Dual medium numerical reservoir simulation parameter adjusting method

A numerical simulation, dual-medium technology, applied in the fields of earthwork drilling, electrical digital data processing, special data processing applications, etc., can solve the problems of cumbersome, lack of guidance for adjusting parameters, and no combination of reservoir production characteristics, etc., to improve scientific performance, improved productivity and accuracy

Inactive Publication Date: 2018-12-04
PETROCHINA CO LTD
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Problems solved by technology

[0004] On the one hand, the size and distribution of fractures in dual-media reservoirs are chaotic. On the other hand, numerical simulation production history matching is an extremely cumbersome and working process. The previous method of adjusting parameters for numerical simulation history matching of dual-media reservoirs completely relied o

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  • Dual medium numerical reservoir simulation parameter adjusting method
  • Dual medium numerical reservoir simulation parameter adjusting method
  • Dual medium numerical reservoir simulation parameter adjusting method

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Embodiment

[0052] The "a method for adjusting parameters in numerical simulation of dual-media reservoirs" described in the present invention will be further described in conjunction with specific examples below.

[0053] (1) Establishment of conceptual model for reservoir numerical simulation

[0054]Firstly, three theoretical models were established: dual-porosity and dual-permeability model (fracture-pore type), single-porosity and single-permeability model (pore type), and dual-porosity and single-permeability model (fracture type), to study reservoir production characteristics and differences among the models.

[0055] In the three models, the production well is A1, the water injection well is A2, and the well spacing is 250m. The grid number is 17*14*1, the model grid step size is 20*20m, the formation thickness is 10m, and the net-to-gross ratio is 1. The initial average formation pressure is 20.3MPa; there is boundless water and bottomless water. The oil-water relative permeabi...

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Abstract

The invention discloses a dual medium numerical reservoir simulation parameter adjusting method, comprising the following steps: step A, establishing an oil reservoir three-dimensional geological conceptual model; step B, establishing an oil reservoir numerical simulation model; step C, performing numerical reservoir simulation research using the conceptual model; step D, establishing a water-containing and reserve recovery degree relationship plate; step E, comparing actual production data with the plate, determining a reservoir pore structure type near a well point; step F, guiding correction of a geological parameter in a production history fitting process according to a determined pore structure type. The method is based on a theoretical model, oil reservoir production characteristicsare tightly associated with reservoir development characteristics, and reservoirs are classified through the theory plate, and main controlling factors influencing oil reservoir production are made clear. The method develops pointed parameter adjusting fitting, improves scientificity of history matching parameter adjusting, so as to greatly improve working efficiency and accuracy of dual medium numerical reservoir simulation history matching.

Description

technical field [0001] The invention relates to a simulation parameter adjustment method, in particular to a dual-media reservoir numerical simulation parameter adjustment method, which belongs to the technical field of reservoir engineering research and application. Background technique [0002] Due to the complex distribution of fracture-matrix relationship and various seepage capabilities in dual-media reservoirs, there is strong heterogeneity in the plane and vertical directions. In some parts, fractures are relatively developed, while in some parts, fractures are relatively undeveloped; in some parts, both fractures and matrix have fluid seepage, while in some parts, only fractures are permeable, and fluid seepage does not occur inside the matrix. [0003] In the existing technology, production history matching is mainly performed by adjusting fracture parameters. For example, Zheng Qiang pointed out in the article "Discussion on Numerical Simulation Methods for Fractur...

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Application Information

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IPC IPC(8): G06F17/50E21B43/16
CPCE21B43/16G06F30/20
Inventor 孟立新段英豪郭奇姜瑞忠张志明高淑芳孟立娜
Owner PETROCHINA CO LTD
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