Conglomerate reservoir pore network model modeling method based on simplified digital core

Abstract

The invention provides a conglomerate reservoir pore network model modeling method based on a simplified digital core, and the method comprises the steps of firstly building a multi-scale pore networkmodel based on the mercury injection test and CT test results of the core, so as to reserve the precision of a high-resolution pore network model, and enable the model to be stronger in capability ofrepresenting a larger-size pore throat; then according to the statistical consistency of the key parameters, a mesoscale pore network model is established, and the model not only can carry out pore-level digital seepage simulation, but also can greatly reduce the digital seepage simulation calculation amount; and finally, adding the gravel characteristic parameters into the macroscale sandstone basic model to establish a macroscale conglomerate model. Compared with the prior art, the method has the advantages that the problems of lack of centimeter-scale pore network modeling methods and inaccurate representation of the digital core technology on the conglomerate complex modal structure are solved, and the application of the digital core technology in guiding conglomerate oil reservoir development is expanded.

Description

technical field [0001] The invention relates to the technical field of conglomerate reservoir digital cores, in particular to a method for modeling a conglomerate reservoir pore network model based on simplified digital cores. Background technique [0002] Many macroscopic properties of the reservoir (such as permeability, capillary pressure, etc.) depend on its microstructure and the physical properties of the solids that make it up and the fluid in the pore space, that is, the microstructure of the rock, the properties of the rock and the fluid are fundamental, Macroscopic properties and phenomena are representations. Therefore, in order to achieve the development goal of greatly enhancing oil recovery, the theoretical research and technical development must not only stay at the macro level, but must go deep into the oil storage and migration space—the interior of porous media, and carry out from the micro level Research. [0003] In order to quantitatively describe the ...

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Problems solved by technology

[0008] In order to solve the above technical problems, the present invention provides a conglomerate reservoir pore network model modeling method based on simplified digital cores to solve the lack of centimeter-scale pore network modeling methods, digital core technology for conglomerate complex modal structure characterization Inaccuracy issues, expanding application of digital core technology to guide development of conglomerate reservoirs

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