Accumulation Conditions of Natural Gas and Exploration Domains in Pingtai Area,Piedmont Zone of the North Qaidam

TIAN Ji-xian，SUN Ping，ZHANG-Lin，GUO Ze-qing，ZHAI Zhi-wei，ZHOU Fei，ZHAO Jian

doi:10.11764/j.issn.1672-1926.2014.04.526

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 4: 526 - 531

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.04.526

Accumulation Conditions of Natural Gas and Exploration Domains in Pingtai Area,Piedmont Zone of the North Qaidam

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1.China University of Geoscience (Beijing),Beijing,100083,China;
2.Langfang Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Langfang 065007,China;
3.Exploration and Development Research Institute of Qinghai Oilfield Company,PetroChina,Dunhuang 736200,China

Received date: 2013-05-16

Revised date: 2013-06-30

Online published: 2014-04-10

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Abstract

Pingtai area,which is located in the Qilian Mountains,is an ancient uplift for long-term and next to the Saishiteng Depression.In this paper,we discuss the accumulation conditions of oil and gas in the Pingtai area in combination with source rocks,reservoir-cap rock assemblages,trap,and migration pathway.Results show that the oil and gas accumulation in the Pingtai salient was happened outside of source rocks,oil and gas generated from the Jurassic source rocks in the Saishiteng Depression was migrated and gathered into the Tertiary sandstone reservoirs though faults and unconformity,those reservoirs always have background of ancient uplift.The exploration breakout of Ping 1 well confirmed that the ancient uplift and accumulation outside sources have good exploration potential in the piedmont zone of the Northern Margin and is main exploration direction in the Qaidam Basin.

Key words： Accumulation outside sources; Ancient uplift; Pingtai areas; The north Qaidam piedmont zone

Cite this article

TIAN Ji-xian，SUN Ping，ZHANG-Lin，GUO Ze-qing，ZHAI Zhi-wei，ZHOU Fei，ZHAO Jian . Accumulation Conditions of Natural Gas and Exploration Domains in Pingtai Area,Piedmont Zone of the North Qaidam[J]. Natural Gas Geoscience, 2014 , 25(4) : 526 -531 . DOI: 10.11764/j.issn.1672-1926.2014.04.526

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