Abstract
Underground gas storage is the best choice for natural gas resource reserve and peak value. Storage capacity of underground gas storage and single well injection and production capacity are the key indicators of shaving capacity. This paper focuses on research of expansion of gas storage and the stimulation of injection and production capacity of single well of a basin in Western China. Firstly, based on the study of two-phase seepage law of gas and water, a numerical simulation model coupling high velocity non-Darcy effect and gas-water two phase seepage is established; Secondly, the influencing factors of single well injection and production capacity are analysed. Finally, acidizing can effectively improve the single well injection and production capacity of well. The numerical simulation result shows that the injection and production differential pressure is reduced by 70%, and gas injection and production volume are increased by 14.8% and 26.9%.
Highlights
As a clean energy, natural gas is seriously uneven in distribution, and is affected by climatic conditions, civil consumption and other factors
Underground gas storage can solve the problem of uneven urban gas consumption, which plays a important role for seasonal peak shaving
Improving the injection and production capacity of single well is an efficient measure for expansion of gas storage capacity
Summary
Natural gas is seriously uneven in distribution, and is affected by climatic conditions, civil consumption and other factors. Underground gas storage is the efficient measurement choice for natural gas resource reserve and peak value. Underground gas storage can solve the problem of uneven urban gas consumption, which plays a important role for seasonal peak shaving. Improving the injection and production capacity of single well is an efficient measure for expansion of gas storage capacity. This paper focuses on the measures to improve the injection and production capacity of a single well in an underground gas reservoir reconstructed from a depleted gas reservoir in a basin in Western China. The key factors affecting the injection and production capacity of a single well are analysed. The result of numerical stimulation shows that acidizing can effectively improve the injection and production capacity of a single well
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