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Title: Custody Transfer Crude Oil Sampling Systems
Author: Dominic Giametta
Source: 2017 International School of Hydrocarbon Measurement
Year Published: 2017
Abstract: In the oil and gas industry, there are generally two ways that we take measurements of product. The first is by volume. As fluid flows through a pipeline or sits in a tank, the industry has developed many ways by which we can capture that fluid and calculate how much of a particular product we have. These methods are calculated and refined to the point that we can determine these volumes down to the lowest possible unit. The second method by which we measure fluid is a quality measurement. Quality measurement has been well refined over the years to include new technologies not seen in the past. Electronic devices are very commonly used to provide real time analyzation of product as it flows through a custody transfer system. Although there have been many advances in the electronic quality measurement realm, another of the most common and widely accepted method of quality measurement is the composite sampling system. These systems incorporate the use of mechanical devices that capture small bites of the flowing product to compile a composite sample that is representative of the flowing batch. In crude oil sampling, these devices are used almost religiously to provide a primary source of measurement, or even a redundancy to an electronic system. In either scenario, there are certain considerations one should entertain in order to ensure that the composite sampling system is set up for success.

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