Adaptive interpretation of gas-dynamic research of wells identifying the initial area of a pressure recovery curve
The paper introduces and studies the method of adaptive identification and interpretation of the results of gas-dynamics research. Its relevance is caused by the need to reduce well downtime. The base of the method proposed is the integrated system of pressure recovery curve with the variables, time...
| 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/1518 |
| Summary: | The paper introduces and studies the method of adaptive identification and interpretation of the results of gas-dynamics research. Its relevance is caused by the need to reduce well downtime. The base of the method proposed is the integrated system of pressure recovery curve with the variables, time-dependent parameters. The system allows taking into account additional a priori information and restoring the initial part of bottom-hole pressure. The aim of the research is to develop the method of adaptive identification and interpretation which allows determining the parameters of reservoirs and wells at gas-dynamics researches restoring the initial part of the bottom-hole pressure recovery curve and taking into account the additional a priori information. Methods of the research. The authors have applied the theoretical and practical developments in the field of gas-dynamics researches of wells, system analysis, system identification considering additional a priori information, function optimization and linear algebra. The problems were solved on the basis of field data of well exploration in gas condensate deposit by the pressure recovery curve considering expert estimates of the reservoir filtration parameters. The paper introduces the results of comparative analysis of the proposed interpretation method with identification of the initial part of the pressure recovery curve and without its identification as well as the inter pretation results obtained while using the computer program Saphir. Results. The authors developed the method of adaptive interpretation of gas-dynamics research of wells with identification of the initial part of the pressure recovery curve which allows synthesizing a wide range of optimal algorithms for determining the parameters of reservoirs and wells at exploration, determining the time of their completion and considering additional a priori information. By the example of processing the field data of gas-dynamics researches it was shown that the method can improve the accuracy and stability of determining parameters of oil reservoirs, greatly reduce downtime. |
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| ISSN: | 2500-1019 2413-1830 |