Abstract: Shuanghe oilfield is not only a million-ton scale oilfield which has been earlier put into production in the Biyang Depression but also one of high-effectively developed onshore oilfields in China. Now it has been sliding into an oil-production decline stage with super-high water-cut. During 13-years stable production period, Shuanghe oilfield has been achieved better development effects and economic benefits through going on the premise of understanding geological characteristics and taking a measure of well pattern consummation and flood pattern modification in order to make the most use of sand capacity and keep producing in high speed (more than 2.0%) and high effectiveness from beginning to end. This article analyzes the mode of high-speed and high-effective development of Shuanghe oilfield and summarizes a set of effective development experiences for uncompartmentalized oilfields in order to use for reference to other similar types of oilfield development.