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采卤老腔改建储气库体积计算方法
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作者 周小松 王颖蛟 +2 位作者 闫磊 申律 常嘉伟 《中国石油和化工标准与质量》 2023年第8期86-88,共3页
随着中国能源结构的转型,地下储气库的建设迎来高峰期,利用盐矿开采后形成的采卤老腔改建储气库是目前缩短建库周期、降低建设成本的有效途径。采卤老腔需要经过筛选和评价后才能改建储气库,而腔体体积是老腔可利用性评价的关键指标,现... 随着中国能源结构的转型,地下储气库的建设迎来高峰期,利用盐矿开采后形成的采卤老腔改建储气库是目前缩短建库周期、降低建设成本的有效途径。采卤老腔需要经过筛选和评价后才能改建储气库,而腔体体积是老腔可利用性评价的关键指标,现有盐腔体积计算方法未考虑老腔闭井后腔体体积演变,只适用于溶腔阶段体积预估。为此,提出一种考虑腔体体积蠕变收缩的采卤老腔体积计算方法,基于质量平衡建立盐穴腔体体积计算数学模型,利用盐井资料和腔内卤水密度,考虑溶腔体积收缩推导出老腔总体积、可利用体积计算公式。将该方法应用于国内某采卤老腔改建项目进行验算,结果表明:该方法所需参数较少且容易获取,能够满足采卤老腔改建评估阶段腔体体积预测精确度要求。 展开更多
关键词 采卤老腔 储气库 质量平衡 体积演变 可利用体积
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Numerical modelling rock deformation subject to nitrogen cooling to study permeability evolution 被引量:10
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作者 Chunhui Zhang Laigui Wang +1 位作者 Jianhua Du Yinghui Tian 《International Journal of Coal Science & Technology》 EI 2015年第4期293-298,共6页
How to model the permeability evolution of rock subjected to liquid nitrogen cooling is a key issue. This paper proposes a simple but practical method to study the permeability evolution of rocks subject to liquid nit... How to model the permeability evolution of rock subjected to liquid nitrogen cooling is a key issue. This paper proposes a simple but practical method to study the permeability evolution of rocks subject to liquid nitrogen cooling. FLAC with FISH function was employed to numerically model the rock behavior under cooling. The enhanced perme- ability of the volumetric strain was defined, and the permeability was directly evaluated based on element's volumetric strain. Detailed procedures for implementing the evolution model of permeability in this paper were presented. A case study was carried out to simulate a coal bed where liquid nitrogen was injected in the bore hole. And a semi-submerged test of liquid nitrogen was performed. The method to model the permeability evolution of rocks subject to liquid nitrogen shock in this paper was proved to be right by the test results. This simulation results are discussed with the hope to provide some insight into understanding the nitrogen cooling practice. 展开更多
关键词 Liquid nitrogen cooling Tension failure Temperature Permeability evolution Enhanced permeability
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