塔里木盆地满加尔油气系统下古生界油源油中蜡质烃来源的成因分析

部分从满加尔坳陷生成的油具有中-高蜡含量。据油的蜡含量的分布、细菌和藻类中生物标志物的分析以及模拟实验的结果，认为来自满加尔坳陷南北隆起带上下古生代的油中的高蜡含量主要和该下古生代中的藻类、蓝绿藻和细菌有关。丰富的来自蓝绿藻和细菌的长链类异戊二烯烷烃（ｉＣ２１～ｉＣ４５）和藿烷类在油和抽提物中也被发现了。在近代浮游生物蓝绿藻的热解产物中也存在高碳数的正构烷烃。丰富的蜡质烃也可能是由于运移过程地质色层效应引起的。

Genetic Analysis of the Origin of the Lower Paleozoic Waxy Hydrocarbon from the Manjiar Oi}Gas System,Tarim Basin

Part of oils generated from the M anjiar depression has medium to high wax content. Based on thedistribution of the wax content of oils, analysis of biomakers in bacteria and algae and the results of sim-ulation experiments, it was considered that the high wax content in the oils from the Lower Paleozoic ofthe both south and north uplifts in the Manjiar depression is chiefly related to algae,due green algae andbacteria which aenthe main organic origin in the Lower Paleozoic·of the tended isoprenoids and hopanoids originated from blue green algae and bacteria were fornd in tracts and oils. Extendedn alkanes also existed in the pyrolytic products of recent plankton blue green algae. Abundance ofwaxy n}-akanes could also be caused by the geochromatographic effects during migration.