GEOPHYSICAL FOR EXPLORATION

Borehole Logging:

• Borehole logging is conducted to gather detailed information about the geological and geotechnical properties of the subsurface.
• The primary objectives include assessing rock and soil types, identifying geological structures, determining water content, and measuring physical properties such as porosity and permeability.

Gamma Ray Logging:

• Measures natural gamma radiation emitted by the surrounding rock formations.
• Useful for identifying lithology, distinguishing between different rock types, and detecting the presence of radioactive minerals.

Electrical Resistivity Logging:

• Measures the electrical resistivity of the surrounding rocks.
• Measures the electrical resistivity of the surrounding in disposal to identify soft materal zone.
• Provides insights into the composition and moisture content of the subsurface, aiding in hydrogeological and geotechnical analyses.

Acoustic Logging:

• Utilizes sound waves to measure the acoustic properties of rocks.
• Assesses rock density, porosity, and the presence of fractures, providing valuable information for geotechnical stability assessments.

Caliper Logging:

• Measures the diameter of the borehole to identify variations in hole size.
• Essential for evaluating borehole stability and assessing the quality of the borehole wall.

Neutron Porosity Logging:

• Measures the neutron absorption properties of the subsurface.
• Provides information about porosity and moisture content, aiding in groundwater studies and reservoir characterization.

Downhole Tools and Instruments:

Logging Tools:

• Logging tools are lowered into the borehole to collect data at various depths.
• Tools may include gamma ray probes, resistivity sondes, acoustic sensors, and other specialized instruments.

Wireline Logging:

• Wireline logging involves the deployment of logging tools on a cable (wireline) that can be raised and lowered through the borehole.
• Allows for efficient data collection at multiple depths without the need to pull the entire tool string out of the borehole.

GEOPHYSICAL FOR GEOTECH SUPPORT

Geo-Electricial for Disposal Area:

• Measured the electrical resistivity of disposal areas, focuses to identify soft materal zone and displacement potensial.

Geo-Electricial for Drain Hole:

• Measured the electrical resistivity of pit area, focuses to indentify low resistivity. Low resistivity is akuifer target for drain hole.