Reservoir protection drilling fluid system

During the drilling process of oil and gas wells, drilling into the oil and gas layer means the beginning of contamination of the oil layer. The solid and liquid phases in the drilling fluid enter the oil and gas reservoir, causing a decrease in the permeability of the production layer and partial blockage of the pore channels. The solution is to use a reservoir protection drilling fluid system that is good for protecting the formation to reduce the damage of the drilling fluid to the reservoir. The core products are the drilling fluid modified starch filtrate reducer CS-EZFLO, CS-EZFLO HT, and the drilling fluid loss control agent CS-VIS.