Tracer research

DESCRIPTION OF THE TECHNOLOGY

Among the various types of field surveys there is the tracer method for studying oil reservoirs which is one of the most informative ways from the point of view of controlling the flooding process. The method is based on the addition of labeled substances to the liquid injected into the formation and on monitoring the time and place of output of the labeled substance along with the extracted products. In the course of the works, real filtration flows are identified, due to both the features of the geological structure of the reservoir and the regime of field development.

"Mirrico" Group performs a full cycle of tracer research of reservoirs - determination of the number and type of tracers necessary for specific reservoir conditions, estimation of the observations period and frequency, injection of tracer solutions into the reservoir and sampling of extracted products, laboratory evaluation of the quantitative content of tracers in selected samples, interpretation of the results obtained.

Produced water samples analysis for the content of tracers in it is carried out on the basis of proprietary chemical and analytical laboratory located in Samara. Mathematical and graphical processing of the laboratory analysis results is carried out on the basis of proprietary software, which is based on the modeling of straining action of tracing fluid in the investigated formation.

As a result of such researches, the customer receives a graphical and digital image describing the distribution of the filtration flows into the reservoir and all the necessary recommendations for optimization the existing flooding system.

CATALOGUE OF REAGENTS

• Water soluble tracers – DCT-WS series, 15 subjects
• Oil-soluble tracers – DCT-OS series, 11 subjects.
• Gas tracers – DCT-FG series, 4 subjects.

SCOPE OF APPLICATION

The tracer method determines:

• Hydrodynamic connection between the deep disposal and exploitation wells;
• Hydrodynamic connection between the formations, blocks and horizons under development;
• Features of the geological structure of the reservoir;
• The true through-slot velocity over the formation;
• Quantitative distribution of filtration flows in the investigated reserve;
• Insight of the areas covered by drainage;
• Productivity of the identified permeable system;
• The rock volume through which the labeled liquid is filtered;
• The degree of the injected water impact at the well;
• The efficiency of different methods of enhancing oil recovery factor by conducting researches before and after application.