Improvement of the Process Ensuring the Uniformity of Oil and Oil Product Volumetric Moisture Content Measurements

摘要

The amount of recovered and treated oil is determined in accordance with the requirements of regulatory documents with the application of various methods and instruments. One of the monitored parameters at the stages of oil production, gathering, treatment and transportation is the moisture content which can be determined with the use of laboratory and in-flow methods. In-flow measuring instruments with high accuracy characteristics operating within the flow range of up to 100% of volumetric moisture content have become widely spread in the oil production and processing industry. A system of standards has been established in the Russian Federation in order to provide the required accuracy of in-flow moisture meters, which allows conducting testing, standardization and monitoring the metrological characteristics of in-flow moisture meters. The article features a description of the State primary special standard of oil and oil product volumetric moisture content unit GET 87-2011, the results of its metrological characteristics study, and the definitions of factors influencing the accuracy of the volumetric moisture content unit's reproduction. An international standard describing the procedure of transferring the unit size from the State special standard to working instruments has been developed in order to improve the the procedure of volumetric moisture content unit transfer. The establishment of the standard and the development of the state verification schedule resolves the issue of ensuring the uniformity of measurements of oil and oil product volumetric moisture content, and provides traceability of working instruments (in-flow moisture meters) to the superior standard.