The utility model belongs to the oil gas field of mineing, in particular to well pattern structure that can improve the oil reservoir ultimate recovery, this well pattern structure arranges in the fractured reservoir, and the fractured reservoir is concentrated including a plurality of cracks along the horizontal direction extends and is grown intervals, and the concentrated interval of growing in every crack all includes a plurality of cracks growth district, and wherein, well pattern structure includes: the water injection well passes at least one crack and concentrates the growth interval, many mouthfuls of perpendicular oil recovery wells, equipartition are around the water injection well, and every mouthful of perpendicular oil recovery well passes at least one crack growth district, the many mouthfuls of flat oil recovery wells of horizontal saliva are arranged around the well that recovers the oil perpendicularly. The utility model provides a well pattern structure has increased the scope that affects of injected water, and the water drive reserves who has improved the fractured reservoir employs the degree, has improved the ultimate recovery of fractured reservoir, has improved the development effect of fractured reservoir.