What is it?

Slimhole logging, also known as wireline logging, is an important facet for the field of logging. Since its capabilities were first realised in 1927, it has been gradually developing and burgeoning within the field. Its importance cannot be undermined as it is capable of reaching down into tight crevices that have previously been difficult to access. The necessity for a small opening is so that there’s little to no disruption to the surrounding area, yielding more accurate results.

Who Uses It?

Typically, slimhole operations are undertaken by those in the oil and gas industry where a well intervention is required. Well intervention, also referred to as well work, is a process or operation carried out on an oil or gas well during or at the end of its productive life. This alters the state of the well and well geometry, or either, providing well diagnostics or managing the production of the well.

What Tools Are Used?

Some of the tools required for slimhole logging include:


The tool that is lowered into the well to help determine its contents i.e. resistivity and natural properties.


Utilised in many different industries, a winch is a great asset for the lifting or lowering of many items that are inaccessible by hand.

Surface Unit and Software

The machine will help to determine the readings that the probe is picking up. Usually operated by analysts who then collate the findings.

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