«Onshore and offshore oil and gas well construction»

Analysis of the methods applied to combat wells self-killing at the Yamburg oil and gas condensate field and substantiation of the technology selection

UDC: 622.279.51
DOI: -

Authors:

¹ Gazprom Dobycha Krasnodar, Krasnodar, Russia
² RANS, Moscow, Russia
³ North Caucasus Federal University, Stavropol, Russia

Keywords: methods of combating wells self-killing, periodic wells blowing out, replacement of tubing by pipes of smaller diameter, surfactant treatment, injection of dry gas into the annulus, operation of wells using concentric lift strings, calculation of tubing replacement by smaller diameter pipes

Annotation:

The Yamburg oil and gas condensate field, discovered in 1969, is unique – more than 5 trillion cubic meters of gas have been produced since the beginning of its operation. Now it is entering the final stage of development; as reservoir pressure drops, the average productivity of wells and their flow rates also decrease, and the water cut of the produced products increases. Therefore, the problem of wells self-killing at the Yamburg oil and gas condensate field is becoming more and more urgent. The accumulation of fluid at the bottom reduces the well's flow rate, which, in turn, leads to even greater fluid accumulation. If this process is not monitored and controlled, it will ultimately lead to self-killing of the well – a phenomenon when a potentially productive gas well stops blowing out. In practice, this problem is solved by several different methods discussed in the article.

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