Fluid Identification Based on Pre-stack Elastic Integration in Carbonate Reservoir - A Case Study in Tahe Oilfield

Elastic information carries important information concerning subsurface fluid types. It is highly valued by seismic exploration industry. Compared with other methodologies (e.g. 9C VSP and 3D3C), pre-stack P-wave methods are extensively employed in addressing reservoir and fluid prediction, due to its wide availability of data. However, many traditional technologies can hardly extract accurate P-wave and S-wave information from conventional pre-stack PP data. In this paper, the concept of pre-stack elastic integration is proposed, which emphasizes comprehensive interactions among rock physics, amplitude-preserved processing and inversion algorithm. Then, pre-stack elastic integration is applied to Ordovician carbonate cave reservoirs in Tahe Oilfield, by which fluids can be identified with high precision.