Title : Ensuring consistency and quality assurance of PVT laboratory data for optimal reservoir management
Abstract:
Accurate analysis of the PVT data will enhance the effective management of reservoirs, determine the quantity and the quality of produced fluids and assure correct design of surface facilities. So, the PVT data from the laboratory must be checked for accuracy, consistency, and validity. High quality, accurate PVT data can reduce uncertainty in reservoir fluid properties, provide a sound foundation for reservoir engineering studies and improve investment efficiency. While acquiring sufficient volumes of representative reservoir fluid samples is the first step in obtaining reliable PVT data, understanding and identifying the quality of the PVT data is essential.
In this paper, preliminary and complementary consistency check of PVT laboratory methods was applied on PVT fluid data from an oil well located southeast Libya. The evaluation includes graphical method, recombination and material balance check for well stream composition test, Buckley, Hofman plot, Y- function of constant composition expansion (CCE) test, compositional material balance of differential liberation (DL) test, overall mass balance for density, Bo and GOR of differential liberation (DL) test and density check for separator test. After implementing these procedures, results confirm that the sample is suitable as a representative for the entire reservoir
