【摘要】：結(jié)合黃金管熱模擬實驗及模擬產(chǎn)物的輕烴(C_(6-14))定量分析,對不同類型有機質(zhì)熱演化過程中輕烴產(chǎn)率及組成特征進行了對比研究。基于熱解—色譜—質(zhì)譜(PY-GC-MS)方法對模擬產(chǎn)物輕烴定量分析表明,具有較高氫指數(shù)(I_H)的湖相Ⅰ型和海相Ⅱ_1型有機質(zhì)的輕烴產(chǎn)率明顯高于海相Ⅱ_2型有機質(zhì)。松遼盆地白堊系湖相Ⅰ型有機質(zhì)的最大輕烴產(chǎn)率為33.56mg/g_(TOC),張家口地區(qū)下馬嶺組海相Ⅱ_1型有機質(zhì)的最大輕烴產(chǎn)率為39.58mg/g_(TOC),四川盆地二疊系海相Ⅱ_2型有機質(zhì)的最大輕烴產(chǎn)率為10.08mg/g_(TOC)。相對來說,輕烴產(chǎn)物中芳烴相對含量明顯要高于飽和烴。同時,Ⅰ型有機質(zhì)達到最大輕烴產(chǎn)率對應(yīng)的熱解溫度或成熟度要明顯低于Ⅱ_型有機質(zhì)。熱解過程中不同碳數(shù)正構(gòu)烷烴產(chǎn)率的演化結(jié)果表明,低碳數(shù)烷烴達到最大產(chǎn)率時的等效鏡質(zhì)體反射率(Easy%R_O)值普遍高于高碳數(shù)烷烴,這歸因于低碳數(shù)烷烴生成和裂解時的活化能更高。此外,通過熱解過程中輕烴產(chǎn)物組成分析,認為萘含量、苯/正己烷與甲苯/正庚烷等參數(shù)與成熟度具有明顯的相關(guān)性,可用于指示有機質(zhì)熱演化程度。
[Abstract]:Combined with the thermal simulation experiment of gold tube and quantitative analysis of light hydrocarbon (C6-14), the yield and composition of light hydrocarbon during thermal evolution of different types of organic matter were compared and studied. Based on the pyrolysis-chromatography-mass spectrometry (PY-GC-MS) method, the quantitative analysis of simulated light hydrocarbons showed that the light hydrocarbon yields of the lacustrine type 鈪，

本文編號：2135858