The number of samples required is a function of the formation heterogeneity. Samples should be representative of the interval under consideration.
1.2 Formation sand analysis 1.2.1 Sampling ♾ncourage operators to challenge established practices and field test in a structured way new approaches to sand control.
Provide a summary of current "best" practices.
Despite all the efforts of the past the industry has been unsuccessful in uniquely identifying optimum gravel packing procedures. The requirements for a successful gravel pack are to reduce sand production to a tolerable level whilst minimising productivity impairment.The emphasis today is to optimise gravel packing methods with the prime objective of minimising productivity impairment. Well damage of this magnitude is often unacceptable in terms of deferred production and energy losses in the production system. However recent tests have highlighted that this damage, when expressed as Productivity Index reduction, may be of the order of 50-80%. Some reduction in well productivity as a result of gravel packing has long been recognised, and accepted by many companies as being a price to be paid for sand control. 1 General gravel pack design considerations 1.1 What is a successful gravel pack?Įffective sand control was long considered to be the main measure of success for a gravel pack and current procedures allow this objective to be achieved with confidence for most applications. The latter objective was more difficult to achieve as gravel packing is still being developed through extensive research and field trial programmes. To promote a common and consistent approach to gravel packing within the Group.To provide all the required information for designing a mechanical sand control completion, Two main objectives were pursued when preparing this chapter: Special sand control applications including horizontal wells, fracpacking, and the Auger system.non-gravel packed screens and external casing packers. Other mechanical sand control methods i.e.Post-gravel pack operations and remedial treatments with special emphasis on through tubing techniques.Internal Gravel Packing (IGP) and External Gravel Packing (EGP), and the various gravel packing systems presently available. This article describes mechanical sand control methods and covers the following topics:
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