Discovery and Geological Significance of Natural Sulfur-bearing Aqueous Inclusions in the Maoba Gas Reservoir, NE-Sichuan, China

详细信息   

• 责任者：Li Baohua (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Gu Xuexiang
• 刊名：Acta Mineralogica Sinica
• 出版年：2011
• 卷期：31(3)
• 关键词：气藏 ; gas reservoirs ; 硫 ; sulfur ; 流体包裹体 ; fluid inclusions ; 四川 ; Sichuan Province
• 页码：p.541-549
• 图表：4 illus., 3 tables, 22 refs.
• 分类号：1003
• 出版序号：633
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

摘要

 
    

Based on the petrographic observation, homogenization temperature and salinity determination and Laser Raman analysis of fluid inclusions, various types of fluid inclusions are recognized in the Maoba gas reservoir rocks, including gas-liquid H₂O inclusions, hydrocarbon-H₂O inclusions, gas-phase hydrocarbon inclusions, asphalt inclusions and natural sulfur-bearing gas-liquid H₂O inclusions. The homogenization temperatures of gas-liquid H₂O inclusions at the late diagenetic stage range from 104 ℃ to 206 ℃, and salinities vary between 4.03% and 19.29% NaCl. Temperatures and salinities are negatively correlated to a certain extent. The temperature of pore water in reservoir rocks increased with increasing buried depth in diagenetic environment, resulting in the thermochemical sulfate reduction between hydrocarbons and SO₄^2-, the generation of H₂S and H₂O, and the decrease in fluid salinity.