Petroleo Brasileiro S.a. - Petrobras

Fernando Antonio Moreira Da Silva

Mario Germino Ferreira Da Silva

Valtair Marcos Cristante

Tiago Cavalcante Freitas

Paulo Henrique De Amorim Martins

Patricia Braga Gusmao

Francisca Ferreira Do Rosario

Rosane Alves Fontes

Thiago Geraldo Da Silva

Daniel Monteiro Pimentel

Geraldo Marcel Gomes Calil

Jose Sergio Daher

Leandro Fernandes Telles

Thiago Da Costa Ribeiro

Roberto Motto Gomes

Fabio Antonio Teixeira Saboia Filho

Stefan Suarez Ferreira

Lilia Naveira Bukahi

Francisca Ferreira Do Rosário

Tatiana Pitchon Sampaio

Patricia Braga Gusmão

Marcelo Almeida Gomes

Ciro Dos Santos Guimaraes

Caio Mezencio Pimenta

Pedro Andre Nogueria Souza De Oliveira Vale

Bernardo Caldeira Dias

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

The present invention relates to a method for storing chemical products or their solutions in reservoir rock. In said method, the cargo boat containing the chemical product to be stored in the reservoir is connected to the production platform through an appropriate connection and connecting to the well header. The product is pumped through the chemical product capture line using a triplex chemical injection pump aligned to the head of the production or injection well. The product is pumped through the surface lines, riser and subsea line and, passing through the WCT, it is injected into the reservoir through the production or injection string.

Method for expanding the capacity for local storage of chemical products or their solutions in reservoir rock

The present invention relates to a method for applying scale inhibitor to completion fluids during injectivity test operations. Said method takes advantage of the completion fluid to inhibit scaling in the reservoir by filling the porous spaces of the reservoir rock with the inhibited completion fluid. When the well is put into production, this inhibited fluid positioned inside the reservoir will be produced together with the oil and will inhibit the formation of scale inside the reservoir and on production equipment.

Method for applying the scale inhibitor to completion fluids during injectivity test operations

The present invention provides a system and method for use of desulphated injection water from offshore platforms for utilization in inhibition squeeze operations. The system is capable of increasing the treatment capacity by joining the pumping system from the stimulation vessel with the water injection system from the offshore platform. In the initial treatment step, according to the method of this invention, the fluid containing the inhibitor is pumped exclusively by the vessel, followed by an aqueous overflush, where the injection water is mixed with part of the inhibitor cushion pumped by the stimulation vessel.

System and method for use of desulphated injection water from offshore platforms for utilization in inhibition squeezes

The present invention relates to an autonomous chemical treatment system and method for drilling and completion probes, so that it allows the probe to carry out chemical treatments in subsea wells, dispensing the need to use the WSSV, which has a limited treatment capacity due to tank volumetry, generally smaller that the marine probes.

Autonomous chemical treatment system and method for drilling and completion rigs

The present invention refers to a method for removing fouling in carbonate reservoirs and/or depleted reservoirs by adding carbon dioxide to industrial or desulphated water to produce carbonic acid, in producing well stimulation operations, to be used as a weak acid for removing fouling in remote operation aiming at keeping the productivity of producing wells and lessening the need for remote operations with stimulation vessel, and therefore reducing operating costs.

Method for removing fouling using carbonic acid

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

The present invention addresses to a remote and autonomous chemical treatment system for application in producing wells of offshore platforms aiming at treatments for removal and prevention of production string fouling, selective completion system, well safety equipment (DHSV, HFIV) and rock formation. The purpose of this invention is to completely replace the stimulation boat, thus allowing treatments to be carried out with resources from the routine operational contracting of the offshore production unit.

Remote and autonomous chemical treatment system for application in producing wells of offshore platforms

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Rio de Janeiro, Brazil

Fernando Antonio Moreira Da Silva