SECONDARY RECOVERY BY AIR INJECTION IN SHIXI OILFIELD, JUNGGAR BASIN

Abstract

Abstract: With respect to the geologic features in Shixi oilfield the secondary recovery process by air injection is recommended. It has the following production mechanism: the oxidization reaction between the oxygen (21%) in the air and resin and asphaltane present in the oil produces the flue gas (85% N₂ and 15% CO₂) which forms the flue gas cap on the structural high due to the gravity differentiation. Therefore, for the high-temperature high-pressure light oil reservoirs, air injection is in essence an indirect flue gas flooding process.

Key words: Junggar basin, Shixi oilfield, Carboniferous, Volcanic reservoir, Secondary recovery, Air injection, Gravity flooding, 0il displacement eficiency

Guan Misheng. SECONDARY RECOVERY BY AIR INJECTION IN SHIXI OILFIELD, JUNGGAR BASIN[J]. Xinjiang Petroleum Geology, 1997, 18(2): 165-169.

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SECONDARY RECOVERY BY AIR INJECTION IN SHIXI OILFIELD, JUNGGAR BASIN

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