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| THE THEORETICAL STUDY OF r-DIRECTION ELECTRIC FIELD VALUE APPLICATION OF THE HORIZONTAL ELECTRIC DIPOLE |
| YUAN Bo1, LI Di-quan1, CHENG Dang-xing2,3 |
1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Exploration & Development Research Institute, Changqing Oilfield Company of PetroChina, Xi'an 710018, China;
3. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, PetroChina, Xi'an 710018, China |
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Abstract Depending on the formula of electromagnetic field data from horizontal electric dipole under the quasi-static conditions, this paper deals with the measurement sector and advantages of electric field r-direction. Through numerical calculation of several typical layered models such as D, G, H and K, the Er apparent resistivity is compared with the Ex apparent resistivity under 1-D conditions. The result shows that the measuring position has less effect on Er apparent resistivity. Through numerical calculation of a single anomalous body existent in half-space by using the integral equation method, the Er apparent resistivity is compared with the Ex apparent resistivity under 3-D conditions. The result shows that the Er apparent resistivity has a better effect on the edge of the low-resistivity anomalous body.
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Received: 10 January 2013
Published: 10 February 2014
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