Natural Gas Accumulation by Phased Capture Principle:Taking North-West Area of Qaidam Basin as an Example

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  • 1.Sichuan Province Key Laboratory of Natural Gas Geology,Southwest Petroleum University,Chengdu 610000,China;
    2.School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610000,China

Received date: 2014-09-13

  Revised date: 2015-04-29

  Online published: 2015-10-10

Abstract

The theory of “Phased Capture Principle” is a method to analyse oil and gas accumulation based on the segment process of hydrocarbon generation and accumulation.Inferring the accumulation process from the oil and gas geochemical characteristics in the current traps is the bright spot of this theory,which is fit to area with frequent tectonic activities.Take the North-West area of Qaidam Basin as an example,we confirm the formation time of gas reservoir according to the analysis of carbon isotopes.Different formation time of Nanyishan structure and Kaitelimike structure is the reason that why they accumulated condensate and gas respectively.Kaitelimike structure formed later than the E23 source rock reaching the hydrocarbon generation peak,just captured the later mature stage gas,while,Nanyishan structure captured the product of hydrocarbon generation peak,which always lead to the difference of hydrocarbon characteristic and scale of the two structures.

Cite this article

ZHANG Huan-xu,CHEN Shi-jia,WANG Li,ZOU Xian-li,HUANG You-lin,YAO Yi-tong,ZHAN Pan . Natural Gas Accumulation by Phased Capture Principle:Taking North-West Area of Qaidam Basin as an Example[J]. Natural Gas Geoscience, 2015 , 26(10) : 1901 -1909 . DOI: 10.11764/j.issn.1672-1926.2015.10.1901

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