Application and Effect of Multi-Azimuth AVO Fractural Detection Technique in Wangjiatun Field

Abstract

Reservoirs of Yingcheng group of Wangjiatun gas field are strong non-homogeneouslow porosity and permeability volcanic reservoirs, in which cracks plays a very important role of communication in porosity and corrosion holes, since its dual media features of pores and cracks, between which configuration relations are complex and diverse, using post-stack data has been unable to meet the demands of gas reservoir evaluation to make further fine description of crack and identifying small-scale cracks in terms of quantifying. In the study, we re-sorted azimuth before processing the seismic data, extracted transverse difference properties which are not affected by fluid, finally we characterized the attribute parameters changed after processing in the form of strength, and predicted the development the situation of cracks; Using Multi-azimuthal AVO crack detection technology, we predicted the fracture development situation of the volcanic reservoir of Yingcheng group of Wangjiatun region. Compared to conventional coherent technology, Multi-azimuthal AVO crack detection technology has characteristics of high resolution and identification of small-scale cracks. The Predicted results also have a high degree of agreement with actual well interpret results.

AAPG Datapages/Search and Discovery Article #90217 © 2015 International Conference & Exhibition, Melbourne, Australia, September 13-16, 2015