Patent ID: 6153562
Filing Date: 2000-11-28
Classification: C04B,C09K,E21B,Y10S

Abstract:
A well cement composition for use in performing cementing operations in a subterranean zone comprising a solid fraction of particles suspended in a liquid medium, the solid fraction consisting essentially of a coarse fraction and a fines fraction composed of fines particles having an average diameter less than 1 .mu.m, the coarse fraction being comprised of the solid particles in the liquid medium other than the fines particles, the packing volume fraction .PHI..sub.1 of the coarse fraction being greater than 0.8, and the solid volume fraction x of the fines particles being less than or equal to the volume fraction x.sub.0 such that ##EQU5## in which .PHI..sub.2 is the packing volume fraction of the species constituted solely by the fines particles.