Norwegian Journal of development of the International Science
Published August 26, 2022 | Version v1
Journal article Open

APPLICATION FEATURES OF SINGLE-LIFT UNITS FOR DUAL COMPLETION OF FACILITIES OF MIDDLE AND LOWER CARBONIC STRATA

Authors/Creators

  • 1. Deputy Head of Geological and Hydrodynamic Modeling and Development Department No. 4 PJSC TATNEFT, Almetyevsk, Russia
  • 2. PJSC TATNEFT, Almetyevsk, Russia
  • 3. Doctor of Technical Sciences, Associate Professor, Professor of Department of Exploration and Development of Oil and Gas Fields Ufa State Petroleum Technical University (Oktyabrsky Branch), Oktyabrsky, Russia Head of the department for organization of enhanced oil recovery operations PJSC TATNEFT, Almetyevsk, Russia

Description

Abstract

More efficient technologies should be introduced when developing mature fields to maintain the profitability of oil production. This article considers a unit for dual completion of several facilities, which makes it possible to develop strata, the individual exploitation of which is unprofitable. The considered unit also makes it possible to develop multilayer facilities in a single grid. Today there are many different types of dual completion units, the application of which depends on geological and physical characteristics of the facility and technical characteristics of the well. By design, dual completion units can be divided to single-lift and dual-lift units. The advantage of the dual-lift scheme is the ability to obtain direct information on the flow rate, water cut of the strata being developed and the bottom hole pressure of the upper stratum. During the application of the single-lift scheme, there is no possibility to directly determine the performance of each facility. The need to use single-lift schemes for dual completion is determined by the fact that small-diameter well technologies are actively used today. In a number of cases, when connecting the productive stratum with the implementation of single-lift dual completion, it was not possible to achieve an increase in the flow rate. The performed studies showed that the predicted oil flow rate was not achieved due to the decrease in productivity of the upper horizon and lack of bottom hole pressure control in the lower facility, as well as a requirement for the presence of differential pressure between the facilities for the correct work of equipment. One of the solutions to this problem is the introduction of more advanced units for dual completion.

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