Patents by Inventor SHANWEN YU

SHANWEN YU 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: 11447589
    Abstract: A main chain of a temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer is composed of the following repeating unit (I): In the repeating unit (I): x:y:z=(20˜80):(20˜80):(2˜30); the R1 and R2 groups are alkylamines having a multi-branched structure. The beneficial effect of the multi-branched polymer fluid loss reducer is: introducing cheap acrylamide branch monomer into the polymer monomer system of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, the preparation process is simple, the reaction conditions are mild, and the production cost is significantly reduced.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: September 20, 2022
    Assignee: YANGTZE UNIVERSITY
    Inventors: Aibin Wu, Weichu Yu, Wenming Shu, Ying Zhang, Shanwen Yu
  • Patent number: 11162347
    Abstract: Disclosed is slick water volumetric fracturing method with large liquid volume, high flow rate, large preflush and low sand ratio, including the following steps: (a) evaluating the reservoir parameters; (b) determining the perforation position and a perforation parameters of a fracturing interval; (c) determining the fracturing parameters; (d) performing a perforation operation on the fracturing interval; (e) injecting acidizing fluids into the perforation; (f) alternately injecting preflush and sand-laden fluids into the fracturing interval several times; (g) injecting displacement fluids into the fracturing interval; wherein the flow rate is not less than 12 m3/min. The beneficial effect of the technical scheme proposed in the present invention is: by using a low viscosity slick water fracturing fluid with high flow rate, the pressure of the fracturing fluid is increased, thereby increasing the stimulated reservoir volume and increasing the fracturing yield.
    Type: Grant
    Filed: November 3, 2019
    Date of Patent: November 2, 2021
    Assignee: YANGTZE UNIVERSITY
    Inventors: Weichu Yu, Dongkui Zhou, Ying Zhang, Xiangsong Xiao, Shanwen Yu
  • Patent number: 11136865
    Abstract: Disclosed is an integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir, including the following steps: dividing the target layer into several fracturing intervals; determining the amount of fracturing fluid required for the target fracturing interval; determining the flow rate of the target fracturing interval; determining the pumping construction procedure for the target fracturing interval; perforating the target fracturing interval; injecting oil displacement fracturing fluid into the target fracturing interval for fracturing construction; wherein the oil displacement fracturing fluid is a fracturing fluid to which an oil displacement agent is added.
    Type: Grant
    Filed: November 3, 2019
    Date of Patent: October 5, 2021
    Assignee: YANGTZE UNIVERSITY
    Inventors: Weichu Yu, Qingwen Zeng, Ying Zhang, Xiangsong Xiao, Shanwen Yu
  • Publication number: 20210155730
    Abstract: The invention discloses a temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer and preparation method thereof. The main chain of the temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer is composed of the following repeating unit (I): In the repeating unit (I): x:y:z=(20˜80):(20˜80):(2˜30); the R1 and R2 groups are alkylamines having a multi-branched structure. The beneficial effect of the technical scheme proposed in the present invention is: introducing cheap acrylamide branch monomer into the polymer monomer system of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, the preparation process is simple, the reaction conditions are mild, and the production cost is significantly reduced. At the same time, the polymerized monomer does not contain aromatic ring monomers and ionizable monomers, is environmentally friendly, and maintains excellent temperature resistance, salt resistance and anti-collapse properties.
    Type: Application
    Filed: December 16, 2019
    Publication date: May 27, 2021
    Inventors: AIBIN WU, WEICHU YU, WENMING SHU, YING ZHANG, SHANWEN YU
  • Publication number: 20210108495
    Abstract: Disclosed is slick water volumetric fracturing method with large liquid volume, high flow rate, large preflush and low sand ratio, including the following steps: (a) evaluating the reservoir parameters; (b) determining the perforation position and a perforation parameters of a fracturing interval; (c) determining the fracturing parameters; (d) performing a perforation operation on the fracturing interval; (e) injecting acidizing fluids into the perforation; (f) alternately injecting preflush and sand-laden fluids into the fracturing interval several times; (g) injecting displacement fluids into the fracturing interval; wherein the flow rate is not less than 12 m3/min. The beneficial effect of the technical scheme proposed in the present invention is: by using a low viscosity slick water fracturing fluid with high flow rate, the pressure of the fracturing fluid is increased, thereby increasing the stimulated reservoir volume and increasing the fracturing yield.
    Type: Application
    Filed: November 3, 2019
    Publication date: April 15, 2021
    Inventors: WEICHU YU, DONGKUI ZHOU, YING ZHANG, XIANGSONG XIAO, SHANWEN YU
  • Publication number: 20210108491
    Abstract: Disclosed is an integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir, including the following steps: dividing the target layer into several fracturing intervals; determining the amount of fracturing fluid required for the target fracturing interval; determining the flow rate of the target fracturing interval; determining the pumping construction procedure for the target fracturing interval; perforating the target fracturing interval; injecting oil displacement fracturing fluid into the target fracturing interval for fracturing construction; wherein the oil displacement fracturing fluid is a fracturing fluid to which an oil displacement agent is added.
    Type: Application
    Filed: November 3, 2019
    Publication date: April 15, 2021
    Inventors: WEICHU YU, QINGWEN ZENG, YING ZHANG, XIANGSONG XIAO, SHANWEN YU