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Outline

Preface

Categories

Principles

Main contractors

NorthPars applications

MDP

s main issues

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Preface

Whats wireline logging

First wireline log-86 years ago by Conrad

and Marcel Schlumberger

Why wireline logging Fast rate

Wide range of depth

Fast and accurate decisions

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Consists of deep reading (Rt) and

shallow reading (Ri) resistivity devices

Deep and shallow measurements are

made simultaneously, attwo different

frequencies

Usually run with a Rxo measurement

(MSFL) attached to the lower portion of

the tool

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Category

Resistivity

Spontaneous potential

Lateral resistivity

Induction

Imaging

Sonic

Conventional sonic

Full wave sonic

CBL

Imaging

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Category-cont.

Nuclear

Gamma ray

Natural gamma ray spectral

Neutron

Density

NMR-Nuclear Magnetic Resonance

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VSP

Sidewall coring

Percussion

Rotary

Formation pressure testing and sampling

Old

New generation

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Side wall coring

Percussion

Rotary

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Gamma ray application

- Determination of

reservoirthickness

- Lithology indicator

- Correlation

between wells

- Estimation of shale

volume

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Main contractors

Schlumberger

CSU

MAXIS 500

Halliburton

EXCELL 2000

LOGIQ

Baker Atlas

CLS (3700)

ECLIPS (5700)

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Main contractors-cont.

Weatherford

Phase

Warrior

CS400

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Populartools

Resistivity

Schlumberger

AIT

Halliburton

Baker Atlas

Weatherford

Sonic

Schlumberger

Halliburton

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SP Log

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Caliper Log