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- Title
Mercury concentration in natural gas and its distribution in the Tarim Basin.
- Authors
Liu, QuanYou
- Abstract
Here I collected natural gas samples from 41 industrial gas wells in the Tarim Basin, and studied the mercury distribution in the area. My data show that there is certain regularity in the distribution of mercury in the Tarim Basin. Generally, the mercury concentration is high at the edge of the basin and low in the central basin. The highest mercury concentration occurs in the Southwest Depression, ranging from 15428.5 to 296763.0 ng/m with an average of 156095.7 ng/m, followed by the Kuqa Depression ranging from 15.0 to 56964.3 ng/m with an average of 11793.7 ng/m, and the Hade oil and gas field in the North Depression has the lowest mercury concentration ranging from 17.7 to 3339.5 ng/m with an average of 1678.6 ng/m. The mercury concentrations in the natural gases of different structural units are various, with the highest mercury concentration in the zone of strong structural activity of Southwest Depression. It is profitable of Hg accumulation in the self sourced and self accumulated gas reservoirs or volcanic existence; in contrast, the low Hg concentration exists in the secondary gas reservoir. The mercury concentration in the natural gas generated under continental depositional environment is higher than that in marine gas. Therefore, the mercury concentration in the natural gases is constrained by gas genesis, depositional environment of source rocks, tectonic activity, and volcanic activity, and the tectonic activity is the main factor for the mercury concentration in the natural gas, followed by volcanic activity and depositional environments.
- Subjects
TARIM Basin (China); MERCURY; NATURAL gas; INDUSTRIAL gases; VOLCANIC activity prediction; GAS fields
- Publication
SCIENCE CHINA Earth Sciences, 2013, Vol 56, Issue 8, p1371
- ISSN
1674-7313
- Publication type
Article
- DOI
10.1007/s11430-013-4609-2