Patents by Inventor Chunmei Xu

Chunmei Xu 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 in-depth profile control and displacement of low-permeability oil reservoirs
    Patent number: 10920127
    Abstract: The present invention provides a method for in-depth profile control and displacement of low-permeability oil reservoirs, comprising: sequentially injecting a flexible and elastic particle-containing pre-slug, a polymer microsphere-containing main slug and a flexible and elastic particle-containing protective slug into an oil layer, and the three slugs have a volume ratio of total injection amount of 1-2:6-8:1-2. The invention provides a method for in-depth profile control and displacement by using styrene-based flexible and elastic particles in combination with the polyacrylamide polymer microsphere, wherein the flexible elastic particles can block cracks and large pore channels of the oil layer, and the polymer microsphere can displace the remaining oil in the oil layer. In the present invention, different slugs of profile control and displacement system are combined to achieve the objective of blocking cracks and large pore channels, displacing crude oil, and improving oil well recovery.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: February 16, 2021
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Tianjiang Wu, Mingke Zheng, Xianwen Li, Haien Yang, Xiaorong Li, Fan Tang, Fangfang Xue, Ronghuan Chen, Rong Zhang, Lijun Zheng, Chunmei Xu, Baoche Liu, Ping Yi, Jiajie Zhu, Weiyu Bi
  • METHOD FOR IN-DEPTH PROFILE CONTROL AND DISPLACEMENT OF LOW-PERMEABILITY OIL RESERVOIRS
    Publication number: 20190292438
    Abstract: The present invention provides a method for in-depth profile control and displacement of low-permeability oil reservoirs, comprising: sequentially injecting a flexible and elastic particle-containing pre-slug, a polymer microsphere-containing main slug and a flexible and elastic particle-containing protective slug into an oil layer, and the three slugs have a volume ratio of total injection amount of 1-2:6-8:1-2. The invention provides a method for in-depth profile control and displacement by using styrene-based flexible and elastic particles in combination with the polyacrylamide polymer microsphere, wherein the flexible elastic particles can block cracks and large pore channels of the oil layer, and the polymer microsphere can displace the remaining oil in the oil layer. In the present invention, different slugs of profile control and displacement system are combined to achieve the objective of blocking cracks and large pore channels, displacing crude oil, and improving oil well recovery.
    Type: Application
    Filed: January 18, 2019
    Publication date: September 26, 2019
    Inventors: Tianjiang Wu, Mingke Zheng, Xianwen Li, Haien Yang, Xiaorong Li, Fan Tang, Fangfang Xue, Ronghuan Chen, Rong Zhang, Lijun Zheng, Chunmei Xu, Baoche Liu, Ping Yi, Jiajie Zhu, Weiyu Bi