Fracturing fracture parameter inversion method based on production dynamic automatic history fitting

Abstract

The invention belongs to the field of petroleum engineering, and particularly relates to a fracturing fracture parameter inversion method based on production dynamic automatic history fitting. The method includes the steps that step one, an embedded discrete fracture model is applied to the subdivision of a reservoir, and flow between a transmissibility coupling fracture and a matrix is calculated; step two, a three-dimensional earthquake monitoring model is established, and reservoir changes are simulated; step three, a complex fracture network generation method is established according to afracture form and a discrete fracture inversion algorithm; and step four, a discrete network deterministic inversion algorithm is constructed. According to the fracturing fracture parameter inversionmethod based on the production dynamic automatic history fitting, compared with the prior art, a complex fracturing fracture network is regarded as a discrete fracture network composed of a pluralityof small fracture sections, a three-dimensional monitoring technology is utilized, the discrete network deterministic inversion algorithm is combined for inverting a fracture network form, and the fine fracturing fracture form is described, so that the fracturing effect is evaluated more accurately, and a reference is provided for subsequent development of an oil field.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a fracturing fracture parameter inversion method based on automatic history matching of production dynamics. Background technique [0002] With the depletion of conventional energy in the world, unconventional energy has gradually attracted people's attention, and tight oil and gas reservoirs are an important part of unconventional energy. The proven tight reservoir reserves in China are very rich, and the pores of tight reservoirs It is very difficult to exploit such extremely low-permeability reservoirs if the degree is less than 0.1 and the permeability is less than 0.1mD, so fracturing technology is widely used in the exploitation of low-permeability reservoirs; [0003] Fracturing fractures exist in oil and gas-rich areas of the reservoir or meet the fracturing optimization plan to become the main driving force for reservoir production. However, the current f...

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Problems solved by technology

[0003] Fracturing fractures exist in oil and gas-rich areas of the reservoir or meet the fracturing optimization plan to become the main driving force for reservoir production. However, the current fracturing monitoring technology can only provide a rough outline of the fracturing fractures, and it is difficult to accurately describe the fracturing fractures. concrete form

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