Compact reservoir production prediction method and device

Abstract

The invention provides a compact reservoir production prediction method and device. The method comprises the steps that a three-dimensional network model of a core sample of a to-be-analyzed region isestablished; fluid flow simulation is carried out on the three-dimensional network model to obtain a permeability relative permeability curve, a permeability capillary pressure curve, a displacementrelative permeability curve and a displacement capillary pressure curve of the three-dimensional network model; according to the permeability relative permeability curve, the permeability capillary pressure curve, the displacement relative permeability curve and the displacement capillary pressure curve, a mine field scale dual-medium model of the to-be-analyzed region is established; a matrix layer and a crack layer of the mine field scale dual-medium model are subjected to crack network encryption and region division respectively, and a mine field scale volume transformation model is obtained; production simulation is conducted according to the mine field scale volume transformation model, and production prediction is performed on the to-be-analyzed region. By utilizing the method, the accuracy of a compact reservoir volume transformation model can be improved, and the accuracy of production and prediction of a compact reservoir is further improved.

Description

technical field [0001] The application belongs to the technical field of oil and gas development, and in particular relates to a tight reservoir production prediction method and device. Background technique [0002] In recent years, with the deepening of exploration and development of global oil and gas resources, the usable oil and gas resources have gradually deepened from conventional high-permeability reservoirs to low-permeability and tight reservoirs. The research on oil and gas recovery of tight reservoirs has gradually become an important work in the field of oil and gas development technology. The rapid drilling of horizontal wells and staged fracturing technology can be effectively combined to expand the contact area and volume between fractures and crude oil, increase the effective volume of the fracturing process, and rapidly increase oil and gas production. This process can be called For volume transformation technology. [0003] In the prior art, the producti...

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Problems solved by technology

However, these two modeling methods have their own limitations. The first modeling method only considers the properties of the matrix, which is relatively rough and cannot describe the details of fracturing stimulation. The accuracy of the model has great uncertainty.

The second modeling method is too detailed, so many fracture parameters (such as fracture spacing, fracture dip angle, azimuth, fracture density, etc.) Provide such parameters

On the one hand, the properties of mercury are quite different from the conventional non-wetting phase, and the accuracy of the experimental results is in great doubt; Long time, not operable

The above methods affect the accuracy of the volume fracturing model, and further affect the accuracy of tight reservoir production prediction

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