The majority of fields in Russian Federation contain multiple stratified oil reservoirs. In many cases the fluid properties, geological parameters and reservoir pressure conditions are such that each reservoir has to be developed separately, as dictated by legislation. This means additional drilling grids or producing zones consecutively over time using the same wellbore.
The first option implies heavy CAPEX commitments, while the other means significant production delay with a drastic negative impact on NPV. The alternative is dual completion technology. Its advantages include drilling cost reduction, production acceleration, independent control and optimal drawdown on each layer, elimination of undesirable fluids’ mixing, ability to continue production if one of the pumps fails, elimination of well shutdown to test separate zones, reduced environmental footprint and full compliance with legal requirements. There is a range of dual completion and dual monitoring technologies which can be applied to meet the legal requirement with a certain degree of accuracy. Selection of the right technology is critical to obtain the optimal value from the investments. The presentation discusses the challenges in the domain of completion and production technology for multilayered reservoirs in TNK-BP; covers main objectives of dual completions /dual monitoring and key functional requirements; highlights the classification of dual completion types (covering single lift and dual lift categories and subgroups) including high level overview of specific technologies available on the market. The current situation with multilayered reservoirs in TNK-BP regions will be presented with highlights on the results of the performed dual completion pilots as well as outlook on future activities.
Eduard Muslimov is а Director on Production technologies & completions, within Wellworks Department of «TNK-BP Management», Moscow. He started with TNK-BP in 2008 and deals with new technologies in production and completion domains for TNK-BP assets. Prior to TNK-BP he was a Production Project Manager with Schlumberger IPM and was working on several field management and production projects with various clients in Russia, USA, South Africa and Romania. From 1999 he holds a Petroleum Engineering and Industrial Management Degree from Tomsk Polytechnic University. SPE member since 2001.