Pre-stack Seismic Inversion for Identification of Complex Thin Sandstone Interlayers - A Case Study

Thin sandstone interlayers in the continental rift basin form an important type of oil/gas reservoir in the world. Hence, it is of great importance to identify these thin interlayers in the seismic exploration. In this paper, we carry out a case study for the sandstone interlayer identification in a reservoir of China. A workflow including rock physics modelling, pre-stack space-variant inversion, and Bayes identification of interlayers is proposed, based on which the distribution of the clean sandstone interlayers is predicted. The exploration wells are then deployed based on the prediction results and the sandstone interlayers containing high content of oil and gas are successfully drilled.