American Rock Mechanics Association
June 28, 2015

Knowledge of Biot poroelastic coefficient is crucial to geoscientists for a number of applications, including oil and gas exploration and production, and hydrogeology. This in turn requires estimation of bulk and grain modulus or compressibility.  Although bulk modulus estimation is a standard laboratory method for shale, no effort was made till date to directly measure grain compressibility in the laboratory. This paper presents a laboratory study to fill this gap. The experimental program described here starts with validation of the technique using aluminum sample. Following this, one Berea sandstone and one shale sample was tested. Finally, using the measured data, Biot coefficient was estimated for shale. General agreement with published literature was observed. However, since none of the reported data was obtained through laboratory measurement, further measurements need be performed for shale and other reservoir rocks.

Authors: Abhijit Mitra, Munir Aldin, Sudarshan Govindarajan, Meghana PaiAngle