地质学报（英文版）2008，Vol.82Issue(3)：537-542,6.
Kinetic Modeling the Formation of Low-mature Gases and Analysis of the Possibility to Be Accumulated
Kinetic Modeling the Formation of Low-mature Gases and Analysis of the Possibility to Be Accumulated
摘要
Abstract
At present, shallow gases have received much attention due to low cost in exploration and production. Low-mature gases, as one significant origin to shallow gas, turns to be an important research topic. The present understanding of low-mature gases is confined within some geological cases, and few laboratory studies have been reported. Therefore, the potential and characters of lowmature gases are not clear up to now. Here, two premature samples (one coal and the other shale) were pyrolyzed in a gold confined system. The gaseous components including hydrocarbon gases and non-hydrocarbon gases were analyzed. Based on kinetic modeling, the formation of low-mature gases was modeled. The results showed that during low mature stage, about 178 mL/gTOC gas was generated from the shale and 100 mL/gTOC from the coal. Two third to three fourth of the generated gases are non-hydrocarbon gases such as H2S and CO2. The total yields of C:_s for the two samples are almost the same, 30--40 mL/gTOC, but individual gaseous hydrocarbon is different. The shale has much lower C1 but higher C2-5, whereas the coal has higher C1 but lower C2-5. Hydrocarbon gases formed during low-mature stage are very wet. The stable carbon isotope ratios of methane range from -40‰ to -50‰ (PDB), in good consistence with empiric criterion for low-mature gases summed up by the previous researchers. The generation characters suggest that the low-mature gases could be accumulated to form an economic gas reservoir, but most of them occur only as associated gases.关键词
low-mature gases, kinetic modeling, carbon isotope ratio of methane, potential of C1-5Key words
low-mature gases, kinetic modeling, carbon isotope ratio of methane, potential of C1-5分类
天文与地球科学引用本文复制引用
SHUAI Yanhua,WANG Hui,ZHANG Shuichang,SU Aiguo..Kinetic Modeling the Formation of Low-mature Gases and Analysis of the Possibility to Be Accumulated[J].地质学报（英文版）,2008,82(3):537-542,6.基金项目
This work was jointly supported by the CNPC Project(Grant No. 06-01C-01-04) and National Natural Science Foundation of China (Grant No. 40603014). （Grant No. 06-01C-01-04）
