Abstract: As a heavy oil reservoir,Suizhong 36 - 1 oilfield was put into production in 1993 and the main problem it is facing now is how to make a study on residual oil distribution by the use of available data because of lacking of dynamic monitoring data.This paper,in combination with comprehensive reservoir analysis and numerical simulation technology, makes a research on residual oil distribution and the research results show 80%of drilled oil reservoir is in line with the description,which,therefore,lays a good foundation for the successful adjustment of the whole oilfield.