Research and application of 5D seismic prediction technology

Abstract

With the development of wide orientation, wide band, and high-density acquisition and processing technology, the original 3D (time, line number, and track number) seismic data have expanded to two dimensions — the addition of offset distance information and azimuth information, resulting in 5D seismic data. In this paper, we explore three aspects. Identifying microfaults through subazimuth superposition and poststack coherent body techniques; predicting fractures by means of prestack anisotropy, poststack dip, azimuth, coherence, and curvature; and inscribing river channels with pure longitudinal wave near-zero incidence angle reflection information — that is, the exploration of 5D seismic prediction techniques. The field application in different types of geologic bodies in the Lujabao Depression and the Ordos Basin and the accuracy of reservoir prediction and the degree of implementation of microfaults have been greatly enhanced, effectively guiding the deployment of wells and improving the drilling success rates.