This paper presents a combined experimental and numerical-modeling study on sand-screen performance. The objective is to develop an improved methodology for optimal sand-screen-aperture selection by addressing some of the limitations present in existing sand-retention tests. A new sand-retention-test facility has been developed that incorporates a number of improvements into the design and experimental procedure.
Empirical criteria have traditionally been applied for selecting screen size on the basis of one or two parameters derived from the particle-size distribution (PSD). Because of the problems associated with the empirical criteria, the industry standard practice is to conduct laboratory sand-retention tests on screen coupons. This is particularly relevant for premium sand screens, the filter media of which are fundamentally different from those of a slotted liner or wire-wrap screen. The same mechanisms for forming stable, multiparticle bridges may or may not be applicable. In most cases, the cross-sectional path through these filter media is tortuous and 3D. Laboratory sand-retention testing is typically required to determine the effective screen opening size. There are no universal industry standards on how sand-retention testing should be performed or results interpreted. Sand-screen performance is often evaluated on the basis of two criteria: screen plugging and sand retention.
Limitations of the Existing Approach. While the acceptance criteria for sand production and produced-particle size are well-defined and these factors are relatively straightforward to measure, screen plugging is defined differently by different investigators. There is currently a lack of measurements that can be used to accurately quantify screen plugging and screen permeability....
Evaluating Sand-Screen Performance With Sand-Retention Tests and Numerical Modeling
10 September 2016