Micro-pore structure and main controlling factors of the paleogene reservoir of the Qiekelike 6 region in south-western Qaidam basin

According to physical property analysis,casting slice and the technology of high pressure Hg injection,the follow-pressure porosity and permeability sensibility,a large number of rock sections,etc.,this paper studied the structural characteristics of the Qiekelike 6 region of the paleogene oil-bearing sandstone reservoir pores and the main factors controlling the pores of evolution.Although the paleogene reservoir pores in this area were assumed to be mainly residual primary pores,the secondary pores were formed by the dissolution that played a more active role for the reservoir permeability.This is mainly determined by the characteristics of the pore throat.An diagenesis showed compaction to be the greatest impact on the original porosity and cementation to be the second influence factor.The dissolution greatly increases the permeability of the reservoir.