Productivity evaluation of horizontal well in heterogeneous reservoir with composite water aquifer

Abstract Horizontal well is an important way to develop thin reservoir with edge-bottom water aquifer. For the horizontal near oil–water contact, have features of edge and bottom at same time. The productivity formula in pure or not fully applicable this type reservoir. heterogeneous composite aquifer, divided into multiple sections by using concept multi-segment well. Based on seepage mechanics theory potential superposition principle, considering mutual interference between multi sections, aquifer established. new considers effect heterogeneity, quasi-linear flow lateral ellipsoidal vertical water. It can effectively determine influence range drainage distance a According test data wells Weizhou 11-1 oilfield, b fitted used predict wells, result very good. research lays foundation for prediction