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Analysis and application of the response characteristics of DLL and LWD resistivity in horizontal well

  • Borehole geophysics
  • Published:
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Abstract

There exist different response characteristics in the resistivity measurements of dual laterolog (DLL) and logging while drilling (LWD) electromagnetic wave propagation logging in highly deviated and horizontal wells due to the difference in their measuring principles. In this study, we first use the integral equation method simulated the response characteristics of LWD resistivity and use the three dimensional finite element method (3D-FEM) simulated the response characteristics of DLL resistivity in horizontal wells, and then analyzed the response differences between the DLL and LWD resistivity. The comparative analysis indicated that the response differences may be caused by different factors such as differences in the angle of instrument inclination, anisotropy, formation interface, and mud intrusion. In the interface, the curves of the LWD resistivity become sharp with increases in the deviation while those of the DLL resistivity gradually become smooth. Both curves are affected by the anisotropy although the effect on DLL resistivity is lower than the LWD resistivity. These differences aid in providing a reasonable explanation in the horizontal well. However, this can also simultaneously lead to false results. At the end of the study, we explain the effects of the differences in the interpretation of the horizontal well based on the results and actual data analysis.

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Acknowledgments

The authors extend their appreciation to the anonymous reviewers for their critical and constructive comments and suggestions that greatly improved the manuscript.

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Authors and Affiliations

  1. Petroleum Exploration & Production Research Institute, SINOPEC, Beijing, 100083, China

    Song Hu & Jun Li

  2. Research Institute of Petroleum Exploration & Development, Tarim Oil Field Branch Company, CNPC, Xinjiang, 841000, China

    Hong-Bo Guo

  3. Research Institute of Petroleum Exploration & Development, CNPC, Bejing, 100083, China

    Chang-Xue Wang

Authors
  1. Song Hu
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  2. Jun Li
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  3. Hong-Bo Guo
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  4. Chang-Xue Wang
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Corresponding author

Correspondence to Song Hu.

Additional information

This Study is supported by the National Science and Technology Major Project of China (Nos. 2016ZX05014-002-001, 2016ZX05002-005-001, and 2017ZX05005-005-005).

Hu Song was awarded his PhD from RIPED in 2014. He is currently a postdoctoral fellow in Petroleum Exploration and Production Research Institute of SINOPEC. His research interests focus on the numerical simulation of horizontal well and data interpretation. He is also interested in complex reservoir log interpretation and evaluation.

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Hu, S., Li, J., Guo, HB. et al. Analysis and application of the response characteristics of DLL and LWD resistivity in horizontal well. Appl. Geophys. 14, 351–362 (2017). https://doi.org/10.1007/s11770-017-0635-8

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  • DOI: https://doi.org/10.1007/s11770-017-0635-8

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