Igneous reservoirs feature in complexities of lithologies and lithofacies and strong heterogeneity.This paper analyzed the petrophysical characters

log responses

and oil-water system of reservoirs with different lithofacies and reservoir types

and proposed a unit division method suitable for reserve calculation of igneous reservoirs.Effective reservoir thickness is recognized through analyzing core

FMI and NMR log data.Models for porosity and saturation interpretation are established through subdivision of reservoir types and integration of conventional log

NMR

and intrusive mercury curve.Parameters of the reserve calculation units are described quantitatively through log-constrained seismic inversion.A comprehensive application of the above-mentioned methods and technologies would solve successfully such issues as difficulties in interpreting reserve parameters of fractured-vuggy igneous reservoirs with dual media and the inaccuracy of reserve calculation.Furthermore

it may help the evaluation of reserve calculation of similar igneous reservoirs.