Should energy storage be used in depleted oil and gas reservoirs?

Utilizing energy storage in depleted oil and gas reservoirs can improve productivity while reducing power costs and is one of the best ways to achieve synergistic development of "Carbon Peak–Carbon Neutral" and "Underground Resource Utilization".

What are the advantages of using depleted reservoirs for energy storage?

The advantages of using depleted reservoirs for energy storage are the availability of detailed geological information and historical production records, lower exploration costs and shorter construction periods.

What is the importance of depleted oil & gas reservoirs?

The development of depleted oil and gas type reservoirs is of great significance to the change of energy structure and the promotion of the development of energy technology, and also lays a solid foundation for the construction and development of smart grids, energy internet and smart cities (Feng 2023).

Which oilfields are converting depleted gas reservoirs into energy storage?

Domestic oilfield enterprises such as Shengli Oilfield, Daqing Oilfield, Qinghai Oilfield, and Jilin Oilfield have already deployed plans to convert depleted gas reservoirs into energy storage and have conducted preliminary exploration.

What is the capping capacity of a gas storage reservoir?

For a gas storage reservoir, the capping capacity of the cap is the ability of the reservoir to prevent the escape of natural gas, which controls the vertical distribution, abundance, and working pressure of natural gas in the reservoir (Liu et al. 2021).

How does ground stress affect a gas storage reservoir?

The ground stress field in a gas storage reservoir varies cyclically with the injection and extraction cycles. In addition to varying degrees of elastic–plastic deformation, localized stress concentrations may be induced, and such stress concentrations can accumulate in the rock and form fatigue damage.