Discussion on Relationships of Organic Sulfur in Continental Deposit Low-mature Source Rocks and Kinetics of Pyrolysis Hydrocarbon Generation

Key words: 
• continental source rock /
• low-maturation /
• organic sulfur /
• hydrocarbon-generating kinetics

Abstract: discuss Relationships of organic sulfur in continental deposit low -mature source rocks and kinetics of py- rolysis hydrocarbon generation have been discussed.These rocks are gathered from Dongying depression in China and their organic matter maturities are not in excess of value R_o= 0.5 %( R_o as vitrinite reflectance). From studied results, we can observe such relationships as follows: ①There is a negative correlation between the organic sulfur contents and values of vitrinite reflectances.② The higher organic sulfur contents in these source rocks, the lower average activation energies of these rocks.③There is a positive correlation between or- ganic sulfur content and the least value( E_min)of activation energy distribution or the value (E^SE_min)of activation energy distribution after soluable organic matter are extracted from these rocks. ④Soluable organic matter dis- tributing in the activation energy distributive intervals [ E_min,E^SE_min] ( E_min < E^SE_min) not only has hydrocarbons generation ability, but also there is a certain correlation trend between the yield of accumulating hydrocarbon and the sulfur content.⑤Putting all above aspects together, authors point out organic sulfur in low -mature Shasi(Es₄)source rocks of Dongying depression maybe havea certain act on the course of hydrocarbon genera- tion in the study area.