吐哈盆地台北凹陷油气运聚模式

本文根据生油岩热演化、构造发育、地层沉积等特征，从油气运移和聚集角度分析台北凹陷已发现的油气藏。指出台北凹陷的油气藏以诛罗系为油源，油气运移的最主要通道为断层，其次为裂缝和渗透性砂岩。由于其构造圈闭在燕山运动中期具雏型，只有在此以后的油气运移才有效。提出台北凹陷的运聚模式有巴喀式、丘东－七克台式、胜金口式、鄯勒式。运聚模式不同的油气藏，其油气聚集特点和富集程度不同。

MIGRATION AND ACCUMULATION OF HYDROCARBONS,TAIBEI DEPRESSION,TURPAN-HAMI BASIN

Based on the studies of source rocks, thermal evolution, structure development and sedimentary features, as well as migration and accumulation of hydrocarbons, this paper analysed the petroleum reservoirs found in Taibei depression of the Turpan-Hami basin, and indicated that: (1) the structures in Taibei depression should be initially formed in the middle stage of the Yanshan movement, therefore, the effective migration of hydrocarbons should be happened after the stage; (2) the main source rocks should be occured mainly in the Jurassic; (3) the faults and fractures in the sandstones might be the most important channels for the migration of oil and gas; and (4) four different models of migration and accumulation could be proposed in the depression, i. e. the modles of Baka, Qiou Dong-Qiketai, Shengjinkou and Shame. The four models are different in the features of migration and accumulation, and then the distribution of oil and gas in the depression.