Patents by Inventor Victor M. Ziegler

Victor M. Ziegler 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).

  • Enhanced oil recovery method using an inverted nine-spot pattern
    Patent number: 5201815
    Abstract: In an inverted nine-spot pattern in an areally homogeneous reservoir, oil recovery is enhanced when the completion of the sidewells is restricted to the lower 20% of the reservoir. An inverted nine-spot pattern has a steam injection well at the center of the pattern and production wells at each of the four corners of the pattern and at the center of each side of the pattern. Steam is injected at the center well, and oil is produced from sidewells and corner wells.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: April 13, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Ki C. Hong, Victor M. Ziegler
  • Post-steam alkaline flooding using buffer solutions
    Patent number: 4813483
    Abstract: An enhanced oil recovery process is disclosed for formations that have been subjected to steam flooding. In that process, a weakly-alkaline (pH of less than 10) solution of sodium sesquicarbonate, sodium chloride salt, and an alpha olefin sulfonate dimer foaming agent is injected into the formation, then a nitrogen gas is injected into the formation to form in-situ foams for mobility control, and oil is recovered that is displaced by the sesquicarbonate solution and gas.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: March 21, 1989
    Assignee: Chevron Research Company
    Inventor: Victor M. Ziegler