Patents by Inventor Priscila Moczydlower

Priscila Moczydlower has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the selective controlled reduction of the relative water permeability in high permeability oil-bearing subterranean formations
    Patent number: 7395858
    Abstract: A process for the selective controlled reduction of the relative water permeability in high permeability, oil-bearing formations, with negligible reduction of the permeability to oil. The process comprises, for sandstone reservoir rocks, a first layer of cationic polymer, followed by a brine spacer slug and a second polymer layer made up of a suspension of anionic polymer and an anionic or non-ionic microgel, optionally this configuration being repeated. As a result the thickness of the polymer layer is considerably increased, which permits the process to be used in high permeability formations. For limestone rocks the first layer is made up of anionic polymer, while the second layer involves a suspension of cationic polymer/cationic or non-ionic microgel. The polymers are all injected as aqueous suspensions in brine or seawater.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: July 8, 2008
    Assignee: Petroleo Brasiliero S.A. — Petrobras
    Inventors: Luis Cesar Ferreira Barbosa, Sérgio Luiz Pereira de Freitas Coelho, Priscila Moczydlower, Geraldo Maria Ramos de Godoy, Edson de Souza Leite
  • Process for the selective controlled reduction of the relative water permeability in high permeability oil-bearing subterranean formations
    Publication number: 20070062697
    Abstract: A process for the selective controlled reduction of the relative water permeability in high permeability, oil-bearing formations, with negligible reduction of the permeability to oil. The process comprises, for sandstone reservoir rocks, a first layer of cationic polymer, followed by a brine spacer slug and a second polymer layer made up of a suspension of anionic polymer and an anionic or non-ionic microgel, optionally this configuration being repeated. As a result the thickness of the polymer layer is considerably increased, which permits the process to be used in high permeability formations. For limestone rocks the first layer is made up of anionic polymer, while the second layer involves a suspension of cationic polymer/cationic or non-ionic microgel. The polymers are all injected as aqueous suspensions in brine or seawater.
    Type: Application
    Filed: November 21, 2006
    Publication date: March 22, 2007
    Applicant: PETROLEO BRASILEIRO S.A. - PETROBRAS
    Inventors: Luis Cesar Barbosa, Sergio Luiz de Freitas Coelho, Priscila Moczydlower, Geraldo Maria de Godoy, Edson de Souza Leite