This paper describes a methodology for classification of artificial-lift-system (ALS) failures and addition of a commonly used root-cause failure classification. This methodology was applied to different ALSs such as beam pumps (BPs), progressing cavity pumps (PCPs), electrical submersible pumps (ESPs), and electrical submersible progressing cavity pumps (ESPCPs). The starting point was the definition of the boundaries of each system. Then, each job in the well was defined as (1) a failure, (2) a failure, non-ALS, or (3) no failure, in order to look for ways to improve run life.
La Cira-Infantas oil field is in the Middle Magdalena Valley in Colombia (Fig. 1 above). The vast majority of the wells are completed with 7-in. production casing and perforated with 5 shots/ft with no sand-control completion in place, and then the ALS is installed.
From the beginning of the activity in La Cira-Infantas, almost 100 years ago, several ALSs have been used to produce fluids from the wells. Since 2005, the field has offered different conditions, depending on the mature state of the waterflooding—high water percentage, high and low flow rates, free gas, and corrosive fluids.
Currently, ALSs such as BPs, PCPs, ESPs, and ESPCPs are used for producing the total fluid of the field....
Run-Life Improvement by Implementation of Artificial-Lift-Systems Failure Classification
20 June 2016