Caliper Logging Services For Oil, Mining
And Geothermal Survey

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Caliper logging is a type of downhole survey that is used to measure the diameter of a wellbore. The tool used for Caliper logging is called a Caliper, which is a device that is lowered into the wellbore on a wireline or conveyed on a drilling assembly. The Caliper has arms that can be opened or closed to fit the diameter of the wellbore. The measurement is taken by comparing the distance between the closed arms to the diameter of the wellbore.

What Does Caliper Logging Measure?

Caliper logging measures the diameter of the wellbore. Caliper logging can measure the diameter of the wellbore in several different ways, such as:

  • Contact method: the arms of the Caliper tool make physical contact with the wellbore and measure the diameter by the distance between the arms.
  • Non-contact method: the tool uses sensors such as ultrasonic or optical to measure the diameter of the wellbore without making physical contact.
Caliper logging can also provide information on the condition of the wellbore such as the presence of ledges, washouts, keyseats, and other features that could compromise the good integrity. Caliper logging data is also used to identify any changes in the wellbore’s diameter caused by factors such as borehole collapse or formation breakouts, and to detect any other wellbore abnormality. This information is used to help guide the drilling process, ensure the wellbore stays on target, and determine the location and orientation of hydrocarbon-bearing formations.
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What Is Caliper Logging Used For?

Caliper logging is used for a variety of purposes in the oil and gas industry and in geothermal and mining drilling.
Some of the main uses include.

Wellbore Mapping:

Caliper logging is used to determine the size and shape of the wellbore, which is important for wellbore navigation, drilling optimization and maintaining wellbore stability.

Detecting Wellbore Abnormalities:

Caliper logging can detect various wellbore abnormalities such as ledges, washouts, keyseats, and other features that could compromise good integrity.

Well Integrity Check:

The Caliper log data is also used to evaluate the condition of the well and detect any signs of damage or deformation, which can cause well integrity issues.

Formation Evaluation:

Caliper logging can be used to identify the presence and orientation of hydrocarbon-bearing formations, which can help in the exploration and production of oil and gas.

Drilling Optimization:

Caliper logging can be used to optimize drilling parameters such as weight on bit, rotary speed, mudflow, and mud properties, to improve the drilling efficiency and reduce the risk of wellbore instability.

Completion Design:

Caliper logging is used to design the completion string and select the appropriate size of the casing and tubing, in order to ensure a proper fit and avoid wellbore collapse or other issues.

Exploration And Mining Drilling:

Caliper logging can also be used to identify the presence of different formation types and aid in the exploration of mineral deposits in mining drilling.