Dec 20, 2018 · Borehole geophysics is the science of recording and analyzing measurements of physical properties made in wells or test holes. Probes that measure different properties are lowered into the borehole to collect continuous or point data that is graphically displayed as a geophysical log. Multiple logs typically are collected to take advantage of their synergistic …

Borehole logging, also known as well logging is the detailed recording of the in situ ground conditions encountered in a borehole. The required information result from visual inspection of samples brought to the surface or from geophysical measurements along the axis of a borehole carried out with a special logging device that is lowered into the hole.

Definition of borehole pressure. The pressure that the hot gases of detonation exert on the borehole wall. It is primarily a function of the density of the explosive and the heat of explosion. Synonym of: gas pressure.

Definition of borehole log. A record, made by the driller or geologist, of the rocks penetrated in the borehole. In the laboratory, a more detailed log is prepared giving particulars relating to lithology, paleontology, water analysis, etc. See Also: electric log, well log. Ref: Nelson. Click here to see list of references, authorities, sources ...

Borehole is a synonym of wellbore. As nouns the difference between borehole and wellbore is that borehole is a hole bored into the ground to collect samples for analysis or to extract oil or water while wellbore is an oil field term referring to the …

Borehole Pressure. Total pressure exerted in the wellbore by a column of fluid and/or backpressure imposed at the surface. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards. Source: IADC UBO / MPD Glossary, December 2011. Global Standards. B, Global Standards.

Jul 02, 2015 · Borehole imaging. The term "borehole imaging" refers to those logging and data-processing methods that are used to produce centimeter-scale images of the borehole wall and the rocks that make it up. The context is, therefore, that of open hole, but some of the tools are closely related to their cased-hole equivalents.

Deep borehole disposal (DBD) is the concept of disposing high-level radioactive waste from nuclear reactors in extremely deep boreholes instead of in more traditional deep geological repositories that are excavated like mines. Deep borehole disposal seeks to place the waste as much as five kilometres (3 mi) beneath the surface of the Earth and relies primarily on the …

maximum borehole pressure and take in drilling fluid. When the borehole pressure is reduced the initiated fractures close and may give mud back (often associated with a build-up in annular pressure)4. Parameters Influencing Borehole (In)stability While drilling borehole instability problems may arise solely due to inadequate or too high mud weight

What is groundwater? Groundwater is water that exists underground in saturated zones beneath the land surface. The upper surface of the saturated zone is called the water table. Contrary to popular belief, groundwater does not form underground rivers. It fills the pores and fractures in underground materials such as sand, gravel, and other rock ...

In subsurface hydrogeology, drawdown is the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test. In surface water hydrology and civil engineering, drawdown refers to the lowering of the surface elevation of a body of water, the water table, the piezometric surface ...

Within SCIA it is possible to define soil and water loads by using a borehole profile in which you specify the different layers of the geological profile. This procedure will avoid the use of free surface loads. All the steps you need to apply are explained by the example of the following fictive soil composition: 0 – 1,5 m: gravel clay

A core sample is a cylindrical section of (usually) a naturally-occurring substance. 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 ...

Jul 23, 2019 · The rotary cutting tool used in reaming is known as a reamer. Like drill bits, reamers also remove material from the workpiece on which they are used. However, reamers remove significantly less material than drill bits. The primary purpose of reaming is simply to create smooth walls in an existing hole. Manufacturing companies perform reaming ...