The technique of digital detailed reservoir characterization

Abstract

Abstract To solve the problem of realizing detailed, digital and integrative reservoir characterization in the mid-late stages of oilfield development, a set of digital methods for detailed reservoir characterization have been established on the basis of specifying the definition of such detailed digital reservoir characterization. The method contains eight steps: (1) the analysis of sedimentation background and environment, (2) the study of isochronous stratigraphic frameworks and detailed structural models, (3) the establishment of reservoir sedimentation models by identifying microfacies, genetic sand units, sand shape and superimposition patterns, (4) the establishment of a prototype model geological database by determining such parameters as the size and development frequency of genetic sand units to provide quantitative parameters for sand-body prediction between wells, (5) high precision seismic reservoir prediction under the control of a sand-body sedimentary model, (6) the establishment of an architecture model of genetic sand units, (7) the analysis of physical parameters of the reservoir and the distribution of fluids in reservoirs, (8) integrative and 3D-visualized reservoir modeling and remaining oil prediction. The core problems and key technologies in each step are specified. The methods can provide a reference to realize detailed digital reservoir characterization and even the construction of a digital reservoir.