Table of Contents
What is core logging in geology?
Core logging is a highly specialized skill requiring careful observation and accurate recording. Geophysical logging of the hole created in the drilling process is sometimes done without the collection of the core.
What is geotechnical core logging?
Geotechnical core logging provides data and parameters necessary for rock mass classification and should be conducted so that the data can be easily applied to all industry standard classification systems.
What is logging and coring?
Logging is a term that refers to the string of instruments that is lowered down into and out the bottom of the drill pipe after drilling a hole. The instruments measure characteristics of the hole wall such as density. Coring is a process where the drill bit cuts a 4 inch cylinder out of the rock.
What is the purpose of core logging?
Core logging is the systematic recording and measuring of as much information as possible/required to determine the lithology (rock types), mineralogy, potential geological history, structure and alteration zones through a tiny piece of cylindrical rock drilled and removed from a potential mineral deposit.
What is the purpose of core sampling?
Core samples are small portions of a formation taken from an existing well and used for geologic analysis. The sample is analyzed to determine porosity, permeability, fluid content, geologic age, and probable productivity of oil from the site.
How much does a core box weigh?
Volume per Bundle
| Bundle | Height | Weight |
|---|---|---|
| 120 units | 33.07 in | 840 lbs |
| 180 units | 48.82 in | 1260 lbs |
| 240 units | 64.17 in | 1680 lbs |
How are core samples collected?
Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a hollow steel tube, called a core drill. The hole made for the core sample is called the “core hole”. A variety of core samplers exist to sample different media under different conditions.
What is the difference between drilling and coring?
Concrete coring is similar to drilling; however, rather than using a small drill bit, coring uses a large, round cutting tool on the end of the drill. This cutting tool bores through concrete, creating a much larger hole than a drill.