General

Reservoir Heterogeneities

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General

Why a pressure gauge near the perforations ?
ByTestWells

If the fluid density between the gauge and the perforations changes over time, the pressure gauge will not give a direct measurement of the pressure at the perforations. The pressure data will be affected by some wellbore dynamic effects and will not be suitable for well test analysis. The data will not be representative of...

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General

Radius of Investigation
ByTestWells

The radius of investigation concept is one of the most important concepts in pressure transient analysis. We will go through a bit of theory, define the radius of investigation and see how we can derive it from well test analysis. Theory Let’s assume a fully completed vertical well producing at constant rate q during...

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General

Production problem with an oil well AI-1
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fracture

Naturally-fractured reservoirs
ByTestWells

Following the article on Fracture Behaviour, this post looks at the types of transient responses and well tests that are expected in naturally-fractured reservoirs. Dual-porosity behaviour A dual porosity behaviour may be visible with the presence of a porous medium of negligible permeability (matrix) and a high permeability medium (natural fractures). In this case, the...

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General

Is the skin always representative of the well damage?
ByTestWells

Well AC-2 is a gas vertical well with a permanent downhole gauge at about 650mTVDss from the top perforations. This well started production a few weeks ago and a baseline/initial PBU test was acquired to monitor the well and reservoir performance over time. The PBU test from the permanent downhole gauge is shown in the...

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General

The Skin Factor
ByTestWells

When the reservoir production is established, the flowlines converge towards the well with a radial geometry. This defines the most fundamental flow regime in well testing: radial flow regime. As we have seen in the post Radius of Investigation and the training course Well Test Theory and Practice, the radial flow regime is defined at...

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Reservoir Heterogeneities

From this point, you are entering the well test area.

Please log in or join the Well Testing Group!

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Why a pressure gauge near the perforations ?

Radius of Investigation

Production problem with an oil well AI-1

Naturally-fractured reservoirs

Is the skin always representative of the well damage?

The Skin Factor

TestWells Ltd

27 Old Gloucester Street
WC1N 3AX London, UK

E: info@TestWells.com

Registered in London: 8757988

T: +44 20 3769 0017
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TestWells Ltd

27 Old Gloucester Street WC1N 3AX London, UK E: info@TestWells.com Registered in London: 8757988

T: +44 20 3769 0017LinkedIn

Menu

Popular Posts

27 Old Gloucester Street
WC1N 3AX London, UK

E: info@TestWells.com

Registered in London: 8757988

T: +44 20 3769 0017
LinkedIn