Received date: 2005-06-23
Revised date: 2005-08-11
Online published: 2006-12-10
The North-South Pars gas field, which is the largest gas field in the world, is the combination of the North gas field which is located in Qatar and the South Pars gas field in Iran. This paper introduces the geological setting of the North-South Pars gas field and analyses the geochemical characteristics of the gases. The North-South Pars gas field is a part of Qatar arch, and the type of the trap is anticlinal trap. The pay zones are the Permian-Early Triassic Khuff Formation carbonate-evaporites, with the Lower Silurian organic-rich shales and Triassic Dashtak formation sediments made up the source rocks and seals, respectively. Based on the study of the carbon isotopes, we made the conclusion as follows. ① The alkane of this field mainly are oil type gas; ② There are mix of same-type different-origine or same-origine different-period; ③ The source rocks generally contain kerogen type Ⅱ with the maturity between 1.0- 1.5% ; ④ CO2 from this field is organic origin.
Key words： North-South pars gas field; Natural gas; Geochemistry; Gas source
HU An-ping，ZHOU Qing-hua . THE LARGEST GAS FIELD IN THE WORLD——NORTH-SOUTH PARS GAS FIELD[J]. Natural Gas Geoscience, 2006 , 17(6) : 753 -759 . DOI: 10.11764/j.issn.1672-1926.2006.06.753
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