Justification of Condensate Recovery during Development of Productive Layers in Termokarstovoye Field

Abstract

The tendency of the growth of the share of natural gas in the structure of the fuel and energy balance in Russia has led to active involvement in the industrial development of gas and gas condensate fields located in extreme natural and climatic conditions. Development of Yamalo-Nenets Autonomous Okrug fields, in which more than 65% of the explored reserves of Russia are concentrated, is a fundamentally new stage in the theory and practice of design, construction, and operation of such fields. Justification of condensate recovery during the development of U1 and U2 formations is relevant because the structure of the Termokarstovoye field contains deposits of both massive and reservoir types. It is advisable to develop massive type gas condensate formations simultaneously either with vertical wells or double-barreled wells with horizontal ending. Development of productive layers U1 and U2 are being depleted by wells with horizontal opening of the formation. Moreover, three wells with two horizontal boreholes exploit the U1 formation and two vertical wells are located in the dome zone of the object I. The placement of double-barreled well number 111 is quite justified, since it is located at the edge of the structure of the U1 formation, close to the internal gas-bearing contour. The conducted studies significantly allow increasing condensate recovery and the productivity of gas condensate wells, due to the creation of favorable conditions for the removal of condensate to the surface.