Genetic Origin of Natural Gas and Its Filling Historyin Dinan Uplift-Wucaiwan of Junggar Basin

ZHAO Meng-Jun, WANG  Xu-Long, DA  Jiang, XIANG  Bao-Li, SONG  Yan, QIN  Sheng-Fei

doi:10.11764/j.issn.1672-1926.2011.04.595

Natural Gas Geoscience >

2011 , Vol. 22 >Issue 4: 595 - 601

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.04.595

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Genetic Origin of Natural Gas and Its Filling Historyin Dinan Uplift-Wucaiwan of Junggar Basin

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1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;
2.State Key Laboratory of Enhanced Oil Recovery,Beijing 100083,China;
3.Basin Structure and Accumulation Laboratory,CNPC,Beijng 100083,China;
4.Research Institute of Petroleum Exploration and Development,Xinjiang Oil Field Company, Kelamayi 841000,China

Received date: 2011-03-31

Revised date: 2011-07-15

Online published: 2011-08-10

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Abstract

Generally,the time of natural gas accumulation is late.But the filling history of the Carboniferous natural gas in the Dinan uplift\|Wucaiwan of Junggar basin gives a special sample.Natural gas has low dryness coefficient of 0.92 and N₂ content of 3.04%,but the δ¹³C₁value of -32.12‰ indicates that natural gas would be at the highly mature stage.By means of genetic origin of natural gas and recovery of filling history,we consider that natural gas was formed at early stage but accumulate at late stage in the Dinan uplift\|Wucaiwan of Junggar basin.There are three stages of gas accumulation,including late Hercynian,late Indo\|Chinese and middle Yanshan,but the Yanshan is the main stage of gas accumulation.At Yanshan Era,natural gas was derived from the Carboniferous source rock with thermal maturity of 0.8％-1.2％RO,causing methane enriched in ¹³C.

Key words： Natural gas component; Carbon isotope; Genetic origin; Filling history; Junggar basin.

Cite this article

ZHAO Meng-Jun, WANG Xu-Long, DA Jiang, XIANG Bao-Li, SONG Yan, QIN Sheng-Fei . Genetic Origin of Natural Gas and Its Filling Historyin Dinan Uplift-Wucaiwan of Junggar Basin[J]. Natural Gas Geoscience, 2011 , 22(4) : 595 -601 . DOI: 10.11764/j.issn.1672-1926.2011.04.595

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