Abstract: The XHBX3D block in the north of Tianshan is characterized by serious fluctuated surface and complex near-surface structures.The near-surface structure model cannot be accurately established only by using the limited uphole data.Affected by surface conditions and thin high-velocity interbed,accurate actual correction interface cannot be observed by minor refraction.In field seismic record,“side lobe” before first break and background interference are serious,so the refraction modeling based on first break cannot be applied.In order to obtain accurate surface structure,we combined transient electromagnetic method (TEM) with seismic uphole method.Firstly,surface electric structure was inversed by 1D “forward modeling correction”.Then,resistivity was transformed into velocity by the calibration of seismic uphole data and the fitting of nonlinear high-order polynomial.Thirdly,the velocity-thickness distribution of surface structure in the plane was obtained by Kriging gridding interpolation.Finally,complete 3D near surface structure model was achieved.After applying the model to compute static amount and carry out subsequent processing,the S/N of stack profile was obviously enhanced,the continuity of reflection events was largely improved,and the static correction problem of middle-wavelength and long-wavelength were partly solved.