Title:
SURFACE MODIFIER FOR DRILLING FLUID AND PREPARATION METHOD FOR SURFACE MODIFIER
Document Type and Number:
WIPO Patent Application WO/2024/093333
Kind Code:
A1
Abstract:
Provided in the present application are a surface modifier for a drilling fluid and a preparation method for the surface modifier. The surface modifier for the drilling fluid of the present application comprises the following components in parts by mass: 100-130 parts of a polyether chain segment siloxane polymer; 60-80 parts of a block fluoroethylene copolymer; 60-70 parts of an acrylic higher ester polymer; 1-5 parts of mercaptan; 5-10 parts of nanoparticles; 10-15 parts of polyethylene glycol; 7-9 parts of trimethyl ammonium chloride; 10-25 parts of dimethyl ammonium chloride; and 400-500 parts of deionized water. The surface modifier for the drilling fluid can relieve the liquid-phase trap damage of a compact/shale reservoir, and can relieve oil film damage and emulsification damage possibly caused by an oil-based drilling fluid and a subsequent water-based working fluid, such that a test yield is improved.
Inventors:
ZHANG JIE (CN)
SUN JINSHENG (CN)
ZHAO ZHILIANG (CN)
WANG SHUANGWEI (CN)
ZHANG HANSHI (CN)
ZHOU SHUANGJUN (CN)
HE LEI (CN)
ZHAO LI (CN)
MA YONG (CN)
GUO JIANHUA (CN)
WANG RUI (CN)
YAO XUYANG (CN)
SUN JINSHENG (CN)
ZHAO ZHILIANG (CN)
WANG SHUANGWEI (CN)
ZHANG HANSHI (CN)
ZHOU SHUANGJUN (CN)
HE LEI (CN)
ZHAO LI (CN)
MA YONG (CN)
GUO JIANHUA (CN)
WANG RUI (CN)
YAO XUYANG (CN)
Application Number:
PCT/CN2023/105330
Publication Date:
May 10, 2024
Filing Date:
June 30, 2023
Export Citation:
Assignee:
CHINA NAT PETROLEUM CORP (CN)
CNPC ENGINEERING TECH R & D CO LTD (CN)
CNPC ENGINEERING TECH R & D CO LTD (CN)
International Classes:
C09K8/03
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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