Geochemical Characteristics And Pool-forming Model Of Carboniferous Volcanic Source Rocks In Santanghu Basin

Carboniferous reservoirs in Santanghu Basin show the characteristics of near-source reservoir formation.This study focuses on the distribution and migration of hydrocarbon source stoves.The main factors of reservoir formation control are studied through geochemical characteristics of source rock,oil source correlation,evaluation for source rock single well and comprehensive evaluation,prediction of hydrocarbon source rock distribution,structural evolution and source rock evolution,being combined with reservoir anatomy and distribution of high quality reservoir,.Finally,a favorable zone is proposed.Study on the relationship between source rocks and source-stoves,is based on source rock evaluation(including evaluation of logging source rock,single well geochemical evaluation and source rock comprehensive evaluation),oil source correlation(including correlation between oil,and oil-rock correlation)and source rock prediction(calculatingsingle well thickness,seismic phase method).Finally,the migration and evolution of hydrocarbon source range are determined by combining the history of stratigraphic burial and structural evolution.The study of reservoir forming model is to analyze the reservoir cap and its assemblage characteristics,fluid and pressure characteristics,oil source and filling conditions,and the relationship between reservoir formation and configuration o determine the main controlling factors of reservoir formation through the study of reservoir forming system.The distribution of hydrocarbon source stoves,the relationship between source and stove,the formation and distribution of high-quality reservoirs are analyzed to dividereservoir formation system,and carry out further studies on the characteristics of reservoir formation.Finally,the reservoir forming model and favorable zone are put forward to lay a solid foundation for the fine evaluation and reservoir enhancement of volcanic reservoirs in Santanghu Basin in the future.