Integral Analysis of Artificial Lift System in Heavy Crude Oil, South Monagas Fields

Juan C. Brown and Pilar Lozano, PDVSA EyP. 

Abstract 

A new procedure using an integral analysis was implemented for the optimization of heavy crude oil wells that were produced by Gas-Lift, allowing an increase in production. Also, under this procedure selected changes in production methods were performed; specifically, sucker rod pump and progressive cavity pumps (PCP) were changed to Gas-Lift. The purpose of this modification was to reduce the costs associated with services and the use of diluent to improve the lifting process. 

The results obtained by the application of this new procedure can be summarized as an increase in average production, from 206 to 531 Barrels per day. This increment was mainly due to the optimization of 75 oil wells by Gas-Lift, resulting in a associated gain of 10760 BOPD. The number of well services was notably reduced. The production methods of 25 wells were changed from sucker rod pump and progressive cavity pumps to Gas-Lift. Likewise with this modification a production gain of 3410 BOPD was obtained, which added to the gain obtained from Gas-Lift wells, it totalize 14170 BOPD. The applications perform during the process were optimization of the production and the gas lifting consumption in developed fields and improvements in completion design of Gas-Lift. This paper presents verified information useful in the development of heavy crude sites in Gas-Lift. Likewise, as a result of the experience obtained, various innovations were introduced with success, which translated into an increase in production and cost reductions.

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