Diagenetic heterogeneity, pore throats characteristic and their effects on reservoir quality of the Upper Triassic tight sandstones of Yanchang Formation in Ordos Basin, China

摘要

Upper Triassic tight sandstones in Ordos Basin are typical tight oil reservoirs in China. Using a combination of thin sections, SEM, BSE, EDS and mercury injection, 48 sandstone core samples from 17 wells in the study area were collected to investigate the diagenetic heterogeneity, pore-throat characteristics and their correlations with reservoir quality.