冻结井内层可缩性井壁监测系统和监测预警方法
By constructing a wellbore monitoring system with a feature parameter matrix and dynamic gain logic, the physical lag and false alarm problems of wellbore monitoring in traditional methods are solved, and accurate assessment and reliable early warning of wellbore status are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI UNIV OF SCI & TECH
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for monitoring the wellbore wall in frozen wells cannot accurately capture the nonlinear distortion of early micro-strain in the wellbore. Traditional methods lack vector synthesis and dynamic gain logic for multivariable physical characteristics, resulting in physical lag and frequent false alarms in the assessment results, making it difficult to accurately quantify the instability boundary of the wellbore in deep formations.
A feature parameter matrix is constructed, and the coupled gradients of wellbore displacement, temperature gradient and interwall pressure are extracted through vector synthesis and dynamic gain logic. Dynamic alarm feature thresholds are generated by combining nonlinear mapping functions and feedback adjustment factors to achieve real-time assessment and early warning of wellbore status.
It improves the sensitivity and foresight of wellbore instability monitoring, avoids frequent false alarms, achieves reliable early warning under complex alternating loads, and can identify wellbore entering dangerous critical zones in advance.
Smart Images
Figure CN122192444B_ABST