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Logging techniques and measurements

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Mukhabbat Seidualiyeva

on 31 January 2017

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Transcript of Logging techniques and measurements

Well logging, also known as wireline logging, is a method of data collection in the borehole environment which enables the determination of subsurface physical properties and reservoir parameters. Measurements are collected versus depth along a well and there are many different types of wireline tools depending on the physical property of interest. In general, well logs respond to variations in rock matrix and pore fluid composition.

Caliper log
A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth and is commonly used in hydrocarbon exploration when drilling wells. The measurements that are recorded can be an important indicator of cave ins or shale swelling in the borehole, which can effect the results of other well logs.
Temperature log
After a well is drilled to a desired depth a tool is lowered into the hole that measures temperature and pressure (and often flow) at depth. This information is plotted onto a log and allows production specialists or reservoir engineers to estimate the capacity of a well given the temperature and pressure profile.
Logging techniques and measurements
The are three main types of well logging :
1.Temperature log
2.Resistivity log
3.Caliper log
Resistivity log
Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current. In these logs, resistivity is measured using 4 electrical probes to eliminate the resistance of the contact leads. The log must run in holes containing electrically conductive mud or water.
Gamma log
Gamma logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is a wireline logging method used in mining, mineral exploration, water-well drilling, for formation evaluation in oil and gas well drilling and for other related purposes. Different types of rock emit different amounts and different spectra of natural gamma radiation.
Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock (i.e. matrix) and the fluid enclosed in the pore spaces.
Density log
Performed by: Mukhabbat Erzhan Gaziz
Nurzhan Amirzhan Adilbek
Supervisor : Bulekov Arsen

Wireline logging techniques
Types of wireline logging
Temperature logging
Caliper logging
Resistivity logging
Gamma logging
Density logging
Wireline logging
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