沉积学报2012，Vol.30Issue(6)：1172-1179,8.
烃源岩过成熟阶段生气潜力的实验室模拟
The Simulation Experiment on Gas-generating Potential of Over Mature Source Rocks
王东良 1张英 1卢双舫 2国建英 1李志生 1莫午零 1王民 2王义凤1
作者信息
- 1. 中国石油勘探开发研究院廊坊分院,河北廊坊065007／中国石油天然气集团公司天然气成藏与开发重点实验室,河北廊坊065007
- 2. 东北石油大学,黑龙江大庆163318
- 折叠
摘要
Abstract
As for the gas-generating potential at the over-mature stage, the authors used the Rock-Eval rock pyrolog- get and TG-MS high-temperature pyrogenating simulated experiment device to carry out a series of experiment and re- search. By using the coal and carbonaceous mudstone of Jurassic in Junggar Basin and outcrop coal sample of the Per- mian system and Carboniferous carbonaceous mudstone in Ordos Basin, we carried out the gas-generating simulation experiment and the temperature is from 300℃ to 800℃. According to the result, all the rocks have generated a lot of gas when the temperature is lower than 600℃ (that is Ro 〈 2.0% -2.5 % ). When increasing the experiment temper- ature from 600℃ to 800℃, which means to raise Ro from 2.0% ~2.5% to 5.0%, we found that both the coal andthe carbonaceous mudstone in the two Basin can generate a great amount of natural gas between 600 - 800℃. The gas generated from the carboniferous carbonaceous mudstone accounts for 25.38%, 34.39%. The gas generated from the two type source rocks at the over-mature stage accounts for 20% ~ 35% of the total generated gas volume. In an attempt to verify the above phenomenon, we have cooperated with Taiyuan Institute of Coal Chemistry Chi- nese Academy of Sciences to carry out the source rock thermogravimetric-mass-spectrometric thermal simulated experi- ment and have got very similar result. According to the result of thermogravimetric-mass-spectrometric experiment on the shale of sea facies and the mud stone of lake facies, the two samples of Songliao Basin, the organic matter of I12 residue gas-generating when the temperature is between 600 ~ 800℃ accounts for 7% of the total generated gas vol- ume or so and the organic matters of 111 organic matter accounts for 5%. However, the gas-generating volume is much smaller than the coal-related source rock. There is a tendency in which the type of organic matter is worsening and the residue gas volume is reducing at high temperature, which is similar to that experiment result on the above- mentioned pyrogenating gas generation rate. When the temperature is between 800 ~ 1000℃, the gas-generating po- tential disappears, which is consistent with the experiment result of coal-related source rock. Therefore, a large amount of natural gas can be generated at the over-mature stage(Ro≥ 2.5 )for coal and carbo- naceous mudstone, and the volume can account for 20%, or even more. The low limit of Ro extend to 5.0% . The generated gas volume stops increasing when the temperature is larger than 800℃, so the simulation temperature 800℃ will be enough for the gas-generation reflection.关键词
烃源岩/过成熟/生气潜力/模拟实验Key words
source rock/over-mature/gas-generating potential/simulation experiment分类
天文与地球科学引用本文复制引用
王东良,张英,卢双舫,国建英,李志生,莫午零,王民,王义凤..烃源岩过成熟阶段生气潜力的实验室模拟[J].沉积学报,2012,30(6):1172-1179,8.
