Physical simulation and numerical simulation combined measurement method for crack generation full-diameter rock core

Abstract

The invention belongs to the technical field of petroleum engineering, and discloses a physical simulation and numerical simulation combined measurement method for a crack generation full-diameter rock core. Through backward sequential optimization of experiments, a finite number of full-diameter rock core samples are adopted for carrying out orthogonal experimental design to develop related simulation experiments; by utilizing full-diameter rock core artificial cracks, artificial crack full-diameter carbonate rock core samples with different equivalent permeability are obtained; and synchronous fitting and prediction of the physical simulation experiment and numerical simulation are carried out, equivalent permeability parameters of a crack grid during the numerical simulation are obtained through fitting, and a basis is provided for the equivalent permeability value of the crack grid in the numerical simulation experiment. According to the method, a lot of repeated conventional physical simulation experiments can be reduced, so that the research efficiency and the economic benefit are improved; and the specific application of the orthogonal experiment scheme design which combines the physical simulation with the numerical simulation to the water invasion mechanism and water invasion performance research of a complex carbonate rock gas reservoir is illuminated.

Description

technical field [0001] The invention belongs to the technical field of petroleum engineering, and in particular relates to a measurement method combining physical simulation and numerical simulation of a fracture-making full-diameter rock core. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Orthogonal experimental design is an experimental design method for analyzing multiple factors at various levels. It selects some representative experimental samples from comprehensive and systematic experiments based on orthogonality. In experiments, these representative sample points have the characteristics of "uniformly dispersed, neat and comparable". Orthogonal experimental design is an experimental design method to improve experimental efficiency, quickly and economically complete experimental analysis. [0004] At present, for the physical simulation experiment of high temperature and high pressure oil an...

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Problems solved by technology

[0006] (1) Existing full-diameter core experiments have high pressure, high temperature, long experiment cycle, high risk of experiment, high cost of physical experiment input, and high risk factor; a large number of experimental cores are required

[0007] (2) The long rock coring cost of the required fracture-vuggy oil and gas reservoir is high, the number of cores is limited, the high temperature and high pressure physical experiment period of the full diameter core is long, and the cost is high; in the special extreme case of high fracture conductivity and large water body, numerical simulation poor convergence or cause systematic errors, resulting in unreliable simulation results

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