吐哈盆地鲁克沁构造带稠油成藏机理

鲁克沁构造带稠油藏属于吐哈盆地前侏罗系稠油分布区．研究表明，其油源为台北凹陷二叠系，中高孔、渗的中上三叠统为其提供了良好的储层条件．鲁克沁构造带三叠系油藏烃类注入至少有两期，早期为晚三叠世-早侏罗世，晚期是晚白垩世，并以早期注入为主．稠油成藏则由多因素综合作用造成，由于早期源岩成熟度较低，原油本身较稠，而油气运移过程中轻质组分散失、生物降解和盆地抬升剥蚀阶段大气水下渗所导致的水洗氧化等作用则使其进一步稠化．

Formation mechanism of heavy oil reservoirs in Lukeqin structure belt. the Turpan-Hami basin

The heavy oil reservoirs of gukeqin structure beh are in distribution areas of pre-Jurassic heavy oil reservoirs which is discovered in the Turpan-Hami basin. Researches show the oil source is Permian system of the Turpan-Hami basin, the higher pore and higher permeability stratum of mid and upper Triassic provide it with the nicer reservoirs. The formation of Lukeqin structure belts oil reservoirs have two periods at least; the first is Late Triassic to Lias which is important period for petroleum migration and accumulation, and the latter is Late Cretaceous period. The thickening may be synthetically aroused by many factors, because of the lower maturation of source rock at forepart, the rock tar is thicker, and then many other factors impel it, which include the hydrocarbon dissipation at the process of oil and gas migration, biodegradation and bathing-oxidation induced by gravity-induced centripetal flow recharged by meteoric water at the basin uplift period and etc.