Research Progress of Source Rocks and Formationof Low Evolution Oil and Gas in Turpan-Hami Basin
Received date: 2008-10-10
Revised date: 2008-11-06
Online published: 2008-12-10
Geochemical studies were carried out on the saturated and aromatic hydrocarbon fraction of six source rocks collected from the Middle to Lower Jurassic of Turpan Hami basin. In the study, we proved some views proposed by the predecessors (1. the organic matter input is mainly higher plants; 2. the organic matter types of source rock are mainly type Ⅲ; 3. the source rocks evolution degree is low). At the same time, some new significant findings were revealed (for instance, the Turpan Hami Basin source rock samples have a high abundance of resin compounds, the organic matter in source rocks suffered a significant biodegradation, and 8S (sulfur) ring substance is also found in the samples). These substances and the geological action will ultimately lead the activation energy to be greatly reduced, which make it easily to form oil and gas at the lower stage of thermal evolution. The research indicates that the thermal evolution degree of organic matter is less than 0.8% (RO), and the resulting oil and gas are categorized as immature oil and low mature gas, respectively. These findings may have important significance to understand the mechanism of oil and gas formation and accumulation，especially for the low-mature gas.
Key words： Source rock; Element sulfur; Low-ature gas; Research progress; Turpan-Hami basin.
Wang Zuo-dong,; TAO Ming-xin ;MENG Qian-xiang ; LI Zhong-ping ;WANG Xiao-feng ;WANG Zhi-yong ;DU Hong-yu . Research Progress of Source Rocks and Formationof Low Evolution Oil and Gas in Turpan-Hami Basin[J]. Natural Gas Geoscience, 2008 , 19(06) : 754 -760 . DOI: 10.11764/j.issn.1672-1926.2008.06.754
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