PROCESSING SURVEY DATA FOR DETERMINING A WAVEFIELD

摘要

Survey data corresponding to a subsurface region of interest is received. A wavefield is determined by iteratively performing the following until a specified condition is satisfied. For a current iteration, an element that includes a representation of at least one portion of the wavefield is selected based at least in part on a current residual representing an approximation error. For the current iteration, a respective data structure is computed from the selected element. The data structure is orthogonally projected onto a space spanned by a plurality of data structures including the computed data structure. The current residual is based at least in part on the orthogonal projection.