There exist notable differences in physical property of oil layer in the three Pubei faults, andserious interformational, intraformational and areal heterogeneity, and unequal flooding in differentoil layers.

Analysis on Depressurizing Exploitation in Qian-3 Member North Fault Block of Wangchang Oilfield at High Water-cut Stage

From the lubrication and aimed at the moving features of reciprocating slider and combined with tribology, a trigonal slider is designed by author and the equation of oil film thickness and oil film pressure are given based on the calculation.

Temporal Change of Flow Distribution in River Network of the Delta of West River and North River;