Salt caverns are underground cavity formed by drilling and water circular melting salt in underground salt layer.
盐穴就是在地下盐层中通过钻井，利用水循环的方法，将盐层溶解，最终形成一个体积较大的空洞。
The seismic, drilling and logging data shows that types of the reservoirs can be divided into crust and inside hill, the reservoir space are mainly fracture and solution cavity.
地震、钻井和成像测井资料的研究表明，潜山带油气藏类型主要有潜山风化壳型和内幕型两类，储集空间以裂缝、溶洞为主。
As one of radial horizontal drilling techniques, high pressure water jet drilling technology is capable of using mechanical or water jet apparatus to make a cavity at the selected coal seam.
高压水射流径向水平孔钻进技术是水平孔施工技术之一，它是在垂直瓦斯抽放或煤层气勘探钻孔布置机械或水力扩孔装置，对准选定的煤层部位进行扩孔。
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