«Oilfield engineering»

Well integrity assessment of a steam injection well based on the data of short-term dynamic temperature studies

UDC: 550.8.052
DOI: -

Authors:

¹ Ufa University of Science and Technology, Ufa, Russia
² LUKOIL-PERM, Perm, Russia
³ Inno Technology, Perm, Russia
⁴ Perm State National Research University

Keywords: Distributed Temperature Sensors (DTS), enhanced oil recovery, thermal-steam formation treatment, heat losses, injection well, well integrity assessment, numerical modeling of heating processes

Annotation:

The authors of the article discusses the results of researches and processing of fiber optic measurement data, which were carried out by Inno Technology LLC in LUKOIL-Usinskneftegaz TPC of LUKOIL-Komi LLC using the SALAMANDRA well logging tool in accordance with the unique technology of short-term dynamic temperature studies (CDTI) using high-temperature fiber optic logging cable in steam injection wells of the Usinskoye field. One of the objectives of the short-term dynamic temperature studies was to assess the well integrity by analyzing the dynamics of the temperature field deformation along the wellbore after stopping the injection of superheated steam.

Studies of steam injection wells to assess the technical state of the column are required when injecting coolant into the formation when developing hard-to-recover reserves. It is caused by the fact that the state of the production string determines the amount of thermal energy delivered to the bottom hole, the physical state of the coolant and its thermo-physical parameters at the depth of the formation. The object of the study is steam injection wells in which fiber-optic measurements of the temperature distribution in depth over time are carried out during steam injection and after it is stopped in order to assess the technical state of the production casing string according to CDTI data along the wellbore during steam injection based on mathematical modeling of thermal processes.

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