Loading web-font TeX/Math/Italic

Introduction to gpsurya blog

Dear Friends, In this blog you will find around 320 solved Geophysics GATE and CSIR-NET and other competitive exams solutions with a better explanation. Please follow and share if you like it. Thanks, gpsurya and group

CSIR-NET JUNE 2018

2 comments

CSIR-NET JUNE 2018

101) The Formation factor obtained for the data given below is

Resistivity of the flushed zone=1.30Ωm

Resistivity of the mud filtrate=0.65Ωm

Residual oil saturation=25%

Saturation exponent = 2

a)0.125 
b)1.125 
c)2.125 
d)3.125
(Thanks to Suresh Sir ANU)
(Thanks to Neeraja AU)

Sol:
The relation between Resistivity of the flushed zone, Resistivity of the mud filtrate, Water Saturation and Formation factor is.

S_w^n=\frac{FR_{mf}}{R{xo}}-(1)

n=2
Above problem Residual oil saturation is given, using this we can calculate the Water Saturation using below formula.

S_w=1-S_h

S_w=1-0.25

S_w=75%

S_w=0.75

S_w^2=\frac{FR_{mf}}{R{xo}}

FR_{mf}=S_w^2R_{xo}

F=\frac{S_w^2R_{xo}}{R_{mf}}

F=\frac{(0.75)^2\times1.30}{0.65}=\frac{0.7312}{0.65}=1.125

Formation Factor  (F)=1.125

Related Posts

2 comments

Post a Comment

Subscribe Our Newsletter