Study on Petrophysical Parameters Testing Technology for Loose Rock

Abstract

Petrophysical parameters are not only concerned with grain size, but also with the cementation degree. Therefore, it is difficult to determine the petrophysical parameters for the loose core using traditional testing technique. This paper discussed the influence of freeze-sampled loose rock on the test result of rock porosity and permeability. In view of the grains scattering problem in oil-bearing loose rock samples caused by sample deoil, the calibration method for rock permeability and porosity is proposed in this paper through the comparison of testing methods. The test result indicates that the method of measuring the rock permeability of the oil-bearing samples followed by measuring the rock porosity of the deoiled samples is effective. This method can meet the requirements during sample deoiling, drying and petrophysical parameters testing, decrease the influence of freeze-sampling technique on the test of petrophysical parameters, resolve the difficult problem of testing petrophysical parameters using the same sample, and improve the authenticity and reliability of the analyzing result.