SPE Reservoir Evaluation & Engineering
Volume 13, Number 4, August 2010, pp. 667-678

SPE-116123-PA

Determination of Intrinsic Dip and Azimuth From LWD Azimuthal-Propagation Resistivity Measurements in Anisotropic Formations

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DOI  More information 10.2118/116123-PA http://dx.doi.org/10.2118/116123-PA

Citation

  • Fang, S., Merchant, A., Hart, E., and Kirkwood, A. 2010. Determination of Intrinsic Dip and Azimuth from LWD Azimuthal Propagation Resistivity Measurements in Anisotropic Formations. SPE Res Eval & Eng  13 (4): 667-678. SPE-116123-PA. doi: 10.2118/116123-PA.

Discipline Categories

  • 6.6 Reservoir Monitoring/Formation Evaluation
  • 6.6.1 Well Logging
  • 6.1.1 Exploration, Development, Structural Geology

Keywords

  • formation anisotrophy, azimuthal measurements

Summary

With the use of both azimuthal-propagation-resistivity (APR) and main- and cross-component data, the resistivity anisotropy and its dip and azimuth angles of a massive formation (anisotropic shale or laminated sand) can be determined. The accuracy of the determined parameters depends on the amount of available data. The minimum amount of data required is two frequency main components and real and quadrature cross components. The boundary effects will distort the solution eventually; however, the anisotropy-enhanced processing will minimize the effects to extend the algorithm to a certain distance away from a boundary.

© 2010. Society of Petroleum Engineers

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History

  • Original manuscript received: 16 July 2008
  • Meeting paper published: 22 September 2008
  • Revised manuscript received: 12 June 2009
  • Manuscript approved: 23 August 2009
  • Published online: 12 August 2010
  • Version of record: 24 August 2010