STUDY ON THE ORGANIC PETROLOGY OF THE LOWER TERTIARY SOURCE ROCK IN THE JIANGHAN BASIN
-
摘要: 作者采用有机岩石学全岩分析技术,系统研究了江汉盆地下第三系烃源岩的显微组分组成、生烃组分及有机质热演化。江汉盆地烃源岩形态显微组分含量明显偏低,平均仅占全岩体积的1.5%。显微组分组成中富含腐泥组,相对发育镜质组和壳质组,贫惰性组。有机质类型多为Ⅱ、Ⅰ型。藻类体、矿物沥青基质是该区主要生烃组分。文中利用镜质体反射率Ro及富氢组分和非烃馏分的荧光参数探讨了江汉盆地烃源岩有机质演化特征,提出了有机质的热演化阶段的划分方案。Abstract: The bulk-rock analysis technology of organic petrology was used in this paper to systematically study the maceral composition, hydrocarbon-generating components and organic thermal-evolution of the Lower Tertiary source rock in the Jianghan Basin. The morphologic maceral content of source rock in the Jianghan Basin is apparently on the low side. On an average, it only takes 1.5 percent of the whole rock volume. Sapropelite is rich in the maceral composition, vitrinite and exinite are relatively developed, and inertinite is poor. The organic matter is dominated by Ⅱ and Ⅰ types. Alginite and mineral bituminous matrix are the main hydrocarbon ge nerating componets of this area. By using vitrinite reflectance and the fluorescence parameters of hydrogen enriched components and non hydrocarbon fractions, the evolutionary characteristics of organic matter in the source rock of the Jianghan Basin were discussed, and the classification scheme of thermal-evolutionary stages for the organic matter was suggested.
-
Key words:
- maceral /
- thermal-evolution /
- hydrocarbon-generating component /
- organic petrology /
- the Jianghan Basin
-
[1] 李贤庆,马安来,钟宁宁.烃源岩有机岩石学研究方法与应用[M],重庆:重庆大学出版社,1997.16-29. [2] 王铁冠,钟宁宁,侯读杰,等.低熟油气形成机理与分布[M].北京:石油工业出版社,1995.20-40. [3] Smyth M, Cook A C, Philp R P. Birkhead revised:petrological and geochemical studies of the Birkhead formation, Eromanga Basin[J]. APEA, 1984,24(1):230-242. [4] Largeau C, Derenne S, Casadevall E, et al. Occurrence and origin of "ultralaminar" structures in "armorphous" kerogen of various source rocks and oil shale[J]. Organic Geochemistry,1990, 16(4-6):889-895. [5] Zhao S Q, Zhong N N, Xiong B,et al. Organic geochemistry and coal petrology of Tertiary coal in Zhoujing mine, Baise basin, South China:(Ⅰ) Occurrence and significance of exudatinite[J]. Fuel, 1990, 69(1):4-11. [6] 王培荣,陈奇,何文祥,等.未熟-低熟阶段有机质的"两极分化"作用——低温低压加水热模拟实验[J],科学通报,1999,44(2):208-211. -
计量
- 文章访问数: 978
- HTML全文浏览量: 157
- PDF下载量: 538
- 被引次数: 0