陆相低成熟烃源岩有机硫与热解成烃动力学关系初探  

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

作　　者：沈忠民[1,2] 周光甲[1,2] 洪志华[1,2] 

机构地区：[1]成都理工学院石油系"油气藏地质及开发工程"国家重点实验室 [2]胜利油田地质科学研究院

出　　处：《沉积学报》1998年第4期133-139,共7页Acta Sedimentologica Sinica

基　　金：中国博士后科学基金;"油气藏地质及开发工程"国家重点实验室基金共同资助

摘　　要：对陆相低成熟烃源岩（Ｒｏ≤０．５％）有机硫与成烃动力学关系进行了研究。结果表明：①有机硫含量与镜质体反射率（Ｒｏ）之间呈负相关关系，即有机硫含量随成熟度提高而减少；②源岩的平均活化能（）有随有机硫含量增大而减小的趋势；③有机硫含量与源岩活化能分布最小值（Ｅｍｉｎ）和经可溶有机质抽提后的活化能分布最小值（ＥＳＥｍｉｎ）之间存在正相关关系；④活化能分布范围Ｅｍｉｎ～ＥＳＥｍｉｎ（ＥＳＥｍｉｎ＞Ｅｍｉｎ）内的可溶有机质生烃能力与有机硫含量具有一定的相关性；⑤综上结果推断东营凹陷南斜坡东段沙四段（Ｅｓ４）源岩中的有机硫在成烃过程中可能起到了一定的作用。discuss Relationships of organic sulfur in continental deposit low-mature source rocks and kinetics of pyrolysis 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 Ro=0.5%(Ro 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.②The higher organic sulfur contents in these source rocks,the lower average activation energies of these rocks.③There is a positive correlation between organic 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 distributing 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(Es 4)source rocks of Dongying depression maybe havea certain act on the course of hydrocarbon generation in the study area.

关 键 词：陆相源岩 低成熟 有机硫 成烃动力学 石油成因 

分 类 号：P618.130.1[天文地球—矿床学] P618.130.4[天文地球—地质学]