Simul ation of the Hydrocarbon Generation and Expul sion of Coal by Hydrous Pyrolysis
-
摘要: 用加水热模拟实验对采于我国胜利油田附近的石炭系太原组亮褐煤（R0＝0．56%）生烃潜力进行研究。煤样富含镜质组（74．5%），壳质组少（8．8%），惰性组占16．7%，其中镜质组以富氢的基质镜质体为主。煤样裂隙发育，形成于滨海沼泽相沉积环境。实验设200℃、230℃、260℃、290℃、320℃和350℃六个温度点，每个温度点加热72小时。实验结果表明该煤具有较高的生烃潜力和排油效率。其液态烃大量生成和排出始于R0＝0．76%（290℃），在R0＝1．18%（320℃）时达高峰。气态产物从R0＝1．18%大量形成，直到R0＝1．53%（350℃）继续增大。实验分析认为煤的生烃能力除了与其有机质类型、有机质丰度等有关外，还与其形成的沉积环境有关，缺氧的还原环境是煤作为烃源岩形成和保存的有利沉积环境。裂隙的发育有助于煤成油的排驱和运移。Abstract: Hydrous pyrolysis experiment was carried out using Carboniferous bright brown coal(R°=0. 56%)nearShengli Oil-field , East China to evaluate the hydrocarbon generation potential of coal. The coal sample is vitri-nite-rich ( 74. 5%)and liptinite-poor ( 8. 8%)with inertinite of 16. 7%.Much of vitrinite in the sample con-sists of hydrogen-rich desmocollinite. The hydrous pyrolysis was performed at 200℃，230℃，260 ℃，290 ℃，320℃and 350`℃for 72 hours，respectively. Both total pyrolysates and expelled oil increased with temperaturebefore reaching their maximum yields at 320'C (R°=1. 18%)，and decreased afterwards. The gaseous prod-ucts increased sharply at 3200℃(R°=1. 18%)and tended to increasing evenly at their peak yield point of350'℃(R°=1. 53%).The results show that the coal has a higher hydrocarbon generation potential and expul-sion effeciency. It is proposed that the hydrocarbon potential of coals depends not only on their organic mat-ters but also on their depositional environments. Reducing conditions are favorable depositional environmentfor oil-prone coal. The fractures and cleats are beneficial to the expulsion of the oil from coal.
-
Key words:
- generation potential /
- expulsion efficiency /
- hydrous pyrolysis /
- depositional environment /
- coal
-
[1] 1 Shanmuga G. Significance of coniferous rain forests and related or-ganic matter in generation commercial quantities of oil, GippslandBasin. Australia. AAPG , Bull. 1985 , 69 s 1241-1254
2 Durand B,Partte M. Oil potential of coal-a geochemical approach.In s Brooks J , ed. Petroleum Geochemistry and Exploration of Eu-rope.1984. 255"-265
3 黄第藩，张大江，李晋超等.中国吐鲁番盆地侏罗系煤系中烃类生成.第四届全国有机地球化学会议论文集.武汉;中国地质大学出版社，1990. 15
4 Hunt ] M. Generation of gas and oil from coal and other terrestrialorganic matter.Org. Geochem. 1991,17C6):673-680
5 Lewan M D. Evaluation of petroleum generation by hydrous pyroly-sis experiments. Phil. Trans. Royal Sci,Agt5,1985.123-134
6 Ritter U. Myhr M B, Vinge T. Experimental heating and kineticmodels of source rocks; Comparison of different methods. Org.Geochem.1995,23(1):1-9
7 Solmon P R,Serio M A,Carangelo R M,et al. Analysis of Argonnepremium coal samples by thermogravimetric FT. IF spectroscopy.Energy Fuels,19906,4:319-333
8 Sweenev 1 1,Burnham A K,Braun R I_. A model of hydrocarbon generation from Type I kerogen: Application to Unita Basin, U- tah. AAPG Bu11,1987,71:967一985
9 Mukhopadhyay P K, Samanta V , Jassal J. Origin of oil in a lagoon environment: desmocollinite/bituminite source rock concept. Compte Rendu,1985,4:753}763
10 刘德汉，孙永革，申家贵等.吐哈盆地及二连盆地侏罗系煤微类 脂组分的共聚焦激光扫描显微镜(CLSM)研究及油气意义.地 球化学，1996.25(4):309一315
11 赵师庆.实用煤岩学.北京:地质出版社，1991. 38}-90
12 Scott A C, Fleet A J. Coal and coal-bearing strata as oil-prone source rocks: Current problems and future directions. Geological Society Special Publication,1994,C77):201-205 -
点击查看大图
计量
- 文章访问数: 656
- HTML全文浏览量: 42
- PDF下载量: 456
- 被引次数: 0
下载:
