孤东油田水平井合理生产压差研究

孤东油田属于底水疏松砂岩油藏，出砂严重，底水锥进速度快，本文从不出砂以及减缓底水上升两个方面进行合理生产压差研究，应用摩尔-库伦准则计算了孤东油田出砂临界生产压差为2.11 MPa；应用数值模拟方法综合考虑了不同生产压差下含水率以及累产油的变化，得到了减缓底水上升的合理压差为6 MPa，综合考虑得到孤东油田水平井合理生产压差为2.11 MPa，为水平井合理开采提供理论依据。

Research on Proper Production Pressure Drawdown of Horizontal Wells in Gudong Oil Field

Gudong Oil Field is a unconsolidated sandstone reservoir with abundant bottom water, therefore,the problem of sand production and bottom water coning occur in this reservoir. This article conduct the research from the aspects of sand control and slowing down bottom water coning. The result of critical san production pressure is 2.11 MPa calculated by Mohr-Coulomb criterion, and proper pressure to prevent water coning is 6 MPa by numerical simulation,considering both water ratio and oil production, so the reasonable pressure of gudong Oil Field is 2.11 MPa,which provides the theoretical evidence to develop horizontal well efficiently.