Study on Damage Characteristics and Formation Protective Drilling Fluids in Dongying Formation Low Permeability Reservoir of Chengbei Oilfield

摘要

On account of the poor protection of the Dongying formation low permeability reservoir of Chengbei oilfield, this paper researched the damage characteristics of Dongying formation low permeability reservoir, by reservoir sensitivity test, water locking damage test, TC model clogging test, and so on. Studies showed that the factors causing damage included water block, water sensitivity, and solid particles invasion. A kind of high quality pollution-free sea-drilling fluid was developed to deal with the potential damage, which had a better performance and protected the reservoir well.