analisis del tipos de curva

8/13/2019 Analisis Del Tipos de Curva

1/17

Type Curve Analysis of Well Test

Datos para la Identificacion de losEfectos del Limite


2/17

1a Distance to Fault from "Stewart"

Type Curve AnalysisTime Match Point

Pressure derivative Match Point

L= 0.0002637

kct

tMP

tD/LD2

MP

k =141.2qB

hpwD

'MP

p'MP


3/17


4/17

1b Distance to non-sealing Fault

"Abbaszadeh-Cinco"

Time Match Point

Pressure derivative Match Point

L= 0.0002637 k

ct

tMP

tD/LD2 MP

k =141.2qB

hpwD

'MP

p'MP


5/17


6/17


7/17

Que es lo vamos a aprender?

Ecuacion de la Difusividad Radial

Dimensionless variables (factores de conversion)

Condiciones Initiales y de Limite (outer, inner)

Soluciones, varias aproximaciones, derivativa del

well testing

Superposicion en el espacio y tiempo

Build-up analysis

Time regions

Plots and metodos

Parametros que se pueden obtener


8/17

Radial diffusivity eq

Dimensionless Radius

Dimensionless Time

Dimensionless Pressure

Dchttt

Dchrrr

Dchi pppp

t

p

k

c

r

pr

rr

t

1

D

D

D

DD

DD t

p

r

pr

rr

1


9/17

1. Dimensionless Radius

2. Dimensionless Time

3. Dimensionless pressure

Dchttt

Dchrrr

wch rr

kcrt tw

ch

2

kh

Bqpch

2

Dchi pppp


10/17

hr

0002637.0

1

md

psi

1cpft

1

2

psi007082.0

1

ftmd

cpday

bbl

2

1

tcr

kt

tw

D

20002637.0

1 md = 9.869233 10-16 m2

1 bbl = 0.1589873 m3

1 psi = 6894.757 Pa

1 ft = 0.3048 m1 cp = 0.001 Pa s

1 day= 243600 s

1 hr = 3600 s

ppBq

khp iD

007082.0 pp

Bq

khp iD

2.141

1or


11/17

Infinite-Acting

D

D

D

DD

DD t

p

r

prrr

1

0),(0

DtDDD rtp

11

DrD

DD

r

pr Inner boundary: constant rate

initial

0, DrDDD trp

No outer boundary, virgin pressure "at very far"

Cylindrical solution

Line source solution (Exp Integral)

Log approximation


12/17

Other outer boundary conditions

No flow: circular shape

No flow: rectangular area (MBH method)

Constant pressure outer boundary

0

eDD rrD

DD

r

pr

0),( eDD rrDDD

trp

0

eDD xxD

D

x

p


13/17


14/17

Build-up analysis

Type curve Concept Derivative

Match

Time regions

Wellbore storage distortion Middle time:

Line source solution (Exp Integral solution)

Log approximation

Superposition in time

MDH (k, s)

Horner (k,s, p*)

Late time Modified Muskat


15/17

Distance to fault in otherwise infinite

acting reservoir

Horner analysis: double slope (for fault)

Type Curve Analysis (derivative) (for fault)

Average pressure (in not infinite acting)

Horner+MBH

Modified Muskat


16/17


17/17

analisis del tipos de curva

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