| abstract |
The invention provides a fluid loss reducer for water-based drilling fluid and a preparation method thereof, belonging to the technical field of drilling fluid. The fluid loss reducer is in the form of a water-in-oil emulsion, has good dispersibility, and is convenient to use on site. The fluid loss reducing agent can balance the contradiction between fluid loss reducing performance and rheology, not only has good fluid loss reducing ability, but also can assist in adjusting the rheology of drilling fluid. The fluid loss control agent includes the following components: acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacryloylpropyltrimethylammonium chloride, sodium formate, sodium hydroxide, ammonium persulfate , Span 80, Span 20, water, white oil. The fluid loss reducer is added to the water-based drilling fluid in the drilling process to control the fluid loss. |