Pyrolysis on Crude Oil and Characteristics of Sha 4 Member Cracking Gas, Dongying Depression
Received date: 2008-11-02
Revised date: 2008-11-28
Online published: 2009-02-10
The crude oil samples of Sha 4 Member in early maturity stage (enclosing the mixture of oil, water and sand in proportion) were heated continuously in an autoclave in Thermal simulation experiments. According to the yields of hydrocarbon cracking gas in 11 simulation temperature points, the accumulative yield of cracking gas is at 650 to 660 cubic meters per ton oil. The yield of cracking gas has two obvious peaks when RO was 1.3% to 1.5% and 2.3% to 2.7%. The amount of methane and the ratio of C2/C3 in cracking gas increase with the simulation temperature, but the ratio of C1/C2 changes little. Carbon isotopes in the cracking gas are relatively light in the mature stage, but become weight in high to over mature stage. At the same time, the differences of carbon isotope between ethane and methane as well as ethane and propane have a growing trend.
Key words： Pyrolysis; Crude oil cracking; Cracking gas; Dongying depression; Sha 4 Member.
GAO Sheng-Jun, CHEN Yi-Cai, LI Yan-Jun, WANG Bo, YIN Chang-He, LI Wen-Tao, YANG . Pyrolysis on Crude Oil and Characteristics of Sha 4 Member Cracking Gas, Dongying Depression[J]. Natural Gas Geoscience, 2009 , 20(1) : 32 -35 . DOI: 10.11764/j.issn.1672-1926.2009.01.32
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