Petroleo Brasileiro S.a. - Petrobras

Petróbras Brasileiro S. A.—petrobras

Tiago Cavalcante Freitas

Mario Germino Ferreira Da Silva

Fernando Antonio Moreira Da Silva

Francisca Ferreira Do Rosario

Valtair Marcos Cristante

Rosane Alves Fontes

Patricia Braga Gusmao

Daniel Monteiro Pimentel

Sergio Taveira De Camargo Junior

Marcelo Almeida Gomes

Katia Regina Silva Alves Da Rosa

Roberto Motto Gomes

Pedro Andre Nogueria Souza De Oliveira Vale

Giselle Maria Lopes Leite Da Silva

Lilia Naveira Bukahi

Francileide Gomes Da Costa

Bernardo Caldeira Dias

Thiago Da Costa Ribeiro

Geraldo Marcel Gomes Calil

Tatiana Pitchon Sampaio

Leandro Fernandes Telles

The present invention relates to a system and process for assisted autonomous treatment for removing and/or inhibiting scale with desulfated seawater on pre-salt production platforms, using production facilities and injection water, without the need of using a stimulation vessel or a workover rig.

Assisted autonomous treatment system and process in pre-salt production platforms, and their uses

A joint application process of two treatments, scale removal and inhibitor squeeze injection, is described herein. Through the simultaneous positioning inside the reservoir, it can be applied in scale removal operations for carbonate formations, such as the pre-salt case. Accordingly, there is a way to improve the efficiency of reservoir management, through an innovation in the scaling management process.

Method for the combined application of scale remover and inhibitor

This invention contains a method focused on increasing the water saturation of the reservoir by injecting industrial water into the well via SPU, thus diluting the concentration of salts, such as halite (sodium chloride). When the oil passes through the gas lift mandrel, this dilution will allow a part of the BSW water to evaporate, however, the amount of water that will remain in the oil will be sufficient to keep the salts in solution, thus scale formation will not occur and therefore no loss of production will occur. One of the focus areas of the method of this invention are high-temperature and low-BSW production reservoir wells. The solution of this invention minimizes the frequency of well treatments, avoiding loss of production due to well stoppage. The technical advantages of the method are increased reliability for SPU, increased NPV of operations and increased safety due to the reduction of operations with participation of the stimulation vessel.

Method for preventing saline scale in low-activity, aqueous-phase reservoir wells and its use

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Rio de Janeiro, Brazil

Tiago Cavalcante Freitas