Preventing paraffination of pumping equipment of oil wells
- DOI
- 10.2991/aime-17.2017.60How to use a DOI?
- Keywords
- asphalt-resin-paraffin depositions, ARPD, paraffination of well equipment, depositions control, electrolysis
- Abstract
In the overall balance of oil reserves of Russia, high-paraffin oils (HWO) make up, by different estimations, from 55 to 75%. Asphalt-resinous and paraffin depositions (ARPD) are contained in the composition of oils in almost all oil-producing regions of the Russian Federation (RF). High content of paraffin (more than 6%) is one of the indicators, by which oil is related to the hard-to-recover type. The chemical composition of ARPD depends on the properties of extracted oil, thermo- and hydrodynamic conditions of productive strata, geological and physical peculiarities, the method of development and exploitation of deposits. ARPD accumulation in the air-gas channel of oil-field equipment and on the internal side of pipes leads to the reduction of the system performance, a decrease of the overhaul period and effectiveness of the operation of pump assemblies, an increase of the wear of equipment, electric energy consumption and pressure in the flowlines. In extreme cases, it can result in the well shut-down due to complete overlap of cross-section of tubing string or presence of ARPD in the well pumps. The ARPD is controlled in two directions: prevention or the slowing down of formation of sediments and removal of already formed ARPD. To prevent paraffination of the pump assembly, chemical and physical methods are used, and to remove deposited paraffin - mechanical, thermal, and chemical methods. None of the enumerated methods is free from disadvantages. To prevent depositions, it is expedient to use physical impacts, reducing coalescence of separate particles of hydrocarbonaceous associates. It is proposed using electrolysis of mineralized stratum water and creating electrostatic field with polarity, similar to ARPD particles, as such impacts. Technical realisation of these effects is possible by creation of the electrochemical chain, similar to the one used during cathode protection. Using the method provides unhindered flotation of paraffin crystals to the wellhead without their deposition on the well equipment
- Copyright
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Andrei Nikolaevich Krasnov AU - Elena Aleksandrovna Khoroshavina AU - Marina Yurevna Prakhova PY - 2017/07 DA - 2017/07 TI - Preventing paraffination of pumping equipment of oil wells BT - Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017) PB - Atlantis Press SP - 370 EP - 375 SN - 2352-5401 UR - https://doi.org/10.2991/aime-17.2017.60 DO - 10.2991/aime-17.2017.60 ID - Krasnov2017/07 ER -