A Seal Jar for Desorbing Physical-Adsorption Hydrocarbons and Its Application Effect

WANG Guo-jian，TANG Yu-ping，CHEN Wei-jun，CHENG Tong-jin，HUANG Chen-jun，TANG Jun-hong

doi:10.11764/j.issn.1672-1926.2013.04.768

Natural Gas Geoscience >

2013 , Vol. 24 >Issue 4: 768 - 773

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.04.768

A Seal Jar for Desorbing Physical-Adsorption Hydrocarbons and Its Application Effect

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1.Wuxi Research Institute of Petroleum Geology,Research Institute of Petroleum Explorationand Production,SINOPEC,Wuxi 214151,China;
2.College of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310018,China

Received date: 2012-11-14

Revised date: 2012-12-19

Online published: 2013-08-10

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Abstract

Light hydrocarbons in an underground hydrocarbon reservoir can arrive to the surface in a trace yet detectable amount through near-vertical microseepage,some of which may exist in a physical adsorption state,making physical adsorption light hydrocarbons one of the most direct geochemical indicators in reflecting the present hydrocarbon accumulations.Therefore,physical adsorption hydrocarbon has been widely used in oil and gas geochemical exploration.The headspace gas and the physical adsorption gas techniques have long been used to extract this phase of hydrocarbons,but some technical faults have also been found.A new seal jar for desorbing physical adsorption hydrocarbons has been developed recently,which allows the soil samples treated in a fully sealed state,desorbing the samples by the negative pressure caused by piston movement,and drawing the gas into a positive condition,resulting in a sufficient extraction of the physical adsorption hydrocarbons.The jar,small in volume,easy to operate and portable,is appropriate for analyzing the large amount of samples.Its application in Linnan oilfield in Jiyang depression has shown that the concentration of the hydrocarbons extracted in this way is far higher than that extracted by the traditional method,and the full components of C₁-C₅ show distinct distribution between the microseepage areas and the background areas.The results proved that it can provide an effective geochemical indicator for oil and gas exploration,and has bright application prospect.

Key words： Physical adsorption hydrocarbon; Desorption; Sealed jar; Geochemical exploration; Fully extraction; Application prospect

Cite this article

WANG Guo-jian，TANG Yu-ping，CHEN Wei-jun，CHENG Tong-jin，HUANG Chen-jun，TANG Jun-hong . A Seal Jar for Desorbing Physical-Adsorption Hydrocarbons and Its Application Effect[J]. Natural Gas Geoscience, 2013 , 24(4) : 768 -773 . DOI: 10.11764/j.issn.1672-1926.2013.04.768

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