This article describes mechanical sand control methods and covers the following topics: ·Gravel packing techniques i.e. Internal Gravel Packing (IGP) and External Gravel Packing (EGP), and the various gravel packing systems presently available. ·Post-gravel pack operations and remedial treatments with special emphasis on through tubing techniques. ·Other mechanical sand control methods i.e. non-gravel packed screens … Mechanical sand control methods

It has been established that the preparation of HEC based gravel-pack slurries is critical to the performance of the gravel pack. It has also been shown that many techniques presently in wide use lead to numerous quality problems not all of which are readily apparent. The cleanliness of the well bore and of all the … Recommended procedure for preparation of hec gravel-pack slurry

Examples of internal gravel packing procedures are given below. These programmes contain specific information which may only be relevant for a particular field, and hence may require to be adapted for use in other areas. *1 Workstring cleaning procedure Cleaning the wellbore is often difficult and because all wellbores seem to be unique in this … Internal gravel packing procedures

This article describes the procedure for conventional external gravel packing. 1.With the liner set and the gravel pack tool in the circulating position establish circulation at 0.5-5 bbls/min.   2.Commence adding gravel at ± 1/2sack per min (i.e. ± 1/8sack/bbl). 3.Having reached 80-85% of theoretical fill (or earlier if pressures indicate) reduce the gravel concentration … External gravel packing procedures – Conventional gravel packing

Substantial gains can be made by deferring or avoiding the installation of downhole sand control. Implicit in this, is the acceptance that sand will arrive at surface and that the processing facilities can remove this effectively, without placing undue constraints on production capacity and uptime. It is a simple statement, but the bare facts are … Sand removal and monitoring equipment

This article describes the sampling analysis procedure for sand control: conventional and side stream filtration method. 1 Conventional procedure By passing the oil sample through a sieve of a given size the sand particles can be separated from the oil and collected. The sand particles collected can be measured and related to the size of … Sampling analysis procedure – sand control

 This article describes 3 tests: dry spray test, submerged spray test and full operational test. Dry spray test This test is conducted on an empty vessel with the manways uncovered to observe the system performance. The aim is to demonstrate the success of the three factors of the design: equal water flow from each nozzle … Test procedure for sand wash systems

These example procedures are based on a balanced rotationally locked washdown system. –   The following procedures assume the open hole horizontal section to have been drilled with sized  calsium carbonate in polymer / brine based fluid. –   It should be considered to condition the open hole section by a wiper trip prior to pulling out … Installation procedure for Prepacked Screens in Horizontal Open Hole Section

This article gives an example of completion design with IGP (Internal Gravel Pack) inside a 9 5/8″ production casing set through a deviated reservoir (approx. 40 degrees). The most important equipment parts which will be used and the design requirements to the same equipment are presented below. 1 Gravel Pack Base In cased hole, permanent … Design Gravel Pack Liner for Deviated Wells

This article gives an example of completion design for a  “Slim-pack” prepacked screens, run barefoot in a horizontal 8 1/2″ reservoir section. The most important equipment parts and the design requirements are presented below. 1. Double “V”-Set Shoe The double V-Set Shoe is designed for open hole completions. The design features a one way system … Desing Prepacked Screens Liner for horizontal Wells