Abstract: The optimum position of horizontal section for heavy oil reservoir with bottom water of Leng-41 block in Liaohe oilfield by horizontal driling process is studied by using the reservoir numerical simulation technique. The ratio between horizontal, vertical permeability and horizontal permeability, the viscosity-temperature relationship of the crude, the fraction multiple of the botom water and the effect of varied pay- zone thickness on the horizontal section position are analyzed. The numerical simulation results from different cases show the dimensionless distance of the horizontal section position to the bottom water, obtaining the chart changing with other parameters and matching formulas. This method can be as a guide for the similar heavy oil field development.

Key words: Liaohe oilfield, heavy oil reservoir, bottom water, horizontal well, numerical simulation