doctoralThesis
Métodos estatísticos recursivos aplicados ao problema de estimação de vazão de gás em plantas de Plunger-lift
Fecha
2013-08-23Registro en:
MIRANDA, Fernando Cesar de. Métodos estatísticos recursivos aplicados ao problema de estimação de vazão de gás em plantas de Plunger-lift. 2013. 107 f. Tese (Doutorado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Miranda, Fernando Cesar de
Resumen
This work has as main objective to find mathematical models based on
linear parametric estimation techniques applied to the problem of calculating
the grow of gas in oil wells. In particular we focus on achieving grow models
applied to the case of wells that produce by plunger-lift technique on oil rigs,
in which case, there are high peaks in the grow values that hinder their direct
measurement by instruments. For this, we have developed estimators based
on recursive least squares and make an analysis of statistical measures such
as autocorrelation, cross-correlation, variogram and the cumulative periodogram,
which are calculated recursively as data are obtained in real time from
the plant in operation; the values obtained for these measures tell us how
accurate the used model is and how it can be changed to better fit the measured
values. The models have been tested in a pilot plant which emulates
the process gas production in oil wells