Acquisition aperture correction in angle-domain towards the true-reflection RTM

Summary Due to the limitation of acquisition aperture, RTM, though as a true-amplitude propagator, cannot provide a truereflection image. To relate the image amplitude with the target reflectivity, we propose an amplitude correction in the dip angle domain for RTM. The stacked migration image is decomposed into dip-angle dependent partial images, which are compensated individually by the corresponding acquisition dip response (ADR). Then, corrected images are summed up to form a new image consistent with the target impedance contrast. ADR is formulated as the energy contributed from all possible combinations of incident and scattered plane waves to the image with specific dip angle. 2D SEG/EAGE model is used to demonstrate the improvement in the image amplitude obtained by applying the dip-angle domain amplitude correction.