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Magomed Sh. Mintzaev
Magomed Sh. Mintzaev
Rector, Dr.Habil.
Grozny State Oil Technical University named after academician M.D. Millionshchikov
Russia
Rector, Dr.Habil.
Grozny State Oil Technical University named after academician M.D. Millionshchikov
Russia
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Articles

  • Date submitted
    2020-07-02
  • Date accepted
    2021-02-16
  • Date published
    2021-05-21

Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Article provides a brief overview of the complications arising during the construction of oil and gas wells in conditions of abnormally high and abnormally low formation pressures. Technological properties of the solutions used to eliminate emergency situations when drilling wells in the intervals of catastrophic absorption and influx of formation fluid have been investigated. A technology for isolating water influx in intervals of excess formation pressure has been developed. The technology is based on the use of a special device that provides control of the hydrodynamic pressure in the annular space of the well. An experiment was carried out to determine the injection time of a viscoelastic system depending on its rheology, rock properties and technological parameters of the isolation process. A mathematical model based on the use of a special device is presented. The model allows determining the penetration depth of a viscoelastic system to block water-bearing horizons to prevent interformation crossflows and water breakthrough into production wells.

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Mikhail V. Dvoynikov, Vyacheslav N. Kuchin, Magomed Sh. Mintzaev (2021) Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling. Journal of Mining Institute. Vol 247. p. 1-9. DOI: 10.31897/PMI.2021.1.7