Cyclic 1D matching of time-lapse seismic data sets: A case study of the Norne Field |

(1) |

For small perturbations , and , we can write

(2) |

where, is the vertical ``depth'' strain and is the apparent ``time'' strain. The -factor (Hatchell and Bourne, 2005a) relates the fractional change in velocity to the depth strain and time strain :

The -factor can be measured from core samples in the laboratory (Hatchell and Bourne, 2005a; Bathija et al., 2009), derived from the estimated time-shifts (Hawkins et al., 2007), or derived from other production-related data (Hodgson et al., 2007). For most reservoir rocks, values of to have been shown to be reasonable (Hodgson et al., 2007; Hatchell and Bourne, 2005b). In this paper, a constant value of is assumed.

Cyclic 1D matching of time-lapse seismic data sets: A case study of the Norne Field |

2010-05-19