# b_Radial Flow and Radius of Investigation - Pressure psi...

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1 Radial Flow and  Radius of Investigation

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2 Outline Importance to Schlumberger Applications and objectives of well testing Development of the diffusivity equation Definitions and sources for data used in  well testing
3 Importance to Schlumberger Treatment design Production prediction

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4 Radial Flow Reservoir Model Bulk formation h r w r
5 Approximations to Solution of the  Diffusivity Equation: + 2245 kt r c kh B q p p t i 2 10 1688 log 6 . 162 μ φ 01 0 948 2 . kt r c t < φ μ Short Term where  Long Term where   i p p 2245 10 948 2 φ μ kt r c t t p k c r p r r r 1 t φ μ =

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6 Pressure Profile During Drawdown t = 0 Distance from center of wellbore, ft Pressure, psi 2000 1000 1200 1600 1800 1400 1 10 1000 100 10000 t = 10000 hrs t = 0.01 hrs t = 1 hr t = 100 hrs
7 Pressure Profile During Buildup Distance from center of wellbore, ft

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Unformatted text preview: Pressure, psi 2000 1000 1200 1600 1800 1400 1 10 1000 100 10000 t = 0.01 hrs t = 1 hr t = 100 hrs t = 10000 hrs t = 0 8 Radius of Investigation Equations Radius of investigation for a given time time (t): Time required to reach a given radius of investigation r i : t i c 948 kt r φ μ = k r c 948 t 2 i t φ μ = 9 Exercise 1 Identify factors that increase, decrease, or do not affect radius of investigation. 10 Exercise 2 Calculate radius of investigation for an undersaturated oil reservoir 11 Exercise 3 Calculate radius of investigation for a low-pressure, high-permeability gas reservoir...
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## This note was uploaded on 04/05/2011 for the course PETE 689 taught by Professor Staff during the Spring '08 term at Texas A&M.

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b_Radial Flow and Radius of Investigation - Pressure psi...

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