Applied Three-Dimensional Subsurface Geological Mapping: With Structural Methods, 3rd Edition

Chapter 3. Measuring Depth, Directionally Drilled Wells, and Directional Surveys^*

* For all figures in this chapter (in the printed book only), see the preface for information about registering your copy on the InformIT site for access to the electronic versions in color.

Introduction

Accurate subsurface maps require that the data used to construct those maps be placed in the correct X (latitude) and Y (longitude) position. For many maps, especially depth structure maps but also net pay, isotherm, and isobar maps, it is important that data also be properly located in Z (depth) as well. There are significant uncertainties in all of these measurements (X, Y, and Z). It is important that geoscientists understand the sources and magnitudes of these ...