Origin and Emulsifying Behavior of Acid Sludge from Chengdao Crude Oil

There was once an accident in Chengdao oil field where the backflowing spent acid entered into the gathering system and caused disorder in crude oil demulsification and oil and water purification. In this work the origin of and the emulsification by acid sludge were investigated. The n-heptane resin was isolated from Chengdao crude oil of resin content 24% taken at Hai-4 gathering plant and was treated with 15% hydrochloric acid containing 1%...