Hydraulic cement composition, process and use
The present invention describes a hydraulic cement composition, process and use thereof, wherein the composition comprises a hydraulic cement composition with increased resistance against carbon dioxide (CO 2 ) for application in reservoirs such as oil and gas and carbon capture and storage (CCS) wells; with improved performance of cement paste formulations as a material for application in primary, secondary cementing, recovery and/or plugging operations, of reservoirs/wells that operate with high CO 2 content; as a technological alternative to guarantee the integrity of wells in CO 2 -rich environments for long periods of time, without any additional intervention to the already current operational procedures for cementing wells, and with cost reduction in relation to class G cement (currently, the main raw material); and sufficient chemical resistance to carry out enhanced oil (EOR) and gas (EGR) recovery by injecting high levels of CO 2 , increasing reservoir pressure throughout the extraction period of hydrocarbon reservoirs.
1. A method of cementing, comprising the steps of:
a) obtaining a cementitious composition comprising basalt powder (BP) as a supplementary cementitious material (SCM) in dry base cement powder, wherein the basalt powder comprises a particle size equivalent to the fraction passing through a #325 mesh sieve, up to 0.044 mm and 4000-6000 m 2 /kg;
b) mixing the cementitious composition with water and optional additives to form a hydraulic cementitious composition; and
c) performing primary cementing, secondary cementing, recovery, and/or plugging of a subsurface reservoir, using the hydraulic cementitious composition.
2. The method according to claim 1 , wherein the cementing in step c) is performed on an injection, exploration, monitoring, production and/or enhanced recovery reservoir.
3. The method according to claim 2 , wherein the reservoir is configured for fluids comprising a concentration of a gaseous fraction of CO 2 that is between 5% and 100%.
4. The method according to claim 2 , wherein the reservoir is configured for carbon capture and storage (CCS).
5. The method according to claim 1 , wherein step c) is performed at a temperature between 4° C. and 260° C. and a pressure between atmospheric pressure and 34 MPa.
6. The method according to claim 1 , wherein the basalt powder is obtained from the group consisting of artificial basaltic rocks, ballast, chips, crushed stone, coarse aggregate and/or fine aggregate.
7. The method according to claim 1 , wherein the basalt powder comprises, components selected from the group consisting of Andesine, Augite, Orthoclase and Quartz, Sanidine, Magnetite, Ilmenite, Iron Forsterite and/or Goethite.
8. The method according to claim 1 , wherein the basalt powder comprises a concentration ranging from 0.01 to 9.99% by weight of dry base cement powder.
9. The method according to claim 1 , wherein the basalt powder comprises a supplementary cementitious material with pozzolanic activity up to 330 mg of Ca(OH) 2 consumption.
10. The method according to claim 1 , wherein the particle size of the basalt powder is up to 80% smaller than the class G cement powder.
11. The method according to claim 1 , wherein the basalt powder comprises an average specific surface area of 4000 to 6000 m 2 /kg and an average particle size of 13,316 to 8,877 Å.
12. The method according to claim 1 , wherein the hydraulic cementitious composition comprises a chemical resistance gain to 31.2% to CO 2 degradation due to a reduction of porosity and permeability in relation to the hydraulic cementitious composition without the basalt powder.
13. The method according to claim 1 , wherein there is a decrease in permeability and porosity of the hydraulic cementitious composition in an acidic medium in subsurface.