Engineering and Technological Approaches to Well Killing in Hydrophilic Formations with Simultaneous Oil Production Enhancement and Water Shutoff Using Selective Polymer-Inorganic Composites

Valery Meshalkin (), Rustem Asadullin, Sergey Vezhnin, Alexander Voloshin, Rida Gallyamova, Annaguly Deryaev, Vladimir Dokichev, Anvar Eshmuratov, Lyubov Lenchenkova (), Artem Pavlik, Anatoly Politov, Victor Ragulin, Danabek Saduakassov, Farit Safarov, Maksat Tabylganov, Aleksey Telin and Ravil Yakubov
Additional contact information
Valery Meshalkin: Department of Logistics and Economic Informatics, International Institute of Resource Saving Logistics and Technological Innovation, Dmitry Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Square, 125047 Moscow, Russia
Rustem Asadullin: Faculty of Mining and Petroleum, Ufa State Petroleum Technological University, 1 Kosmonavtov Street, 450064 Ufa, Russia
Sergey Vezhnin: Ufa Scientific and Technical Center, LLC, 99/3 Kirova Street, 450078 Ufa, Russia
Alexander Voloshin: Ufa Institute of Chemistry, Ufa Federal Research Center, Russian Academy of Sciences, 71 Oktyabrya Avenue, 450054 Ufa, Russia
Rida Gallyamova: Ufa Institute of Chemistry, Ufa Federal Research Center, Russian Academy of Sciences, 71 Oktyabrya Avenue, 450054 Ufa, Russia
Annaguly Deryaev: Department of Well Drilling, Scientific Research Institute of Natural Gas of the State Concern “Turkmengas”, Ashgabat 744000, Turkmenistan
Vladimir Dokichev: Ufa Institute of Chemistry, Ufa Federal Research Center, Russian Academy of Sciences, 71 Oktyabrya Avenue, 450054 Ufa, Russia
Anvar Eshmuratov: Department of Geodesy, Cartography and Natural Resources, Karakalpak State University, Nukus 230100, Uzbekistan
Lyubov Lenchenkova: Faculty of Mining and Petroleum, Ufa State Petroleum Technological University, 1 Kosmonavtov Street, 450064 Ufa, Russia
Artem Pavlik: Faculty of Mining and Petroleum, Ufa State Petroleum Technological University, 1 Kosmonavtov Street, 450064 Ufa, Russia
Anatoly Politov: Institute of Solid State Chemistry and Mechanochemistry of Siberian Branch RAS, 18 Kutateladze Street, 630128 Novosibirsk, Russia
Victor Ragulin: Ufa Scientific and Technical Center, LLC, 99/3 Kirova Street, 450078 Ufa, Russia
Danabek Saduakassov: Department of Petrochemical Engineering, S. Yessenov Caspian University of Technologies and Engineering, 1 Microdistrict 32, Aktau 130000, Kazakhstan
Farit Safarov: Ufa Scientific and Technical Center, LLC, 99/3 Kirova Street, 450078 Ufa, Russia
Maksat Tabylganov: Department of Petrochemical Engineering, S. Yessenov Caspian University of Technologies and Engineering, 1 Microdistrict 32, Aktau 130000, Kazakhstan
Aleksey Telin: Ufa Scientific and Technical Center, LLC, 99/3 Kirova Street, 450078 Ufa, Russia
Ravil Yakubov: Faculty of Mining and Petroleum, Ufa State Petroleum Technological University, 1 Kosmonavtov Street, 450064 Ufa, Russia

Energies, 2025, vol. 18, issue 17, 1-27

Abstract: Well-killing operations in water-sensitive hydrophilic formations are often complicated by extended well clean-up periods and, in some cases, failure to restore the well’s production potential post-kill. Typical development targets exhibiting these properties include the Neocomian and Jurassic deposits of fields in Western Siberia and Western Kazakhstan. This paper proposes a well-killing method incorporating simultaneous near-wellbore treatment. In cases where heavy oil components (asphaltenes, resins, or paraffins) are deposited in the near-wellbore zone, their removal with a solvent results in post-operation flow rates that exceed pre-restoration levels. For wells not affected by asphaltene, resin, and paraffin deposits, killing is performed using a blocking pill of invert emulsion stabilized with an emulsifier and hydrophobic nanosilica. During filtration into the formation, this emulsion does not break but rather reforms according to the pore throat sizes. Flow rates in such wells typically match pre-restoration levels. The described engineering solution proves less effective when the well fluid water cut exceeds 60%. For wells exhibiting premature water breakthrough that have not yet produced their estimated oil volume, the water source is identified, and water shutoff operations are conducted. This involves polymer-gel systems crosslinked with resorcinol and paraform, reinforced with inorganic components such as chrysotile microdispersions, micro- and nanodispersions of shungite mineral, and gas black. Oscillation testing identified the optimal additive concentration range of 0.6–0.7 wt%, resulting in a complex modulus increase of up to 25.7%. The most effective polymer-inorganic composite developed by us, incorporating gas black, demonstrates high water shutoff capability (residual resistance factor ranges from 12.5 to 65.0 units within the permeability interval of 151.7 to 10.5 mD). Furthermore, the developed composites exhibit the ability to selectively reduce water permeability disproportionately more than oil permeability. Filtration tests confirmed that the residual permeability to oil after placing the blocking composition with graphene is 6.75 times higher than that to water. Consequently, such treatments reduce the well water cut. Field trials confirmed the effectiveness of the developed polymer-inorganic composite systems.

Keywords: hydrophilic low-permeability reservoirs; well killing with simultaneous stimulation and water shutoff; organic solvents; water shutoff using polymer-gel composites reinforced with micro/nano-sized natural inorganic materials; laboratory studies; field trials (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/17/4721/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/17/4721/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:17:p:4721-:d:1742593

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().