Simulation Analysis of Gas Bubble Formation and Escape in Non-Newtonian Drilling Fluids

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Parameters</td><td class="align_center">Values</td><td class="align_center">Units</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Liquid density</td><td class="align_center">998.2</td><td class="align_center">Kg/m<sup>3</sup></td></tr><tr><td class="align_left">Liquid viscosity</td><td class="align_center">1.00</td><td class="align_center">mPa·s</td></tr><tr><td class="align_left">Gas density</td><td class="align_center">1.225</td><td class="align_center">Kg/m<sup>3</sup></td></tr><tr><td class="align_left">Gas viscosity</td><td class="align_center"><span style="width: 58.3896ptpx;"><svg height="11.786pt" id="M54" style="vertical-align:-0.3499002pt" version="1.1" viewbox="-0.0498162 -11.4361 58.3896 11.786" width="58.3896pt" 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="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M113 -12C146 -12 170 11 170 46C170 78 146 103 114 103S58 78 58 46C58 11 82 -12 113 -12Z"></path></g><g transform="matrix(.013,0,0,-0.013,9.204,0)"><path d="M447 623H65C61 580 56 530 47 475H76C100 541 106 550 172 550H388C308 376 196 170 91 -1L98 -12L172 -2C268 204 360 408 455 611L447 623Z"></path></g><g transform="matrix(.013,0,0,-0.013,15.446,0)"><path d="M244 635C114 635 38 519 38 422C38 317 111 240 217 240C236 240 255 244 277 256L345 292C311 140 203 39 59 15L64 -15C89 -15 150 -5 204 17C339 72 440 202 440 386C440 521 368 635 244 635ZM228 602C326 602 352 479 352 390C352 370 351 347 348 324C327 308 293 296 258 296C174 296 124 369 124 458C124 517 152 602 228 602Z"></path></g><g transform="matrix(.013,0,0,-0.013,24.593,0)"><path d="M528 54L331 254L528 455L492 493L294 291L96 493L60 455L257 254L60 54L96 16L294 217L492 16L528 54Z"></path></g><g transform="matrix(.013,0,0,-0.013,35.129,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.013,0,0,-0.013,41.369,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,47.656,-5.741)"><path d="M556 236V289H56V236H556Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,53.216,-5.741)"><path d="M158 548H390L417 615L410 623H122L83 318C105 326 143 337 185 337C296 337 350 275 350 188C350 116 308 42 225 42C164 42 122 74 100 93C90 101 82 99 72 92C60 82 51 68 50 59C48 46 52 38 66 24C82 9 125 -12 172 -12C225 -11 292 15 346 59C408 108 437 166 437 226C437 309 371 397 242 397C214 397 170 382 133 369L158 548Z"></path></g></svg></span></td><td class="align_center">mPa·s</td></tr><tr><td class="align_left">Surface tension</td><td class="align_center">0.073</td><td class="align_center">N/m</td></tr><tr><td class="align_left">Gravity</td><td class="align_center">9.81</td><td class="align_center">m/s<sup>2</sup></td></tr><tr><td class="align_left">Orifice radium</td><td class="align_center">0.8</td><td class="align_center">Mm</td></tr><tr><td class="align_left">Flow rate</td><td class="align_center">150</td><td class="align_center">ml/h</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Calculation results and experimental verification conditions.</div>

Geofluids

tab1

Table 1

Table 1: Simulation Analysis of Gas Bubble Formation and Escape in Non-Newtonian Drilling Fluids 