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本文论述了用四川盆地侏罗纪原油,在350～600℃温度模拟实验条件下,热变成气规律以及不同温度下形成气体的组份特征。进一步验证了埋藏在储集层中的原油随着温度而演化,最后生成甲烷这一事实。同时测出一定原油量与受热演化生气量的关系。当实验温度为600℃时,原油全部热解成甲烷、氢气和残碳。实测结果,在该温度,1吨原油可演化成600米~3左右纯甲烷和100米~3氢气,认为该参数对于过成熟地区,计算生气量具有一定意义。
In this paper, the composition of gas from the Jurassic crude oil in Sichuan Basin under the simulated temperature of 350-600 ℃, the law of gas evolution into gas and the formation of gases at different temperatures are discussed. Further verified the fact that the crude oil buried in the reservoir evolved with temperature and finally formed methane. At the same time, the relationship between the amount of crude oil and the amount of thermal evolution was measured. When the experimental temperature is 600 ℃, the crude oil is totally pyrolyzed into methane, hydrogen and residual carbon. The results show that at this temperature, 1 ton of crude oil can evolve to about 600 ~ 3 pure methane and 100 ~ 3 hydrogen, which is considered to be of some significance for the calculation of gas production in over-mature areas.