Results of core filtration tests to assess the reduction in permeability due to colloid migration

Results of filtration tests of three core samples, filtered liquid - deionized water and kerosene. Filtration installation - AFS-300. Filtering conditions inside files. Core samples are registered in IGSN, the numbers and type of fluid are indicated in the file name. Prior to filtration, the samples are saturated under vacuum for 24 hours. Before filtration, the samples were kept in an AFS-300 core holder at confining and pore pressure for 24 hours.