What is sand control?



1. n. [Well Completions] The installation of equipment or application of techniques to prevent migration of reservoir sand into the wellbore or near-wellbore area. In weak formations, sand control may be necessary to maintain the structure of the reservoir around the wellbore.

Why is sand control important?

The unconsolidated sand is the one which trapped in the environment with insufficient cementing agents. This kind of sand has high porosity and permeability due to weak consolidation. Therefore, sand control is necessary for this kind of sand formation.

What are the sand control techniques?

Possible methods that should be considered are:

  • Restricting of production rate. The idea is to reduce the drag force due to fluid velocity. …
  • Increasing flow area. …
  • Selective perforating. …
  • In-situ sand consolidation techniques. …
  • Resin-coated gravel pack. …
  • Mechanical methods.





How is sand production controlled?

The Gravel pack controls sand production by placing filters of gravel grains that keep the sand grains in the filter. The optimal size of the gravel is proportional to the size of the grains in the sand. The Gravel pack is typically coiled and can be placed in wells with wall pipes or open wells.

What is passive sand control?

Maintenance and workover is a passive approach to sand control. This method basically involves tolerating the sand production and dealing with its effects, if and when necessary. Such an approach requires bailing, washing, and cleaning of surface facilities routinely to maintain well productivity.

What is sand control in oil and gas industry?

1. n. [Well Completions] The installation of equipment or application of techniques to prevent migration of reservoir sand into the wellbore or near-wellbore area. In weak formations, sand control may be necessary to maintain the structure of the reservoir around the wellbore.

What causes sand production?





The internal causes of sand production from the reservoir are the stress state of borehole wall rock and the tensile strength of rock (affected chiefly by consolidation strength of rock), whereas external causes are the producing pressure drawdown value and the change in reservoir fluid pressure.

What is the percentage of sand control by resin injection?

Clarification: The percentage of sand control by resin injection is 10%. This method entails the introduction of three families of synthetic polymers – furans, epoxies, and phenolics – into the sand surrounding the wellbore.

What is sand consolidation?

1. n. [Well Completions] A means of controlling the undesirable production of sand from weak sandstone formations. Sand consolidation chemically binds the grains of sand that make up the formation matrix while maintaining sufficient permeability to achieve viable production rates.

What is gravel packing?

Gravel packing is a sand-control method used to prevent the production of formation sand. Gravel packing is used in conjunction with hydraulic fracturing, but at much lower pressures. Formation sand is produced from the breakdown of formations where wells are located.

What is sand exclusion?

Sand exclusion is a more widely used type of sand control method due to its ability to act as a mechanical barrier to the sand production. It is important to take into account of the type of well and its completion in order to successfully design the sand control methodology.



What is the main purpose of well completion?

Well completion is a series of steps–depending upon the completion method–performed after the drilling and casing phase, that enable to well to produce hydrocarbons. The primary goals are to stimulate the well to maximize production, and running tubing to enhance the well’s lifespan and ease of maintenance.

How will you proceed in predicting whether a well will produce sand or not?

Intro to Sand Control

How will you proceed in predicting whether a well will produce sand or not?

The most sophisticated approach to predicting sand production is the use of geomechanical numerical models developed to analyze fluid flow through the reservoir in relation to the formation strength.

What is gravel packing a well?

Gravel packing is a sand-control method used to prevent the production of formation sand. Gravel packing is used in conjunction with hydraulic fracturing, but at much lower pressures. Formation sand is produced from the breakdown of formations where wells are located.

Can you put gravel around a well?

DO NOT use any well coverings. Even though the sight of your wellhead may not be your favorite thing, you should not cover it up with any fake rocks, gravel, treated wood, or wishing wells.



How does sand get into a well?

Well Pump is Too Large



In some cases, the well pump can be too powerful or strong for the well and consequently pulls sand in from the surrounding aquifer. This sand can cause a rapid deterioration in the pump’s valves and cause a build-up of sand at the bottom of the well, which can lead to sand in your water lines.