Geochemical Characteristics of Gas Accumulation in Hubuzhai Gas Field,Dongpu Depression

Abstract

Abstract: The origin and phase state of natural gas migration in Hubuzhai gas field, Dongpu Sag are discussed based on the study on hydrocarbon composition, carbon and argon isotope of natural gas and light hydrocarbon. Combined with analysis of the history of hydrocarbon generation of source rock and fault activity, the accumulation time and history of gas are comprehensively determined. It is indicated that the gas in the lower Es₃and Es₄in Hubuzhai gas field was mainly coalformed from C-P in the Es₁depositional stage and it migrated mostly in free phase. There is a litle oil-type gas in low Es₃ to up Es₄in Puwei sub-sag in the Ed depositional stage.

Key words: Hubuzhai gas field, geochemistry, gas source, phase state, accumulation stage

LI Zong-liang et al. Geochemical Characteristics of Gas Accumulation in Hubuzhai Gas Field,Dongpu Depression[J]. 西南石油大学学报(自然科学版), 2008, 30(2): 57-60.

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Geochemical Characteristics of Gas Accumulation in Hubuzhai Gas Field,Dongpu Depression

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