Calcium Chloride uses in drilling mud

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Calcium Chloride uses in drilling mud

Calcium Chloride is used in drilling mud with powder or flakes appearance to to supply Calcium ions. Calcium Chloride is one of the drilling fluids weighting agents. It can adjust the activity of the water phase in invert-emulsion mud.

Advantages of Calcium Chloride usage in drilling mud over other weighting agents, is its low price in formulation of solid-free completion brines.

The maximum density obtainable is 11.6 Ibm/gal (SG 1.68) with the addition of Calcium Bromide. Calcium Chloride and other brine completion fluids, eliminate plugging of producing sands often encountered when perforations are made through drilling mud. These brine fluids, free of solids, eliminate the problem of cracking, solidification and settling of solid materials on packers.

Calcium Chloride is used to control the activity of oil-based mud and work over/completion fluids. It is also an effective means of providing high Chloride ion concentration levels in the aqueous phase of mud for balanced activity mud systems, for maximum shale stability.

CaCl2-containing drilling mud can be used in high pressure formations.

It is much easier to dilute this material in water and has the ability to absorb dust from drilling operations inside the well.

Calcium Chloride cement in Oil and gas drilling

Calcium Chloride in cementing oil and gas wells as a completion fluid and accelerator by adding to cement or water, can significantly reduce the thickening time and half-thickening time of the slurry.

Hydration of cement is a basic chemical reaction that several factors such as temperature, molecular rate of movement have a direct effect on its speed. If the hydration of cement slurry is slowed down, it will eventually take more time for cement to form. As a result, the compressive strength of cement does not reach the appropriate value. Compressive strength is a vital factor in preventing lost circulation in drilling fluids. This compressive strength in cement is also considered as a support for wall pipes.

This compressive strength in cement is also considered as a support for casing pipes. As mentioned in the previous section, CaCl2 is a weighting agent that Helps add density to drilling mud. In addition, drilling mud with the help of Calcium Chloride powder can overcome formation pressure. These are the benefits of adding a suitable accelerator such as Calcium Chloride, which can solve these problems in many wells.

Calcium Chloride is the most economical accelerator for use in drilling cement. This drilling additive reduces drilling costs due to its reasonable price and saves process time.

Disadvantages of Calcium Chloride uses in drilling mud

Ordinary Calcium Chloride drilling mud is not suitable for wall pipe cementing in low temperature conditions. Because the low temperature of these wells slows down the hydration of cement slurry, which ultimately causes the cement to form later and the inability to resist formation pressure.

Calcium Chloride has been used as an accelerator additive for many years, but this additive in low temperature conditions not only cannot reduce the thickening time of cement slurry, but also has adverse effects on other properties of the slurry. To solve the problem of setting the cement slurry, an additive should be used that has very fine particles.

Effect of Calcium Chloride mud on the environment

Calcium and Chlorine are chemicals that are widely used in drilling mud, which are added in different forms such as Sodium Chloride, Calcium Carbonate, etc. The effect of Calcium Chloride mud on the environment and soil properties is undeniable. Calcium and chlorine in high concentrations are toxic to plants.

If these chemicals are used with high concentration in the drilling process and the waste is left in the environment, it will lead to contamination of the soils around the drilled wells.

To investigate the effects of this material, it is necessary to test the soils around the drilling area and compare it with the virgin soils of that area. In areas where drilling waste is released into the environment, the amount of Chloride and Calcium in the soil around the reservoir oil wells is high compared to the standard soil in the area.

Also, by performing these experiments at different depths, the amount of contamination in these depths can be examined.

As the amount of soluble salts in the soil increases, the osmotic pressure increases and as a result, water absorption by the roots becomes difficult and the plant’s resistance decreases.

Most trees and plants are sensitive to chlorine. The presence of Calcium and Chlorine causes plant poisoning. Sensitivity and burns appear in plants when the amount of Chlorine exceeds 0.3% of dry matter.

Reducing the effects of calcium chloride mud on the environment

The following solutions are proposed to Reducing the effects of calcium chloride mud on the environment and improve the soil condition of the areas around oil and gas wells:

Drilling wastes should be prevented from entering the environment.

The soil type of the area should be examined before producing drilling mud. As a result, according to the type of soil, less Calcium and Chloride compounds can be used to regulate the desired properties in drilling mud.

In order to improve the contaminated lands, it is possible to plant suitable plants that are resistant to salinity and leaching of the soils of the region.

To improve soils contaminated with Calcium Chloride and similar salts, selecting a suitable plant for cultivation in regional soils is one of the main strategies. For this purpose, plants can be used that are resistant to salinity or alkalinity of the soil. These plants are resistant to oil well drilling wastes in soils contaminated.

Related Article: Calcium Chloride use for deicing

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Calcium Chloride is used in drilling mud with powder or flakes appearance to to supply Calcium ions. Calcium Chloride is one of the drilling fluids weighting agents. It can adjust the activity of the water phase in invert-emulsion mud.

Advantages of Calcium Chloride usage in drilling mud over other weighting agents, is its low price in formulation of solid-free completion brines.

The maximum density obtainable is 11.6 Ibm/gal (SG 1.68) with the addition of Calcium Bromide. Calcium Chloride and other brine completion fluids, eliminate plugging of producing sands often encountered when perforations are made through drilling mud. These brine fluids, free of solids, eliminate the problem of cracking, solidification and settling of solid materials on packers.

Calcium Chloride is used to control the activity of oil-based mud and work over/completion fluids. It is also an effective means of providing high Chloride ion concentration levels in the aqueous phase of mud for balanced activity mud systems, for maximum shale stability.

CaCl2-containing drilling mud can be used in high pressure formations.

It is much easier to dilute this material in water and has the ability to absorb dust from drilling operations inside the well.

Calcium Chloride is used in drilling mud with powder or flakes appearance to to supply Calcium ions. Calcium Chloride is one of the drilling fluids weighting agents. It can adjust the activity of the water phase in invert-emulsion mud.

Advantages of Calcium Chloride usage in drilling mud over other weighting agents, is its low price in formulation of solid-free completion brines.

The maximum density obtainable is 11.6 Ibm/gal (SG 1.68) with the addition of Calcium Bromide. Calcium Chloride and other brine completion fluids, eliminate plugging of producing sands often encountered when perforations are made through drilling mud. These brine fluids, free of solids, eliminate the problem of cracking, solidification and settling of solid materials on packers.

Calcium Chloride is used to control the activity of oil-based mud and work over/completion fluids. It is also an effective means of providing high Chloride ion concentration levels in the aqueous phase of mud for balanced activity mud systems, for maximum shale stability.

CaCl2-containing drilling mud can be used in high pressure formations.

It is much easier to dilute this material in water and has the ability to absorb dust from drilling operations inside the well.

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