Abstract：Palaeo-vertical becomes a curve in deformed cross section,this is because thevertical in an original cross section was deformed.In the light of the geometry ofstratum and fault,palaeo-vertical method offers a family of palaeo-verticals whichare used to resume a cross section.Its key lies in the determination of deforrnationmechanism.The presumption of deforrnation rnechanism can be considered as the essential of palaeo-vertical.The paper sketches basic and improved palaeo-vertical essentials.Resumed seismic trace is obtained by downward resampling the amplitudesof a deformed seismic trace along the palaeo-vertical.On the basis of the principle ofpalaeo vertical method,the authors have deveIoped the corresponding softwares,which have been applied to section balance processing of real seismic data.
