Determination of in situ stresses and elastic parameters from hydraulic fracturing tests by geomechanics modeling and soft computing

Hydraulic fracturing is the most effective technology for determination of the minimum horizontal in situ stress, σh, in a rock formation. The maximum horizontal in situ stress, σH, is often determined by the minimum horizontal in situ stress, breakdown pressure, Young׳s modulus E and Poisson׳s ratio v with elastic rock behavior assumed. In this paper, a pressure back–analysis method is proposed for determination of these parameters (e.g., σH,...