US 11,807,806 B2
Combination of fluid loss control additive and lost circulation materials to control losses in formation
Sandip Prabhakar Patil, Pune (IN); Samuel Jason Lewis, The Woodlands, TX (US); Kyriacos Agapiou, Houston, TX (US); and Ganesh Shriniwas Pangu, Pune (IN)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,773.
Application 17/545,773 is a division of application No. 16/583,203, filed on Sep. 25, 2019, granted, now 11,225,596.
Prior Publication US 2022/0098467 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 43/12 (2006.01); C09K 8/487 (2006.01); C04B 18/162 (2023.01); C09K 8/03 (2006.01); C04B 28/02 (2006.01)
CPC C09K 8/487 (2013.01) [C04B 18/162 (2013.01); C04B 28/021 (2013.01); C09K 8/03 (2013.01); E21B 43/13 (2020.05); C09K 2208/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of subterranean well cementing comprising:
providing a cement composition comprising a hydraulic cement, a combination of a first fluid loss control additive and a second fluid loss control additive, a lost circulation material, and water,
wherein the first fluid loss control additive is different from the second fluid loss control additive,
wherein the first fluid loss control additive is present in an amount of about 0.05% to about 3% by weight of the cement composition and comprises a water-soluble polymer with repeating units comprising a 5- to 6-membered cyclic amide,
wherein the second fluid loss control additive is present in an amount of about 0.05% to about 3% by weight of the cement composition and comprises a water-soluble polymer comprising at least one unit selected from the group consisting of a dimethyl group, a sulfomethyl group, a sulfonate group, and combinations thereof, and
wherein the lost circulation material has a particle size distribution of from about 2 microns to about 570 microns;
introducing the cement composition into an annular space surrounding a conduit positioned in a subterranean formation, wherein inclusion of the first fluid loss control additive, the second fluid loss control additive, and the lost circulation material in the cement composition reduces fluid loss into the subterranean formation, wherein the subterranean formation has fractures with a width of from about 1 micron to about 800 microns, and wherein the subterranean formation has a permeability of about 1 milliDarcy to about 250 Darcy; and
allowing the cement composition to set in the annular space.