Vol. 337 No. 5 (2026)
DOI https://doi.org/10.18799/24131830/2026/5/5004
Substantiation of rational well placement systems for differential oil viscosities based on hydrodynamics 3D modeling
Relevance. Depending on the geological and technological conditions of an oil field, the task of maximising the production of oil reserves and economic indicators can be solved using development systems characterised by different density and well placement systems. To solve this problem, the most reliable method is considered to be 3D-modelling, which allows taking into account in detail the geometry of productive formations, their discontinuity and change of filtration-capacitance properties in the volume of an oil deposit. 3D modelling is one of the most time-consuming design stages, which implies consideration of a limited number of development options on 3D models. Object. Visei reservoirs with reserves up to 1 million tonnes, developed with waterflooding of reservoirs by conditionally vertical wells. Aim. Justification of the efficiency of various development systems with reservoir pressure maintenance at different ranges of oil viscosity. The obtained conclusions will make it possible to limit the number of design variants differing in well density and location, thereby significantly reducing labour costs and time for 3D modelling. Methods. As a result of statistical analysis, an analogue object with typical geological conditions of reservoir distribution in the study area was selected. A 3D hydrodynamic model with an average permeability of 0.375 μm2 was used. Calculations of development options for seven-point, selective, single-row and three-row systems with a well grid of 400×400 and 450×450 m were performed sequentially for this model. The calculations were performed at different ranges of oil viscosity from 1 to 100 mPa∙s. Technical and economic indicators of development efficiency were estimated for all considered variants. Results and conclusions. The analysis of technological and economic efficiency of the calculated variants of 3D modelling allowed for different ranges of reservoir oil viscosity to identify development systems promising for specific geological conditions. The proposed systematisation of development options and general conclusions can be used in development design, increasing the efficiency of decisions regarding the choice of options in hydrodynamic modelling.
For citation: Losev G.E., Wang L., Galkin S.V. Substantiation of rational well placement systems for differential oil viscosities based on hydrodynamics 3D modeling. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 5, pp. 130-143. https://doi.org/10.18799/24131830/2026/5/5004
Keywords:
development system, hydrodynamic model, viscosity, permeability, oil recovery factor, economic efficiency
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