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Фундаментальной проблемой, на решение которой направлен предлагаемый Проект, является установление однозначного соответствия между лабораторными экспериментами на образцах керна и моделированием в масштабе пор для решения задач точного определения фильтрационных характеристик пород-коллекторов и их апскейлинга
Core laboratory tests are de facto the standard method for assessing porous media flow and transport properties. However, a number of key problems of laboratory measurements, such as the mismatch of the boundary conditions (pressure and conditions on the sides parallel to applied pressure gradient) with real ones, the inability to accurately verify the measured values (repeatability of measurements is not proof of the accuracy of the measurements), the use of empirical models to introduce corrections (for example, the Klinkenberg correction for measuring gas permeability), do not allow us to assert that the data obtained have the necessary accuracy. Pore-scale modeling methods, which have been actively developed as a replacement or assistant for laboratory methods in the last decade, also have a number of disadvantages: the accuracy of the simulations depends on the accuracy of the input data (resolution of X-ray computed tomography is limited – only pores of a limited size range can be assessed with a single scan), the difficulty of wettability parameterization (for example, significant variability of contact angles during multiphase flow and the impossibility of their accurate description only through the mineral composition of the pore walls). Due to the complex structure of real samples of reservoir rocks - a wide range of pore sizes, mineral composition, inhomogeneities of the pore space, etc., it is not possible to isolate and separately study the influence of one of the factors on the results of measurements or modeling. Currently the correspondence between measurement and modeling is simply poor. The project aims to solve the fundamental problem of the lack of correspondence between the experimental and model approaches, which we propose to eliminate by simplifying the structure of the porous medium based on the creation of artificial samples with known properties using 3D printing. The solution to this key problem will make it possible to significantly advance in our understanding of flow processes in porous media and to solve one of the main applied problems - to increase hydrocarbon production by reducing their trapping during two-phase flow. The innovativeness of the multidisciplinary studies in the field of oil and gas proposed in the Project is due to the unique combination of relevant scientific disciplines: from statistical physics (design of the structure of porous material with desired properties based on stochastic reconstructions, upscaling to the full tensor of physical properties), computational physics in the pore scale (flow simulations in the Stokes, Knudsen and transition regimes by numerical methods and based on pore-network models, percolation theory and theory of effective media) to petrochemistry (change and control of wettability) and high-precision laboratory measurements (measurements on artificial core samples). The quality of research and obtaining world-class results is ensured by the joint work of Russian and Iranian teams - experts in the field of modeling and laboratory research, respectively.
грант РФФИ |
# | Сроки | Название |
1 | 10 февраля 2021 г.-10 февраля 2024 г. | Анализ защемления фазы углеводородов при двухфазной фильтрации, а том числе в газоконденсатных резервуарах |
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