Abstract: Adaptability of well patterns in Baobei block are analyzed in respects of the types of well pattern, water-injection methods, waterflooding control and the ratio of producing reserves, fluid supply capacity of producers, drive index and so on. It points out that circle flooding mode and the irrational flooding well spacing are the causes of current well patterns being not adaptable to the needs of oilfield development. Some measures and proposals are presented to improve development effects including allocating additional internal water injectors, reducing flooding well spacing, replacing circle flooding mode with line flooding mode, enhancing internal water injection and strengthening layered stimulation.