Nonequivalent modeling method and device for heterogeneous reservoir stratum

Abstract

The embodiment of the invention provides a nonequivalent modeling method and a device for a heterogeneous reservoir stratum. The nonequivalent modeling method comprises the following steps: selecting a field outcrop of the heterogeneous reservoir stratum and analyzing the field outcrop to obtain an internal structure of the heterogeneous reservoir stratum; collecting imaging logging data, carrying out statistic analysis on the imaging logging data, dividing the heterogeneous reservoir stratum into a cave type, a fracture type and a fracture-cave type; and collecting conventional logging data and determining elastic parameters of a fracture-cave body in different positions according to the logging data so as to form a nonequivalent model of the heterogeneous reservoir stratum. According to the nonequivalent modeling method and the device disclosed by the invention, by analyzing the imaging logging data, the trend and distribution characteristics of fracture and caves of a carbonatite heterogeneous reservoir stratum are researched in microcosm and the guarantee can be provided for finely engraving the fracture-cave body; and according to the statistical analysis of the logging data, all elastic parameters of the fracture-cave reservoir stratum are accurately positioned.

Description

technical field [0001] The invention relates to the field of oil and gas field exploration, in particular to a non-equivalent body modeling method and device for heterogeneous reservoirs, which are suitable for the understanding of seismic wave field propagation, the study of seismic response characteristics of carbonate reservoirs and the The identification of favorable targets in salt rock reservoirs is an improvement on conventional modeling methods. Background technique [0002] Ordovician fractured-vuggy carbonate reservoirs in western China have become a hotspot in exploration and development. The complex diagenesis and reservoir space evolution history lead to its unique reservoir space dominated by fractured caves. Compared with traditional clastic rock reservoirs, fracture-cavity reservoirs have stronger heterogeneity. Therefore, how to effectively describe and understand the propagation of seismic waves in heterogeneous carbonate reservoirs is crucial in seismic ex...

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Problems solved by technology

That is to say, the inventor found through research in the process of realizing the present invention: the prior art mainly considers the equivalent velocity of the whole fracture and cave reser

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