Combination of fluid loss control additive and lost circulation materials to control losses in formation
The present disclosure provides methods, compositions, and systems embodying cement compositions and the synergistic effect of lost circulation materials (LCMs) and fluid loss control additives (FLCAs) thereupon for cementing subterranean zones. A method of subterranean well cementing, comprising providing a cement composition comprising a hydraulic cement, a first FLCA, an LCM, and water, wherein the first FLCA comprises a water-soluble polymer with repeating units comprising a 5- to 6-membered cyclic amide; introducing the cement composition into a wellbore penetrating a subterranean formation, wherein inclusion of the first FLCA and the LCM in the cement composition fluid 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 300 Darcy; and allowing the cement composition to set in the subterranean formation.
1. A method of subterranean well cementing, comprising:
providing a cement composition comprising a hydraulic cement, a first fluid loss control additive, a lost circulation material, a suspending agent, water, wherein the first fluid loss control additive comprises a polyacryloylmorpholine polymer, wherein the lost circulation material has a particle size distribution of D10: 3 microns, D50: 65 microns, and D90: 560 microns;
adding a second fluid loss control additive to the cement composition, wherein the second fluid loss control additive a water-soluble polymer comprises at least one unit selected from the group consisting of a dimethyl group, a sulfomethyl group, a sulfonate group, and combinations thereof;
introducing the cement composition into a wellbore penetrating a subterranean formation, wherein inclusion of the first and 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 300 Darcy; and
allowing the cement composition to set in the subterranean formation.
2. The method of claim 1 , wherein the polyacryloylmorpholine polymer of the first fluid loss control additive comprises a copolymer selected from the group consisting of an acrylic acid and acryloylmorpholine copolymer, a methacrylic acid and acryloylmorpholine copolymer, an acrylamide and acryloylmorpholine copolymer, an N,N-dimethyl acrylamide and acryloylmorpholine copolymer, and combinations thereof.
3. The method of claim 1 , wherein the lost circulation material has a particle size distribution of from about 2 microns to about 570 microns.
4. The method of claim 1 , wherein the second fluid loss control additive comprises a graft polymer of 2-acrylamido-2methylpropane sulfonic acid and acrylamide.
5. The method of claim 1 , wherein the lost circulation material comprises petroleum coke, calcium carbonate, graphite, and walnut hulls.
6. The method of claim 1 , wherein the cement composition has a density of about 479 kg/m 3 to about 2396 kg/m 3 .
7. The method of claim 1 , wherein the cement composition has a density of about 839 kg/m 3 to about 1917 kg/m 3 .
8. The method of claim 1 , wherein the cement composition has a density of about 1198 kg/m 3 to about 1558 kg/m 3 .
9. The method of claim 1 , 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.
10. The method of claim 1 , wherein the cement composition further comprises a lightweight additive selected from the group consisting of sodium silicate, hollow microspheres, gilsonite, perlite, and combinations thereof.
11. The method of claim 10 , wherein the lightweight additive is present in an amount of about 0.1% to about 15% by weight of the cement composition.
12. The method of claim 1 , wherein the cement composition is a foamed cement composition.
13. The method of claim 12 , wherein the foamed cement composition has a density of about 479 kg/m 3 to about 1558 kg/m 3 .
14. A method of subterranean well cementing, comprising:
providing a cement composition comprising a hydraulic cement, a first fluid loss control additive, a lost circulation material, a suspending agent, clay, and water;
adding a second fluid loss control additive to the cement composition;
introducing the cement composition into a wellbore penetrating a subterranean formation, wherein inclusion of the first and second fluid loss control additives 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 300 Darcy; and
allowing the cement composition to set in the subterranean formation, wherein the suspending agent comprises diutan; wherein the first fluid loss control additive comprises a polyacryloylmorpholine-based polymer; and wherein the second fluid loss control additive comprises 2-acrylamido-2-methylpropane sulfonic acid and an acrylamide-based graft polymer; wherein the lost circulation material has a particle size distribution of D10: 3 microns, D50: 65 microns, and D90: 560 microns.
15. The method of claim 14 , wherein the lost circulation material comprises petroleum coke, calcium carbonate, graphite, and walnut hulls.
16. The method of claim 14 , wherein the cement composition has a density of about 839 kg/m 3 to about 1917 kg/m 3 .