一种基于U型盐穴储气库的垫底气替代及注采方法
By using non-reactive gases such as nitrogen or carbon dioxide as cushion gas in U-shaped salt cavern gas storage facilities and by accurately calculating the injection and production parameters at each stage, the problem of wasted cushion gas resources in U-shaped salt cavern gas storage facilities has been solved, and safe and efficient injection and production of natural gas has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2022-07-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing U-shaped salt cavern gas storage facilities require a large amount of inert gas as a base gas to maintain the internal pressure and stability of the cavity, resulting in resource waste and capital stagnation.
Using gases that do not react with natural gas, such as nitrogen or carbon dioxide, as the base gas, and by accurately calculating the first injection volume, the first stage brine discharge volume, the first stage injection volume, the second stage brine discharge volume, and the second stage injection volume, the safe and high-purity injection and production of natural gas is achieved by utilizing the operating pressure, cavity depth, and space volume of the U-shaped salt cavern gas storage tank.
It has achieved safe and high-purity natural gas injection and production, reduced the amount of underlying gas used, lowered costs, avoided the risk of cavity collapse and leakage, and improved resource utilization efficiency.
Smart Images
Figure CN117514079B_ABST