Fast-Track 2D Seismic Processing While Drilling to Ameliorate Foothills Exploration and Optimize Well Trajectory: An Example from the Central Kurdistan Region of Iraq

Abstract

Complex mechanical stratigraphy and misplaced formation tops often make petroleum exploration of foothills domains extremely challenging. As a consequence, proper seismic imaging, as well as good geological knowledge, are mandatory to optimize a well trajectory that is suited for all the targeted objectives Although the stratigraphy of the Kurdistan Region of Iraq, is relatively simple, the tightening of the structures often leads to the activation of internal mechanical discontinuities and a shift of the main objectives. As a result, as is typically the case in foothills, side-tracked wells have to be carefully planned. In this case study, the first leg of the well demonstrated that the current seismic image was structurally incorrect and would not allow penetration of the deepest objectives. As consequence side-track was planned. A fast-track processing on the closest 2D line was performed to correct the dips of the drilled formations. The output helped optimize the side track trajectory and to drill ahead with better constraints.