一种计算油井静压的新方法及其应用

油井静压与油层中深、动液面、流体密度、含水、采液指数等因素有关，运用混液密度与含水、原油密度关系式，流压与混液密度、油层中深、动液面关系式计算出流压。再运用采液指数与含水关系式，生产压差与日产液、采液指数关系式计算出生产压差。最后运用静压与流压、生产压差关系式计算出油井静压。把计算出的油井静压与实际测得的油井静压进行分析对比确定出该方法的可信度。用该方法进行油藏压力评价，比传统方法更精确。

A New Method of Calculation Oil Well Static Pressure and Its Application

Oil well static pressure is relevant to reservoir depth,producing fluid level,fluid density,water cut,producing fluid index and other factors.We apply formula of mix-fluid density with water cut,crude oil density and formula of flowing pressure with mix-fluid density,reservoir depth and producing fluid level to calculate flowing pressure.We also apply formula of producing fluid index with water cut and formula of producing pressure drop with daily fluid production and producing fluid index to calculate producing pressure drop.Formula of static pressure with flowing pressure and producing pressure drop is used to calculate oil well static pressure.Comparing calculated result with real test oil well static pressure,we can determine this method is true.This process can be used to compile a computer program.Only by inputing reservoir depth,daily fluid production,water cut,flowing pressure and crude oil density can you get oil well static pressure.When this method is used to evaluate reservoir pressure,it is more accurate than traditional method.