Experience and Enlightenment of Major Accidents in Underground Gas Storages Rebuilt from Depleted Gas Reservoir Abroad

doi:10.11885/j.issn.1674-5086.2022.05.26.03

Abstract

Abstract: Apparently, China is in the primary stage of underground gas storage construction. Experiences in accident preventions and emergency treatments are insufficient. The study of leaking accidents of foreign underground gas storages have been investigated. Analyzing the probability of leaking accidents, main causes and damages of those underground gas storages is a proper method for guiding China's stable and safe underground gas storages operation. The results of study indicate that storage in gas fields is of the highest accident probability with the greatest damage, and that the main types of accidents include surface facilities damage, trap sealing and wellbore integrity failure. The frequency of accidents from the highest to the lowest is the surface facilities, wellbore and trap. The extent of accident damages from the highest to the lowest is the trap, wellbore and surface facilities. Secondly, this paper focuses on the typical leakage cases of foreign storage in gas fields, and concluded that dynamic monitoring of trap sealing in underground gas storages is significant, and evaluating the fractures and old wells sealing condition are of top priorities during the site selection evaluation. In relation to the current constructing and developing situation of underground gas storages in China, five suggestions are proposed to provide an essential guarantee for the efficient construction and safe operation of underground gas storages in China.

Key words: underground gas storage in gas filed, statistical data, trap sealing, accident probability, emergency system

CLC Number:

TE822

ZHANG Zhe, XU Changfeng, ZHAO Yong, CHEN Yue'e, ZHANG Xinpeng. Experience and Enlightenment of Major Accidents in Underground Gas Storages Rebuilt from Depleted Gas Reservoir Abroad[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 114-120.

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