基于高速非达西渗流规律的含水层压缩空气储能囊腔建库参数优选  

Parameter optimization of building compressed air energy storage cavities in aquifers based on high-speed non Darcy flow pattern

作　　者：李健 杨志伟[1] 王宇鹏 张鲁钢 许雨桐 王艺 LI Jian;YANG Zhiwei;WANG Yupeng;ZHANG Lugang;XU Yutong;WANG Yi(Exploration and Development Research Institute of Shengli Oilfield,Sinopec,Dongying,Shandong 257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东省东营市257015

出　　处：《天然气工业》2025年第2期180-188,共9页Natural Gas Industry

基　　金：中国石油化工股份有限公司科技项目“油气田压缩空气储能库优化设计技术研究”(编号:P23036)。

摘　　要：在新能源快速发展的大背景下,储能技术需求也日益突显,其中含水层压缩空气储能库(CAESA)是实现储能的重要技术途径之一。但压缩空气储能库在高频、高速气体注采过程中存在明显的非线性渗流规律,为提高CAESA囊腔质量,亟需在认识非线性流动规律的基础上,进行囊腔的设计与优化。为此,搭建高速空气驱水平台,采用不同渗透率岩心开展高速注采测试,通过流动规律分析,得到含水层压缩空气储能过程非达西渗流规律,进而基于拟合的含水层数模模型,对注采空气建立囊腔过程进行了数值模拟,得出最优的造腔建库参数。研究结果表明:①CAESA高速注采下容易出现非达西渗流现象,随渗透率增加,非达西现象减弱,推荐CAESA囊腔构造选址区域储层渗透率应高于500 mD;②提出了囊腔质量评价及建腔参数优选的2个关键参数——囊腔平均含气饱和度和囊腔延展度;③周期注采气造腔过程中,总注气量需要超过0.2×10^(8) m^(3),应采用提前排水、降速排水模式,并以较高压力水平和累计产水量最少为标准,优选最优CAESA日循环注气方案。结论认为:①应在认识非线性流动规律的基础上,再开展CAESA囊腔设计与优化;②周期注采气造腔方式效果较好,随注气速度增大,造腔后囊腔质量下降。In the context of rapid development of new energies,the demands for energy storage technologies get increasingly significant.Compressed air energy storage in aquifers(CAESA)is one of the important technical means for energy storage,but it displays an obvious non-linear flow pattern in the process of high-frequency and high-speed air injection and production.In order to improve the quality of CAESA cavity,it is necessary to carry out cavity design and optimization on the basis of understanding non-linear flow patterns.In this paper,a high-speed air displacing water experiment platform is constructed and cores with different permeabilities were used for high-rate injection-production test.The non-Darcy flow pattern in the process of CAESA in aquifers is analyzed by conducting flow pattern test.Based on the fitted aquifer numerical model,the cavity building process through air injection and production is numerically simulated,and the optimal cavity building parameters are determined.The following results are obtained.First,under high-speed injection and production situations of CAESA,non-Darcy flow phenomena are common.With an increase of permeability,the non-Darcy phenomena get weak.Therefore,the candidate sites of CAESA cavity shall have a reservoir permeability higher than 500 mD.Second,two key parameters for cavity quality evaluation and cavity building parameter optimization are proposed,i.e.,average gas saturation and extensibility of cavity.Third,in the process of cavity building by cyclic air injection and production,the total air injection volume shall exceed 0.2×108 m3,the advanced drainage and reduced velocity drainage mode shall be adopted,and the optimal CAESA daily cyclic air injection scheme shall be selected with high pressure and minimum cumulative water production as the standard.In conclusion,the design and optimization of CAESA cavity shall be carried out on the basis of understanding non-linear flow patterns.What's more,the cyclic air injection and production for cavity building works well.With

关 键 词：高速非达西流动 渗透率 囊腔模拟 建腔参数 物模实验 数值模拟 囊腔延展度 

分 类 号：TE822[石油与天然气工程—油气储运工程]