MEASUREMENT OF CONDUCTIVITY USING COMPLEX IMPEDANCE METHODS FROM HALMAHERA ROCK SAMPLE
The polarization induction method is important in geophysical exploration. At present the analysis of rock samples resulting from drilling sites surveyed is commonplace. Analysis of rock samples (core samples) can be obtained by many methods, one of which is rock impedance measurement to determine t...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/38150 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The polarization induction method is important in geophysical exploration. At present the analysis of rock samples resulting from drilling sites surveyed is commonplace. Analysis of rock samples (core samples) can be obtained by many methods, one of which is rock impedance measurement to determine the conductivity of the rock itself. Analysis of rock samples can also show the effect of frequency on the wave phase on rocks that are electrified. Complex impedance can provide important information about the natural structural and hydraulic properties of the shaft and fluid contained in a medium. In this study, we will determine the conductivity value of the Halmahera rock samples using complex impedance methods. Rock samples of 14 pieces in the form of core samples taken from varying depths. Measurements are made by making a simple electric circuit to drain electric current in rock samples that are connected to conductors on both sides of the sample, then the physical parameters of the sample are measured using an oscilloscope. Variations in measurements are made at a given frequency from the current / voltage source with frequency variations of 10Hz, 100Hz and 1000Hz. From the results of the data acquisition, it is then processed to get a plot of frequency variation on the impedance of the rock sample and the conductivity value of the sample will be obtained. The impedance and conductivity values obtained will then be plotted on the sample studied. From these results an interpretation of the type of rock from the sample was obtained. Samples 1,12,13,14 in the form of shales / mafic, sample 2 in the form of ignite, coal / metamorph, samples 3,4,5,6,7,8,9,11 in the form of graphite / massive sulfide and sample 10 in the form of mafic / graphite. |
|---|