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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Help to improve this page What’s this? Tags What are tags? Login to add to list. Add a tag Cancel Be the first to add a tag for this edition. There are several other ways that acidizing, both for sandstone and carbonate reservoirs, can lead to formation damage if not carried out correctly.

Gidley [4] presented the results of an extensive statistical review of one company’s acidizing success in sandstone reservoirs in the U. Sandstone reservoir is mainly composed of quartz and aluminosilicates such as feldspars.

Matrix acidizing

Then set up a personal list of libraries from your profile page by clicking on your user name at the top right of any screen. Matrix acidizing is applied primarily to remove damage caused by drilling, completion, and workover fluids fundamengals solids precipitated from produced water or oil i.

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. In order to set up a list of libraries that you have access to, you must first login or sign up. In sandstone matrix acidizing, the primary purpose is to remove acid-soluble damage in the well and near wellbore area. Lower concentrations can be used as pickling acids to clean up the well in a preflush to remove scale and rust or an afterflush.


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

Did you find what you were looking for? Acidizimg Us Subscribe to newsletter How to contribute? Conducting the acidizing procedure. By posting, you agree to be identified by your IP address. Permeability improvement in gas wells is typically better than oil wells.

When there is no damage present, improper or poorly executed acid treatments can reduce the natural formation permeability and reduce well productivity, as in new wells with low reservoir permeability.

J Pet Technol 45 3: In addition, the acid stimulation fluid follows the paths of least resistance and create typically long-branched passageways leading away from the fracture interface, which are called “wormholes”.

This single location in New South Wales: Physical Description[6] p. The basic chemistry is HF reacts first with aluminosilicates to form fluorosilicates, which react further with clays to form insoluble sodium or potassium flurosilicates. Stimulation by acidizing is an old production enhancement technique dating as far back as the nineteenth century [ 2 ] when Herman Frasch of Standard Oil patented the use of hydrochloric acid HCl to stimulate carbonate formations.


Either mechanical or chemical placement techniques can be used to improve contact of the acid solution with the interval.

Acid stimulation

Later injected fracturing fluid tend to leak off into the wormholes rather than lengthening the desired fracture. Set up My libraries How do I set up “My libraries”? You also may like to try some of these bookshopswhich may or may not sell this item.

HF, or more usually HF-releasing chemicals such as ammonium bifluoride NH 4 HF 2is used for sandstone matrix acidizing, combined with hydrochloric HCl or organic acids.

The maximum rate allowed is a function of the carbonate permeability. These 3 locations in All: The effect of damage on well productivity and flow is illustrated in Figs. In high temperature applications, HCl does not produce acceptable stimulation results due to its fast reaction that leads to lack of penetration.

Lists What are lists? Comments and reviews What are comments? Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below fracture pressure.