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51317--9527-Application of Encapsulated Scale Inhibitors - Understanding the Field Success Factors

This product slowly dissolves for long term scale/corrosion protection. This paper describes the chemical management system that reviewed: statistical interpretation of the results, laboratory methodologies, software simulations to calculate (a) the amount of encapsulated materials (b) frequency of treatment, (c) the economic analysis.

 

Product Number: 51317--9527-SG
ISBN: 9527 2017 CP
Author: Mike Jackson
Publication Date: 2017
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The Cerro Dragón field in Comodoro Rivadavia Argentina produces 100000 bbl/day of oil and 1.3 million bbl /day water in 5 different districts. The field contains 3782 producing wells with more than 1000 ESP wells being treated for mostly scale and some for corrosion. Most of the wells produce via ESP. Due to a high Bottom Hole Temperature (~250oF) and moderate to high CaCO3 scaling tendencies many wells have a strong tendency for downhole scale formation. More than 1000 wells are treated for scale/corrosion and to minimize the complexity of logistics and cost factors the preferred control method is via the use of an innovative technology of encapsulated materials. This material is applied downhole via batch treatments where it slowly dissolves offering long term scale or corrosion protection. This paper will describe the management methodology that includes such factors as: statistical interpretation of the results new laboratory methodologies for screening the products software simulations to calculate (a) the amount of encapsulated materials to be used per well (b) the frequency of treatment (c) the economic analysis of this methodology. This paper will also describe the iterative improvement process in comparing field results with the calculated theoretical values.

Key words: Micro-encapsulated, Chemical Management System, integrity, flow assurance, rat hole, TCO (Total Cost Operation), ESP (electrical submergible pump), PCR (Phosphate Residual Concentration), MED (minimum effective dosage), Caps, Fall-Time.

 

The Cerro Dragón field in Comodoro Rivadavia Argentina produces 100000 bbl/day of oil and 1.3 million bbl /day water in 5 different districts. The field contains 3782 producing wells with more than 1000 ESP wells being treated for mostly scale and some for corrosion. Most of the wells produce via ESP. Due to a high Bottom Hole Temperature (~250oF) and moderate to high CaCO3 scaling tendencies many wells have a strong tendency for downhole scale formation. More than 1000 wells are treated for scale/corrosion and to minimize the complexity of logistics and cost factors the preferred control method is via the use of an innovative technology of encapsulated materials. This material is applied downhole via batch treatments where it slowly dissolves offering long term scale or corrosion protection. This paper will describe the management methodology that includes such factors as: statistical interpretation of the results new laboratory methodologies for screening the products software simulations to calculate (a) the amount of encapsulated materials to be used per well (b) the frequency of treatment (c) the economic analysis of this methodology. This paper will also describe the iterative improvement process in comparing field results with the calculated theoretical values.

Key words: Micro-encapsulated, Chemical Management System, integrity, flow assurance, rat hole, TCO (Total Cost Operation), ESP (electrical submergible pump), PCR (Phosphate Residual Concentration), MED (minimum effective dosage), Caps, Fall-Time.

 

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