| In the past few years, time-lapse seismic technology has been a rapid developing area in the oil exploration industry. It helps us to understand fluid movements within the reservoir and optimize the production of oil fields.;We review the rock physical basis for the time-lapse technologies. To attenuate the noise effects, which are caused by non-repeatability, in the inversion, a structural constraint is introduced. This constraint is combined with sparseness and impedance constraints and applied to time-lapse data. Finally, we investigate the three inversion schemes for time-lapse data.;Time-lapse inversion is a two-stage inversion. First stage is to estimate seismic attributes, for example impedance, velocity etc., from the seismic data. The second stage is to estimate the reservoir physical parameters such as porosity and saturation. In this thesis, we focus on the first stage. The research is divided into two categories: regularization techniques and inversion work-flows for time-lapse data. |
