Inter - well communication ratio and control degree of waterflooding in Chaheji oilfield, a complex fault block reservoir of fluvial facies, are still low after primary well pattern thickening.

• 岔河集油田属河流相沉积复杂断块油藏,一次加密结束后油田依然存在井间油层连通率低,油层水驱控制程度低的问题。