The main objects of development of Vostochno-Messoyakhskoye and Tazovskoye fields is the PK1-3 formation, composed of deposits of continental genesis, containing significant reserves of oil and gas. The development of such deposits involves regular use of non-standard technologies and high-tech types of wells completion with continuous improvement of drilling strategy, based on new data on the development object. New data made possible to formulate technological and geological criteria for selecting the most effective type of wellbore for different geological zones of the reservoir. At the moment, about 300 wells of various designs (horizontal wells of various lengths, multilateral wells (2 or more trunks), and wells of Fishbone type have been drilled at Vostochno-Messoyakhskoy field. The increase in the efficiency of wells drilled by fishbone and multilateral wells technologies is 80 and 23% relative to the horizontal wells in similar geological conditions. Therefore, the Tazovskoye field is preparing for full-scale drilling. Taking account of the experience of application of horizontal drilling at oil fringe Vostochno-Messoyakhskoy and other analogous fields was formed by the development based on horizontal wells of extended length. At the present time, the Tazovskoye field has 12 horizontal wells with a length of 2000 m and two well sites with a total sinking of about 4000 m each.
References
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3. Patent no. 2267009 RF, Oil reservoir development method (variants), Inventors: Sugaipov D.A., Mirsaetov O.M., Savel'ev V.A.
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