RESEARCH ON CLASSIFICATION OF WATER-SOLUBLE GAS IN WEIHE BASIN

ZHANG Xue; LIU Jian-chao; LI Rong-xi; WANG Xing-yun; WENG Kai

2014 Vol. 20, No. 2

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ZHANG Xue, LIU Jian-chao, LI Rong-xi, WANG Xing-yun, WENG Kai. RESEARCH ON CLASSIFICATION OF WATER-SOLUBLE GAS IN WEIHE BASIN[J]. Journal of Geomechanics, 2014, 20(2): 114-122.

Citation:

ZHANG Xue, LIU Jian-chao, LI Rong-xi, WANG Xing-yun, WENG Kai. RESEARCH ON CLASSIFICATION OF WATER-SOLUBLE GAS IN WEIHE BASIN[J]. Journal of Geomechanics, 2014, 20(2): 114-122.

RESEARCH ON CLASSIFICATION OF WATER-SOLUBLE GAS IN WEIHE BASIN

1.
School of Geosciences and Resources, Chang'an University, Xi'an 710054, China
2.
Sanpu Petroleum Engineering Company, Sinopec North China Petroleum Bureau, Xianyang 712000, China

Received Date: 18 October 2013

Publish Date: 25 June 2014

Abstract

Abstract

The reserve of water-soluble gas is rich but the composition and origin is complex in Weihe basin. In order to guide the comprehensive utilization and development in the further, it is necessary for researching the characteristics of water-soluble gas in this area and presenting an appropriate classification scheme for late development. The samples of water-soluble gas are from geothermal wells which in different tectonic units and different completion depths. This research collects the gas through the drainage method and sends the samples to analyze the composition and origin. The methane and helium of water-soluble gas have the most industrial value in the Weihe basin, whose content are maximally about 98.370% and 4.140%. Isotope analysis of carbon indicates that the geneses of the methane are various including inorganic and organic gas from biogas to pyrolysis gas. Isotope analysis of the helium gas from the water-soluble gas shows that it is mainly crust-derived helium. Through summarizing the classification of water-soluble gas and combined with the characteristics of composition, origin and distribution, analogy and contrast, the research shows that the helium gas accumulation layer is located under Zhang Jiapo Formation and suggests that improve former classification scheme and replace formation (Zhang Jiapo Formation) with depth. Finally, the water-soluble gas in the Weihe basin can be divided into two type, they are shallow combustible gas and deep rich helium gas.
- rich helium water-soluble gas /
- combustible water-soluble gas /
- type of water-soluble gas /
- Weihe Basin

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References

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