The present invention describes a hydraulic cement composition, its obtaining process and its use. More precisely, the hydraulic cement composition comprises increased resistance to CO.sub.2 for application in subsurface fluid reservoirs.

A cementitious mixture to make structures with reduction of gas permeability was disclosed. The mixture includes, cementitious materials, and one or more divalent magnesium-iron silicate that in neutral or basic aqueous solutions have the capacity to be a latent hydraulic binder comprising 2% to 99% of divalent magnesium-iron silicate by weight of total hydraulic solid materials. This can be used to produce a cementitious structure for preventing gas transfer between a first region and a second region. A cement slurry was also disclosed.

A cementitious mixture to make structures with reduction of gas permeability was disclosed. The mixture includes, cementitious materials, and one or more divalent magnesium-iron silicate that in neutral or basic aqueous solutions have the capacity to be a latent hydraulic binder comprising 2% to 99% of divalent magnesium-iron silicate by weight of total hydraulic solid materials. This can be used to produce a cementitious structure for preventing gas transfer between a first region and a second region. A cement slurry was also disclosed.

A composition of matter, including a phlogopite powder or muscovite powder, clinoptilolite or mordenite, and kaolinite. The composition of matter is prepared as follows: 1) mixing the phlogopite powder or muscovite powder, the clinoptilolite or mordenite, and the kaolinite in a weight ratio of 50-70:0-30:0-50; adding a solution including isopropanol and n-butanol to a mixture of the phlogopite powder or muscovite powder, the clinoptilolite or mordenite, and the kaolinite, thereby yielding a mixed solution; 2) adding a silane coupling agent to the mixed solution, and continuously magnetically stirring the mixed solution for 30 min; adding distilled water to the mixed solution, and continuously magnetically stirring for 30 min; and adding methyl silicone oil to the mixed solution, and magnetically stirring for an hour, thereby yielding a slurry; and 3) drying the slurry at a temperature of 150-200 C.

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.sub.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.sub.2 content; as a technological alternative to guarantee the integrity of wells in CO.sub.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.sub.2, increasing reservoir pressure throughout the extraction period of hydrocarbon reservoirs.

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.sub.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.sub.2 content; as a technological alternative to guarantee the integrity of wells in CO.sub.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.sub.2, increasing reservoir pressure throughout the extraction period of hydrocarbon reservoirs.

A method for improving the air and/or water barrier performance of a building panel is disclosed. The building panel may be a gypsum board or cement board. In particular, the board may have improved resistance to bulk water penetration or permeation while maintaining breathability with respect to water vapor.

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.sub.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.sub.2 content; as a technological alternative to guarantee the integrity of wells in CO.sub.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.sub.2, increasing reservoir pressure throughout the extraction period of hydrocarbon reservoirs.

A method for improving the air and/or water barrier performance of a building panel is disclosed. The building panel may be a gypsum board or cement board. In particular, the board may have improved resistance to bulk water penetration or permeation while maintaining breathability with respect to water vapor.

Disclosed herein is a concrete article comprising: a plurality of pores having an average pore diameter of less than 1 micron as measured using mercury intrusion porosimetry (MIP) with a pressure of less than 440 MPa and overall porosity of less than 15% measured using helium porosimetry, wherein the concrete article exhibits a gas permeability of 10.sup.17 to 10.sup.22 m2 as measured under steady-state conditions (with an upstream chamber pressure of 0.31 MPa and a downstream chamber pressure of less than 5 Pa) and is configured to substantially prevent a gas leak. Also disclosed are methods of making the same articles.