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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
180921 YQS 5
Seismic data acquisition
180921 YQS 6
Sound velocity
180921 YQS 7
Sonic Scanner
180921 YQS 8
Nuclear Methods
180921 YQS 9
• Gamma ray and neutron
• Rock matrix density
• Porosity
• Mineral composition
Lithology and TOC: Litho Scanner
180921 YQS 10
CaptureInelastic
180921 YQS 11
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
180921 YQS 12
Resistivity Imaging
180921 YQS 13
LWD resistivity map
FMI-HD
Magnetic Resonance
180921 YQS 14
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
180921 YQS 16
Analogy to Medicine
180921 YQS 17
NMR
Acoustics
Fluid sampling & analysis Resistivity (BMI)
Nuclear
180921 YQS 18
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