Wave-equation inversion of time-lapse seismic data sets |

(A-29) |

Using the same assumptions and procedure as in the previous section, we arrive at the following formulation:

(A-30) |

where the baseline and monitor velocities are known. Where the monitor has been aligned with baseline, we have

(A-31) |

which holds approximately whether or not we migrate the monitor data with the baseline or monitor velocity.

2011-05-24