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51313-02661-Environmentally Friendly Polymer Squeeze Inhibitor for Short Perforation and High Water ESP Wells

Picture for Environmentally Friendly Polymer Squeeze Inhibitor for Short Perforation and High Water ESP Wells
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Product Number: 51313-02661-SG
ISBN: 02661 2013 CP
Author: Tao Chen
Publication Date: 2013
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$20.00
$20.00

Inhibitor squeeze treatments have been regularly carried out to prevent both sulphate and carbonate scale depositions in reservoir in North Sea fields. Some of the wells especially for the short perforation high water production wells and relatively clean sandstone with little amount of clay material had experienced a relatively short squeeze life with traditional squeeze treatment.

In this paper a squeeze field application in a short perforation and high water production ESP well in North Sea was carried out with a satisfactory result. The squeeze life had been achieved up to one year. Several squeeze life enhancement techniques including squeeze life enhancer new environmentally acceptable inhibitor chemistry and squeeze design had been applied and will discuss in detail.

This paper outlines the idea of how a special monomer was introduced to new scale inhibitor chemistry. The monomer enhanced the inhibitor adsorption property as its special function group has a good affinity to the reservoir rock and offers a good squeeze life. In addition the environmental property of the polymer was also improved due to the introduction of the special monomer. A number of beaker and dynamic loop tests were carried out and the inhibitor showed an excellent efficiency in both sulphate and carbonate scale inhibition under the test conditions.

In order to reduce the well intervention frequency and extend an inhibitor squeeze life a method involving a polymer interaction between a polymer scale inhibitor and polymer additive has been deployed. In addition to the enhanced adsorption; attributed by the surface charge modification by the adsorption of the positively charged polymer additive on the sandstone surface the interactions between polymer inhibitor and additive further increase the inhibitor retention in the formation. This polymer interaction approach is different from a conventional precipitation squeeze where calcium chloride was used.

The paper also presents the detailed laboratory and field data. In addition the treatment design strategy and deployment method of the scale inhibitor are discussed.
 

Inhibitor squeeze treatments have been regularly carried out to prevent both sulphate and carbonate scale depositions in reservoir in North Sea fields. Some of the wells especially for the short perforation high water production wells and relatively clean sandstone with little amount of clay material had experienced a relatively short squeeze life with traditional squeeze treatment.

In this paper a squeeze field application in a short perforation and high water production ESP well in North Sea was carried out with a satisfactory result. The squeeze life had been achieved up to one year. Several squeeze life enhancement techniques including squeeze life enhancer new environmentally acceptable inhibitor chemistry and squeeze design had been applied and will discuss in detail.

This paper outlines the idea of how a special monomer was introduced to new scale inhibitor chemistry. The monomer enhanced the inhibitor adsorption property as its special function group has a good affinity to the reservoir rock and offers a good squeeze life. In addition the environmental property of the polymer was also improved due to the introduction of the special monomer. A number of beaker and dynamic loop tests were carried out and the inhibitor showed an excellent efficiency in both sulphate and carbonate scale inhibition under the test conditions.

In order to reduce the well intervention frequency and extend an inhibitor squeeze life a method involving a polymer interaction between a polymer scale inhibitor and polymer additive has been deployed. In addition to the enhanced adsorption; attributed by the surface charge modification by the adsorption of the positively charged polymer additive on the sandstone surface the interactions between polymer inhibitor and additive further increase the inhibitor retention in the formation. This polymer interaction approach is different from a conventional precipitation squeeze where calcium chloride was used.

The paper also presents the detailed laboratory and field data. In addition the treatment design strategy and deployment method of the scale inhibitor are discussed.
 

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