Páginas: 7 (1538 palabras) Publicado: 29 de marzo de 2011
SPE 118073 Proposed Methodology to Predict Electric Power Requirements for ESP Wells in a Heavy Oil Field - A Case Study
Rosmer Brito, SPE, Petroregional del Lago S.A., Jacobo Montero, SPE

Copyright 2008, Society of Petroleum Engineers This paper was prepared for presentation at the 2008 Abu Dhabi International Petroleum Exhibition and Conference held in Abu Dhabi, UAE, 3–6 November 2008.This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, ormembers. Electronic reproduction, distribution, or storage of any part of this paper without the written consent of the Society of Petroleum Engineers is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of SPE copyright.

Abstract This paper describes themethodology used to determine the electric power requirements of all the ESP systems to be installed over a period of study (2007-2017) in the Icotea-Misoa heavy oil reservoir, Urdaneta West field, Venezuela, in order to ensure a reliable and safe electric supply to cover the field development plan. The methodology used consisted in: selection of a representative sample of the ESP wells population; runningseveral sensitivities on the ESP and well performance using an industry proved ESP software for the most critical cases of reservoir, equipment and production conditions; tabulate and analyze the data obtained from the simulations with statistical techniques to determine the most probable electric power requirement range as well as its tendency over time; finally, generate relationships betweenthe electric power consumption and different production parameters (total production rate, oil and water production rates, reservoir pressure, productivity index and sand production) to predict the power requirements changes with time. The results will be used by the operating company to decide whether the existing surface electrical facilities are sufficient for the field development plan, or if aKVA capacity expansion is required. One of the main conclusions from the study was that the required electric power capacity was being overestimated, based on simple predictions using only historical consumptions or non-statistical methods. The methodology applied led to a more reliable prediction of the power consumption per well. This will allow the company to better estimate the requiredfacilities and hence, reduce the expected costs of investment required.

Introduction Petroregional del Lago S. A. (abbreviated PERLA) is a joint venture between Petroleos de Venezuela S.A. (PDVSA) and Shell International Exploration and Production (60% and 40% shares, respectively). The company operates the Urdaneta West Field, located in Maracaibo Lake in western Venezuela. The field has threeproducing reservoirs, with very different geological characteristics and well types. One of these reservoirs is the Icotea-Misoa reservoir, which is composed by Eocene and Miocene formations, consisting of unconsolidated sands and containing very significant reserves of heavy oil. The main characteristics of the Icotea-Misoa reservoir and wells are summarized in Table 1 and Table 2. This study wasfocused on the prediction of the electric power requirement for the wells with Electric Submergible Pumps (ESP) of the Icotea-Misoa reservoir over the period 2007-2017, as part of the decisions to be made in the field development plan, which included the objective of determining a reliable and safe electric power supply infrastructure for the field. The electric power required by the field,...
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