The drilling result shows the distribution and quality of Lower-Middle Ordovician carbonate reservoirs overlaid by Upper Ordovician in the south of Tahe Oilfield are mainly controlled by faults and fractures,with structural open fractures predominantly,drilling-induced fractures secondly.

Water saturation evaluation of low resistivity reservoir in southern Tahe Oilfield;

In the paper,the hydrocarbon migration vestige of Donghetang formation in the south-west of Tahe oilfield is studied systematically by analyzing oiliness cores and slices and using Microscope infrared spectroscopy(Micro-FTIR) technique,which was used to this study for the first time.