Аннотация:We consider the filtration of raw water in a formation surrounding injection wells in
oilfields of Western Siberia. The mathematical model for suspension filtration developed
earlier on the basis of tree-continua approach allows to describe the permeability damage and
recovery due to trapping and mobilization of externally-introduced fines. As compared to
classical deep-bed filtration models, the proposed model takes into account the filtration of the
carrier fluid through the pack of trapped fines and uses only two free parameters to describe the
particle trapping and mobilization rates. It has gone through a thorough validation campaign
against experimental data with contamination of porous samples by external fines and
mobilization of pre-seeded particles in sand packs. Simulations of permeability dynamics in the
zone surrounding injection wells are carried out using the values of free parameters obtained
by tuning the model against available lab experiments. Both continuous and periodic water
flooding/cleanup is modelled. It is found that there are periodic regimes of water injection, in
which the permeability of the rock is not damaged. The study will be continued after the
calibration of the model against thorough laboratory tests with natural cores and field tests of
injection rate dynamics in flooding wells.