01-Introduction to Well Testing

01-Introduction to Well Testing - Introduction to Well...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction to Well Testing 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Well Testing 2 Upon completion of this section, the student should be able to: 1. List 4 major objectives of well testing. 2. Define, give the units for, and specify typical sources for each of the following variables: net pay thickness, porosity, saturation, viscosity, formation volume factor, total compressibility, wellbore radius. 3. Be able to compute the total compressibility for different reservoir systems.
Background image of page 2
Introduction to Well Testing 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Well Testing 4
Background image of page 4
Introduction to Well Testing 5 A well test is conducted by Changing production rate at a well Measuring resulting pressure response at the same well or another well
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Well Testing 6 Exploration Is this zone economic? How large is this reservoir? Reservoir engineering What is the average reservoir pressure? How do I describe this reservoir in order to – estimate reserves? – forecast future performance? – optimize production? Production engineering Is this well damaged? How effective was this stimulation treatment? Why is this well not performing as well as expected?
Background image of page 6
Introduction to Well Testing 7 Define reservoir limits – Distances to boundaries – Drainage area Estimate average drainage area pressure Characterize reservoir – Permeability – Skin factor – Dual porosity or layered behavior Diagnose productivity problems – Permeability – Skin factor Evaluate stimulation treatment effectiveness – Skin factor – Fracture conductivity – Fracture half-length
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Well Testing 8 Single well tests Drawdown test –Produce a well at constant rate and measure the pressure response. Buildup test – Shut in a well that has been producing and measure the pressure response. Injection test – Inject fluid into a well at constant rate and measure the pressure response. Injection-falloff test – Shut in an injection well and measure the pressure response. Multi-well tests Interference test – Produce one well at constant rate and measure the pressure response at one or more offset wells. Pulse test – Alternately produce and shut in one well and measure the pressure response at one or more offset wells.
Background image of page 8
Introduction to Well Testing 9
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction to Well Testing 10 Obtained by combining Continuity equation Equation of state for slightly compressible liquids Flow equation - Darcy’s law
Background image of page 10
Introduction to Well Testing 11 The continuity equation is a restatement of the conservation of matter. That is, the rate of accumulation of fluid within a volume element is given by the rate at which the fluid flows into the volume minus the rate at which the fluid flows out of the volume.
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 35

01-Introduction to Well Testing - Introduction to Well...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online