Injected gas acidification method
A technology for injecting gas and gas, which is used in the fields of fluid production, earth-moving drilling, wellbore/well components, etc. It can solve the problems of insufficient energy in low-pressure formations, incomplete flowback of residual acid, and low production of oil wells, so as to reduce the secondary The effect of damage, strong applicability, and high input-output ratio
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[0031] The method steps of the preferred embodiment of the present invention are as follows:
[0032] 1) Gas injection: connect the gas pressure equipment pipeline, and inject gas into the formation through the gas pressure equipment;
[0033] The volume of injected gas is calculated by the following formula according to the site conditions:
[0034] P1*V1 / T1=P2*V2 / T2
[0035] Among them: P1 is the pressure of surface injected gas, V1 is the volume of surface injected gas, T1 is the temperature of surface injected gas; P2 is the formation pressure, V2 is the underground volume, and T2 is the formation temperature.
[0036] The surface injected gas pressure P1, the surface injected gas temperature T1, the formation temperature T2, and the formation pressure P2 are all measured on-site. After determining the underground volume V2 to be injected, the surface injected gas volume V1 can be calculated.
[0037] The gas includes but is not limited to air, nitrogen, carbon dioxide, similar gases...
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