Overview of modern well-logging technology

Yiqiao Song, Schlumberger

@ARPA-e workshop : Operating at Extremes: Tools for Enhanced Geothermal Systems 180921 YQS 1

Svartsengi Power Station, Iceland

180921 YQS 2

Geothermal field development

Petroleum Field Development

180921 YQS 3

50 years

Measurement need

• Reservoir

– Geology

– Petrophysics (porosity, perm, saturation)

– Well testing

• Operational

– Drilling, LWD

– Completion, cement

– Production logging, permanent sensors

180921 YQS 4

Seismic survey

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Seismic data acquisition

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Sound velocity

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Sonic Scanner

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Nuclear Methods

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• Gamma ray and neutron

• Rock matrix density

• Porosity

• Mineral composition

Lithology and TOC: Litho Scanner

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CaptureInelastic

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Resistivity loggingFi

rst W

irel

ine

log

in a

oil

wel

l was

rec

ord

ed in

P

ech

elb

ron

n,

Fran

ce, o

n S

epte

mb

er 5

, 19

27

3D Resistivity

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Resistivity Imaging

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LWD resistivity map

FMI-HD

Magnetic Resonance

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Health Energy

MR Applications

180921 YQS 15T2 [s]Relaxation time [s]

Dif

fusi

on

Co

effi

cien

t [m

2/s

]

brine

crude oil

• Porosity

• Pore size

• Permeability

• Fluid type & quantification

• Unconventionals

Fluid sampling and analysis

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Analogy to Medicine

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NMR

Acoustics

Fluid sampling & analysis Resistivity (BMI)

Nuclear

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HTH

P T

ech

no

logi

esO

ilfie

ld R

evie

w 2

008

HTHP Technology needs ?

• Drilling: LWD

• Formation evaluation

– nuclear, resistivity, FMI, acoustic, porosity

• Production logging

– Wellbore flow, pressure & temp

• Permanent/continuous monitoring

– Downhole temp and pressure, surface flow meter for enthalpy

180921 YQS 19- included suggestions from Ann Robertson-Tait, GeothermEx

180921 YQS 20

Thank You!

Svartsengi Power Station, Iceland