Discussion on Relationships of Organic Sulfur in Continental Deposit Low-mature Source Rocks and Kinetics of Pyrolysis Hydrocarbon Generation
-
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（E）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（Emin）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。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 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.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( Emin)of activation energy distribution or the value (ESEmin)of activation energy distribution after soluable organic matter are extracted from these rocks. ④Soluable organic matter dis- tributing in the activation energy distributive intervals [ Emin,ESEmin] ( Emin < ESEmin) 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.
-
[1] 1 Gransch J A, Posthuma J.On the origin of sulfur in crudes.In: Tis- sot B P and Bienner F, eds.Advances Organic Geochemistry 1973. Paris: Edition Techniq, 1974.723～739
2 Orr W L. Kerogen/ asphaltene/sulfur relationships in sulfur-rich Monterey oils.Org.Geochem., 1986, 10: 499～516
3 Sinninghe Damste J S, Eglinton T I, De Leeuw J W, Schenck P A. Organic sulphur in macromolecular sedimentary organic matter: I. Structure and origin of sulpher-containing moieties in kerogen, as- phaltenes and coal as revealed by flash pyrolysis.Geochim.Cos- mochim.Acta, 1989, 53: 873～889
4 Baskim D K, Peter K E.Early generation characteristics of a sulfur - rich Monterey kerogen.AAPG Bull., 1992, 76(1): 1～13
5 Tissot B P, Pelet R, Ungerer P.Thermal history of sedimentary basin, m aturation indices and kinetics of oil and gas generation. AAPG Bull., 1987, 71(2): 1445～1466
6 Hunt J M, Lewan M D, Hennet R J-C.Modelling oil generation with time- temperature index graphs based on the Arrhenies equa- tion.AAPG Bull., 1991, 75(4): 795～807
7 王铁冠, 钟宁宁, 侯读杰等.低熟油气形成机理与分布. 北京: 石油 工业出版社.1995.211～222
8 周光甲.陆相块断盆地中的低熟油.有机地球 化学论文 集.北京: 地质出版社.1987.21～37
9 Sinninghe Damste J S, De Leeuw J W.Analysis, structure and geo- chemical significance of organically-bound sulphur in the geo- sphere: State of the art future research.Org Geochem., 1990, 16(4 ～ 6): 1 077～1 101 -
点击查看大图
计量
- 文章访问数: 437
- HTML全文浏览量: 2
- PDF下载量: 415
- 被引次数: 0
下载:
