Cable
Cable clamp
Cable electrode
Cable hanger
Cable head
Cable tool drilling
Cake thickness
Calcite
Calcium carbonate
Calcium sulfate
Calibration
Calibration loop
Calibration source
Calibration tails
Caliper log
Calorie
CAL Systems
Camera
Capacitor
Cap rock
Capture cross section
Capture gamma ray
Capture unit
Carbonate
Carbonate analysis log
Carbonate reef
Carbonate rock
Carbon-oxygen log
Cartridge
Cased hole
Casing
Casing collar locator
Casing collar log
Casinghead
Casing inspection log
Casing point
Casing potential profile
Casing pressure
Casing shoe
Casing string
Cathead
Cation
Cation-exchange capacity
Cationic membrane
Cat line
Catwalk
Cement
Cement evaluation log
Cementation
Cementation factor
Cement bond
Cement bond log
Cement casing
Cementing
Centigrade (Celsius) scale
Centipoise
Centralized
Centralizer
Chalcedony
Channel
Character log
Check shot survey
Chemical treatment
Chert
Chlorine log
Choke
Christmas tree
Chromatogram
Chromatograph
Circulate
Circulate out
Circulation
Clastic
Clay minerals
Clean
Collar
Collar locator
Collar log
Collimated gamma radiation
Combination logging tool
Compaction correction
Compatible scales
Compensated density log
Compensated formation density log
Compensated log
Compensated neutron log
Compensated Spectral Density
Complete a well
Completion fluid
Completion tool
Composite log
Compressibility
Compression wave, compressional wave
Compressive strength
Com-Pro Log
Compton scattering
Computed log analysis
Computer-processed interpretation
Condensate
Condensate reservoir
Conductive solid
Conductivity
Conductivity derived porosity
Conductor pipe
Cone
Confirmation well
Conglomerate
Coning
Connate water
Consolidated
Contact log
Continuity
Continuous flowmeter
Continuous guidance log
Continuous phase
Continuous velocity log
Contour map
Convection
Core
Core analysis
Core barrel
Core bit
Coregamma
Coregraph
Core sample
Core slicer
Correlate
Correlation
Correlation length
Corrosion
Coupling
CPI
Critical point
Critical pressure
Critical saturation
Critical temperature
Critical water saturation
Crooked hole
Crossflow
Crossplot
Cross section
Crown block
Crude oil
Crystalline
Curie
Curie temperature
Curve
Cushion
Cut-and-thread fishing technique
Cutoff
Cuttings
Cyber Log Systems
Cycle skip, cycle skipping
Cyclonite
Cylindrical plot