pressure through flash calculation of phase equilibrium of saltwater and hydrocarbon system, establishes a porosity and permeability model considering the effect of salt deposition, and further establishes a high-speed injection-production well test analysis model considering the effect of salt deposition in combination with Forchheimer's percolation law. Finally, the model is solved by numerical method, and the dynamic changes of reservoir pressure and salt deposition are simulated and calculated. The results show that the higher the salinity of formation water is, the greater the risk of salt deposition in the reservoir is, and the permeability of the reservoir will significantly decrease after salt deposition occurs; The non-Darcy flow effect will aggravate the risk of salt deposition in the reservoir. The research results provide a theoretical method for the evaluation of reservoir parameters and production performance prediction of salt gas storage reservoirs.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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