一种气侵条件下深海超浅气层井筒温压场预测方法和系统
By establishing wellbore temperature and pressure field models and coupling the energy conservation of the drill string, annulus, and pipe wall, the effects of gas intrusion are accurately simulated, solving the problem of insufficient accuracy in wellbore temperature and pressure field prediction in existing technologies. This achieves high-precision temperature and pressure distribution prediction, supporting safety assessment and risk warning for complex drilling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HAINAN TROPICAL OCEAN UNIV
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing wellbore temperature and pressure field prediction technologies lack accuracy under complex drilling conditions, especially in scenarios with the risk of gas intrusion in deep-sea ultra-shallow gas layers. They fail to fully consider the energy conservation of drill string fluid, annular fluid, and pipe wall, and fail to clearly distinguish the flow characteristics of single-phase flow in the drill string and multiphase flow in the annular region.
A wellbore temperature field model and a pressure field model were established, and the energy conservation of drill string fluid, annular fluid and pipe wall were coupled respectively. The single-phase flow region of drill string and the multiphase flow region of annular flow were distinguished. The effects of heat exchange and gas intrusion were accurately simulated by iterative coupling solution method, and the gas properties were updated in real time using the ideal gas law.
It significantly improves the prediction accuracy of temperature and pressure fields, enabling a more realistic depiction of the thermodynamic and hydrodynamic processes in the wellbore, providing high-precision temperature and pressure distribution, and offering reliable data support for safety assessment and risk warning in complex drilling scenarios.
Smart Images
Figure CN122196462B_ABST