原油模拟生物降解的饱和烃色谱分析

生物降解对原油的影响是至关重要的。通过喜氧细菌对原油进行生物降解模拟实验,以及对模拟产物的饱和烃色谱分析研究,发现原油中的正构烷烃首先被降解,Pr/C₁₇和 Ph/C₁₈比值逐渐变大,而OEP值和 Pr/Ph比值基本不变。当类异戊二烯烷烃(Pr,Ph)发生降解时,Pr/C₁₇和Ph/C₁₈比值反而降低,Pr/Ph和OEP值已无法测定或可能是不真实的。原油遭受生物降解后,饱和烃色谱参数产生变化。原油的油质越轻,生物降解的速度越快。

GAS CHROMATOGRAPHIC ANALYSIS OF SIMULATED BIODEGRADED SATURATED HYDROCARBON

For crude oil, the influence of biodegradation is very important. Biodegradation of crude oil was simulated by aerophile bacteria, and the saturated hydrocarbon of the products was aralyzed by GC. It was shown that the n-alkanes would be biodegraded first, and the value of Pr/C_(17) and Ph/C_(18) would be increased, but the value of OEP and Pr/Ph would be kept no changes. When the isoprenoids (Pr, Ph) began to be biodegraded, the value of Pr/C_(17) and Ph/C_(18) would be reduced, and the value of Pr/Ph and OEP could not be measured or they were not the true value. After crude oil has been biodegraded, the parameters of saturated hydrocarbon in GC analysis should be changed. Lighter the crude oil is, faster will it be biodegraded.