METHOD OF ACID GAS TREATMENT FOR INJECTION INTO FORMATION THROUGH INJECTOR Russian patent published in 2014 - IPC E21B43/40 B09B1/00 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry and namely to treatment methods of an acid gas containing hydrogen sulphide and carbon dioxide for injection into a formation through an injector. The concept of the invention is as follows: according to the method treatment of the acid gas for injection into the formation through the injector is made by the acid gas delivery to several compression and cooling stages at a temperature of 40÷60°C, drying of the compressed acid gas by glycol at a compressive pressure and temperature of 45÷65°C, transition of the dried gas into liquid state by further compression and cooling up to a temperature of 40÷65°C. At that before delivery to the compression stage acid gases are mixed with a liquefied gas C₃-C₅ or natural gasoline in quantity of 10÷40% by weight. Compression-cooling and drying of the acid gas is made at a pressure up to 0.4÷0.6MPa and its transition to liquid state is made at a pressure up to 0.8÷4.0MPa.

EFFECT: reduction of power consumption, reduction of gas hydrate formation risk, decrease in the number of compression and cooling stages for acid gases and utilisation of associated liquefied gases and natural gasoline containing hydrogen sulphide.

2 ex, 1 dwg