Scientific and technical journal

«Proceedings of Gubkin University»

ISSN 2073-9028

Proceedings of Gubkin University

UDC: 622.276.64
DOI: 10.33285/2073-9028-2020-2(299)-111-119


Silin Mikhail A.1,
Magadova Ljubov' A.1,
Cherygova Maria A.1,
Shidginov Zalim A.1,
Kutusheva Guldar R.1

1 Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation

Keywords: gas well, gas-condensate well, liquid accumulation at the bottomhole, gas well deliquification, surfactant, foamer, foam factor


Many wells cease cost-effective production long before their deposits are depleted. Often this happens due to the accumulation of liquid at the bottomhole of a gas or gas condensate well. The accumulation of liquid occurs when the velocity of the produced gas becomes lower than that necessary to lift the fluid - this velocity is called the critical velocity. The injection of a foaming agent (or foam) to the bottomhole of a gas or gas condensate well is one of the promising methods of influencing a flooded gas or gas condensate well to control the amount of excess fluid in the bottom of a well. This method is not applicable in all cases: for example, the foam collapses in contact with condensate or simply does not form, and at high temperatures the formation of foam occurs less intensively. Gas well deliquification with foamers is a preventive method that allows for some time to reduce the amount of liquid in the borehole, correspondingly increasing the production of gas and gas condensate. In this work, we analyze the existing surfactants that are different in nature and type and present a new patented foaming agent that solves a number of problems: the presence of gas condensate in the well, high temperatures at the bottomhole, and high salinity of formation waters. Various laboratory tests of this foaming agent have been carried out, as a result of which the optimal concentration of the foaming agent and the possible limits of use in gas and gas condensate wells have been determined. For fields in difficult climatic conditions, a solid foaming agent has been developed and patented, which has similar properties to a liquid foaming agent.


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