Application Flexibility of Jet Pump – Unconventional Method for Offloading a Sidetracked Well and Reactivation of Inactive Well using Jet Pump

Abstract

This paper presents the analysis and results of the Jet Pump (JP) applications in the two oil fields: Well -A, for customer in U.A.E, and Well-B for customer in Oman. Well-A was a deviated well with 3-1/2-inch single string completion. The tubing-string was equipped with three Side Pocket Mandrels (SPM). Based on preliminary screening for Artificial Lift Systems (ALS) against the provided well data, the jet pump system was found the most suitable ALS method. Jet pump was evaluated for its efficiency in reviving a dead well with rig less installation using Jet Evaluation and Modeling Software (JEMS). Thus, a reverse circulation JP was straddled across the last SPM in the tubing using two tubing packers. The power fluid was then injected through casing which entered the JP to create the drawdown required to bring the formation fluid through tubing to the surface. The dead well was produced successfully at different injection pressures and rates for four months. The production results were compared to the theoretical model of JEMS to assess the JP performance.

The Well-B was a newly side tracked well where customer intended to use a jet pump for offloading the kill fluid of well from its last zone. A 2-7/8-inch bottom hole assembly of JP was run at 9,348 ft depth during the well completion. Jet pump was freely dropped in the well to offload the kill fluid and revive the production. Rig pump was used to inject power fluid at high pressure in the tubing and returned fluids were taken from the annulus. Constant samples of produced liquid were taken to ensure the kill fluid has been offloaded and the reservoir started contributing its fluid. Jet pump was retrieved with the help of slick line once satisfactory results were received at the surface. The well was successfully offloaded at around 900 bbl. of gross fluid using JP technology.