一种含有自催化降解结构的暂堵凝胶及其制备方法
By preparing a temporary plugging gel containing a self-catalytic degradation structure, the problem of the difficulty in spontaneous degradation of existing gel plugging agents in pressurized well workover operations in oilfields has been solved. This achieves low-viscosity injection, controllable gelation, and high plugging strength, adapting to different well conditions with self-degradation effects, and reducing construction difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2023-10-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing gel-based plugging agents are difficult to spontaneously degrade during pressurized well workover operations in oilfields, posing a risk of reservoir contamination. Furthermore, their application is difficult, impacting well production and water injection effectiveness.
The temporary plugging gel system, composed of a main monomer, a functional crosslinking agent, a built-in degradation catalyst, and a reinforcing and toughening agent, achieves controllable degradation of the gel by adjusting the amount and degree of crosslinking of the built-in degradation catalyst. It has a self-degradation function and avoids the use of additional gel-breaking agents.
It achieves low injection viscosity, controllable gelation time and high plugging strength of the gel, and the low viscosity of the degradation product does not affect subsequent water injection. It is adaptable to different well conditions and temperature requirements, reducing construction risks and costs.
Smart Images
Figure CN117362524B_ABST