Table 1 Input parameter table for Att-LSTM neural network pressure real-time prediction model.
From: Real-time warning method for sand plugging in offshore fracturing wells
Parameter | Unit | Parameter attribute |
|---|---|---|
hour | hh | Original parameter |
minute | mm | Original parameter |
second | ss | Original parameter |
Pressure, p | MPa | Original parameter |
Displacement rate, q | m3/s | Original parameter |
Sand concentration, s | kg/m3 | Original parameter |
Accumulated sand concentration | kg/m3 | Extended parameter |
Mean pressure,‾f|p | MPa | Extended parameter |
Mean sand concentration,‾f|s | kg/m3 | Extended parameter |
Pressure deviation, d|p | MPa | Extended parameter |
Sand concentration deviation, d|s | kg/m3 | Extended parameter |
Absolute value of pressure deviation, |d|p| | MPa | Extended parameter |
Absolute value of sand concentration deviation, |d|s| | kg/m3 | Extended parameter |
The average rate of pressure changes at j = 20,\(\frac{\Delta f}{{\Delta t}}\left| {_{p,20} } \right.\) | MPa | Extended parameter |
The average rate of displacement rate changes at j = 20,\(\frac{\Delta f}{{\Delta t}}\left| {_{q,20} } \right.\) | m3/s | Extended parameter |
The average rate of sand concentration changes at j = 20,\(\frac{\Delta f}{{\Delta t}}\left| {_{s,20} } \right.\) | kg/m3 | Extended parameter |
The average rate of pressure changes at j = 30,\(\frac{\Delta f}{{\Delta t}}\left| {_{p,30} } \right.\) | MPa | Extended parameter |
The average rate of displacement rate changes at j = 30,\(\frac{\Delta f}{{\Delta t}}\left| {_{q,30} } \right.\) | m3/s | Extended parameter |
The average rate of sand concentration changes at j = 30,\(\frac{\Delta f}{{\Delta t}}\left| {_{s,30} } \right.\) | kg/m3 | Extended parameter |
