Patents by Inventor Xia Dan

Xia Dan 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).

  • Patent number: 12359560
    Abstract: The present disclosure relates to a method for evaluating a temporary plugging effect of fracturing in a low-permeability oil-gas reservoir based on monitoring pressure. The method comprises: calculating a wellbore friction resistance along a way from a wellhead to a target fracturing segment; calculating, based on a wellhead pressure monitored at the wellhead in real time, a wellbore pressure at the target fracturing segment; calculating a fluid pressure at a crack opening of each perforation cluster; calculating a perforation friction resistance coefficient of each perforation cluster; calculating a fracturing fluid instantaneous displacement of each perforation cluster; calculating, based on the fracturing fluid instantaneous displacement of each perforation cluster, a variation coefficient of a fracturing fluid displacement distribution after a fracturing construction is completed; and evaluating the temporary plugging effect of fracturing based on the variation coefficient.
    Type: Grant
    Filed: February 7, 2025
    Date of Patent: July 15, 2025
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xiyu Chen, Haiyang Tang, Yongming Li, Jinzhou Zhao, Xia Dan, Linyao Yu
  • Patent number: 12331623
    Abstract: The embodiments of the present disclosure provide a method for diagnosing control effectiveness of a fracture height in hydraulic fracturing by combining monitoring a pressure signal, comprising: obtaining engineering data and geological data; calculating a fracture slit fluid pressure, a double-logarithmic slope of the fracture slit fluid pressure, and a bedding fracture pressure; updating a growth time of the fracture height and a reference pressure based on the fracture height in hydraulic fracturing; based on determining whether a fracturing construction operation ends, updating the cumulative fracturing time or calculating a ratio of the growth time of the fracture height to the total time of hydraulic fracturing.
    Type: Grant
    Filed: February 12, 2025
    Date of Patent: June 17, 2025
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xiyu Chen, Manqing Qian, Yongming Li, Jinzhou Zhao, Xia Dan, Linyao Yu, Zhibo Yu