Detailed values of Potassium formate Sodium formate in drilling completion fluid weighting agent

In the drilling industry, it is necessary to prevent well collapse leakage, to protect oil gas reservoirs in order to meet the protection of the modern environment. For formations with well-developed bedding fractures, in order to prevent well collapse leakage, reduce damage to oil gas reservoirs, drilling fluid is required to have strong sealing properties, effectively seal formation bedding fractures, prevent drilling fluid its filtrate entering the formation, achieve the goal of improving formation pressure bearing capacity, stabilizing wellbore, preventing well leakage, protecting oil gas reservoirs. Let's talk about the detailed values of Potassium formate Sodium formate in drilling completion fluid weighting agent. Drilling mud additives

solubility

The solubility of formate in water is very high, the solubility depends on the Atomic mass of alkali metal. The saturation concentration of cesium formate can reach 83%, the saturation concentration of Potassium formate can reach 76%, the saturation concentration of Sodium formate can reach 45% (all above are weight percentages), the dissolution is rapid.

Density

Drilling mud additives

Formate solution can be prepared with different densities of formate clean brine according to needs. The density of cesium formate solution can reach 2.32g/cm3, the density of Potassium formate solution can reach 1.58g/cm3, the density of Sodium formate solution can reach 1.33g/cm3

Viscosity of formic acid saline solution

Formic acid saline solution can maintain a low viscosity even at high densities, without causing an increase in drilling fluid viscosity. The viscosity of saturated solution of cesium formate is only 2.8 cp, that of saturated solution of Potassium formate is 10.9 cp, that of saturated solution of Sodium formate is 7.1 cp

PH of formic acid saline solution

Formate belongs to the category of strong alkali weak acid salts, the aqueous solution shows weak alkalinity. As the concentration of formate increases, the alkalinity increases; The saturated solution pH of cesium formate is 9.0, the saturated solution pH of Potassium formate is 10.6, the saturated solution pH of Sodium formate is 9.4.

Activity of formic acid saline solution

Formate can achieve low activity of aqueous solution. In the presence of Semipermeable membrane, the activity of drilling completion fluid is an important factor to maintain formation stability. Saline solution of different concentrations