Hydrogeochemical studies as an additional tool for the analysis of oil field development

Lyalin A.A. aalyalin2@tnnc.rosneft.ru “Tyumen petroleum research center” LLC Tyumen
Vasiliev V.V.
Merkulov A.V.
DOI: 10.24412/2076-6785-2023-2-19-22

To analyze the development of an oil field, many different tools are used, such as field-geophysical studies, hydrodynamic studies, permanent geological and technological models, etc. At the same time, the information obtained from the results of hydrogeochemical analysis, which carries valuable data on the ongoing processes in the reservoir, including in individual wells, is often not fully used. The authors of the article propose a mathematical tool for analyzing hydrogeochemical data, which allows analyzing the processes of reservoir flooding, including existing problems. The essence of the method is to identify deviations of the component composition when mixing reservoir and injected water. This analysis makes it possible to identify a discrepancy between the percentage of components and the volume percentage of injected and reservoir water, which gives additional information about the flooding process, as well as possible problems in the wells. This method does not require any additional costs for special studies and uses standard hydrogeochemical information obtained in the field. The proposed approach can serve as an additional tool for analyzing the development of oil fields.

Materials and methods
The analysis of hydrogeochemical data is carried out using the mathematical tool proposed by the authors. Possible deviations (behind-the-casing flows, water interactions with the rock and with each other, etc.) occurring in wells during flooding have been identified.

hydrogeochemical methods; analysis of reservoir engineering; maintenance of reservoir pressure; injected water; reservoir water; associated water; physical properties; chemical composition; percentage; mathematical tool
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