The Inversion Method of Thin Interbedded Reservoir Based on Spectrum Expansion Seismic Data
B. Wang, J.A. Xie, T.G. Wei and J.G. Ma
Event name: 81st EAGE Conference and Exhibition 2019
Session: Poster: Dynamic Reservoir Characterization and Modelling A
Publication date: 03 June 2019
Info: Extended abstract, PDF ( 1.19Mb )
Price: € 20
Thin interbed refer to a layer combination of different lithology less than tuning thickness. Due to the tunable interference of seismic waves between thin layers, the seismic wave field is complex, and it is difficult to effectively characterize the development and transverse distribution of thin interbeds. In this paper, to solve the problem, based on the framework of Bayesian theory, firstly the logging information was converted to the geological statistics prior information in the spectral inversion, the spectrum of seismic data was expanded, then wave impedance inversion data was obtained from the spectrum expanded data using Bayesian wave impedance inversion method so as to achieve effective characterization of thin interbeds. The method was applied to thin interbedded sandstone oil reservoirs developed in Guantao formation in Miaoxi area of Bohai oilfield, a lot of thin sand bodies which can not be described by conventional data with thickness of 5m were successfully characterized by this method, providing a high-precision data support for exploration and development in this region.