Abstract: The Badaowan reservoir in D-12 well area in Cainan oilfield is characterized by serious heterogeneity, developed big pores, rapid climbing water cut and poor response of small dose profile control, etc. This paper puts forward a managing idea of early applicating deep profile controlling technology and conducting overall deep profile control in this area. A jel system for deep profiel control dominated by polyacrylamide that is more suitable for this area is developed. In order to enhance plugging capacity to bigger water breakthrough channels, the solid grains are added into the system. In 2010, the profile controls were conducted in four well groups in D-12 well area, then averaging injection pressure in injection wells rises by 1.85 MPa, daily oil increases from 2.0 t to 3.1 t, composit water cut decreases from 57.8% to 56.6%, and present cumulative incremental oil amounts to 1 063 t in the four well groups.

Key words: Cainan oilfield, D-12 well area, deep profile control, polymer, gel, solid grain