Abstract: Xiaermen oilfield middle layer is in the laterhigh watery development period with many problem existed,such as the plane, interlayer contradictory prominent, theproducing degree difference is big, residual oil distributionscattered complex, well pattern density is big, comprehensive water content is higher. Therefore we carried out research on well pattern adaptability, the pattern modificationpotential, the pattern modification technology economicalboundary after remaining oil distribution research and formulated the well pattern overall adjustment countermeasure,and carried on the well pattern overall adjustment deployment.