Anna Kottsova

Young specialist in Petroleum Engineering with profound knowledge of physical-chemical processes in the reservoirs. Have diverse skills due to wide educational background and variety of internships. Keen learner and aspiring scientist.

  • MSc Petroleum Engineering at Skolkovo Institute of Science and Technology
    (Sep 2018 – June 2020)
  • BSc Chemical Engineering at Gubkin Russian State University of Oil and Gas
    (Sep2014 – June 2018)

Project Title: Hydrogeochemical processes affecting efficiency during operation
Host Institutions: TU Delft, ETH Zürich, Hydreco Geomec
Supervisory Team: Maren Brehme, Martin Saar, Barbara Cox
Start date: 1.5.2021

ESR01 Objectives:

Geohydrochemical processes are often responsible for decreasing production or injection rates. Clogging processes can be divided into (1)physical, (2) chemical, and (3) biological processes and be studied by analysing fluid and solid samples as well as operational data. Earlier results show that the spatially correlating nature of permeable structures is responsible for exponentially decreasing injectivity because few highly permeable zones clog rapidly by intruded particles.

In this project, hydrogeochemical processes and their interaction will be monitored and investigated in real time in the DAPwell. Monitoring will take place during production and cold injection in the reservoir as well as in the surface infrastructure. Concepts will be developed to avoid hydrogeochemical processes negatively affecting efficient long-term operation.

Eventually, data from the DAPwell will be compared to different geothermal reservoirs in the Netherlands in cooperation with the industry partner Hydreco Geomec, who has access to several sites.

Research Update

During the first 6 months of the PhD project extensive literature analysis was performed. As a result of this analysis, a matrix of different parameters which influence clogging processes in geothermal reservoirs was built. This matrix now allows to identify knowledge gaps and narrow down the main research questions. In parallel with literature review, discussions with industry experts in the field are held to identify applicability of the research. Also, in collaboration with Wen Luo (ESR #2) a review paper on reinjection in geothermal operations is in progress.

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