Controlled by regional "seesaw" tectonic movements and the fault carrier system

the Triassic of the Tahe area experienced a very complicated hydrocarbon accumulation process.In this study

we systematically analyzed 291 fluid inclusion samples.The hydrocarbon charging events and timing of accumulation in the Triassic were determined according to the fluorescent colors of oil inclusions and through projecting the homogenization temperature on burial history.The results show that

each of the upper

middle and lower oil layers in the Triassic were charged in three stages.The reservoirs in the northern Yuqi area were charged in the earlier(40-7.5 Ma) three discontinuous stages

while the reservoirs in the central-south area were charged in the later(11-0.9 Ma) three continuous stages.Based on these understandings

we have proposed that the peri-salt and supra-salt structural zones and lithological updip pinchout zones are the favorable targets for further exploration.