Rock compressibility is one of the most important properties in petroleum exploration and production. It is an essential parameter in drilling and completion design. Knowledge of geomechanical properties of target reservoirs ensures producing hydrocarbons from unconventional resources safely, environmental friendly, and economically. Because the direct measurement of rock compressibility is time consuming and cost expensive. Indirect measurement of rock compressibility from other readily available experimental data, such as permeability and sonic velocity tests, is highly demanded. Rock compressibility from other aspects not only is a good reference for the directly measured rock compressibility, but also is an important supplement in case that no direct measurement is available or experimental data are unreliable due to lab and human errors, irregular core plug, and/or non-uniform deformation.
In this study we developed a method to determine the rock compressibility using permeability experimental data. The significance of this investigation is that the new approach has a solid theoretical base. With this the core analysis can be reliable and accurate. The combination of the proposed method with direct measurement can be employed to ensure the reliability of the experiment and quantify the uncertainty resulting from lab and human errors.