Authigene Karbonate und CO2-Quellen in Reservoirgesteinen der CO2 Provinz im Niedersächsischen Becken

…我们提出了一个详细的自生矿物的稳定碳和氧同位素研究在泽赫斯坦碳酸盐岩。结合埋藏和温度历史，结果将允许定义它们的碳源和推断成岩（碳酸盐岩形成）过程的反应温度。此外，我们试图将晚（st）（即最年轻）自生碳酸盐矿化与储层中的气体（分子和同位素）组成联系起来。将使用新的分析技术（激光烧蚀制备碳酸盐同位素分析的微尺度样品）和碳酸盐矿物包裹体气体（CO2, CH4）的碳同位素分析。如果在岩石历史中CO2来源的变化是已知的，那么可以使用盆地建模软件来模拟天然气成分和天然气数量。

... We propose a detailed stable carbon- and oxygen isotope study of authigenic minerals in the Zechstein carbonate rocks. In combination with burial and temperature histories, the results will allow to define their carbon source(s) and infer reaction temperatures of diagenetic (carbonate-forming) processes. Moreover, we try to relate the late(st) (i.e. youngest) authigenic carbonate mineralisations to the gas (molecular and isotope) composition in the reservoirs. New analytical techniques (micro-scaled sample preparation for isotope analyses of carbonates by laser ablation) and carbon isotope analyses of gases (CO2, CH4) from inclusions in carbonate minerals will be used. If the variations of the CO2 sources during rock history are known, gas compositions and gas quantities can be modelled using basin modelling software.