Patents by Inventor Dexin Qiao

Dexin Qiao 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).

  • Quantitative calculation method for oil (gas) saturation of fractured reservoir
    Patent number: 8805661
    Abstract: A quantitative calculation method for oil (gas) saturation of fractured reservoir during petroleum exploitation is provided. The method comprises: obtaining the fracture porosity and calculating resistivity index at different depth of fractured reservoir with known full diameter core data and imaging logging data; establishing the percolation network model of matrix and fracture combination with known pore structure feature; calibrating the numerical simulation results obtained from percolation network model based on the data of core experiment and sealed coring analysis results, then obtaining the relationship between the resistivity index (I) and water saturation (Sw) at different fracture porosity; calculating the oil (gas) saturation of fractured reservoir through selecting an interpolation function. The oil (gas) saturation calculated with said method is 0.67, however 0.49 with common method in some fractured reservoir. The accuracy is improved by more than 0.18 in the studied fractured reservoir.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 12, 2014
    Assignee: PetroChina Company Limited
    Inventors: Ning Li, Kewen Wang, Dexin Qiao, Qingfu Feng, Hongliang Wu
  • QUANTITATIVE CALCULATION METHOD FOR OIL (GAS) SATURATION OF FRACTURED RESERVOIR
    Publication number: 20120109603
    Abstract: A quantitative calculation method for oil (gas) saturation of fractured reservoir during petroleum exploitation is provided. The method comprises: obtaining the fracture porosity and calculating resistivity index at different depth of fractured reservoir with known full diameter core data and imaging logging data; establishing the percolation network model of matrix and fracture combination with known pore structure feature; calibrating the numerical simulation results obtained from percolation network model based on the data of core experiment and sealed coring analysis results, then obtaining the relationship between the resistivity index (I) and water saturation (Sw) at different fracture porosity; calculating the oil (gas) saturation of fractured reservoir through selecting an interpolation function. The oil (gas) saturation calculated with said method is 0.67, however 0.49 with common method in some fractured reservoir. The accuracy is improved by more than 0.18 in the studied fractured reservoir.
    Type: Application
    Filed: March 31, 2010
    Publication date: May 3, 2012
    Inventors: Ning Li, Kewen Wang, Dexin Qiao, Qingfu Feng, Hongliang Wu