摘要
刘国民,郝振宪,张鲁惠.利用非线性模型求储层孔隙度的多因素计算公式.测井技术,1999,23(4):273~275孔隙水中的束缚水占的是无效孔隙,它与所测的地层电阻率有关。为此,在用声波时差计算孔隙度的公式中引入了Rt,得到了声波时差、电阻率和孔隙度的经验关系式。统计的相关系数高达0.986,平均孔隙度的绝对误差仅为0.59%。此多因素公式在储层埋深相差很大,孔隙度变化范围也相当大的文留油田应用,大大提高了所计算的孔隙度值的可信度和准确性。
Invalid
porosity occupied by irreducible water is related with the measured formation resistivity.
Therefore while deriving porosity from interval transit time Rt is introduced and an
empirical relationship among interval travel time, resistivity and porosity is obtained.
The statistic correlation factor is as high as 0.986 and the absolute error of the mean
porosity is only 0.59%. This multifactor equation has been used in Wenliu Oilfield
where the depths of oil resrvoirs are quite different and the porosity range is very
large. The application result shows the confidence level and precision of the computed
porosity are greatly increased.
出处
《测井技术》
CAS
CSCD
北大核心
1999年第4期273-275,共3页
Well Logging Technology
关键词
非线性方程
电阻率
孔隙度
储集层
模型
: nonlinear equationresistivityinterval transit
timeeffective porosityWenliu Oilfield