Feasibility of Tunnel TEM Advanced Prediction: A 3D Forward Modeling Study

<div>Sketch of (a) traditional small-loop TEM device with one transmitting coil and (b) small-loop TEM device with two opposing coils. Red arrows represent the direction <svg height="8.62698pt" id="M57" style="vertical-align:-0.1933403pt" version="1.1" viewbox="-0.0498162 -8.43364 9.75571 8.62698" width="9.75571pt" 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="M724 650H480V616C554 612 574 595 579 552C582 523 587 476 587 387V211H584L201 650H16V616C59 612 81 604 100 580S120 538 120 472V264C120 176 114 131 110 98C106 55 83 39 27 35V0H272V35C198 38 181 57 176 101C173 131 168 176 168 264V488H171L587 -10H635V387C635 476 641 523 644 554C649 599 670 613 724 616V650Z"></path></g></svg> of global edges, green arrows represent the direction <svg height="9.25986pt" id="M58" style="vertical-align:-0.04981041pt" version="1.1" viewbox="-0.0498162 -9.21005 7.48522 9.25986" width="7.48522pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,.626,-.183)"><path d="M470 557C393 591 314 624 246 666H224C156 624 76 591 0 557L12 532C86 550 163 573 235 596C309 572 384 550 458 532L470 557Z"></path></g><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M549 0V32C497 40 491 42 491 105V294C491 394 441 454 360 454C331 454 312 445 282 426C260 412 240 396 220 383V456C161 439 95 425 39 418V390C87 380 92 377 92 317V109C92 42 88 41 26 32V0H267V32C225 38 220 42 220 104V346C246 366 268 377 294 377C330 377 363 355 363 283V113C363 42 358 38 316 32V0H549Z"></path></g></svg> of transmitting current, and numbers are global node identifiers.</div>

Geofluids

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Figure 1

Figure 1: Feasibility of Tunnel TEM Advanced Prediction: A 3D Forward Modeling Study 