This research has received support from the Research Council of Norway for the Petromaks II project 267769/E3 (Bayesian inversion of 4D seismic waveform data for quantitative integration with production data).When starting to write my PhD thesis and looking back to the past two and half years of my PhD studies, I realize that it would not have been possible to finish my PhD without the help of many friends and colleagues.Firstly, I would like to express my deepest gratitude to my supervisor Morten Jakobsen, for giving me the opportunity to pursue PhD studies at University of Bergen and collaboration research at University of California, Santa Cruz, and for guiding me throughout the PhD studies. I would say I am lucky to meet such a supervisor. Morten is very clever and nice supervisor, who is not only my supervisor but also my good friend, helping me from work to life. My words cannot express how blessed I am your PhD student.