济阳坳陷二氧化碳气田的成因机制研究

二氧化碳气田是具有很高经济价值的非烃类天然气田，弄清其成因成藏规律，对进行勘探开发及综合利用具有重要的理论和实践意义。通过成因，地质条件扩地成藏的大地构造背景分析对济阳坳陷二氧化碳气田进行较详细研究。根据二氧化碳气田气体组分和碳同位系分析，认为济阳坳陷二氧化碳气的成因为幔源－火山岩浆型。

The Origin of Carbondioxide Gas Fields in Jiyang Basin

The carbondioxide gas fields are a kind of high economic nonhydrocarbon ones. It is very important to research origin of carbondioxide gas fields in theory and practice on exploration and development and utilization. The carbond ioxide gas fields in Jiyang basin are researched in detail on the analysis of origin, geological conditions and tectonic background in this paper. On the basis of gas ingredients and carbon isotopes, the carbondioxide gas in Jiyang basin is from mantle volcanic magma. According to the locations of carbondioxide gas fields, volcanics and faults, the carbondioxide gas fields are closely relative to the Middle and Late Neozoic volcanoes. The NW Shicun fault is the regional transporting path of carbondioxide gas. NE and nearly EW faults control the local reservoir structures. The Tanlu fault zone to the east of Jiyang basin may be the source of mantle magma with carbondioxide gas on the basis of tectonic background.