Kuliah 5 Ipr With Skin

5/21/2018 Kuliah 5 Ipr With Skin

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IPR with SKIN or Flow

Efficiency

Muhammad Taufiq Fathaddin


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IPR with FE11. Standing Method

Where:

Rearrangement Eq. 1a, results in


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Example 1

Diketahui:Pr = 2000 psi = pb

FE = 0.5

Q = 1000 bpd @ pwfa= 500 psi1. Tentuka q max pada FE = 1

2. Tentukan q max pada FE = 0.5

3. Tentukan q pada pwf = 1000 dan FE = 0.5

4. Tentukan q pada pwf = 1000 dan FE = 1


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Solution

1. Determine qmax@FE=1=

Pwf = Pr(PrPwfa) FE = 2000(2000-500)0.5

= 1250 psi

Qmax,FE=1 = 1000/(1-0.2(1250/2000)-0.8(1250/2000)^2) = 1777.78 bpd


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IPR=1

pwf q

0 1777.78

200 1728.002

400 1649.78600 1543.113

800 1408.002

1000 1244.446

1200 1052.446

1400 832.001

1600 583.1118

1800 305.7782

2000 0

0

500

1000

1500

2000

2500

0 500 1000 1500

pwf,

psi

q, b/d


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Solution

2. Determine qmax@FE=0.5=

Pr = 2000 psi Pwf a= 0

Pwf = Pr(PrPwfa) FE = 2000(2000-0)0.5

= 1000 psi


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IPR FE=0.5

pwf q

0 1244.45

200 1209.605

400 1154.85

600 1080.183

800 985.6044

1000 871.115

1200 736.7144

1400 582.40261600 408.1796

1800 214.0454

2000 0

0

500

1000

1500

2000

2500

0 500 1000 1500

pwf,psi

q, b/d


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Solution

3. Find q for Pwf = 1000 psi and FE = 0.5

q=871.1 b/d


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Solution

3. Find q for Pwf = 1000 psi and FE = 1

q=1244.5 b/d


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IPR with FE12. Harrison Method

Where:

Rearrangement Eq. 1a, results in


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Example 1

Diketahui:

Pr = 2000 psi = pb

FE = 0.5, S = 2

Q = 1000 bpd @ pwfa = 500 psi1. Tentuka q max pada FE = 1

2. Tentukan q max pada FE = 0.5

3. Tentukan q pada pwf = 1000 dan FE = 0.5

4. Tentukan q pada pwf = 1000 dan FE = 1


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Solution

1. Determine qmax@FE=1=

Pwf = Pr

(Pr

Pwfa) FE = 2000

(2000-500)0.5= 1250 psi


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Solution

2. Determine qmax@FE=0.5=

Pr = 2000 psi Pwfa = 0

Pwf = Pr(PrPwfa) FE = 2000(2000-0)0.5

= 1000 psi


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Solution

3. Find q for Pwf = 1000 psi and FE = 0.5

Pr = 2000 psi Pwf = 0

Pwf = Pr(PrPwfa) FE

= 2000(20001000)0.5 = 1500 psi


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Solution

3. Find q for Pwf = 1000 psi and FE = 1


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IPR with SKIN FACTOR3. Pudjo Sukarno Method


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Given data:Pr = 1345 psia (Pb = 3000 psia)

A test shows q = 321 bpd at a flowing pressure of 719

psia.

API > 40 and S = 0, -5, and 5

Calculate:

(1). qomaxat 1345 psia @S=0

(2). Construct PRESENT IPR Curve For Skin Factor = 0, 5,

-5

Example # 3


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(1). qomaxat 1345 psia

Solution of Example # 3


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Pwf q0 432.4

200 422.6

400 396.9

600 354.6800 294.1

1000 211.8

1200 102.2

1345 0

Solution of Example # 3b. IPR Curve for S = 0


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Solution of Example # 3b. IPR Curve for S = 5

Pwf (psi) q (bpd)

0 279.9

200 270.8

400 251.7

600 222.2

800 181.5

1000 128.4

1200 61.1

1345 0


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Perbandingan IPR dengan dan Tanpa Skin


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METODE IPR with SKIN FACTOR4. Klins Method

The standard Vogel's method was modified by Klins et

alto explicitly account for the effects of bubble point

pressure and skin, as follows:


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Example 1Diketahui:

Pr = 2000 psi = pb

S = 2

Q = 1000 bpd @ pwf = 500 psi

1. Tentukan q max pada S = 0


3. Buat IPR untuk S = 0

4. Buat Kurva IPR untuk S = 25.Tentukan q pada pwf = 1000 dan S = 2

6. Tentukan q pada pwf = 1000 dan S = 0


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Solution1. Determine qmax@S=0=

n = (0.28+0.72*2000/2000)(1.235+0.001*2000)

= 3.24

M = 6.835/(6.835+0) = 1


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n = (0.28+0.72*2000/2000)(1.235+0.001*2000)

= 3.24

M = 6.835/(6.835+2) = 0.774


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Solution

3. IPR untuk Skin = 0

q Pwf

1088.9 0

1056.3 200

1020.5 400

977.0 600

921.0 800

847.0 1000

749.5 1200622.3 1400

459.4 1600

254.1 1800

0.0 2000

0

500

1000

1500

2000

2500

0.0 200.0 400.0 600.0 800.0 1000.0

Pwf,psi

q, bpd


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Solution

4. IPR untuk S = 2

0

500

1000

1500

2000

2500

0.0 200.0 400.0 600.0 800.0 1000.0

Pwf,psi

q, bpd

Pwf, psi q, STB/D

0 842.4

200 817.2

400 789.5600 755.8

800 712.5

1000 655.3

1200 579.8

1400 481.5

1600 355.4

1800 196.6

2000 0.0


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METODE IPR with SKIN FACTOR5. Gema-Taufiq Equation


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Example 1Diketahui:

Pr = 2000 psi = pb

S = 2

Q = 1000 bpd @ pwf = 500 psi



3. Buat IPR untuk S = 0

4. Buat Kurva IPR untuk S = 25.Tentukan q pada pwf = 1000 dan S = 2

6. Tentukan q pada pwf = 1000 dan S = 0


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Solution

3. IPR untuk S = 0

0

500

1000

1500

2000

2500

0.0 200.0 400.0 600.0 800.0 1000.0 1200.0

Pwf,

psi

q, bpd

Pwf, psi q, STB/D

0 1156.9

200 1104.7

400 1038.4

600 958.0

800 863.5

1000 754.9

1200 632.1

1400 495.31600 344.3

1800 179.2

2000 0


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Solution

4. IPR untuk Skin = 2

Pwf, psi q, STB/D

0 925.5

200 883.8

400 830.8600 766.4

800 690.8

1000 603.9

1200 505.7

1400 396.2

1600 275.4

1800 143.4

2000 0

0

200

400

600

800

1000

1200

1400

1600

1800

2000

0.0 200.0 400.0 600.0 800.0 1000.0 1200.0

Pwf,

psi

qo, STB/D


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Given data:Pr = 1345 psia (Pb = 3000 psia)

A test shows q = 321 bpd at a flowing pressure of 719

psia.

API > 40 and S =5

Calculate using Klins and G-T Methods

(1). qomaxat 1345 psia @S=0

(2). qomaxat 1345 psia @S= 5

(3). Construct PRESENT IPR Curve For Skin Factor = 0

and 5

Task

Kuliah 5 Ipr With Skin

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