地表土壤中物理吸附轻烃的石油地质意义

doi:10.11743/ogg20060515

Abstract

Abstract:

During a mass and energy exchange between the light hydrocarbon in reservoirs and its environment, a dynamic equilibrium is formed by the light hydrocarbons of all states under the action of sediment surface.The light hydrocarbon physically absorbed by surface soil mainly comes from the reservoirs below and their composition and content can reflect the nature and features of the associated reservoirs.By tracing the composition and content of absorbed light hydrocarbons,the hydrocarbon source(i.e.reservoir)can be located and its quality and characteristics can be predicted.The technology of physical absorption of light hydrocarbon is to completely release the physically absorbed light hydrocarbons from soil samples in a vacuum state and qualitative and quantificational analyse the composition of released hydrocarbon with a gas-chromatogram,so as to predict the quality and characteristics of the reservoir through an observation of the concentration change.The application of the technology in the pilots in Xinchang gas field of Sichuan basin,in Zhenyuan-Jinchuan loess tableland of Ordos basin,and in Chaiwopu Gobi of Tarim basin both with complex surface and geologic conditions gains positive resuits and implies a bright future for its further application and development.

Key words: physical absorption, light hydrocarbon, oil and gas, indicative significance

CLC Number:

TE122.3

Li Guangzhi, Cheng Tongjin, Tang Yuping, Deng Tianlong. Petroleum geological significance of physical absorption of hydrocarbon in surface soft[J]. Oil & Gas Geology, 2006, 27(5): 689-695.

References

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Petroleum geological significance of physical absorption of hydrocarbon in surface soft

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