Dr. Houzhu Zhang is a senior geophysical consultant at Aramco Services Company in Houston. He received a B.S. in fluid mechanics in 1992 and a Ph.D. in solid mechanics from Tsinghua University in 1996. He has been working in the oil and gas industry for 20 years. His research interests include seismic modeling, anisotropy, elastic imaging, and waveform inversion. He is a member of SEG and SPE.