Abstract:

Seisnic inversion and geostatistic methods are two important methods for demonstrating reservoir space distribution. The seismic inversion method can properly describe the lateral distribution regularity of thick sand bodies; the geostatistic method can describe vertical changes of thin sand bodies. The combination of these two methods was used to study the reservoir space distribution of Nanpu 35-2 Oilfield, the results suggest that three kinds of contact relations could be found within fluvial facies sand bodies in the study area such as direct connection, superimposition and cut; the space distribution models include a thick sand body with continueous and extensive plane distribution and a thin sand body with banded vertical distribution. The first distribution model reflects the feature of river channel lateral shift and the superimposition and the second distribution model is the result of meandering stream cutoff.

Key words: reservoir space, idistribution, fluvial facies, seismic inversion, geostatistics, combination