Gamma Ray Logger

The Gamma Ray Logger records the natural gamma radiation emitted by recovered reservoir core along its length, giving both a total gamma count and a spectral analysis. Core laboratories use the profile to match core depth to the wireline gamma ray log, to correlate core with logs and to flag clay-rich and organic intervals before sampling.

How it works

Whole or slabbed core up to 5.5 inches in diameter is laid on a 4 meter belt that carries it past a shielded sodium iodide detector measuring 3 by 3 inches. Shielding of 5 and 3.7 cm surrounds the crystal. The belt advances the core at a variable logging speed of up to 2 feet per minute while the detector counts over a set interval, so scan position and count interval are the controlled variables. The output is the total gamma-ray response and the spectral response as a function of position along the core, which can be plotted against the wireline log for depth matching.

The system operates on 230 VAC, 50/60 Hz, single phase. Sample size and instrumentation are set for each project, and a product data sheet (GAMMA LOGGER.PDF) is available for download on the product page.

What is included

• Conveyor belt, 4 meters long, for core up to 5.5 inches
• Sodium iodide detector, 3 by 3 inches, with 5 and 3.7 cm shielding around the crystal
• Variable logging speed, up to 2 feet per minute
• Power supply for 230 VAC, 50/60 Hz, single phase

Specify for your project

• Core diameter, and whether whole or slabbed core will be logged
• Core length per run and required throughput
• Logging speed and count interval for the resolution needed
• Total gamma only or spectral output
• Instrumentation and data output, stated in the project datasheet
• Site power, 230 VAC 50/60 Hz single phase

This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.

Features

• Belt length: 4 meters
• Suitable for core: up to 5.5''
• Shielding area: 5 & 3.7 cm around the crystal
• Sodium iodide detector: 3" by 3"
• Variable logging speed: up to 2 feet/min
• Power supply: 230 VAC 50/60 Hz 1 phase

GAMMA LOGGER.PDF