This article aims to understand how to perform various directional drilling survey calculation methods and terminology. We will provide a simple Excel spreadsheet to help in your calculations as an average angle, radius of curvature & minimum curvature Directional surveying spreadsheet. Nowadays, you will find a lot of software for directional drilling survey calculation methods. …
Definitions Ellipsoid is the name of the volume obtained when an ellipse is rotated about one of its axes. Specifically, an oblate spheroid is an ellipse rotated about the shorter (semi-minor) axis. The Earth is not an exact ellipsoid, and deviations from this shape are continually evaluated. The curvature of the Earth’s surface is not …
Sedimentary rock types Terrigenous sediments (clastic) These are land derived sediments sub-divided further on the basis of their grain size. Clay 1- Clay minerals are hydrous platy aluminosilicates. 2- Clay minerals can be subdivided into five important groups with different chemical and physical characteristics; kaolinite, illites, smectites, chlorites and glauconites. 3- “shale”, generally used to …