Prediction system and method of underground gas storage earthquake hazard

Abstract

The invention discloses a prediction system and a method of underground gas storage earthquake hazard and belongs to the technical field of underground gas storage risk evaluation. The prediction system of the underground gas storage earthquake hazard comprises an earthquake source confirming module, a peak ground acceleration calculation module, a peak ground acceleration threshold confirming module, an earthquake recurrence interval calculation module and a probability calculation module. The earthquake source confirming module is used for confirming the earthquake source length of the underground gas storage and the distance between the earthquake source and the underground gas storage, the peak ground acceleration calculation module is used for calculating the relationship between the peak ground acceleration and the earthquake frequency, the peak ground acceleration threshold confirming module is used for confirming and obtaining the peak ground acceleration threshold of the underground gas storage, the earthquake recurrence interval calculation module is used for calculating and obtaining an earthquake recurrence interval which surpasses the peak ground acceleration threshold, and the probability calculation module calculates and obtains a prediction probability of invalidness of the underground gas storage caused by the earthquake according to the earthquake recurrence interval and the designed service life of the underground gas storage. According to the prediction system and the method of the underground gas storage earthquake hazard, the underground gas storage earthquake hazard is represented in a probability form, and technical support can be provided to underground gas storage risk evaluation.

Description

technical field [0001] The invention belongs to the technical field of risk assessment of underground gas storages, and relates to a system and method for predicting earthquake hazards of underground gas storages. Background technique [0002] The development of underground gas storage in my country began in the early 1990s. After nearly two decades of development, underground gas storage has played an important role in balancing the natural gas pipeline network and regulating regional balanced gas supply. In 2000, Dazhangtuo, my country's first gas reservoir-type gas storage, was put into operation. In 2005, my country's first salt-cavern gas storage, Jintan Gas Storage, was put into construction. By the end of 2011, 11 gas storages had been put into operation, and 5 new ones had been built. 5 were evaluated in the early stage, including 16 of depleted oil and gas reservoir type and 5 of salt cavern type, mainly of depleted oil and gas reservoir type. [0003] Although the ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a system and method for predicting earthquake hazards of underground gas storages, which solves the technical problem that the seismic hazards of underground gas storages are difficult to evaluate in the prior art

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