Controlling Factors of the Oil and Gas Differential Distributioin the East of Amu-Darya Basin of Northern Afghanistan

WANG Hai-feng，CHEN Huai-long，WANG Wei-bin，YAO Wu-jun，SUN Lin，WANG Zhao-feng，WEN Tao

doi:10.11764/j.issn.1672-1926.2014.06.860

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 6: 860 - 866

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.06.860

Controlling Factors of the Oil and Gas Differential Distributioin the East of Amu-Darya Basin of Northern Afghanistan

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1.Geological Exploration and Development Research Institute,Chuanqing Drilling Engineering Co.Ltd.,
CNPC,Chengdu 610051,China;2.CNPC Services and Engineering Ltd.,Afghanistan,Beijing 100083,China

Received date: 2013-05-22

Revised date: 2013-11-05

Online published: 2014-06-10

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Abstract

In Amu-Darya Basin of Northern Afghanistan,the oil and gas distribution shows significant difference,i.e.,gas pools are located in the north and the oil ones in the south,while in between are the oil pools and gas pools with oil ring.By analyzing the geological elements of oil and gas accumulation,the controlling factors of oil and gas differential distribution are approached.From north to south,trap fill,gas component and reservoir-cap assemblage differ specially.Southward,the trap fill and content of CO₂ decease,while CH₄ increases.Bounded by the Upper Jurassic salt,the reservoir-cap assemblage in the north and south is subsalt Upper Jurassic carbonate and supra-salt Lower Cretaceous clastic ones,respectively,and in-between both assemblages develop.The distribution range of gypsum and salt is the key factor controlling the differential distribution of oil and gas.Then the corresponding mode is established and the exploration targets in the research area are evaluated,which indicate that in the north of the research area where salt exists the Upper Jurassic gas pools are the targets,while in the south where anhydrite is absent the oil pools should be focused,and in between both Upper Jurassic gas pools and Lower Cretaceous oil pools and gas pools are the potential targets.

Key words： North Afghanistan; Amu-Darya Basin; Oil and gas differential distribution

Cite this article

WANG Hai-feng，CHEN Huai-long，WANG Wei-bin，YAO Wu-jun，SUN Lin，WANG Zhao-feng，WEN Tao . Controlling Factors of the Oil and Gas Differential Distributioin the East of Amu-Darya Basin of Northern Afghanistan[J]. Natural Gas Geoscience, 2014 , 25(6) : 860 -866 . DOI: 10.11764/j.issn.1672-1926.2014.06.860

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