Application of inflow control devices in horizontal sidetrack wells in formation AB4-5 of the Samotlorskoye field

UDK: 622.276:
DOI: 10.24887/0028-2448-2018-4-84-88
Key words: inflow control device, horizontal sidetrack well, water cut, residual oil reserves, simulation model
Authors: V.V. Vasiliev (TNNC LLC, RF, Tyumen), V.N.Vasiliev (TNNC LLC, RF, Tyumen), P.V. Elsov (TNNC LLC, RF, Tyumen), K.G. Lapin (TNNC LLC, RF, Tyumen), D.P. Patrakov (TNNC LLC, RF, Tyumen), R.F. Saitov (Samotlorneftegas JSC, RF, Nizhnevartovsk)

The primary method for extraction of the residual oil of the AB4-5 formation in the Samotlorskoye field has been drilling of horizontal sidetrack wells. In this article, the possibility of using inflow control devices (ICDs) in such wells is considered. This technology is aimed at prevention of premature shut-in of wells due to high water-cut, as well as at increase of cumulative oil production due to extraction of reserves that otherwise cannot be extracted with traditional completion methods. Based on ICDs’ design features, ICDs of a passive type are considered for the geological conditions of the formation. Evaluation of the effectiveness of their application was carried out on the basis of a sector simulation model. A detailed model of the area of interest allowed incorporating thin shale baffles affecting the flow of water fr om injection wells to production wells and thus influencing the distribution of residual oil reserves in the formation. A feasibility study showed a potential efficiency of the ICD installation in a number of wells. Using the example of the Samotlorskoye field wells, it is shown that successful application of ICDs requires an individual approach to the selection of a formation section where wells with ICDs will be drilled, and to the trajectory tracking of such wells. Application of ICDs involves high capital expenditures, thus it must be justified by a sufficient number of various simulation cases on a sector simulation model. The article presents the main aspects of a successful application of ICDs at the Samotlorskoye field wh ere specific features of the AB4-5 formation are taken into account, and a sequence of steps for justifying the feasibility of applying the technology.


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