| 摘要 |
<p>In one embodiment the invention comprises a system (10) for generating an image of an Earth formation surrounding a borehole (14) penetrating the formation. Resistivity of the formation is measured using a DC measurement (44, 45, 46, 38, 39, 40), conductivity and resistivity of the formations is measured with a time domain signal or AC measurement (48, 50, 33, 35). Acoustic velocity of the formation is also measured (52, 58). The DC resistivity measurement, the conductivity measurement made with a time domain electromagnetic signal, the resistivity measurement made with a time domain electromagnetic signal and the acoustic velocity measurement are combined (82, 84) to generate the image of the Earth formation.</p> |
