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DOI:
:2014,20(2):114-122
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渭河盆地水溶性天然气层类型研究
(1.长安大学地球科学与资源学院, 陕西 西安 710054;2.中国石化集团华北石油局三普石油工程公司, 陕西 咸阳 712000)
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)
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投稿时间:2013-10-18    
中文摘要: 选择位于不同构造单位,不同完井深度的地热水井为载体,利用排水取气法采集水溶气样品,分析其组分特征、平面及纵向分布特征,并进行水溶气类型划分。研究表明,渭河盆地水溶气中最具有工业价值的组分为甲烷和氦,最高含量分为98.37%和4.14%;碳同位素分析结果显示,水溶气中的甲烷成因类型多样,既有无机成因气,也存在有机成因气,有机成因气中从未成熟的生物气到过成熟的裂解气均有所出现;氦同位素分析结果表明水溶气中的氦以壳源氦为主。通过系统研究水溶气的分类方案,结合渭河盆地水溶气成分、成因及分布特点,采用类比、对比等方法,初步判定富氦水溶气的赋存层位,改进前人按深度分类的方案,建议以地层(张家坡组)为界将渭河盆地水溶气分为浅层可燃水溶气和深层富氦水溶气两类。
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.
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引用文本:
张雪,刘建朝,李荣西,王行运,翁凯.渭河盆地水溶性天然气层类型研究[J].地质力学学报,2014,20(2):114-122DOI:
ZHANG Xue,LIU Jian-chao,LI Rong-xi,WANG Xing-yun,WENG Kai.RESEARCH ON CLASSIFICATION OF WATER-SOLUBLE GAS IN WEIHE BASIN[J].,2014,20(2):114-122DOI:

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