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Application of fluid inclusion in oil-gas source trace.

TAO ShiZhen, ZHANG BaoMin and ZHAO ChangYi Research Institute of Petroleum Exploration and Development of China , Beijing 100083, China  
Based on section observation and petro-mineralogy research, gas source of large gas fields of carbonate in Sichuan Basin are probed into with fluid inclusion method. First, the autogenecity, multistage and re-equilibrium of inclusion are subtly distinguished. Based on this, oil-gases of different stages are distinguished according to microelements of autogenetic minerals, phase composition, homogenization temperature of inclusions and water medium conditions. The humic gas and sapropelic gas are primarely differentiated with quantitative laser raman microfrobe spectroscopy. The source (humic or sapropelic rocks) of organic matter in inclusions are distinguished according to phase composition and distributing characteristics of inclusions. In the end, source rock stratum of a certain period oil-gas are ascertained with the biomarkers of corresponding inclusions. The result indicate that researchful conclusions accord with geological facts, which provide an important and effective method for the conventional research of oil-gas source trace.
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