Identification method of indicator diagram by interpreting the measured results of gas-dynamic well testing
The relevance of this work is caused by the need to increase informativeness of the results of gas-dynamic well testing in stabilized flow conditions, to reduce the number of modes, duration of testing and gas emissions into the atmosphere. The main aim of the study is to develop a method for identi...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1679 |
| Summary: | The relevance of this work is caused by the need to increase informativeness of the results of gas-dynamic well testing in stabilized flow conditions, to reduce the number of modes, duration of testing and gas emissions into the atmosphere. The main aim of the study is to develop a method for identification and interpretation of the measured results of gas-dynamic well testing by indicator diagram allowing to take into account additional prior information, improve the accuracy of determining the reservoir pressure and flow parameters, reduce the time of testing. The methods used in the study are the theoretical and practical developments in gas-dynamic well testing, system analysis, system identification, optimization of functions and linear algebra. The proposed method is based on using an integrated systems models of indicator diagram with a priori information and expert assessments of reservoir pressure and filtration reservoir parameters. Defining the parameters of the model of indicator diagram, which is represented by the binomial Forchheimer filtering law, and the control parameters that determine the importance (weight) of the expert assessments carried out by solving two optimization problems using quadratic quality indicators. For approbation of the method used production data of stabilized gas-dynamic well testing by indicator diagram and expert assessments of reservoir pressure and filtration reservoir parameters of the gas-condensate field in Tyumen region. The results. The authors proposed to develop a method for identification and interpretation of the measured results of gas-dynamic well testing by indicator diagram, which allows to take into account additional prior information, to determine most accurately the formation pressure and filtration resistance coefficients. The results of data processing of gas-dynamic well testing by indicator diagram have shown that the method can improve the accuracy of determining the reservoir pressure, filtration resistance coefficients, reduce the number of modes and duration of testing. |
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| ISSN: | 2500-1019 2413-1830 |