Standard Digital rock physics has been extensively used to compute rock physical parameters. Digital images are not widely available and often come with an excessive cost and expensive computation. Alternative DRP methods, however, benefit from the highly available low-cost 2D thin-section images and require a small amount of computer memory usage and CPU. We introduce another alternative DRP method to compute 3D elastic parameters based on differential effective medium (DEM) theory. We aim to capture the pore aspect ratio distribution from 2D images. This distribution is, then, used to estimate 3D elastic moduli of sample by DEM equations. Moreover, a stochastic porous media reconstruction method was also used to generate more scenarios of rock structure and those of which that are not seen in 2D images. Results from Berea sandstone and Grosmont carbonate showed that using only 2D images our proposed method could effectively estimate 3D elastic moduli of rock samples.