The Application of A New Polymer Mud to Horizontal Drilling in the Dagang Oilfield

Abstract

Abstract A new kind of polymer muds, which is generally referred to as the amphionic polymer mud, has been applied to the two horizontal well drilling for the first time in the Dagang Oilfield, located in east China. In this mud system, two amphionic polymers are usually used as the main additives, the one with high molecular weight is an inhibitive encapsuler and filtration control agent, and the other one with low molecular weight is a deflocculant. The amphionic polymer,…