A method for zonal hydraulic fracturing and injection for CO2 geological sequestration
By combining zoned hydraulic fracturing with multi-source monitoring and coordinated pressure relief operations, the safety and controllability issues of hydraulic fracturing in carbon dioxide geological storage were resolved. This achieved full-process constraints on bottom hole pressure, fracture height, and abnormal channels, ensuring the safety and controllability of carbon dioxide injection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA UNIV OF MINING & TECH (BEIJING)
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies for carbon dioxide geological storage, hydraulic fracturing may lead to excessive extension of fractures toward the caprock, enhanced anomalous response in adjacent layers, and the formation of potential leakage channels. Furthermore, the lack of multi-parameter joint verification makes it difficult to quantify whether the injection is controllable.
The zoned hydraulic fracturing method is adopted, which divides the area into target modification zone, pressure buffer zone and monitoring protection zone. Combined with multi-source monitoring and coordinated pressure relief operation, the bottom hole pressure, fracture height and abnormal channels are controlled in real time. Formulas are used to calculate parameters and constrain data.
It achieves full-process constraints on bottom hole pressure, fracture height, and abnormal channels, ensuring the controllability and safety of carbon dioxide injection, avoiding the risks of relying on human experience, and realizing quantitative control and orderly recovery of operation.
Smart Images
Figure CN122407150A_ABST