Data/hora: 05/06/2024 11:23:36

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Study of barium sulfate dissolution by scale dissolver based on solutions of DTPA	
Autores: 	ABIB,GEIZILA A.P.; CRUZ,GEORGIANA F. DA; VAZ JUNIOR,ALEXANDRE S.L.	
Data: 	2018-09-01	
Ano: 	2018	
Palavras-chave: 	Mineral scale; Barite; Oil reservoir; Formation damage.	
Resumo: 	Abstract In offshore oil wells it is very common to perform seawater injection through injection wells for hydrocarbon recovery. When seawater, rich in sulfate ion, mixes with formation water, whose composition can contain divalent cations such as barium and calcium, it often leads to sulfate salts formation due to their chemical incompatibility. These salts can cause serious damage in production wells. The barium sulfate (BaSO4) is the most problematic scale and may cause many complications. In order to solve this issue, polycarboxylic acids, such as diethylene triamine pentaacetic acid, are used. Thus, the primary focus of this work was to develop an experimental procedure to study the BaSO4 dissolution. Initially, through static tests to understand the relationship between dissolver concentration, temperature and dissolution time, and then through dynamic tests in sandstone reservoirs. Based on the results obtained, in the static tests the best condition for barite to dissolve was at high temperatures (80 ºC) and contact time of 48 hours, since from 50 °C there is an increase in dissolution rate, associated with a long contact time between dissolver and barite. In the dynamic tests, after scale formation, barite could be removed, but the high DTPA concentration should be avoided.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603185	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201820170728	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.90 n.3 2018	
Fonte: 	info:eu-repo/semantics/openAccess