产能分析方法在H盆地BDT油层块状底水潜山油藏中的应用

针对H盆地BDT油层块状底水潜山油藏底水能量活跃和油层具有较强的水敏特征,利用水测相对渗透率曲线和2种粘土稳定剂溶液(5号粘土稳定剂和7号粘土稳定剂)测得的相对渗透率曲线,分析了该油藏含水率变化规律及其影响因素,进而采用吕氏方法,Dupuit公式,Schols公式,MG方法和李传亮方法对临界产量及其影响因素进行了分析。研究表明,粘土稳定剂的使用可以使含水率上升更趋于平缓,低含水阶段采收率幅度最高;随着打开程度增大,合理产量出现最大值,在打开程度为50%时,临界产量达到最大值;最佳压差随打开程度增大而降低。

Productivity Analytical Methods for Bottom Water and Block Buried Hill Reservoirs and Application

In consideration of the characteristics of active bottom water and water sensitivity in the reservoirs in bulk Hailaer Hill reservoirs in Budate Area,by using the relative permeability curves detected with water-tested relative permeability curves and two clay stabilizer solvents(No.5 and 7 clay stabilizers),the rules of water content changes in Budate hill reservoir and its influential factors were analyzed.By using Lu’s method,Dupuit formula,Schols formula,MG methods and Li Chuan-liang’s method,the critical production rate and its affecting factors are analyzed.Study result shows that as the clay stabilizer is used the water content increase tends to be gentle,the highest oil recovery rate is obtained at the low water-cut stage;with the increase of opening degree,the highest reasonable production is obtained,at the opening extent of 50%,the maximum critical production is obtained;optimal pressure difference decreases with the increase of opening extent.