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- W2391738807 abstract "The central gas field in the Ordos Basin is one of the largest gas fields in China.The source and origin of natural gas from the Ordovician paleo-weathering crust have been studied extensively but remained unclear since the discovery of the gas field.It is of significantly importance for the source of the natural gas of the central gas field to understand whether the carbonate rocks of the Majiagou Formation of the Ordovician in the Ordos Basin are effective source rocks or not and where is the main distributing area of the effective source rocks.Comparative study of organic carbon contents,chloroform asphaltAcontents and characteristics of biomarker compounds of saturated hydrocarbons of the carbonate rocks of the Majiagou Formation of the Ordovician in the west and south and central and east regions,and the analysis of the relationship between the geochemical characteristics and depositional environments of the Majiagou Formation of the Ordos Basin,reveal that the carbonate rocks of the Majiagou Formation in the west and south regions of the Ordos Basin,deposited mainly under open marine,weakly oxidized to weakly deoxidized environment,generally show low organic carbon content and low proportion of effective gas source rock with TOChigher than 0.3%;while the carbonate rocks of the Majiagou Formation in the central and east regions of the Ordos Basin,deposited under lagoon or platform evaporate,strong deoxidized environment,show relatively higher organic carbon content and high proportion of the effective gas source rock with TOChigher than 0.3%.It could be proposed that the carbonate rock of the Majiagou Formation in the central and east regions of the Ordos Basin is the main source rock of oil-type natural gas accumulated in the central gas field." @default.
- W2391738807 created "2016-06-24" @default.
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- W2391738807 date "2015-01-01" @default.
- W2391738807 modified "2023-09-23" @default.
- W2391738807 title "Comparisons of Geochemical Characteristics of Ordovician Majiagou Carbonate Rocks between West and South and Central and East Regions of Ordos Basin" @default.
- W2391738807 hasPublicationYear "2015" @default.
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