The paper presents the results of ROI (return on investment) analysis for the development of terrigenous Devonian reservoirs of the Romashkinskoye oil field. Possible ways of payback are discussed involving more efficient operation of wells drilled into Devonian deposits with varying clay content in a terrigenous reservoir. Calculations show that many injection wells consume electricity inefficiently, since the producing well response is not considered when operating the injectors. Calculations show that cost of oil production from the terrigenous Devonian reservoirs of the Romashkinskoye field mostly depends on porosity and permeability properties of these reservoirs. This is due to the fact that "target" wells (clay content > 4%) are less attractive in terms of well interventions than "non-target" wells (clay content < 4%).
semi-variable costs, special-purpose fund, general fund, waterflood types, production cost, porosity and permeability
L.G. Rakhmaev Issledovanie faktorov, vliyayushchih na effektivnost' tekhnologii GRP, primenyaemoj na terrigennyh kollektorah Romashkinskogo mestorozhdeniya, razrabatyvaemyh NGDU «Aznakaevskneft'» [Analysis of factors affecting hydraulic fracturing efficiency in terrigenous reservoirs of Romashkinskoye field developed by NGDU "Aznakaevskneft"]. Electronic source: V.A. Taipova, U.A. Gutorov, L.G. Rakhmaev, Neftyanaya Provinciya, 2019, No.2, pp. 125-137. Available at: (in Russian)
Metodika opredeleniya rentabel'nosti ekspluatacii neftyanyh skvazhin i ob"ektov razrabotki. [Procedure for determination of oil well operation economic viability]. Bugulma, 2016. Available at: (in Russian)
Standart NGDU «Aznakaevskneft'» PAO «Tatneft'» ob ocenke ekonomicheskoj effektivnosti i monitoringe vnutrennih GTM na dobyvayushchem fonde skvazhin» [Regulations on economic efficiency analysis and well interventions monitoring for producing wells, NGDU Aznakaevskneft]. Aznakaevo, 2019. Available at: (in Russian)
V.A. Taipova, PhD, Deputy Director for Research in Reservoir Engineering and IT Development, TatNIPIneft Institute-PJSC TATNEFT
40, M.Djalil st., Bugulma, 423326, Russia Federation
L.G. Rakhmaev, Lead Specialist, Group for Geological Support of Well Construction Operations, Well Intervention Department, Geology and Technology Center NGDU Aznakaevskneft of PJSC TATNEFT