注水开发油田累积含水率及其关系式

The cumulative water and its formula in waterflood oilfield

本文通过建立注水开发油田累积含水率F与综合(瞬时)含水率fw关系式[1],提出了F与fw关系式及其理论图版,分析阶段和极限累积含水率的影响因素。结果表明:①当时0<fw<1时,F<fw;②F与fw关系主要受b值或地层粘度影响;③极限累积含水率FR与b值或地层粘度成正比,即b值(或地层粘度)越小,FR越小,反之则相反;④由于累积含水率F具有较强的稳定性,可以应用F与fw关系求得f计算与目前实际f实际对比,可以分析判断目前(瞬时)含水fw稳定性或可靠性。

This paper puts forward the equation between F and fw、theoretic plate、the affecting factor of staggered and ultimate cumulative water cut by setting up the formula between the cumulative water cut and the complex water cut,The results show: ①As 0<fw<1,f<fw ②The relation between f and fw is effected by b or μ③The ultimate water cut(Fr) and b orμ are in direct ratio④ With the better stability of F,we can compare the practice f with the calculated f sought by the equation between F and fw to estimate the stability and reliability of the complex water cut