Multi-scale fractured reservoir forward model establishing method

Abstract

The invention relates to the field of exploration geophysical data processing methods, and particularly relates to a multi-scale fractured reservoir forward model establishing method. First, a laterally heterogeneous model for a predominant reservoir is established by using interval velocity data based on the seismic velocity spectrum, P-wave impedance inversion data, and lithologic inversion data; then, the geometrical shape of a fracture is determined by a seismic detection method for different scales of seismic curvature or seismic coherence, and the fracture is given geophysical parameters based on well shock and is embedded to the obtained laterally heterogeneous model; and finally, a laterally and longitudinally heterogeneous multi-scale fractured reservoir model is established. The fractured reservoir model established by the method fully utilizes well shock data, truly reflects the development regularity and distribution characteristics of the fracture, and provides a basis for performing fractured reservoir forward modeling in the next step, understanding the wave field response characteristics and geophysical attributive characteristics of a fractured reservoir and improving the accuracy of reservoir prediction.

Description

technical field [0001] The invention relates to the field of exploration geophysical data processing methods, in particular to a multi-scale fracture reservoir forward model establishment method. Background technique [0002] Fractured oil and gas reservoirs are formed in various rocks such as mud shale, metamorphic rock and carbonate rock. Fracture itself can be used as a storage space to store oil and gas, and can also be a channel for oil and gas migration, which is an important type of storage space. There are generally two ways to establish the fracture forward model commonly used at present: 1. The more commonly used ones are anisotropy theory and fracture equivalent theory. Both thin and fractured reservoirs are considered to be anisotropic in general. The relationship between the fracture model parameters and the anisotropy parameters is established through the equivalent theory, and then the numerical simulation is carried out using the anisotropy forward modeling...

AI Technical Summary

Problems solved by technology

This method directly establishes the fracture model. To establish a high-precision fracture model, the model grid is required to be small, which requires a lot of computer memory, and the calculation rate is very slow.

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