A method for evaluating the gas injection capacity of a gas storage facility
By collecting bottom-hole flowing pressure and formation pressure in the gas storage facility, and using the Darcy flow equation to establish an injection capacity evaluation method, the problem of inaccurate gas injection capacity evaluation of the gas storage facility was solved, and accurate gas injection capacity prediction and optimization were achieved, while reducing testing costs.
Patent Information
- Application Number
- CN202310772184.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-27
- Publication Date
- 2026-06-30
- Estimated Expiration
- 2043-06-27
AI Technical Summary
Under the conditions of strong injection and production in gas storage facilities, the existing technology directly applies the production capacity testing method of exploration wells, which leads to inaccurate evaluation of the gas injection capacity of injection wells. In addition, the nitrogen supply is limited and the bottom hole flowing pressure is difficult to stabilize, which reduces the accuracy of quantitative analysis of reservoir parameters and gas injection capacity.
The bottom hole flowing pressure and formation pressure of the test well are collected, the relationship equation is derived using Darcy's flow equation, the coefficients of the injection capacity equation are calculated through multiple sets of data, an injection capacity evaluation method is established, the interference from adjacent wells is reduced, and the bottom hole pressure is kept stable.
It enables accurate acquisition of formation pressure data under strong injection and production conditions in gas storage facilities, predicts gas injection capacity, provides a basis for site selection for gas storage facilities and optimization of gas injection well networks, and reduces testing costs and risks.