Simulation and Analysis of Long-Term CO2 Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="1"><hr/></td></tr><tr><td class="align_left">Reaction 1: dissolution of CO2:</td></tr><tr><td class="align_left">CO2(gas) ↔ CO2(aq); CO2(aq) + H2O ↔ H2CO3; H2CO3↔ H+ + <svg height="14.7403pt" id="M45" style="vertical-align:-3.943601pt" version="1.1" viewbox="-0.0498162 -10.7967 39.48 14.7403" width="39.48pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M729 650H468V622C546 615 554 610 554 527V365H213V527C213 610 221 616 297 622V650H38V622C120 616 128 611 128 527V123C128 39 120 34 40 28V0H303V28C221 34 213 40 213 123V322H554V123C554 39 546 34 460 28V0H728V28C647 34 639 39 639 123V527C639 610 647 615 729 622V650Z" id="g121-70"></path></g><g transform="matrix(.013,0,0,-0.013,9.801,0)"><path d="M614 175C564 76 510 21 408 21C256 21 146 149 146 336C146 488 235 629 402 629C510 629 570 586 597 480L626 488C620 541 614 582 606 638C578 643 510 665 429 665C206 665 44 527 44 316C44 157 153 -15 402 -15C474 -15 558 5 586 11C604 45 629 119 643 165L614 175Z" id="g121-65"></path></g><g transform="matrix(.013,0,0,-0.013,18.538,0)"><path d="M381 665C170 665 44 498 44 318C44 125 188 -15 369 -15C552 -15 703 117 703 333C703 534 550 665 381 665ZM359 629C491 629 601 517 601 306C601 114 502 21 390 21C249 21 146 158 146 346S248 629 359 629Z" id="g121-77"></path></g><g transform="matrix(.0091,0,0,-0.0091,28.355,3.784)"><path d="M290 377C321 398 342 415 358 430C378 450 389 473 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z" id="g50-52"></path></g><g transform="matrix(.0091,0,0,-0.0091,33.301,-5.741)"><path d="M556 236V289H56V236H556Z" id="g54-33"></path></g></svg>; <svg height="14.7403pt" id="M46" style="vertical-align:-3.943601pt" version="1.1" viewbox="-0.0498162 -10.7967 39.48 14.7403" width="39.48pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M729 650H468V622C546 615 554 610 554 527V365H213V527C213 610 221 616 297 622V650H38V622C120 616 128 611 128 527V123C128 39 120 34 40 28V0H303V28C221 34 213 40 213 123V322H554V123C554 39 546 34 460 28V0H728V28C647 34 639 39 639 123V527C639 610 647 615 729 622V650Z" id="g121-70"></path></g><g transform="matrix(.013,0,0,-0.013,9.801,0)"><path d="M614 175C564 76 510 21 408 21C256 21 146 149 146 336C146 488 235 629 402 629C510 629 570 586 597 480L626 488C620 541 614 582 606 638C578 643 510 665 429 665C206 665 44 527 44 316C44 157 153 -15 402 -15C474 -15 558 5 586 11C604 45 629 119 643 165L614 175Z" id="g121-65"></path></g><g transform="matrix(.013,0,0,-0.013,18.538,0)"><path d="M381 665C170 665 44 498 44 318C44 125 188 -15 369 -15C552 -15 703 117 703 333C703 534 550 665 381 665ZM359 629C491 629 601 517 601 306C601 114 502 21 390 21C249 21 146 158 146 346S248 629 359 629Z" id="g121-77"></path></g><g transform="matrix(.0091,0,0,-0.0091,28.355,3.784)"><path d="M290 377C321 398 342 415 358 430C378 450 389 473 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z" id="g50-52"></path></g><g transform="matrix(.0091,0,0,-0.0091,33.301,-5.741)"><path d="M556 236V289H56V236H556Z" id="g54-33"></path></g></svg>↔ H+ + <svg height="15.535pt" id="M47" style="vertical-align:-3.9436pt" version="1.1" viewbox="-0.0498162 -11.5914 34.0896 15.535" width="34.0896pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M614 175C564 76 510 21 408 21C256 21 146 149 146 336C146 488 235 629 402 629C510 629 570 586 597 480L626 488C620 541 614 582 606 638C578 643 510 665 429 665C206 665 44 527 44 316C44 157 153 -15 402 -15C474 -15 558 5 586 11C604 45 629 119 643 165L614 175Z" id="g121-65"></path></g><g transform="matrix(.013,0,0,-0.013,8.736,0)"><path d="M381 665C170 665 44 498 44 318C44 125 188 -15 369 -15C552 -15 703 117 703 333C703 534 550 665 381 665ZM359 629C491 629 601 517 601 306C601 114 502 21 390 21C249 21 146 158 146 346S248 629 359 629Z" id="g121-77"></path></g><g transform="matrix(.0091,0,0,-0.0091,18.516,3.784)"><path d="M290 377C321 398 342 415 358 430C378 450 389 473 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z" id="g50-52"></path></g><g transform="matrix(.0091,0,0,-0.0091,23.463,-5.741)"><path d="M414 144C384 79 371 75 317 75H135L276 221C367 316 408 376 408 465C408 570 327 635 237 635C179 635 131 609 100 575L42 494L67 471C94 510 138 565 205 565C277 565 321 517 321 435C321 348 258 270 195 195C146 137 88 81 33 26V0H411C423 44 433 88 446 135L414 144Z" id="g50-51"></path></g><g transform="matrix(.0091,0,0,-0.0091,27.894,-5.741)"><path d="M556 236V289H56V236H556Z" id="g54-33"></path></g></svg></td></tr><tr><td class="align_left">Reaction 2: dissolution of chlorite:</td></tr><tr><td class="align_left">Mg2.5Fe2.5Al2Si3O10(OH)8 + 10H+↔ 2.5Mg2+ + 2.5Fe2+ + Al2Si2O5(OH)4 + Si(OH)4 + 5H2O</td></tr><tr><td class="align_left">Reaction 3: dissolution of oligoclase:</td></tr><tr><td class="align_left">CaNa4Al6Si14O40 + 6H+ + 19H2O ↔ Ca2+ + 4Na+ + 3Al2Si2O5(OH)4 + 8Si(OH)4</td></tr><tr><td class="align_left">Reaction 4: dissolution of illite:</td></tr><tr><td class="align_left">K0.6Mg2.5Al1.8(Al0.5Si3.5O10)(OH)2 + 5.6H+ + 1.8H2O ↔ 2.5Mg2+ + 0.6 K+ + 1.15Al2Si2O5(OH)4 + 1.2Si(OH)4</td></tr><tr><td class="align_left">Reaction 5: dissolution of albite</td></tr><tr><td class="align_left">2Na(AlSi3)O8 + 2H+ +9H2O ↔ 2Na+ + Al2SiO5(OH)4 + 4H4SiO4</td></tr><tr class="table-tr"><td colspan="1"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The main dissolution reactions in this study.

Geofluids

tab4

Table 4

Table 4: Simulation and Analysis of Long-Term CO2 Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin