Resistivity Logging for Reservoir Characterization

T., Hagiwara, Shell & Terry Research

K.M. Strack, KMS Technologies,

Q. Zhou, ChevronTexaco

During the past decade numerous new resistivity logging technologies and tools have been developed. Resistivity logging offers one of the most effective and economical ways to distinguish between hydrocarbon and water, and resistivity is one of the key parameters used in reserves calculation. The development of these new resistivity logging methods and devices were driven by the petrophysical evaluation of difficult formation environments such as thinly laminated pays and complex borehole conditions. Offshore and deepwater exploration activities have also spawned innovative LWD/MWD resistivity tools and geosteering applications, although the associated log interpretation in high deviation wells remains to be a challenge in some situations. Fast evolving reservoir production and monitoring activities lead to the cased hole resistivity logging to more accurately define the current reserves and to locate missed pays. These new resistivity technologies cover from small scale (borehole imaging tools) to large scale (Cross-well ElectroMagnetics) to meet various needs in hydrocarbon exploration and production.

In this short course we will review the basis of resistivity logging and address the new technologies of the last 10 years at the same time. Throughout the course, field and modeling examples will be used to support the technology discussion and illustrate the concepts. The technical material will be at the introductory and intermediate level of resistivity logging, while also covering advanced topics on multi-component induction and formation anisotropy, cased hole logging and reservoir monitoring, LWD measurements and high deviation well interpretation. Advanced concepts will also be explored to foresee the development of more integrated tools and interpretation.

Block 1

  • Welcome and introduction

  • History of resistivity logging

  • Laterologs & Shallow tools

Block 2

  • Induction tools

  • Integrating Rt w/ petrophysics

  • Modeling/inversion

Block 3

  • MWD/LWD resistivity tools

  • Advanced topics – Cased hole resistivity

  • Advanced topics – Anisotropy

Block 4

  • Advanced topics – High deviation well

  • Additional capability tools

  • Wrap up