Steam drive pilot test in Block Qi40 has achieved ideal development result, but the sweep efficiency is low and stable production period is short because of reservoir heterogeneity.
Basing on detailed test data of the Damingtun depression, the main charging pathway of two petroleum system is reconstructed by means of hydrocarbon compositional heterogeneity.
A model of real microscopic sandstone real is used to conduct a water drive displacement test, study the effect of pore structural heterogeneity on residual oil distribution.