石油勘探与开发2017，Vol.44Issue(1)：137-143,7.DOI:10.11698/PED.2017.01.17
厚夹层盐穴储气库扩大储气空间造腔技术
Solution mining technology of enlarging space for thick-sandwich salt cavern storage
摘要
Abstract
Aiming at the current problem that thick sandwiches are commonly developed in domestic salt mines,this study investigated whether thick sandwiches would collapse to allow connection of salt deposits above and below,consequently increase leaching height and expand single cavern capacity by laboratory experiments,numerical simulation and field tests.The analysis of water-soluble mechanism and changing patterns of mechanical parameters of sandwich layers after water immersion shows that:after water immersion,sandwiches dissolve into honeycomb structure with cracks that easily flake,and the residues occupy small space;after water immersion,mechanical strength of sandwiches decrease greatly,susceptible for failure and collapse.Based on the calculation model for critical limited span,the collapse timing was predicted.In addition,laws of thick sandwiches collapse were obtained by numerical simulation,which indicate that the smaller the thickness,the larger the depth,the larger the limited span and storage height of the sandwiches,the more likely the sandwich will collapse.The design idea of "full immersion and secondary cavity construction" was proposed,and cavern leaching design for a 12 meter thick sandwich in a gas storage was made,and tests on two wells were conducted.The results prove that thick sandwiches could collapse,increasing leaching height and single cavity capacity,and the technology is technologically and economically feasible.关键词
盐穴储气库/厚夹层/夹层垮塌/水溶机理/水浸力学参数/造腔设计/造腔试验Key words
salt-cavern storage/thick sandwich/sandwich collapse/water-soluble mechanism/mechanical parameter after water immersion/cavern leaching design/cavern leaching experiment分类
能源科技引用本文复制引用
郑雅丽,王玲欣,赵艳杰,丁国生,武志德,陆守权,赖欣,邱小松,杨冬,韩冰洁..厚夹层盐穴储气库扩大储气空间造腔技术[J].石油勘探与开发,2017,44(1):137-143,7.基金项目
中国石油重大科技专项“地下储气库地质与气藏工程关键技术研究与应用”(2015E-4002) （2015E-4002）
