Study of Various Causes of Sour Gas Penetration in Asmari Formation, Marun Oil Field, SW.Iran

The present paper deals with one of the most serious problems in oil production, that is sour gas (H2S). This gas enters to oil zone from gas cap due to an appreciable pressure gradient that exists between oil and gas cap zones. The contamination of oil zone with sour gas may be due to lower layers that are interconnected with reservoir or it can be from gas injection wells also. Associated with oil, because of containing various kinds of ions and corrosive materials, it causes very dangerous problems on well equipment, well head, pipe line, etc. Sour gas also can cause corrosion problems and depreciation on the equipment. If the sour gas treatment is not sufficient, then it is necessary to decrease oil production which is not reasonable economically.The main objective of present research work is to investigate the effective parameters on sour gas creation such as pressure drop, permeability and fractures in Marun Oil Field. Hence the usual methods for prevention, such as microbial action, balanced production and sweet gas injection will be explained. Finally the effect of sour gas in the sixth sector of Marun oil field and methods for prevention of this problem has been discussed here

کلیدواژه ها:

Sour gas ، contamination ، injection ، permeability ، preventation