Abbreviation for basic sediment and water. BS&W is measured from a liquid sample of the production stream. It includes free water, sediment and emulsion and is measured as a volume percentage of the production stream.
LABORATORY BS&W STANDARDS
BS&W is determined using ASTM Standard D96, D4007 or the API Document "Sediment and Water", Chapter 10, Section 2, 'Determination of Water and Sediment in Crude Oil by the Centrifuge Method".
Other methods available for water in crude oil are ASTM D4377, D4928, IP386.
1. BS&W shows to the customer the amount of crude feedstock which should be accounted into "losses" prior to any processing.
WATERCUT MONITOR DEFINITION
A water cut meter measures the water content (cut or percentage) of a specific product as it flow through a pipeline. The analyzer measures the differential flow characteristics of water and other components of the liquid to determine the percentage of water. Water cut meters are typically used in the mineral oil industry to measure the watercut of oil flowing from a well, produced oil from a separator, crude oil transfer in pipelines and in loading tankers. There are several technologies used. The main technologies are capacitive measurements, mircrowave dielectric measurements and NIR measurements.
EASZ-1- Online Water Oil Measurement Introduction
NET OIL COMPUTER
A Net Oil Computer is used to determine net oil, net water, BS&W content, and net gas produced in a well test or similar operation.
A minimal application would monitor the Emulsion Stream of a crude oil. By definition, an emulsion has the gas phase separated from the stream. A typical application will monitor the emulsion stream and free water stream to collect the volume of "Gross" Oil and "Net" water. The design application will monitor the three phases of a crude oil using meter inputs, temperature sensors, a pressure sensor, and a Basic Sediment and Water "%BS&W" monitor for "Gross" and "Net" volumetric data collection. Gross volumes are determined by meter input using the pulses per unit volume and the meter correction factor input.
For "Gross" Emulsion Oil and Emulsion Water data collection the "NOC" requires an input from a flow meter and a "%BS&W" monitor. The gross volumes are determined as above and the "%BS&W" is used to determine the gross Oil and Water volume in the Emulsion Stream.
The Net Oil Computer is designed to operate with a bs&w and can be used with other devices that output a 4-20ma signal representing "%BS&W"
CRUDE OIL SAMPLING FOR BS&W
Sampling crude oil for custody transfer, fiscal, allocation or quality measurement purposes should be performed in accordance with sampling standards of ISO 3171, ASTM D 4177, API 8.2 and IP 6.2. These standards dictate a number of key design issues and steps that must be considered to ensure a system fully complies with the standards.