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Parameter automatic reversing method and parameter automatic reversing device

A parametric and automatic technology, applied in the direction of complex mathematical operations, electrical digital data processing, special data processing applications, etc., can solve the problems of many calculation parameters and long calculation time, and achieve the effect of reducing work intensity and improving efficiency

Active Publication Date: 2018-11-13
HEFEI UNIV OF TECH
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Problems solved by technology

However, numerical well testing also faces a series of difficulties, such as many calculation parameters and long calculation time

Method used

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  • Parameter automatic reversing method and parameter automatic reversing device
  • Parameter automatic reversing method and parameter automatic reversing device
  • Parameter automatic reversing method and parameter automatic reversing device

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Experimental program
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Embodiment Construction

[0041] In the existing numerical well test interpretation method, firstly, the well test interpreter sets the value of the parameter to be obtained (also called the parameter to be explained or the uncertain parameter), and according to the current setting of each parameter to be obtained The calculated pressure is calculated by the parameter value, and the calculated pressure is compared with the measured pressure. After that, based on the comparison result, the well test interpreter manually adjusts one or more of the parameters to be obtained based on their own experience, according to the current settings Obtain the parameter values ​​of the parameters to solve the calculated pressure, compare the calculated pressure with the measured pressure again, and repeat the manual adjustment process as described above to make the calculated pressure as close to the measured pressure as possible. When the difference between the calculated pressure and the measured pressure satisfies a...

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Abstract

The invention discloses a parameter automatic reversing method, and the method comprises the following steps: after receiving a numerical range of a to-be-obtained parameter input by a well testing interpretation worker and a numerical range of each to-be-obtained parameter, performing sampling for the to-be-obtained parameter within the corresponding numerical value range, and obtaining multipletrial calculation examples; then, respectively calculating the multiple trial calculation examples, and obtaining corresponding calculated pressure data, fitting for multiple groups of the calculatedpressure data, thereby constructing multiple response surface models; and then, through the multiple response surface models, constructing an objective function capable of indicating deviation betweenthe calculated pressure data and the actually measured pressure data, obtaining an optimal solution of the to-be-obtained parameter through solving a minimum value of the objective function, whereinthe optimal solution is an interpretation result of each to-be-obtained parameter. Based on the parameter automatic reversing method disclosed by the invention, efficiency of numerical well testing interpretation can be improved, and work intensity of the well testing interpretation work can be reduced at the same time. The invention also discloses a corresponding parameter automatic reversing device.

Description

Technical field [0001] This application belongs to the field of petroleum exploitation technology, and in particular relates to a method and device for automatically reversing parameters. Background technique [0002] In the process of oil extraction, some engineering problems will be encountered, such as how to estimate the output of oil wells. This requires the establishment of a reliable geological model to make further predictions. Therefore, it is necessary to know the reservoir strata and wellbore parameters. Well testing is the most commonly used method to obtain formation and wellbore parameters during reservoir development. Generally speaking, well test analysis is to analyze and calculate the formation and wellbore parameters based on the measured bottom hole pressure, temperature or flow rate, so as to provide services for describing the dynamic characteristics of the reservoir, medium and long-term productivity prediction, and productivity optimization. [0003] Numer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06F17/50
CPCG06F17/10G06F30/20G06F2119/06
Inventor 查文舒李道伦陈刚曾亿山卢德唐
Owner HEFEI UNIV OF TECH
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