During this quarter, research on the proppant settling model included the following three topics: (1) a comparison of computed settling velocities from the Sutrick and Rybicki model with available settling data, (2) a study of the influence of various factors, such as leak-off rate and fluid density, on proppant settling velocity, and (3) identifying and implementing the method of data transfer from the fracture geometry model at NIPER to the proppant transport model at The University of Tulsa. Progress on each of these topics is summarized. 5 refs., 2 figs., 4 tabs.