In this study, porosity and permeability measurements as well as petrographic examination of three sandstone reservoir samples (Fife and Locharbriggs sandstones both from southwest Scotland and Slick Rock Aeolian sandstone from Utah, United States) were used to evaluate the effect of mineralogy on permeability. The choice of three different types of sandstones that differ in grain size, porosity, and mineralogy will show that variations in the porous microstructure can be linked to the flow behavior of single fluids. These three groups of samples have undergone a wide range of detailed petrographical characterization. The results of the different methods used were found to be consistent with each other, and the combination of a variety of methods has allowed a full characterization of the rock and its impact on fluid flow. A positive correlation between liquid permeability and the volume fraction of silica (SiO2) is clearly demonstrated. Liquid permeability also increases with increasing mean grain size and porosity, and decreasing percentages of clay and cement. Liquid permeability was correlated using multi-variate regressions to one to five petrographical parameters, the results of which have useful application in the estimation of reservoir permeability where samples are not available for experimental testing.
|Title of host publication||Petroleum Science Research Progress|
|Publisher||Nova Science Publishers, Inc.|
|Number of pages||23|
|Publication status||Published - 1 Dec 2008|
- Laboratory study