Production Optimization Gassy & Sandy Well By Using Helical Diptube Gas Anchor

Abstract

Mature Field had some problems in Operation and Production, especially Wells with Sucker Rod Pump. Field’s problems that mostly occurred were gas interference and sand problem, sometimes these problems happened simultaneously in one Well. Gas Interference and sand problem could be fixed by the different tool, gas interference used Gas Anchor and sand problem used sand screen or desander.

In order to reduce Well Service activity for wells that had problems with gas interference and sandy well, the Authors modified the tools by combining the Gas Anchor and Desander. To optimize the separation, the Authors added a suction pipe (dip tube). The first step was calculating a minimum length of the dip tube and the Desander whorl. The next was fluid flow simulation in the Desander whorl. From the simulation, the optimum length of the whorl was known to form the vortex flow at the end of  Desander. Vortex flow used for sand and fluid separation with the utilization of their density difference with the centrifuge force, sand with the higher density would fall at the end of the vortex and went down to the Mud Anchor.

The design that got from the calculation and simulation was fabricated to validate of the result. The wells that used this down hole equipment could survive 87 days longer than usual. Pump efficiency increased up to 14.2 %.