Page 68 - Reservoir Geomechanics
P. 68

a.   W                 Shot Number           E
                   1300    1400    1500    1600     1700    1798
                   0                                         0
                  500
                 1000                                        3000
                 TWTime (ms)  1500                              SSTVD (ft)

                 2000
                                                             7000
                 2500

                 3000                                        11000
                 3500
                     Line 15490 RMS Velocity  10000 ft


               b.   W                 Shot Number           E
                   1300    1400    1500     1600    1700    1798
                  0                                           0
                 500
                 1000                                        3000

                TWTime (ms)  1500                            7000  SSTVD (ft)
                 2000

                 2500
                                                             11000
                 3000
                 3500
                     Line 15490 RMS Velocity  10000 ft


               c.   W                 Shot Number
                   1300      1400     1500     1600      1700
                 1000
                 2000

                 3000
                 4000
                SSTVD (ft)  5000

                 6000
                 7000
                 8000
                 9000

                     Line 15490 Pressure Profile  10000 ft
                                              6      9      12 ppg
              Figure 2.17. Pore pressure estimation from seismic reflection data along an E–W seismic line in the
              SEI-330 field (after Dugan and Flemings 1998). (a) Stacking, or RMS, velocities determined from
              normal moveout corrections. (b) Interval velocities determined from the RMS velocities (c) Pore
              pressures inferred from interval velocity in the manner discussed in the text.
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