NATURAL GAS GEOCHEMISTRY CHARACTERS AND ORIGIN OF LARGE GAS FIELD IN MARINE CARBONATES OF THE SICHUAN BASIN
Received date: 2000-02-14
Online published: 2000-04-20
Natural gas geochemistry characters of large gas field in marine carbonates of the Sichuan Basin has detailedly been expounded in this paper, According to the results of the component of the natural gas, carbon isotopes, light hydrocarbon of condensate and distribution characters of biomarkers, the gas sources of 3 large gas fields in marine carbonates of the Sichuan basin are all foreign instead of in situ. Source rocks of 1 gas fields is above the reservoir, the others are under the reservoir. The gas of Dengying Formation in Wenyuan gas field comes from dark shale of Lower Cambrian Qiongzhusi Formation.Gas source of Jia Lingjiang Formation in Wolonghe gas field should be the underlying coal measures in the Upper Permian Longtan Formation.The gas of Carboniferous in eastern of Sichuan basin chiefly comes from dark shale of Lower Silurian.These characteristics are important significant to exploring the large gas field in the carbonates.
WANG Shunyu; DAI Hongming; WANG Haiqing; HUANG Qingde . NATURAL GAS GEOCHEMISTRY CHARACTERS AND ORIGIN OF LARGE GAS FIELD IN MARINE CARBONATES OF THE SICHUAN BASIN[J]. Natural Gas Geoscience, 2000 , 11(2) : 10 -17 . DOI: 10.11764/j.issn.1672-1926.2000.02.10
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