Abstract: The 3D geologic reservoir modeling is used to characterize the geologic characteristics of reservoir in three dimensions, and it provides the basis for revealing reservoir characteristics and searching for favorable targets in the process of exploration and development. In the Longgang gasfield, the Sichuan Basin, oolitic-beach carbonate reservoirs are strongly heterogeneous and the well pattern density of the study area is low. In view of these characteristics, a series of facies-control carbonate reservoir modeling technologies were developed with individual-well interpretation data as the hard data and seismic attribute volume data as the constraints. These technologies integrate geologic, drilling, logging, and seismic data. With this method, the advantage of small-scale vertical fine well data and the high lateral resolution of seismic data are combined effectively to improve the inter-well prediction rationality and the geologic model accuracy. The three-dimensional distribution characteristics of reservoirs are reproduced by the modeling results, thus providing a valuable basis for the detailed prospecting, formlation and adjustment of development plans.

Key words: Longgang gasfield, oolitic beach, carbonate reservoir, seismic attribute volume, 3D geologic modeling