Title:
LOST-CIRCULATION COMPOSITION, LOST-CIRCULATION MATERIAL AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/051495
Kind Code:
A1
Abstract:
The present invention relates to the field of oil drilling. Disclosed are a lost-circulation composition, a lost-circulation material and a use thereof. The lost-circulation composition can be cross-linked to form a gel before or during being injected into the formation, and the gel can be cured at the lost-circulation formation to form a lost-circulation material, wherein the mass retention rate of the gel when scouring at 50-180℃ for 30 min at a water flow rate of 10 m/min is 90% or more; and the lap anti-shear strength of the lost-circulation material is 0.1-0.14 MPa. The lost-circulation composition of the present invention is suitable for a water-bearing formation having a temperature of not higher than 180℃, especially a flowing water-bearing formation. According to the present invention, the lost-circulation composition can be cross-linked to form a gel, and after being injected into the water-containing formation, the gel can realize strong retention around a wellbore, and can be cured under formation conditions to form a lost-circulation material, which finally blocks the lost-circulation formation. The lost-circulation material of the present invention has remarkable improvements in water dilution resistance, interfacial bonding strength, high temperature resistance and the like.
Inventors:
LI DAQI (CN)
LI FAN (CN)
LIU JINHUA (CN)
JIN JUNBIN (CN)
CHEN ZENGWEI (CN)
SONG BITAO (CN)
ZHANG DUJIE (CN)
ZHANG FENGYING (CN)
LI FAN (CN)
LIU JINHUA (CN)
JIN JUNBIN (CN)
CHEN ZENGWEI (CN)
SONG BITAO (CN)
ZHANG DUJIE (CN)
ZHANG FENGYING (CN)
Application Number:
PCT/CN2023/114609
Publication Date:
March 14, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC PETROLEUM ENGINEERING TECH RESEARCH INSTITUTE CO LTD (CN)
SINOPEC PETROLEUM ENGINEERING TECH RESEARCH INSTITUTE CO LTD (CN)
International Classes:
C09K8/44; C09K8/42; C09K8/467; C09K8/512; C09K8/514
Foreign References:
| CN112280543A | 2021-01-29 | |||
| CN110734754A | 2020-01-31 | |||
| CN114591718A | 2022-06-07 | |||
| US20070187098A1 | 2007-08-16 | |||
| US6011075A | 2000-01-04 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
Download PDF:
Previous Patent: MULTI-LEAD ELECTROCARDIOGRAPHIC METHOD AND ELECTRONIC DEVICE
Next Patent: LAUNDRY DEVICE
Next Patent: LAUNDRY DEVICE