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Channel: Drilling Formulas and Drilling Calculations
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5 Steps To Heaven in Petroleum Geology

The 5 Steps to Heaven, which are source, migration, reservoir, seal and trap, is one of the most important concepts of petroleum geology. This tells us how petroleum was formed, migrated and trapped in...

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Rotary Friction Welding for Oilfield Drill Pipe

This is very interesting to see how the body of drill pipe and tool joint together using the rotary friction welding. The friction welding or FRW is solid-state welding process which generates the heat...

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What is Porosity?

Porosity is one of rock important rock properties and it is a measure of pore space in a rock. Figure 1 – Porosity (Ref: http://www.tulane.edu/~sanelson/images/pores.gif) Figure 1 shows the...

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Well Control

This page contains well control contents in this site. Basic Calculation Related to Well Control Adjusted maximum allowable shut-in casing pressure Brine weight with temperature correction Calculate...

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Rock Compressibility

Compressibility is a relative volume change of a fluid or solid in a response to a pressure change. We can relate this into a reservoir engineering aspect. Overburden pressure is rock weight and it...

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Absolute Permeability

Absolute permeability is an ability to flow fluid through a permeable rock when only one type of fluid is in the rock pore spaces.  The absolute permeability is used to determine relative permeability...

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Types of Flow and Rheology Models of Drilling Mud

When you learn about drilling mud, the rheological models are essential knowledge. The rheological models are critical for a drilling fluid study because they are used to simulate the characteristics...

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Fluid Saturation

Fluid saturation is how much each fluid is present in pore spaces of a rock. This will affect the ability of each fluid flow through porous media. This is one of critical values for reservoir...

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Rock Wettability

Wettability is a tendency of fluid to stick to the surface of formation when other types of fluid are present. Wettability of rock is measured by a core analysis in a laboratory and typically a...

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Capillary Pressure

Capillary pressure is a force due to differentials between fluid densities in a rock that can force pull hydrocarbon through the pores of a rock so a transition zone between fluids occurs. Let’s make...

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Effective and Relative Permeability

When there is only one type of fluid flowing through porous media, the permeability for this case is called “absolute permeability.” However, when there is more than one type of fluids present in a...

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Three Types of Reservoir Recovery

Reservoir drive mechanism is the manner in which various energy sources in a reservoir  provide energy to flow fluids in reservoir to surface. Recovery of reservoir fluid is categorized into three...

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How the Top Drive System works

This video shows detailed about top drive from Varco with a lot of operation aspect and it will help you learn a lot of details about Top Drive. We already add full the VDO transcript in order to help...

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Solution Gas Drive Mechanism

Solution gas drive is a mechanism by which dissolved gas in a reservoir will expand and become an energy support to produce reservoir fluid. Solution gas drive has other name, such as dissolved gas...

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Gas Cap Drive Mechanism

Some reservoirs have a gas cap, which provides energy from gas expansion to help production from a wellbore; therefore, this is called “gas cap drive”. When oil is being produced, the gas cap expands...

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Cement Calculator (Metric Unit) Excel Spreadsheet

Jonathan Lukye who is a supervisor from Sanjel in Estevan, Saskatchewan, Canada shares his cement Excel spreadsheet. He has been working on a Metric Cement Calculator in Excel. In the Excel...

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Water Drive Reservoir

Some reservoirs have communication with a water zone (aquifer) underneath. When reservoir pressure drops due to production, the compressed water in an aquifer expands into a reservoir and it helps...

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Oilfield is Beautiful – 15 spectacular images that will make you appreciate...

Oilfield is beautiful. Do you agree with us? We would like to share 15 spectacular images that will make you appreciate the beauty of oilfield. Semi submersible rig Winter and Pump Jack Well Test...

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What is Pumpjack?

Pumpjack (also known as donkey pumper, oil horse, pumping unit, nodding donkey, horsehead pump, beam pump, rocking horse, dinosaur, Big Texan, grasshopper pump, jack pump or thirsty birds) is...

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Material Balance Equation in Reservoir Engineering

Material balance is a mathematic way to express mass conservation in a reservoir and a simple key principle is “what reservoir is produced must be replaced by other mass.” Volume Produced = Volume...

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