The remaining oil in the fault edge of Lamadian oilfield is relatively enrichment. Conventional methods cannot accurately describe the fault structure features. Therefore, in this text using the combination of well and seismic technology as the core, multidisciplinary reservoir fine description as method, structural characteristics is studied, the remaining oil is quantified, and the residual oil along fault is tapped by taking the high angle directional well. Since 2009, 12 high angle directional well are successively designed in the 37#, 51# and 15# fault edge, which has made good effects. Through the analysis of high angle directional well development effect, the high angle directional well technology characteristics and the tapping type of potential of residual oil were determined. By optimizing the adjustment measures, the longterm development of high angle directional well was effectively guaranteed. At the same time, the large fault edge remaining potential was further defined, which provide a basis for the development of fault edge and increase of water flooding recoverable reserves.