Wide-Azimuth Seismic Processing Method for Shale Oil Exploration

Abstract

Continental shale oil has become a major replacement area for increasing oil and gas reserves and production in China. Accelerating the research on exploration and development technology of continental shale oil in China is the key to improving shale oil production. Shale oil reservoirs have strong heterogeneity, it is hard to describe the "sweet spots", and higher imaging accuracy is required as well. Therefore, the use of wide-azimuth seismic data to develop research on shale oil reservoir anisotropy and resolution improvement is the key to improve the shale oil reservoirs imaging. In this paper, taking the Y3 study area in the Qijiagulong sag, Songliao Basin, eastern China as an example, by analyzing the wide-azimuth seismic raw data (including static correction, signal-to-noise ratio, frequency, etc.), the targeted processing technology of wide-azimuth data in the study area is determined. Better imaging results have been achieved, the frequency band of the wide azimuth processing section is 11Hz wider than that of the conventional processing section, and the favorable area of "sweet spot" is comprehensively predicted by using the data after wide-azimuth processing.