Measured and calculated horizontal stresses in the Travis Peak Formation

This paper presents the results of an experimental program to determine in-situ horizontal stress magnitudes from the dynamic mechanical properties of tight-gas sand cores. The wells were cored in the Travis Peak formation of east Texas from ~6500 to ~9500 ft deep. Vertical overburden stress gradient was measured in one well using a downhole gravimeter. The core mechanical properties were used with the Anderson and Newberry equations to calculate in-situ horizontal stress. A close match was obtained between measured and calculated horizontal stress values when the dynamic Poisson's ratio from partially gas-saturated samples was used. The assumptions and limitations of the procedure are presented. -from Authors