Gas storage injection-production string screwed joint sealing failure risk determination system and method

Abstract

The invention discloses a gas storage injection-production string screwed joint sealing failure risk determination system and method. The system comprises an injection-production string information module, an injection-production string load calculation module, a parameter probability distribution function determination module and an injection-production string screwed joint sealing failure risk calculation module. The injection-production string information module is used for determining basic data information of an injection-production string; wherein the injection-production tubular columnload calculation module is used for calculating axial load borne by an injection-production tubular column in the gas injection and production process, the parameter probability distribution functiondetermination module is used for determining a probability distribution function of uncertainty parameters, and the injection-production tubular column screwed joint sealing failure risk calculation module is used for calculating the probability of screwed joint sealing failure. The sealing failure risk of the threaded joint of the injection-production string of the gas storage is represented in aprobability form calculated by an injection-production string threaded joint sealing failure risk determination system and method, and the problem that the actual working condition and the actual thread performance condition of an injection-production well are difficult to truly reflect by adopting a method based on historical data statistics is solved.

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 measuring the sealing failure risk of threaded joints of injection-production pipe strings of gas storages. Background technique [0002] The function of "strong injection and strong production" of the gas storage system is a significant feature different from conventional gas fields, which can cause it to bear the effects of alternating ground stress and alternating loads, and may also be affected by corrosion, erosion, equipment failure, operation-related, Under the combined action of potential hazards such as mechanical damage and earthquakes, the stability, safety and reliability of the gas storage are affected. Lessons learned from major accidents in foreign gas storages show that large-scale alternating injection and production and pressure cycle fluctuations can easily lead to geological structure instability of gas...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a system and method for measuring the sealing failure risk of the threaded joint of the injection-production pipe string of the gas storage, so as to solve the technical problem in the prior art that it is difficult to evaluate the sealing failure risk of the injection-production pipe string of the underground gas storage

Images