Organic Facies Studies and Their Use in Sedimentary Basin Analysis
-
摘要: 有机相是具有一定丰度和特定成因类型的有机质的地层单元，决定有机相类型的最重要参数是干酪根的成因类型。为了反映沉积盆地中有机相的时空分布，我们提出了有机相组合和盆地有机充填序列等新概念。有机相及有机相层序、有机充填序列和有机相组合不仅是预测和在三维空间确定生油岩的分布、预测主力生油岩的排烃期和排出产物的组成的有效工具，而且可以弥补以骨架砂岩体为主要研究对象的沉积学分析的不足，在确定层序界线或不整合面的位且、研究盆地的构造沉降和沉积充填史等方面发挥重要作用。
-
关键词:
- 有机相 /
- 有机相层序和有机相组合 /
- 盆地有机充填序列 /
- 盆地分析
Abstract: An organic facies is defined as a mappable stratigraphic unit containing organic matter (OM)of a particular genetic type in cartaain abundance. A new organic facies classification，which is based on indicative genetic kerogen(OM)type。is proposed. The improved definition and classification makes organic facies capable of reflecting the origin，diagenetic alternation of organic matter comprehensively, and，the organic facies thus defined and classified，which must be identified on the basis of synthetical parameters other than by atomic H/C ratios and/or Rock-Eval Hydrogen Index values merely. Several new concepts concerning organic facies such as Vertical Organic Facies Sequence ( VOFS )，Organic Facies Association ( OFA ) and Organic Basin-fill Sequence ( OBFS ) are advanced, and their significance in basin analysis is discussed in detail.Several cases are presented in this paper which confirm that organic facies, especially VOFS，OFA and OBFS analysis can not only become a very usefull tool for prediction and three-dimensional mapping of petroleum source rocks, but also make up for some shortcomings of sedimentological studies that put the stress on coarse rocks, and therefore may play a distinctive role in identifying and accurately locating unconformities or sequence/ systems tract boundaries as well as in reconstructing the tectonic subsidence and sedimentary fill histories of sedimentary basins. -
[1] 黄第落，李晋超,1984.陆相有机质演化和成烃机理，北京:石油工业出版社。 [2] 李思田，1988，断陷盆地分析与煤聚集规律，地质出版社。 [3] 那芳，陈建渝.1991，有机地球化学基础理论和勘探应用的新进展，地质科技情报。 [4] 郝芳，陈建渝,1993，论有机质生烃潜能与生像的关系及干酪根的成因类型.现代地质，(1):57~65. [5] 那芳，陈建渝.1994，沉积盆地的有机相研究及其在油气资探评价中的应用，矿物学岩石学论丛(9)，地质出版社，101-109, [6] Demaison G. J. et al.，1983, Predictive source bed stratigraphy, a guide to regional petroleum occurtence. In Proc. of Eleventh World Petroleum Congress, 2.17~29. [7] DemaL9on G. J. and Moore G.. T.，1980. Anoxic environments and oil source bed genesis. Organic Geochemistry 2. 9~31. [8] liao Fang and Chen Jianyu, 1992, The cause and mechanism of vitrinite reflectance anomalies. Journal of Petroleum Geology15(4);419~434. [9] Hao Fang. Chen Jianyu, Sun Yongchuan and Liu Yiao2hong, 1993, Application of organic fades studies to sedimentary basin analysis, a case study from the Yitong Graben ,China.Org.Geochem.20(1);27~42. [10] Jones R. W.，1989. Comparison of carbonate and shale source racks. In Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks(Fdited by Palaces J. G.),AAPG Studies in Geology 18. 163~180. [11] Jones R. W.，1987. Organic Fades, In Advances in Petroleum Geochemistry I (Edited by Brooks J. and Welte D.)，1~90. [12] Veil P. R.，1987 , Seismic stratigraphy interpretation using sequence stratigraphy. Part 1; seismic stratigraphy interpretation procedure. In Atlas of Seismic Stratigraphy, Vol. 1(Edited by Belly A. W.)，AAPG Studies in Geology. 27, 1~10. -
点击查看大图
计量
- 文章访问数: 607
- HTML全文浏览量: 14
- PDF下载量: 518
- 被引次数: 0
下载:
