Complex barite filter cake removal using in-situ generated acids by thermochemicals

Abstract In sandstone formations, the quartz particles integrate with drilling fluid solids and become part of the filter cake structure. As a result, the dissolution rate of the filter cake diminishes and reduces the removal efficiency. This paper presents a novel solution to overcome the challenge...

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Autores principales:	Badr S. Bageri, Ibrahim Gomaa, Mohamed Mahmoud, Shirish Patil, Ayman Al-Nakhli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5e6f2903f0fe4802896c35fb2d98dee5
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spelling	oai:doaj.org-article:5e6f2903f0fe4802896c35fb2d98dee52021-12-02T18:48:22ZComplex barite filter cake removal using in-situ generated acids by thermochemicals10.1038/s41598-020-72858-y2045-2322https://doaj.org/article/5e6f2903f0fe4802896c35fb2d98dee52020-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-72858-yhttps://doaj.org/toc/2045-2322Abstract In sandstone formations, the quartz particles integrate with drilling fluid solids and become part of the filter cake structure. As a result, the dissolution rate of the filter cake diminishes and reduces the removal efficiency. This paper presents a novel solution to overcome the challenges that restricts the filter cake removal process such as the presence of the quartz layer and the polymer coat. A multi-stage method for removing the filter cake from a wellbore is presented. The composition of the new formulation is; ammonium fluoride (NH4F), with a strong oxidizer, such as sodium bromate (NaBrO3) causes an exothermic reaction in the first stage, thereby removing the quartz layer and polymer coat in the filter cake by the in-situ generated HF acid. During the second stage for the barite-based filter cake, chelating agents combined with convertor catalysts were used to dissolve the barite. Solubility experiments were conducted to evaluate the efficiency at each stage in the filter cake removal process at 300 ºF and 500 psi. The experimental results showed that the formulation consisting of ammonium fluoride (NH4F), with a strong oxidizer (sodium bromate,NaBrO3), combined with exothermic reaction was able to generate HF in-situ, which in turn dissolved the quartz mineral and remove the polymer from the filter cake.Badr S. BageriIbrahim GomaaMohamed MahmoudShirish PatilAyman Al-NakhliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Badr S. Bageri Ibrahim Gomaa Mohamed Mahmoud Shirish Patil Ayman Al-Nakhli Complex barite filter cake removal using in-situ generated acids by thermochemicals
description	Abstract In sandstone formations, the quartz particles integrate with drilling fluid solids and become part of the filter cake structure. As a result, the dissolution rate of the filter cake diminishes and reduces the removal efficiency. This paper presents a novel solution to overcome the challenges that restricts the filter cake removal process such as the presence of the quartz layer and the polymer coat. A multi-stage method for removing the filter cake from a wellbore is presented. The composition of the new formulation is; ammonium fluoride (NH4F), with a strong oxidizer, such as sodium bromate (NaBrO3) causes an exothermic reaction in the first stage, thereby removing the quartz layer and polymer coat in the filter cake by the in-situ generated HF acid. During the second stage for the barite-based filter cake, chelating agents combined with convertor catalysts were used to dissolve the barite. Solubility experiments were conducted to evaluate the efficiency at each stage in the filter cake removal process at 300 ºF and 500 psi. The experimental results showed that the formulation consisting of ammonium fluoride (NH4F), with a strong oxidizer (sodium bromate,NaBrO3), combined with exothermic reaction was able to generate HF in-situ, which in turn dissolved the quartz mineral and remove the polymer from the filter cake.
format	article
author	Badr S. Bageri Ibrahim Gomaa Mohamed Mahmoud Shirish Patil Ayman Al-Nakhli
author_facet	Badr S. Bageri Ibrahim Gomaa Mohamed Mahmoud Shirish Patil Ayman Al-Nakhli
author_sort	Badr S. Bageri
title	Complex barite filter cake removal using in-situ generated acids by thermochemicals
title_short	Complex barite filter cake removal using in-situ generated acids by thermochemicals
title_full	Complex barite filter cake removal using in-situ generated acids by thermochemicals
title_fullStr	Complex barite filter cake removal using in-situ generated acids by thermochemicals
title_full_unstemmed	Complex barite filter cake removal using in-situ generated acids by thermochemicals
title_sort	complex barite filter cake removal using in-situ generated acids by thermochemicals
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/5e6f2903f0fe4802896c35fb2d98dee5
work_keys_str_mv	AT badrsbageri complexbaritefiltercakeremovalusinginsitugeneratedacidsbythermochemicals AT ibrahimgomaa complexbaritefiltercakeremovalusinginsitugeneratedacidsbythermochemicals AT mohamedmahmoud complexbaritefiltercakeremovalusinginsitugeneratedacidsbythermochemicals AT shirishpatil complexbaritefiltercakeremovalusinginsitugeneratedacidsbythermochemicals AT aymanalnakhli complexbaritefiltercakeremovalusinginsitugeneratedacidsbythermochemicals
_version_	1718377624786436096

Complex barite filter cake removal using in-situ generated acids by thermochemicals

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