Investigation of the impact of weighting particles on drilling mud rheology and damage to reservoir formation

Abstract

The effect of calcium carbonate on drilling fluid densities after damage to the reservoir during the liquid flow was considered in the present paper. To test the initial / final permeability and fluid flow rate as well as the damage ratio, the damage tests have been completed and several Binghamian drilling formulation that were carefully prepared in the laboratory are used. Based on the obtained results, there is a minimal quantity of surfactant and the DR significantly changes beyond this limit. The drilling fluids containing 3 % of calcium carbonate and 2-3 % of the emulsifiers and wetting agent show a high flow pressure and display an immense damage ratio of about 43 %. It is also that these drilling fluids containing calcium carbonates provide the rheological properties close to those used in the field level. Such drilling fluids are stable over time, giving the yield stress between 5-10 Pa to allow the fluid flow.