Automatic historical fitting method for water injection numerical simulation of fractured-vuggy oil reservoir

A technology of numerical simulation and history matching, applied in electrical digital data processing, instruments, computer-aided design, etc., can solve the problem that the combination process depends on the operator's perceptual knowledge and personal experience, and achieve the effect of automatic modification and rapid determination

Inactive Publication Date: 2020-06-26
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] Therefore, the traditional numerical simulation method requires multiple manual simulation attempts on various parameters such as the size of the fracture-vuggy body, fracture communication status, rock properties, and fluid properties during the history matching process, and the combination process is greatly dependent on the operator. perceptual knowledge and personal experience

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  • Automatic historical fitting method for water injection numerical simulation of fractured-vuggy oil reservoir
  • Automatic historical fitting method for water injection numerical simulation of fractured-vuggy oil reservoir
  • Automatic historical fitting method for water injection numerical simulation of fractured-vuggy oil reservoir

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[0021] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0022] The present invention provides a method for automatic history fitting of numerical simulation of water injection in fracture-cavity reservoirs based on an improved neural network, comprising the following steps:

[0023] S1. Construct a numerical model of water injection in fractured-vuggy reservoirs, and collect basic parameters of the model. Numerical model of fractured-vuggy reservoir established under the water injection development mode, see figure 1 . Load the daily water production data, gas production data, oil production data and wellhead pressure change data after water flooding development, see figure 2 ; sort out the volume model of the model c...

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Abstract

The invention discloses an automatic historical fitting method for water injection numerical simulation of a fractured-vuggy oil reservoir. According to the method, a fractured-vuggy type oil reservoir water injection numerical simulation automatic historical fitting index system composed of fractured-vuggy type oil reservoir space medium characterization indexes and water injection oil displacement seepage key indexes is constructed; the sensitivity of an index system in an initial reasonable range is calculated, a linear difference calculation method is adopted, a characteristic index sensitivity coefficient curve in a corresponding value range is obtained through calculation, and the characteristic index sensitivity coefficient curve serves as a sensitivity factor to be introduced intoa neural network hidden layer and participates in iterative regression calculation. Aiming at the fractured-vuggy type oil reservoir water injection numerical simulation historical fitting problem, automatic historical fitting can be achieved, and the fitting quality and the reliability degree of a final model are improved.

Description

technical field [0001] The invention relates to the technology in the field of fracture-cavity reservoir development, in particular to a method for automatic history matching of numerical simulation of water injection in fracture-cavity reservoirs. Background technique [0002] The numerical model of oil and gas reservoirs is accurately verified and adjusted through the history matching process, so that it can truly reflect the seepage situation of the formation. Usually after the geological model is established, the numerical model is constructed through the process of model roughening, rock parameter testing, fluid parameter testing and loading of production data. However, the rationality of different parameters and the compatibility with the model are usually uncertain, so, It is necessary to accurately adjust the seepage process fed back by the numerical model through the history fitting process, so that it can finally fully reflect or reflect the actual situation of for...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F119/14G06F113/08
Inventor 邓鹏彭小龙朱苏阳王超文李小波窦莲
Owner SOUTHWEST PETROLEUM UNIV
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