p311_00c_hwk_7_spe19577_rev

Petroleum Engineering 311Reservoir Petrophysics

Homework 7 — Correlation of Resistivity Index: Waxman-Smits Model20 November 2000 — Due: Monday 27 November 2000

Problem: Evaluation of Resistivity Index Using the Waxman-Smits Model.

For each individual data set you are to:

7.1. You are to analyze the Resistivity Index (I=Rt/Ro) data taken from paper SPE 19577. Use the Waxman-Smits water saturation model.

7.2. Discuss your results—and comment on the applicability of the Waxman-Smits water saturation model.

You are REQUIRED to work these tasks by hand—you can CHECK your work with a computer product such as MS Excel, but you will be expected to be able to work pro-blems of this type BY HAND.

Data: Resistivity Index Data (from paper SPE 19577)

PointSw

(fraction)

<AUS12*2>I

(Rt/Ro)

<CON5*1>I

(Rt/Ro)

<CON5*2>I

(Rt/Ro)1 0.20 --- --- 3.202 0.25 --- 6.47 2.993 0.30 --- 5.58 2.784 0.35 4.19 4.57 2.575 0.40 3.70 4.08 2.386 0.45 3.25 3.61 2.217 0.50 2.84 3.21 2.058 0.55 2.49 2.85 1.909 0.60 2.18 2.53 1.74

10 0.65 1.95 2.25 1.6311 0.70 1.74 1.99 1.4812 0.75 1.57 1.79 1.3813 0.80 1.40 1.59 1.2914 0.85 1.30 1.42 1.2115 0.90 1.19 1.26 1.1316 0.95 --- 1.12 1.05



Archie/Waxman-Smits Resistivity Index Correlation: Data Grid

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Archie Resistivity Index Correlation: Type Curve Plot

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Archie/Waxman-Smits Resistivity Index Correlation: Type Curve Plot (n=1.0)

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Data Plot from SPE 19577: Case AUS12*2

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Data Plot from SPE 19577: Case CON5*1

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Data Plot from SPE 19577: Case CON5*2

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p311_00c_hwk_7_spe19577_rev

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