Experimental dissolution of dolomite by CO2-charged brine at 100°C and 150bar: Evolution of porosity, permeability, and reactive surface area

Balancing the amount and composition of gas contained in the pore space of cupriferous rocks

“…The mechanisms of gas accumulation and transportation in the pore space of both types of rock differ considerably. Both anhydrites and dolomites are virtually impermeable in relation to gases (Luhmann et al 2014;Feng et al 2017). Also, in these rocks, the phenomena of sorption and diffusion occur only to a small degree, in contrast to hard coal, which displays high sorption properties, and complex mechanisms of gas transportation that occur within the coal matrix.…”

Numerical Investigation into the Impact of CO2-Water-Rock Interactions on CO2 Injectivity at the Shenhua CCS Demonstration Project, China

“…Laboratory experiments related to CO 2 injection into sandstone and carbonate rocks have been reported in the previous studies [15,[18][19][20][21][22]. These experiments indicate that CO 2 -water-rock interactions can have a substantial effect on porosity and permeability, depending on fluid composition, rock mineralogy, and subsurface thermodynamic conditions.…”

Spectrophotometric Determination of pH Change of Formation Water Under High CO₂ Pressure Using a Mixed pH Indicator

“…Porosity and permeability, which are the most important factors in influencing the CO 2 sequestration potential of the reservoir, may be changed by the dissolution and secondary formation of the minerals [12][13][14][15] . In some cases, cap rock may be also dissolved due to the pH reduction of formation water and its sealing ability may be reduced [12][13][14][15] . Moreover, the pH reduction of formation water may also affect the insitu microbial conversion of CO 2 into CH 4 , which has attracted attention in recent years 16) .…”

“…Numerical analysis based on thermodynamic modeling of chemical reactions in formation water is used most often for predicting the pH 8,11,12,[17][18][19][20][21][22][23][24][25] .…”

“…The pH reduction of formation water may cause the dissolution of carbonate minerals and secondary mineral formation in reservoir [1][2][3][4][5][6][7][8][9][10][11][12] . Porosity and permeability, which are the most important factors in influencing the CO 2 sequestration potential of the reservoir, may be changed by the dissolution and secondary formation of the minerals [12][13][14][15] . In some cases, cap rock may be also dissolved due to the pH reduction of formation water and its sealing ability may be reduced [12][13][14][15] .…”