The Application Of Wide Azimuth Seismic Data In Reservoir Prediction

Compared with the narrow azimuth seismic data, wide azimuth seismic data have better detection ability of facture or reservoir and the imaging resolution etc. In this paper, the core is the characteristics and application of wide azimuth seismic data based on the actual wide azimuth seismic data of Well MH1 in MN area of Jung Gar basin, and studying on the wide azimuth seismic data interpretation and application of the methods to reservoir prediction and strike slip faults.This paper discusses the P-wave azimuthal anisotropy property of faults and fractures under the observation of different directions. For coherency and curvature attributes, when the observation direction perpendicular to the direction of small faults can get a clear imaging. When the observation direction is oblique to small faults cannot be a well imaging. P-wave reflection amplitude is related to line and fracture azimuth. When line parallel to fracture strike, the amplitude increases strongly. When line has the angle to the fracture strike, the amplitude decreased gradually. Base on the P-wave azimuthal anisotropy, the processing and interpretation are carried out for the azimuth data, such as coherent superposition, curvature direction, amplitude weighted coherent attribute extraction and interpretation. Taking the strike slip fault Sylvester simple shear model as a guide, combining with the study of tectonic evolution background, strike slip faults in the Well MH1 area were explained and the fractures were predicted. Based on the wide azimuth data ratio data, using waveform classification, attribute analysis, sparse pulse inversion and neural net-work techniques such as well logging parameter inversion, the good reservoirs were predicted. The results from the wide azimuth data prediction show well based on the drilling results, and the characteristics of the real stacked sand reservoirs are with better prediction.This study explains successfully North-east strike slip fault system in Well MH1,makes implementation of the 7 fault block traps, about 26.7km2, and detects the fracture zones with near east-west and nearly parallel to the strike slip faults associated faults. Stacked reservoir sand bodies are located in the relatively higher area in Well MH1-MH4 and Well MH2. The results have been providing favorable support for the exploration and deployment of the study area.