Drilling fluid
In geotechnical engineering, drilling fluid, also called drilling mud, is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells…
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Oil well drilling is a complex operation and the drilling industry engages the services of personnel and a complicated array…
Resistivity logging
Resistivity logs are electrical well logs that record the resistivity of a formation. Resistivity is usually recorded in ohm meters…
Acoustic logging
Petroleum applications of acoustic-wave-propagation theory and physics include both: · Surface-geophysical methods · Borehole-geophysical methods Acoustic logging is a subset of borehole-geophysical…
Neutron porosity logs
The neutron-porosity log first appeared in 1940. It consisted of an isotopic source, most often plutonium-beryllium, and a single detector.…
Density Logging
The measurement of formation density is an essential component in accurate reservoir evaluation, helping the petrophysicist to determine the porosity…
Openhole caliper logs
Openhole caliper logs provide data used in completion planning. Openhole calipers can be used with different types of logging tools…
Gamma ray logs
The radioactivity of rocks has been used for many years to help derive lithologies. Natural occurring radioactive materials (NORM) include…
Spontaneous potential logging
Spontaneous potential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise rock formation properties.…
Formation evaluation
In petroleum exploration and development, formation evaluation is used to determine the ability of a borehole to produce petroleum. Essentially, it is the process of…
Mud logging
Mud logging, in its conventional implementation, involves the rig-site monitoring and assessment of information that comes to the surface while…
How Does Logging-While-Drilling (LWD) Work?
For centuries, drillers (whether drilling for oil or water) have been keeping keen notes of drilling activities. What started as…
