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- Title
Geochemical characteristics and exploration prospect of low mature coal-derived gas in Qiongdongnan Basin.
- Authors
Gang LIANG; Jun GAN; Jun-jun YOU; Xing LI; Ming-zhu LEI
- Abstract
In recent years, the carbon isotope of natural gas from Y8 and other gas fields in Qiongdongnan Basin is relatively low, which is quite different from the mature & high mature coal-derived gas discovered in the past. After in-depth investigation of the concept of low mature gas and detailed geochemical analysis, it is considered that δ13C1 is distributed between -47‰ and -42‰, δ13C2 is distributed between -28‰ and -25‰, which is similar to the low mature coal-derived gas in Turpan-Hami Basin, and the maturity of natural gas RO is between 0.5% and 0.8%, which mainly comes from the source rocks with low maturity of the Yacheng Formation distributing in the depression slope and the uplift, and the Miocene source rocks developed in the basin with large-scale. The discovery of low mature coal-derived gas has greatly expanded the research scope of source rock in Qiongdongnan Basin and provided a new research idea for future exploration in the basin.
- Subjects
PROSPECTING; NATURAL gas; GAS fields; CARBON isotopes; ANALYTICAL geochemistry; COAL combustion
- Publication
Natural Gas Geoscience, 2020, Vol 31, Issue 7, p1
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2020.02.006