Engineering Concepts Made Easier

Building on engineering fundamentals and making engineering concepts easier

Formation Volume Factor (Bo)

The produced volumes measured at surface conditions are never equal to the volumes at reservoir conditions because of the differences ...
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Material Balance Drive Indices

Previously we presented the macroscopic material balance equation. It includes many terms that can bog you down if you do ...
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Material Balance Introduction

The material balance equation is one of the fundamental equations a reservoir engineer needs to understand. Some of it's applications ...
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Isothermal Compressibility

In petroleum engineering everything has compressibility including rocks, oil, and water. It's not just gases anymore. The concept of compressibility ...
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Fracture Pressure

Previously, we applied solid mechanics to determine the stress condition on a rock in the horizontal direction. So how does ...
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Rock Matrix Horizontal Stress

Previously, we learned that the rock in the formation is subject to a vertical compression load called the effective stress ...
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Rock Matrix Stress

When dealing with rocks, we are always interested in the fracture pressure. One application of fracture pressure is in drilling ...
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Overburden Pressure: What is it and Why is it important?

Overburden pressure is the vertical stress imposed by the overlying formation at a reference point below the surface. In other ...
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Bulk Density

In its simplest form, the subsurface consists of two things: 1) Rock grains and 2) fluid. Because we as petroleum ...
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