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Essentials of Geopressure Analysis (1 Day)

Who should take this course?

This course serves as an introductory pore pressure course for drilling managers, drilling engineers, drilling foremen, new engineers, petrophysicists, geoscientists, geologists and others involved in pore pressure prediction. Essentials of Geopressure Analysis is meant for those who do not regularly use Drillworks® Predict or perform pressure analyses using petrophysical techniques.

This course is ideal for managers, drilling supervisors, engineers and those petroleum specialists who need to understand the results and techniques of geopressure modeling, but do not require the detailed knowledge to operate as a dedicated geopressure analyst.

Course Overview

This introductory course is designed to give students an introductory knowledge of the underlying concepts and methods required to perform geopressure analysis. 

The course will cover effective stress modeling using log measurements to perform clay compaction modeling.  Primary and secondary pressuring mechanisms will be discussed at an introductory level including compartment geometry (centroid) and fluid (buoyancy) effects.  Students will also be taught which techniques are the most certain and uncertain while learning how to calibrate to readily available information such as drilling observations and wireline electric logs. 

Essentials of Geopressure Analysis will be focused on practical versus theoretical techniques that will allow supervisors to evaluate the credibility of the modeled results and consider them appropriately in the well construction decision making process.

Prerequisites

This class assumes the student brings a basic knowledge of petrophysics, geophysics and drilling operations.

DAY 1

Essentials of Geopressure Analysis
  1. Basic geopressure definitions
  2. Geopressure causes
  3. Geopressure indicators (drilling/petrophysical)
  4. Basic pore pressure models and terminology
    1. Terzaghi’s Equation
    2. Calculating overburden gradient
    3. Calculating pore pressure using Eaton’s method and velocity/effective stress relations
    4. Interpretation pitfalls and complications
  5. Fracture gradient models