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我国已建盐穴储气库(金坛)和拟建盐穴储气库(平顶山、淮安、楚州、云应等)都为层状盐岩储气库,含盐地层具有盐层薄、夹层多、不溶物含量高等特点,与国外盐丘建库相比,我国盐穴储气库面临着造腔速度慢、腔体形态控制难、成腔效率低等技术难题。因此文中主要针对我国层状盐层造腔过程中面临的主要建库技术难题,提出精细造腔控制,优化造腔方案,深入研究水溶机理和夹层垮塌机理来解决造腔速度慢、造腔控制难技术难题,应用定向水平井和盐腔底部残渣空隙空间利用来解决成腔效率低技术难题。
The salt cavern gas storage (Jintan) and the proposed salt cavern gas storage (Pingdingshan, Huai’an, Chuzhou, Yunying, etc.) have all been stratiform salt rock gas storage reservoirs in China, and the salt-bearing strata have thin salt layers, Mezzanine and high content of insoluble matter. Compared with the salt dome reservoir building in our country, the salt cavern gas storage in China faces the technical problems of slow cavity making, difficult cavity shape control and low cavity forming efficiency. Therefore, the paper mainly aims at the main technical problems of reservoir construction in the process of making stratiform salt strata in our country, puts forward the method of fine cavitation control, optimization of cavitation program, in-depth study of water-soluble mechanism and mezzanine collapse mechanism to solve the problems of slow cavity making and cavity control Difficult technical problems, the application of directional horizontal wells and the bottom of salt cavity empty space utilization to solve the problem of low cavity efficiency technical problems.