Signature analysis of abrasive-resistant gas separators under conditions of field and bench test

Methods of stimulating production by permeability increasing (due to fracturing and acidizing) and pressure drawdown (by lowering the bottom hole pressure in the well) are widely practiced. It can cause the significant increasing of mechanical impurities concentration in the producedfluid [1, 2]. Examples seem to indicate [3-5] that the particulates cause abrasion resistant breakage of the inner side of the separator. In these conditions the separator can be broken up into pieces and low immersible part of the centrifuge can fall on the borehole bottom. After studying the process of the abrasion resistant breakage [6, 7], the new design for abrasive resistance separator was developed [8]. Field test of new separators 5 и 5А in Western Siberia and results of bench test of separational properties are analyzed in the article.
Materials and methods
The properties of abrasive resistant separators and the analysis of their work under downhole conditions were determined by the means of two patented methods of bench test.
Results
Well test of new separators showed that abrasion resistance is the same even whenparticles content more than 1000 mg/l. New separators provide steady operation of the electrical centrifugal pump in the field of the flow at ?vh, 75-78%, taking into account the gravity separation in the upstream.
Сonclusions
According to the results of integrated exploration, developed separators proved their efficiency under downhole conditions, high in gas and sand.