Tag Archive: reservoir engineering

Material Balance Equations Exam Preparation

Limitations & Assumptions

Limitations

The most significant limitation of the MB calculation is that there is no time factor included. That means that while a material balance calculation can tell us what happened, it can’t tell us when it happened. If we combine the material balance calculations with other methods it is possible to infer time information. The combination between the time information from well productivity equations and the pressure/production information from MBE can give time details. (more…)

How To Solve A Water Influx Exercise With Worked Solutions

The Hurst and van Everdingen model is used to solve for height and cumulative water influx of a partially radial reservoir and aquifer.

An aquifer provides water drive to an oil reservoir. The shape of the reservoir is such that it does not form the full radial shape but a 60 degree wege. The supporting aquifer is considered infinite. The reservoir radius is 27,000ft.Water Influxwater influx data table

First calculate height of reservoir if after two years 150,000 bbls of water were found to have influxed from the aquifer. (more…)

Reservoir Engineering Theory: Proven, Probable and Possible.

This is written theory. No calculations are included. The material has been written in my own words and for the purpose of improving my knowledge of exam based topics in the Master of Science in Petroleum Engineering semester one course – Reservoir Engineering 1 at Heriot Watt University.

Reserves Definition: It is important to get this definition correct close to word-by-word. Reserves are those quantities of materials that are anticipated to be economically commercially recoverable from known accumulates from a specific date forward. (more…)

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