Abstract:

The characteristics and influential factors of Halahatang Formation reservoir in Yuqi area，Akekule uplift are studied by means of core inspection，casting thin

section，cathodology，SEM，porosity and permeability analysis，mercury intrusion method etc，hydrocarbon charge and accumulation law are studied with the technologies，such

as fluorescence thin section and fluid inclusion.The results indicate that the main reservoir rock types of Halahatang Formation are finesandstone，medium sandstone

and gravelly sandstone.The accumulative spaces are mainly pores，and the porosity and permeability are high，the factors influencing the reservoir physical property are

sedimentation，compaction，cementation and dissolution.The best reservoirs are located in the area where the Well YQ3，YQ4，LX4 and LX2 are.It is pointed out the faults are

important transporting factors of hydrocarbon accumulation，Yanshanian period is the one of initial construction of hydrocarbon reservoirs，Himalayan period is the one of

final fixation of traps and reconstruction of hydrocarbon reservoirs，structure trap and faulting are an key factors of controlling hydrocarbon distribution and

accumulation.

Key words: reservoir, oil and gas accumulation, Halahatang Formation, Akekule uplift, Tarim Basin