Patents by Inventor Fengshou Zhang

Fengshou Zhang 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).

  • Method for pre-warning deformation of casing pipe according to change feature of b-value of hydraulic fracturing induced microseismicity
    Patent number: 11560789
    Abstract: The present disclosure relates to a method for pre-warning deformation of a casing pipe according to a change feature of the b-value of the hydraulic fracturing induced microseismicity. Based on number distribution and seismic magnitudes of hydraulic fracturing induced microseismic monitoring events, a b-value of microseismicity in a fracturing stage is calculated according to a Gutenberg-Richter relation describing frequency-seismic magnitude distribution in seismology, and whether fault activation occurs in a fracturing process is identified according to a change feature of the b-value. According to the method, a cumulative effect of fault activation in the hydraulic fracturing process is considered, and symptoms of fault activation in the fracturing process can be accurately identified, so as to pre-warn deformation of the casing pipe.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: January 24, 2023
    Assignee: Tongji University
    Inventors: Fengshou Zhang, Rui Feng, Zirui Yin, Shutian Cao, Luanxiao Zhao
  • METHOD FOR PRE-WARNING DEFORMATION OF CASING PIPE ACCORDING TO CHANGE FEATURE OF B-VALUE OF HYDRAULIC FRACTURING INDUCED MICROSEISMICITY
    Publication number: 20220243584
    Abstract: The present disclosure relates to a method for pre-warning deformation of a casing pipe according to a change feature of the b-value of the hydraulic fracturing induced microseismicity. Based on number distribution and seismic magnitudes of hydraulic fracturing induced microseismic monitoring events, a b-value of microseismicity in a fracturing stage is calculated according to a Gutenberg-Richter relation describing frequency-seismic magnitude distribution in seismology, and whether fault activation occurs in a fracturing process is identified according to a change feature of the b-value. According to the method, a cumulative effect of fault activation in the hydraulic fracturing process is considered, and symptoms of fault activation in the fracturing process can be accurately identified, so as to pre-warn deformation of the casing pipe.
    Type: Application
    Filed: October 19, 2021
    Publication date: August 4, 2022
    Inventors: Fengshou Zhang, Rui Feng, Zirui Yin, Shutian Cao, Luanxiao Zhao