Characteristics of Laser-induced Fluorescence of Some Typical Coals From China and Their R-I-VRo Model
-
摘要: 利用激光显微荧光探针、MPV－Ⅲ显微光度计等方法系统地研究了我国典型煤的激光显微荧光特征，并运用二项参数（I400、R）与澳大利亚同期煤进行了对比，结果发现我国煤的I400普遍比澳大利亚同期煤高，据此，建立了我国煤的R－I－VRo相关模式留，该图对于正确评价我国烃源岩成熟度具有重要意义。Abstract: The Characteristics of fluorescence alteration of some typical coals from China has been investigated by means of laser microprobe. The results show that there are three fluorescence alteration patterns for telocolli- nite. They are positive alteration, negative alteration and negative -positive alteration,depending on the thermal maturation levels of these samples. They occur at VRo less than 0.60%,more than 1.10%,0.60-1.10%,respectively. Two alteration parameters:I4oo and R have been selected to differentiate the fluorescence alteration between Chinese coals and Australian coals. The results indicated that the R-I curve of the Chinese coals is quite similar to that of the Australian coals. However, I400 of telocollinite in the Chinese coals is higher than that of the Australian coals, up to 1000-2000 relative intensity units. The measured VRo of the Chinese coals is different from EqVRo(equivalent vitrinite reflectance) which was derived from their fluorescence parameters in the R-I-VRo model based on the Australian coals, with a higher EqVRo value by 0.0l%-0.04%.According to this,a R-I-VRo model based on the fluorescence characteristics of the Chinese coals has been suggested. This model can be used to correct the measuring vitrinite reflectance for source rocks from Chinese petroliferous basins more correctly than the model of the Australian model. A case study was given for some typical samples from Tuha Basin. The results are plotted to this model. It presents that EqVRo is very close to the measured VRo.
-
Key words:
- laser microprobe /
- fluorescence alteration /
- vitrinite reflectance /
- telocollinite /
- R-I-VRo model
-
[1] 1 Wilkins R W T,et al. Fluorescence alteration and the suppression ofvitrinite reflectance[J].Org. Geochem.,1992,18, 629-640
2 Wilkins R W T,et al. Should fluorescence alteration replace vitrinite reflectance as a major tool for thermal maturity determination in oil exploration?[J]. Org. Geochem.,1995, 22,191-209
3 肖贤明，刘德汉，傅家漠等.海相镜质体—海相烃源岩中一种重要生烃母质CJ).石油学报，1997,C1):44-48
4 赵师庆，王飞宇，刘德汉等.不同煤相中煤和镜质组特征的初步研究[J].中国科学院地球化学研究所有机地球化学开放室研究年报(1987)[C].北京:科学出版社，1988, 23-44
5 Davis A, Rathbone R F, RuiLin, et al. Observation concerning thenature of maceral fluorescence alteration with time[J]. Org.Geochem.,1990,16: 897-906
6 肖贤明.有机岩石学及其在油气评价中的应用[M].广州:广东科技出版社，1992. 113-122
7 Veld H, Wilkins R W T,Xiao Xianming,et al. A fluorescence alteration of multiple macerals (FAMM) study of Netherland coal with "Normal" and "deviating" vitrinite reflectance[J].Org. Geochem.，1997,26,247-255 -
点击查看大图
计量
- 文章访问数: 531
- HTML全文浏览量: 37
- PDF下载量: 311
- 被引次数: 0
下载:
