Geophysical Logger Borehole Caliper Natural Gamma Spontaneous Potential 64" Long Normal Resistivity 16" Short Normal Logging System Borehole Well Logging Tools
China Geophysical Logger Borehole Caliper Natural Gamma Spontaneous Potential 64" Long Normal Resistivity 16" Short Normal Logging System Borehole Well Logging Tools, Find details about China Geophysical Logger, Natural Gamma Logging from Geophysical Logger Borehole Caliper Natural Gamma Spontaneous Potential 64" Long Normal Resistivity 16" Short Normal Logging System Borehole Well Logging Tools
Basic Info.
Model NO.
GDQ-2D
Depth
100m to 3000m
Parameter
Gr, Sp, Resistivity, Caliper, Density
Application
Water Well, Coal, Mining Borehole
Signal
Digital
Winch
Manual/Eletrical Winch
Logging Probe Diameter
40mm
Cable
1/8" and 3/16" Armored Cable
Power Supply
Generator Power Supply
Trademark
GOLD
Transport Package
Export Case
Specification
ISO9001
Origin
Chongqing, China
HS Code
9015800090
Model NO.
GDQ-2D
Depth
100m to 3000m
Parameter
Gr, Sp, Resistivity, Caliper, Density
Application
Water Well, Coal, Mining Borehole
Signal
Digital
Winch
Manual/Eletrical Winch
Logging Probe Diameter
40mm
Cable
1/8" and 3/16" Armored Cable
Power Supply
Generator Power Supply
Trademark
GOLD
Transport Package
Export Case
Specification
ISO9001
Origin
Chongqing, China
HS Code
9015800090
Product Desciption
Geophysical Logger Borehole Caliper Natural Gamma Spontaneous Potential 64" Long Normal Resistivity 16" Short Normal Logging System Borehole Well Logging Tools
In addition to the numerous surface geophysical services we provide, we also offers a full suite of down-hole geophysical methods to meet our client's specific needs. Borehole geophysical logging involves measuring the physical properties of the surrounding medium with a sensor located in a borehole. Down-hole geophysical measurements are made in situ and thus can provide highly accurate information about subsurface properties. Down-hole methods also provide a means of correlating geological formations from one borehole to another. A variety of geologic information can be obtained from borehole geophysical surveys.
The Gamma Ray Logging System (GR) is a portable, hand-operated geophysical instrument used in exploration for uranium, potash, and base metals, as well as for petroleum and ground water. The GR identifies lithology's and stratigraphic correlations in boreholes (case or uncased), liquid or air filled. The GR system has three main components: a gamma ray detecting probe, 500 feet (152 m) of four-conductor geophysical logging cable on a cable reel, and a digital counter instrument. Typical capabilities include logging of 2" (5 cm) monitor wells, hollow stem augers, and small diameter boreholes. The GR logging apparatus is manually lowered, and raised, within the borehole. Readings are taken point by point up the well bore and recorded by the operator. These data points are then plotted on a logging form to obtain the graphical log needed for interpretation. The instrument at the surface is designed to accept the output of a scintillation detector.
Caliper Logs - measure the diameter of an uncased borehole versus depth. Borehole enlarged by caving or dissolution of minerals. Hole diameter may be less than drill-bit because of mud cake or squeezing out of a soft clay by the weight of overlying sediment. When the caliper tool is rotated as it is lowered it is possible to see deformation (elongation) of the borehole, which can be used to infer the stress field
Temperature logs - can be used to reveal different thermal zones due to changes in thermal conductivity, variations in basal heat flow, temporal variations in surface temperature (i.e., climate change) or fluid flow in permeable layers. Drilling and mud circulation profoundly changes the temperature field. Logging must be done after the borehole has had time to equilibrate.
Geophysical Ves Prospecting Resistivity Meter Vertical Electrical Sounding Exploration Instrument 1d Resistivity Sounding Equipment for Groundwater Detection
Single-Point Resistance - tool measures resistance between 2 current electrodes. If borehole fluid is homogeneous, variations in resistance are caused by lithology. Clay and shale have low resistance and sand and gravel have high resistance. Increasing pore water salinity will cause a decrease in resistance.
Resistivity - tool measures resistivity (as opposed to resistance) with 2 current electrodes and 2 measurement electrodes. 3 different configurations: short-normal, long-normal, and lateral. Short normal has the smallest distance between 2 adjacent electrodes (16 inches). It is the most sensitive to thin layers but is also influenced by the drilling mud. Lateral log has the longest distance between two adjacent electrodes 18 feet 8 inches). It samples resistivity over a large section of sediment/rock away from the borehole. Lateral log may miss thin beds.
Spontaneous Potential - natural processes produce an electrical current.
Occurrence of Self-Potentials
Liquid-junction - when formaton water and mud filtrate have different salinities, ions migrate from the high salinity fluid to the low salinity fluid. Chloride anions migrate more readily than cations, which produces an electrical current.Membrane - Ions also migrate through the shale. Cations migrate more readily than chloride anions, which produces an electrical current.
Measurement of self-potentials - Voltage is measured between a ground electrode at the surface and an electrode lowered down the well. When formation water is saltier than the drilling mud, shale has a positive SP response and sand a negative SP response.Interpretation and Application - SP logs are used to distinguish shale from sand and to estimate percent sand. In addition, it can be used to estimate pore water salinity in clean sands. The SP log is also used in correlation work especially in conjunction with resistivity logs.
In addition to the numerous surface geophysical services we provide, we also offers a full suite of down-hole geophysical methods to meet our client's specific needs. Borehole geophysical logging involves measuring the physical properties of the surrounding medium with a sensor located in a borehole. Down-hole geophysical measurements are made in situ and thus can provide highly accurate information about subsurface properties. Down-hole methods also provide a means of correlating geological formations from one borehole to another. A variety of geologic information can be obtained from borehole geophysical surveys.
The Gamma Ray Logging System (GR) is a portable, hand-operated geophysical instrument used in exploration for uranium, potash, and base metals, as well as for petroleum and ground water. The GR identifies lithology's and stratigraphic correlations in boreholes (case or uncased), liquid or air filled. The GR system has three main components: a gamma ray detecting probe, 500 feet (152 m) of four-conductor geophysical logging cable on a cable reel, and a digital counter instrument. Typical capabilities include logging of 2" (5 cm) monitor wells, hollow stem augers, and small diameter boreholes. The GR logging apparatus is manually lowered, and raised, within the borehole. Readings are taken point by point up the well bore and recorded by the operator. These data points are then plotted on a logging form to obtain the graphical log needed for interpretation. The instrument at the surface is designed to accept the output of a scintillation detector.
Caliper Logs - measure the diameter of an uncased borehole versus depth. Borehole enlarged by caving or dissolution of minerals. Hole diameter may be less than drill-bit because of mud cake or squeezing out of a soft clay by the weight of overlying sediment. When the caliper tool is rotated as it is lowered it is possible to see deformation (elongation) of the borehole, which can be used to infer the stress field
Temperature logs - can be used to reveal different thermal zones due to changes in thermal conductivity, variations in basal heat flow, temporal variations in surface temperature (i.e., climate change) or fluid flow in permeable layers. Drilling and mud circulation profoundly changes the temperature field. Logging must be done after the borehole has had time to equilibrate.
Geophysical Ves Prospecting Resistivity Meter Vertical Electrical Sounding Exploration Instrument 1d Resistivity Sounding Equipment for Groundwater Detection
Single-Point Resistance - tool measures resistance between 2 current electrodes. If borehole fluid is homogeneous, variations in resistance are caused by lithology. Clay and shale have low resistance and sand and gravel have high resistance. Increasing pore water salinity will cause a decrease in resistance.
Resistivity - tool measures resistivity (as opposed to resistance) with 2 current electrodes and 2 measurement electrodes. 3 different configurations: short-normal, long-normal, and lateral. Short normal has the smallest distance between 2 adjacent electrodes (16 inches). It is the most sensitive to thin layers but is also influenced by the drilling mud. Lateral log has the longest distance between two adjacent electrodes 18 feet 8 inches). It samples resistivity over a large section of sediment/rock away from the borehole. Lateral log may miss thin beds.
Spontaneous Potential - natural processes produce an electrical current.
Occurrence of Self-Potentials
Liquid-junction - when formaton water and mud filtrate have different salinities, ions migrate from the high salinity fluid to the low salinity fluid. Chloride anions migrate more readily than cations, which produces an electrical current.Membrane - Ions also migrate through the shale. Cations migrate more readily than chloride anions, which produces an electrical current.
Measurement of self-potentials - Voltage is measured between a ground electrode at the surface and an electrode lowered down the well. When formation water is saltier than the drilling mud, shale has a positive SP response and sand a negative SP response.Interpretation and Application - SP logs are used to distinguish shale from sand and to estimate percent sand. In addition, it can be used to estimate pore water salinity in clean sands. The SP log is also used in correlation work especially in conjunction with resistivity logs.
No | Model/ Name | Parameter to Measure |
1 | JDX-2Dr Resistivity & Gamma Probe | SP, Apparent Resistivity, Natural Gamma |
2 | JDX-3Dr Combined Probe | 16"/64" Resistivity, SP, Natural Gamma, Temperature, SPR |
3 | JJH-2 Res/IP Probe | 16"/64"Resistivity, SP, IP |
4 | JCX3-GMD Laterolog & Gamma | Laterolog-3 Resistivity, Natural Gamma, SP |
5 | JCC-2A Three-component Magnetometer | Magnetic Tri-component |
6 | JCH-2 Magnetic Susceptibility Probe | Susceptibility |
7 | JWY-1 Temperature & Fluid Resistivity | Temperature, Fluid Resistivity |
8 | JWL-2W Flow Combined Probe | Temperature, Water level, Flow |
9 | JJX-3DA High Precision Inclination Probe | Vertex Angle, Azimuth |
10 | JJY-3D Three-Arm Caliper | Diameter, Liquid level |
11 | JSS-3 Sonic Probe | Travel-time, Equation of time, Amplitude1, Amplitude2 |
12 | JMZD-2D Combined Density Probe | Density, Laterlog Resistivity, Natural Gamma, SP, Caliper |
13 | JZZ-3 Neutron & Gamma Probe | Natural Gamma, Porosity |
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