Application of rock physics analysis in pre-stack seismic reservoir prediction
Jiang Ren1,2,3, Zeng Qingcai2,3, Huang Jiaqiang2,3, Gan Lideng1, He Pei2,3
1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
2. Langfang Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Langfang, Hebei 065007, China;
3. Key Laboratory of Geophysical Prospecting, CNPC, Beijing 102249, China
Abstract：The project area is located in the north-west of the Sulige Gas Field. The He8 is a typical reservoir with low porosity, low permeability, high heterogeneity and P wave impedance superposition. So an accurate reservoir prediction cannot be done by methods on post-stack seismic data. Therefore a method for reservoir prediction on pre-stack seismic data is needed to predict gas reservoir with rock physics analysis and prestack seismic inversion, and to provide more information for future exploration. For this propose, this paper focuses on rock physics modeling, seismic processing with logging calibration, and iteration parameter optimization. Accurate S-wave velocity and density logs are calculated for reservoir characterization on prestack seismic data. Furthermore rock physics templates improve the accuracy of gas prediction on prestack seismic inversion.
