Research Article
Prediction of Heavy Oil Steam Stimulation Based on Data-Driven and Mechanism Model
| Letter | Physical quantity | Unit |
| hs | The enthalpy of saturated steam at a certain pressure | kcal/kg | | The enthalpy of saturated water under a certain pressure | kcal/kg | | Steam dryness of boiler outlet | Decimal | | Steam dryness of steam injection wellhead | Decimal | L | Length of pipeline | m | is | Saturated steam mass flow rate | kg/h | ql | Heat loss per unit time and unit length of steam pipeline | kcal/(h·m) | P | The pressure at a point in the wellbore | kgf/m2 | Z | Well depth | m | ρm | The density of the saturated steam mixture | kg/m3 | G | Acceleration of gravity | m/s2 | τf | Friction loss gradient | (Kgf/m2)/m | V | The flow rate of the saturated steam mixture | m/h | r2 | The outer radius of the inner pipe | m | U2 | Overall heat transfer coefficient | kcal/(h·m2·°C) | Ts | Steam temperature | °C | Th | Outer-edge temperature of cement ring | °C | | The volume flow of steam | m3/h | Ap | Pipe cross-sectional area | m2 |
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