Sensitivity study of horizontal length, offset from water oil contact and withdrawal rate of horizontal well in bottom water drive reservoir

Abstract

Estimation of critical rate is required for maximizing oil production from horizontal well before water breakthrough. Post-breakthrough recovery is dependent on parameters viz: Horizontal length (L), withdrawal rate (Q) and offset from WOC (h). Critical rate has been determined using various analytical methods whereas EUR from horizontal well has been calculated for forty-eight cases (L-4 no’s, Q-3 no’s, h-4 no’s) using commercial black oil simulator. Result of the study shows that maximum impact on cumulative oil production is given by offset from WOC followed by withdrawal rate and lastly on horizontal well length.