The proposed Ningjin salt cavern gas storage facility is the world's deepest salt cavern gas storage facility, facing significant technological challenges. Its geological feasibility needs to be fully analyzed before formal construction. This article preliminarily demonstrates the geological feasibility of building a reservoir in this area from the aspects of geological conditions, storage capacity, and long-term reservoir planning. The results show that the salt series strata in the Ningjin Shi Salt Field have a large sedimentary thickness, stable spatial distribution, high ore content, and few interlayers, which is conducive to the development of water solution cavity building. The cover layer and interlayer are mainly composed of mud shale, with dense lithology and high sealing properties. However, the VF6 fault near the Z1 data well breaks through the rock salt ore body, and this fault should be reasonably avoided during the official construction of the database. In addition, the proposed reservoir has a large burial depth and a high rate of salt rock creep. Therefore, detailed research on the long-term operational stability of the reservoir is needed in the later stage. Based on the early salt mining and Geological survey, the optimal reservoir construction area and long-term planning alternative area are delineated, and their storage capacities are preliminarily estimated to be (6.4~6.9)×109 m3 and (2.6~2.8)×109 m3, with good gas storage potential.
Hou Bingren
,
Wang Xuxue
,
Niu Yaohui
,
Yu Changfu
,
Li Zhiqiang
. Geological Feasibility Analysis of the Construction of Super Deep Salt Cave Gas Storage in Ningjin, Hebei Province[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S1)
: 472
-481
.
DOI: 10.20174/j.JUSE.2024.S1.55
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