Fracture Detection Based On Post-stack Seismic Data

Fracture is an important reservoir space and hydrocarbon migration channel.Developed fracture in reservoir helps to improve the performance of the reservoir,so the research for fracture detection has always been the hot spots in academia.Research on seismic identification and detection technology for fractured reservoir in home and abroad has been carried out for long time.But because the fractured causes and scale problems and the complex relationship between seismic response and fracture,fracture prediction by seismic data is still in progress and subsequent development stage.Fractured reservoirs will be the important growth point in global oil and gas production in the 21 st century.Using geophysical method detection,fracture identification and description is the most effective means.In well logging,imaging logging can effectively identify the part of the fracture development and the different types of fracture.In addition,shear wave splitting can identify the parts of fracture development,because of the economic and environmental problem,using P wave is more common method in fractrue detection.Post-stack attribute analysis and tectonic stress field analysis can effectively predict the fracture development zone.This article is in this way.As the tectonic fracture count most in Aonan region,some seismic attributes which is sensitive to fracture properties is extracted,such as coherence,RMS,instantaneous frequency,arc length,energy,ants,with the method of multiple attribute conjoint analysis,fracture development area can be qualitatively detected.With lithology data of fracture,through the tectonic stress field numerical simulation,the analysis of the region area in ancient and modern stress include major and minor stress distribution is complete.According to the quantitative relationship of stress and fractur e parameters,the site of fracture development are presented.Combined the methods,a set of effective process of comprehensive predicting fracture development zone is established.Applying the research results to Aonan low permeable oil fields,the techni cal support for the region of fracture prediction and reservoir description can be strongly provided.