Resistivity measurement method of rock and ore specimen
A measurement method and resistivity technology, applied in the field of geophysical exploration, can solve the problems of limited measurement range, burnout, inability to achieve high-accuracy measurement, etc., and achieve the effect of avoiding saturation problems
Active Publication Date: 2014-12-03
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The defect of this measurement method is that when the resistivity of the rock ore specimen is extremely low, the current passing through the rock ore specimen is very large, which may cause the ammeter to saturate or burn out, so the rock ore specimen with extremely low resistivity cannot be measured
Another problem is that when the resistivity of the rock ore specimen is very high, the current passing through the rock ore specimen is very small, and the ammeter cannot measure the weak current, which leads to the inability to accurately measure the resistance of the sample.
Therefore, high-resistivity rock ore specimens cannot be measured with high accuracy by using existing devices, and sometimes even because the resistivity of rock ore specimens is too high to measure
The above-mentioned problems have greatly limited the measurement range of the resistivity of rock ore specimens, and neither rock ore specimens with low resistivity nor high resistivity rock ore specimens can achieve high-accuracy measurement
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment approach
[0029] (1) Connect the resistance box and the rock ore specimen in series, and apply a given voltage (U0) between the other end of the resistance box and the other end of the rock ore specimen after series connection; the maximum resistance of the resistance box is not less than 10MΩ, the voltage value of U0 Not less than 10V.
[0030] (2) Connect the voltage measuring instrument voltmeter 1 and voltmeter 2 to the resistance box and the rock ore specimen respectively, adjust the resistance of the resistance box, and measure the voltage U1 at both ends of the resistance box (voltmeter 1) and the two ends of the rock ore specimen (voltage The voltage U2 in Table 2), read the resistance of the resistance box through the scale on the resistance box, and the resistance of the rock ore specimen is obtained by the following formula:
[0031] I2=I1=U1 / R1 (2)
[0032] R2=U2 / I2=U2 / U1×R1 (3)
[0033] Wherein, I1 and I2 respectively represent the electric current passing through the res...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
Provided is a resistivity measurement method of a rock and ore specimen. One end of a resistance box is connected with one end of the rock and ore specimen, and a given voltage is applied between the other end of the resistance box and the other end of the rock and ore specimen. First, the resistance of the resistance box is adjusted to be a large value, the resistance box is ensured to be passed through a safe supply current even the resistivity of the rock and ore specimen is low under the given supply voltage, if the current passing through the resistance box is large, the resistance R1 of the resistance box is increased, then U1 and U2 are measured again, and R2 and the resistivity are calculated. According to the invention, direct measurement of the current is prevented, and high-precision measurement of the current is realized through measuring the voltage of a high-precision resistor loaded on the resistance box, hence the problem that the current is too large or too small to measure caused by the measurement current directly though an ammeter is prevented.
Description
technical field [0001] The invention relates to the field of geophysical exploration, in particular to a method for measuring the resistivity of rock ore samples. Background technique [0002] Electrical prospecting is the main geophysical method for solid mineral, geothermal, groundwater and oil and gas exploration. The resistivity of rock ore specimens provides necessary supporting data for electrical exploration design and electrical exploration data interpretation, and is a key parameter that must be used in electrical exploration. The resistivity measurement of rock ore specimens is a necessary step to obtain the resistivity of rock ore specimens. The accuracy of the measurement results is directly related to the effect of electrical exploration and the understanding and evaluation of rock physics. The traditional method for measuring the resistivity of rock ore specimens is directly based on Ohm's law. The specific procedure is as follows (see figure 1 ): [0003] ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
Inventor 何兰芳陈儒军何展翔米晓利宋喜林
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap