MULTI-MODAL PARTICLE SIZE DISTRIBUTION LOST CIRCULATION MATERIAL

摘要

Compositions for lost circulation materials (LCM) and methods for using same in drilling and/or completing wellbores that help solve lost circulation problems in a wide range of fracture sizes, thereby advantageously eliminating the need for a variety of products for lost circulation in a field at any one time. The compositions provide specific LCM components in specific ratios that are analogs to lost circulation fractures and that yield superior performance in preventing or alleviating lost circulation in drilling and cementing boreholes. The compositions have a multi-modal particle size distribution (PSD) which provides a higher concentration of component materials in the same range of two or more fracture widths or median pore size diameters, thus allowing plugging to occur over a wider range than a single mode or narrow PSD.