Evolutive characteristics of aromatics under high pressure and temperature of deep lithosphere  

作　　者：WANG ChuanYuan1,2,4, DU JianGuo1?, DUAN Yi 2, XIE HongSen3, CHEN GuoJun2 & WANG WanChun2 1 Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China 2 Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China 3 Insititute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 4 Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, China 

出　　处：《Science China Earth Sciences》2007年第10期1488-1493,共6页中国科学（地球科学英文版）

基　　金：Ministry of Science and Technology of China (Grant No. 2005DFA20980);National Natural Science Foundation of China (Grant No. 10299045);Innovation Fund of Lanzhou Institute of Geology, CAS (Grant No. 2003-19-DJG)

摘　　要：Pyrolysis of lignite in closed systems was conducted at temperatures from 400 to 700℃ and pressure from 1 to 3 GPa in order to investigate the evolutive characteristics of aromatics and the effects of pressure and temperature on the maturation of organic matter under the extreme conditions. The total yield of liquid hydrocarbons decreased with increasing pressure and the aromatics shows more mature with increasing temperature at a given pressure. The data indicate that high pressure significantly suppresses the thermal evolution of geological organic matter especially at lower temperature, but favors the cyclization, polymerization and aromatization of pyrolysate. The pressure effect on maturation of organic matter is nonlinear. Therefore, it can be inferred that sediment organic-matters in the subducted slab could be retained in the deep lithosphere, and the results are also significant for understanding the accumulation and preservation of petroleum in deep reservoirs.Pyrolysis of lignite in closed systems was conducted at temperatures from 400 to 700℃ and pressure from 1 to 3 GPa in order to investigate the evolutive characteristics of aromatics and the effects of pressure and temperature on the maturation of organic matter under the extreme conditions. The total yield of liquid hydrocarbons decreased with increasing pressure and the aromatics shows more mature with increasing temperature at a given pressure. The data indicate that high pressure significantly suppresses the thermal evolution of geological organic matter especially at lower temperature, but favors the cyclization, polymerization and aromatization of pyrolysate. The pressure effect on maturation of organic matter is nonlinear. Therefore, it can be inferred that sediment organic-matters in the subducted slab could be retained in the deep lithosphere, and the results are also significant for understanding the accumulation and preservation of petroleum in deep reservoirs.

关 键 词：HIGH pressure and HIGH temperature  lignite  aromatic hydrocarbon  maturation  isomerzation  petroleum in DEEP reservoirs 

分 类 号：P313.5[天文地球—固体地球物理学]