Screen Selection for Sand Control Based on Laboratory Tests

Abstract

Oil and gas production from unconsolidated/weakly-consolidated sands requires a production screen in the hole to inhibit the movement of formation sand and keep the hole open. For open hole completions where the sand control screen directly retains the formation sand, proper screen selection is necessary to provide optimum life and minimum sand passing. Several screen sizing selection criteria are available in the literature such as Saucier, Coberly, Schwartz and others. However, these rules may not always be applicable, especially when premium screens, with metal meshes are used. These screens may use multi layers of wire mesh and its complex shaped pore opening may result in retention performance quite different from wire wrap screen slots. Experimental work has been done on a very fine (d50=115–130 µm) uniform (uniformity coefficient=d40/d90=3) and a non-uniform (uniformity coefficient=ca 7) sands on a series of commercial screens segments. These screens include standard wire wrap and also premium grade screens. The testing consisted of pressure drop measurements and sand retention while the screen is subjected to a fluidized stream of sand. Analysis of the data provides a method of measuring screen performance during and after filter cake bridging/building. Utilizing this data, screen performance, i.e. comparative lifetime and sand passing can be projected based on a maximum a pressure drop across the screen assembly. This analysis method is applicable for any type of screen and formation. Where possible, the results from the experimental tests are compared to prior literature screen selection methods. Graphs of the normalized data allow for a logical selection of the appropriate screen for a given formation sand. Technical Contribution:A new procedure for the selection of production screens applicable to any formationA comparison of the new method with prior literature methodsA comparison of performance of wire wrapped screens and premium screens. Introduction Open hole completions in oil/gas wells have been common practice for the past several years. These wells have generally been long horizontal wells. The many problems and difficulties to get successful completions has been well documented, as many operators have been disappointed with the results. It is now recognized that a successful horizontal open hole completion requires careful analysis of many factors. These are often dependent variables since a selection of a technology or method for either the drilling or completion may limit the use to only a few other interrelated products and services. One of the key factors is to evaluate what type of screen technology may be necessary for sand control. The reservoir conditions usually dictate whether sand control is needed and greatly influence whether the applied technology can be successful. When direct retention of reservoir sands is the likely completion scenario, a good understanding of the capabilities of the various types of screen technology is required. This includes the screen's capabilities to retain the formation sands, and its sensitivity to drill-in-solids based on the optimum drilling fluids, and well completion cleaning additives and methods that may be utilized.

A Strategic Cost Saving Initiative for Dual-Zone Completions in Marginal Fields

“…Gillepse et al 9 suggested the use of different types of screen technology based on the uniformity coefficient, and the size and variation of d50 of the formation sand. Direct retention SAS is not effective when the sand is highly non-uniform, and/or there is too much variability in reservoir sand sizes.…”

“…Gillepse et al proposed that; for premium screens, screen opening could be up to 2.5 times the d50 sand size, while for wire wrap screens, the slot width should not exceed twice the d50 of sand size. Refer to Figure 2: Criteria for Premium (Mesh Screen) Sizing [SPE-64398] 9 . However, it should be emphasized that historical knowledge and experience of the field shall supersede this recommendation; if SAS of other size has been run in this sand in other wells and have provided favourable results over the years.…”

Productivity of Horizontal Wells Completed With Screens

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Guidelines for screen selection, performance evaluations of the screens, laboratory testing procedures, and the design of drilling and completion fluids could be found in the cited references.…”

Numerical Simulations of Sand-Screen Performance in Standalone Applications

“…Sizing of sand-control media for oilfi eld applications has been the subject of many laboratory studies dating back to the early 1900s (Coberly 1937;Suman et al 1985;Markestad et al 1996;Tiffi n et al 1998;Malbrel et al 1999;Ballard et al 1999;Underdown et al 1999;Gillespie et al 2000;Hodge et al 2002;Ballard and Beare 2003;Constien and Skidmore 2006;Williams et al 2006;Ballard and Beare 2006;Mathisen et al 2007;Underdown and Hopkins 2008). Chanpura et al (2010) provide a thorough review of the past work on screen selection for SAS applications.…”