Organic Matter Loss during the Acidolysis of Hydrocarbon Source Rock
Received date: 2009-05-12
Revised date: 2009-07-08
Online published: 2009-12-10
When acidolysis is used to analyze organic carbon in source rock, some organic matter will often be missed.Aiming at this problem, we used the regular process to obtain the acidolysis liquid and added NaCl to make it supersaturated, and then extracted and got soluble organic matter with about 10% organic carbon.The further research indicates that the main content is the compounds of organic acid (or salt), including short-chain fatty acids, 4-hydroxyl fatty acids, aromatic acids and aromatic anhydride.As the high-quality parent materials for gas generation, they can produce at least 40ml methane in per 100 gram of rock samples.Thus, for hydrocarbon source rock with considerable carbonates, the analyzing process of organic carbon should add the step of extracting organic carbon from acidolysis liquid.
Key words： Organic acid; Acidolysis; Missing organic matter; Organic carbon
LEI Tian-zhu,XIA Yan-qing,QIU Jun-li,JIN Ming,MENG Qian-xiang,FANG Lin-hao . Organic Matter Loss during the Acidolysis of Hydrocarbon Source Rock[J]. Natural Gas Geoscience, 2009 , 20(6) : 957 -960 . DOI: 10.11764/j.issn.1672-1926.2009.06.957
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