Fall Meet., San Antonio, Tex., Oct 8– Google Scholar. Williams, et al., Williams, B.B., Gidley, J.L. and Schechter, R.S., Acidizing Fundamentals. Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below. Stimulation by acidizing is an old production enhancement technique dating as far . B.B. Williams, J.L. Gidley, and R.S. Schecter, “Acidizing Fundamentals”.

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During matrix acidizing the acids dissolve the sediments and mud acidixing within the pores that are inhibiting the permeability of the rock. Matrix acid stimulation is pumped into the formation at or below the fracturing pressure.

Other Authors Schechter, Robert Samuel.

Leak off control techniques need to be utilized to avoid this. These are two distinct and different purposes, the field applications and results of which are often merged or confused. In carbonate rock, hydrochloric acid enlarges the wellbore or tends to bypass damage by forming wormholes.

fundamehtals These online bookshops told us they have this item: The basic chemistry is HF reacts first with aluminosilicates to form fluorosilicates, which react further with clays to form insoluble sodium or potassium flurosilicates.

In the absence of aciizing, the large volume of acid that is required to improve the formation permeability in the vicinity of the wellbore may not justify the small incremental increase in production, especially in sandstone. J Pet Technol 45 3: None of your libraries hold this item.


Found at these bookshops Searching – please wait There are several other ways that acidizing, both for sandstone and carbonate reservoirs, can lead to formation damage if not carried out correctly.

Acidizing is used to either stimulate a well to greater than ideal matrix reservoir flow or to remove damage. Physical Description[6] p. The objective of matrix acid stimulation in carbonate matrix is to allow the acid to dissolve channels to create wormholes in the near wellbore region, reaching as far as possible into the formation. Acid stimulation refers to using a stimulation fluid containing reactive acids to increase permeability both in production and injector wells, carbonate or sandstone, by dissolving various acid-soluble solids naturally present in the rock matrix or as formation damage.

This process enlarges the natural pores of the reservoir which stimulates the flow of hydrocarbons.

Home This editionEnglish, Book, Illustrated edition: Gas wells — Acidization. Treatment design and planning are often performed to ensure that the acid is placed across the entire interval.

Such a program was developed by Brannon et al. Lower concentrations can be used as pickling acids to clean up the well in a preflush to remove scale and rust or an afterflush. This single location in Australian Capital Territory: In sandstone fundamentzls acidizing, the primary purpose is to remove acid-soluble damage in the well and near wellbore area.


The permeability increase is much larger in carbonate than in sandstone. The most common acid used in carbonate fracture or matrix acidizing acidiziny hydrochloric acid HCl.

Matrix acidizing

Fracture acid stimulation is usually carried out on carbonate reservoirs, which have lower permeability than sandstone reservoirs. In sandstone acidizing, one has to be particularly careful of reprecipitation of reaction products, which could cause new formation damage [ 7 ]. Stimulation by acidizing is an old production enhancement technique dating as far back as the nineteenth century [ 2 ] when Herman Frasch fundamfntals Standard Oil patented the use of hydrochloric acid HCl to stimulate carbonate formations.

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Acidizing Fundamentals – Bert B. Williams, John L. Gidley, Robert Samuel Schechter – Google Books

Set up My libraries How do I set up “My libraries”? Gidley [4] presented the results of an fundamenyals statistical review of one company’s acidizing success in sandstone reservoirs in the U. More recently, Nitters et al. CaF 2 and AlF 3 can also precipitate in the spent acid.