... coefficients required in the LM algorithm are efficiently computed by using the adjoint method. We also show maps of sensitivity coefficients of packer interval and observation probe pressures with respect to parameter distributions (e.g., horizontal/vertical permeabilities and porosities) that offer important...

... production and interference tests along an openhole. It also permits flexible configuration. In this paper, we describe a three-probe configuration that consists of a sink, a diametrically opposite horizontal observation probe, and one vertically displaced observation probe. Pressure measurements from two...