LIMESTONE POWDER

LIMESTONE POWDER

Limestone powder is the finely-dispersed product obtained by mechanical calcareous ore degradation. Powder appearance: stone.

Proposed new and conventional limestone weighting agent consists of carbonate rocks and has the following chemical formula SASO3.

Limestone powder density is equal to 2700 kg/m3 and has property to be dissolved completely in hydrochloric acid. Such advantage of limestone powder provides retention of natural reservoir characteristics of productive formation. As a result of this, oil and gas well productive capacity increases. Weighted drilling muds with a density of 1500-1600 kg/m3 can be prepared by means of limestone powder.

Limestone powder, due to the physiochemical parameters and structural features, has a number of the following qualities which distinguish it from chalk and other varieties of calcium carbonate:

- high calcium carbonate concentration (more than of 98.0-99.0%);     

- high grain strength;

- low porosity and water absorption;

- high refractivity;

- low content of coloring iron, manganese, titanium and cobalt oxides, and, consequently, high whiteness index;

- low content of water-soluble salts;

- high inorganic acid solubility;

- low resistance to UV radiation.

Limestone Powder Weight Ability Assessment Laboratory Findings:

As completed laboratory testing table data show, fresh and salt drilling muds with a density of 1500-1600 kg/m3 can be prepared by means of carbonaceous weighting agent – limestone powder.