IAH NSW is pleased to announce that our next meeting on Tuesday 14 May 2019 features a talk by Dr Hamid Roshan, Senior Lecturer at the UNSW School of Minerals and Energy Resources Engineering.
Physics-based measurement of formation permeability using widely available downhole logging data
Formation permeability is of fundamental importance in many engineering disciplines such as groundwater, petroleum, civil and construction and others as it predominantly controls the flow of fluids in the sediments. The only reliable technique to measure the formation permeability at the moment is to acquire core from the formation during drilling. Such coring operations are however costly and therefore are often avoided. Thus indirect measurements using downhole logging data have been of interest. Unfortunately the techniques developed so far to estimate the permeability of the formation along the borehole are of empirical nature and therefore cannot be extended beyond their measured laboratory values. Needless to say that significant error has been observed when these empirical correlations were used to fit the values out of their measured range.
In a recent attempt in petroleum industry, Stoneley wave has been used to measure the permeability right at the borehole wall however the operation is quire costly and the obtained results are very sensitive to borehole conditions thus reducing the applicability of the method. We, for the first time, propose to use the resistivity logs and inverse modelling of coupled porous media fluid-ion transport to estimate the permeability of the formation with good accuracy and high vertical resolution. This is the first attempt to estimate the permeability from downhole logging data using direct physics based inverse modelling.
Venue: WSP office Level 27, 680 George Street, Sydney
Date: Tuesday 14 May 2019
Time: 5.30 pm for a 6.00 pm start.
Public access to level 27 is available until 6pm. Late arrivals call Ali for access – 0426254787