HU Guo yi, LI Zhi sheng, LUO Xia, LI Jian JIANG, Zhu sheng, WANG Chun yi. The Comparision of Gas Generation Potential and Model between Two Different Thermal Simulation Systems[J]. Acta Sedimentologica Sinica, 2004, 22(4): 718-723.
| Citation:
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HU Guo yi, LI Zhi sheng, LUO Xia, LI Jian JIANG, Zhu sheng, WANG Chun yi. The Comparision of Gas Generation Potential and Model between Two Different Thermal Simulation Systems[J]. Acta Sedimentologica Sinica, 2004, 22(4): 718-723.
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The Comparision of Gas Generation Potential and Model between Two Different Thermal Simulation Systems
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Langfang Branch of Petroleum Exploration and Development Research Institute, PetroChina, Langfang, Hebei 065007
- Received Date: 2003-12-04
- Rev Recd Date:
2004-02-24
- Publish Date:
2004-12-10
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Abstract
The gas potential and generation model of type Ⅰ,Ⅱ 1,Ⅱ 2 and Ⅲ organic matter in the open system have been studied. The thermal simulations with type Ⅱ 1 organic matter in the open and closed pyrolysis systems have been carried out and gas generation potential and model have been compared in the two kinds of systems. In the open system the gas potential from type Ⅰ is the highest and its potential is about 269.6 l/g·C org . The gas potential from type Ⅲ is the lowest and its potential is only 26.3 l/g · C org . The gas potential from type Ⅱ 1 in the closed system is more than that in the open system. In the closed system the gas potential is up to 371.2 l/g·C org ., which is about 4.4 times higher than that in the open system. This means that the cracking mechanisms are not different in these two kinds of pyrolysis systems. In the open system, the gas is mainly generated from kerogen by primary cracking, but in the closed system it is generated from kerogen and liquid hydrocarbon by primary and secondary cracking. The gas generation model from type Ⅱ 1 is different in this two kinds of cracking process. The main evolution stage of gas generation by primary cracking (from kerogen) is from R o(%)=1.0 to 1.5 and that by secondary cracking (from liquid hydrocarbon) is from R o(%)=1.5 to 2.5.
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