Capillary Suction Time

C&A offers Capillary Suction Testing (CST) which utilizes off-the-shelf equipment to give rapid determination of fluid and shale interactions. CST testing is used to determine impact on shale swelling. Results are reported normalized to a “blank” test with no shale. Slower CST times (larger normalized values) indicate reaction of the test fluid with the shale. Lower CST times show less interaction with the shale.