A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth [1] and is commonly used in hydrocarbon exploration.

The Caliper Log is a tool for measuring the diameter and shape of a borehole. It uses a tool which has 2, 4, or more extendable arms. The arms can move in and out as the tool is withdrawn from the borehole, and the movement is converted into an electrical signal by a potentiometer. In the two arm tool (Fig. 9.1), the borehole diameter is measured.

Caliper Logs play a critical role in ensuring the safety, efficiency, and longevity of oil and gas wells. By providing detailed insights into the shape and condition of the wellbore, they help optimize production, detect potential problems, and guide decision-making throughout the …

2017年8月24日 · This document discusses caliper logs, which measure the size and shape of a borehole. It describes different types of caliper tools, including multi-finger, dual caliper, and ultrasonic caliper tools. The document explains that caliper logs provide information about borehole shape and volume, mud cake buildup, lithology, and cement volume.

2020年6月10日 · The Caliper Log is a tool for measuring the diameter and shape of a borehole. It uses a tool which has 2, 4, or more extendable arms. The arms can move in and out as the tool is withdrawn from the borehole, and the movement is converted into an electrical

2025年3月7日 · The caliper log is a simple, straightforward, and informative wireline-borehole method. Using one or more tensioned-mechanical arms, caliper tools can continuously measure and record the size and/or shape of a borehole over its length.

1. n. [Drilling] A representation of the measured diameter of a borehole along its depth. Caliper logs are usually measured mechanically, with only a few using sonic devices. The tools measure diameter at a specific chord across the well.

This document provides information about caliper logs, which measure the diameter of a borehole along its depth. It discusses how caliper logs work, the field procedures for conducting them, challenges like borehole spiraling, best practices like using multi-axis calipers, potential pitfalls like unstable boreholes, and references for further ...

2019年5月31日 · 1.2.2 Caliper logs provide useful information for borehole completion and testing and are commonly used to assess borehole diameter, shape, roughness, and stability; calculate borehole volume; provide information on borehole construction; and delineate lithologic contacts, fractures, and solution cavities and other openings.