Igneous rock oil reservoir distributed in the Carboniferous system of Chepaizi uplift in the Junggar Basin

but its reservoir lithology and petrophysical characteristics is very complex.Firstly

taking method of petrology

lithology identification

core measurement

oil testing

imaging and conventional logging

the pore and fracture characteristics of the igneous rock reservoir were summarized.The total petrophysical property is the matrix porosity

permeability and porosity.The total permeability of the reservoir is contributed by both fracture permeability and matrix permeability

while the permeability of un-fractured reservoir roughly equals matrix permeability.Secondly

using tri-porosity curve regression and FMI effective fracture identification with the constraints from core measurement

a model have been established to calculate the physical parameters of matrix

fracture and bulk reservoir of the igneous rock.Data is compared with core measurements.The model is proved to be reasonable and practical when applied to igneous rock reservoir physical property evaluation in the Chepaizi Uplift.This method can also be used to evaluate other areas.At last

based on the model of reservoir physical parameter

together with analysis on drilling

mud logging and oil testing data

a standard for igneous rock oil reservoir diagnose in the Chepaizi Uplift has been established.