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 carbon dioxide (CO 2 ) resistant hydraulic 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.
2. The hydraulic cementitious composition according to claim 1 , wherein the basalt powder is obtained from the group selected from artificial basaltic rocks, ballast, chips, crushed stone, coarse aggregate and/or fine aggregate.
3. The hydraulic cementitious composition according to claim 1 , wherein the basalt powder comprises, mostly, the components selected from the group of Andesine, Augite, Orthoclase and Quartz, Sanidine, Magnetite, Ilmenite, Iron Forsterite and/or Goethite.
4. The hydraulic cementitious composition 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.
5. The hydraulic cementitious composition 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.
6. The hydraulic cementitious composition according to claim 1 , wherein the particle size of the basalt powder is up to 80% smaller than the class G cement powder.
7. The hydraulic cementitious composition 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.
8. The hydraulic cementitious composition according to claim 1 , wherein comprises a chemical resistance gain to 31.2% to CO 2 degradation due to low porosity and permeability.
9. The hydraulic cementitious composition according to claim 1 , wherein there is a decrease in the permeability and porosity of the material in an acidic medium in subsurface.
10. A process for obtaining a hydraulic cementitious composition of claim 1 comprising basalt powder (BP) as a supplementary cementitious material (SCM) in dry base cement powder comprising the steps of:
a) milling of basalt, a civil construction aggregate, to obtain a powder;
b) sieving the obtained powder;
c) subjecting the powder to dry physical mixing with the base cement powder, to produce a completely homogenized mixture;
d) preparing a cementitious material, comprising the mixture of step c) combined with hydration water and one or more additives, forming a cement paste;
e) adjusting the concentration of the cementitious paste to modify one or more parameters of the cementitious paste, wherein the one or more parameters comprises pumpability, setting time, density and/or mechanical strength;
f) performing cementation, re-cementing and/or plugging, using the cementitious paste adjusted in step f),
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.
11. The process according to claim 10 , wherein the basalt is milled in an industrial ball mill.
12. The process according to claim 10 , wherein the water/cement ratio is from 0.30 to 0.50, on a dry basis, without compensating for the basalt powder content.
13. The process according to claim 10 , wherein the total amount of additives comprises from 0.001 to 40% by weight of the cement paste.