Pump Fillage in Wells Producing Viscous Crude

Pump Fillage in Pump Fillage in Wells Producing Viscous CrudeWells Producing Viscous Crude

Henry Cumare Henry Cumare UPCO DE VENEZUELA, S. A.UPCO DE VENEZUELA, S. A.

2006 2006 International International Sucker Rod Sucker Rod

Pumping Pumping WorkshopWorkshop

Houston, TexasHouston, Texas -- September 14 September 14 -- 15, 200615, 2006

web: www.upcovzla.com

Opreration conditions

RESUMEN DIAGNOSTICO. CONDICIONES DE OPERACIÓN DE LA BOMBACAMPO BOSCAN-CHEVRON

45.1

22.025.3

29.0

9.0

36.0

0

10

20

30

40

50

INTERFERENCIA POR GAS LLENADO INCOMPLETO FUGA EN VALVULAS

(%)

1er PROYECTO 2do PROYECTO

Gas interference, leaking traveling valves y heavy crude incomplete fillage became the main reasons for losing pump and system efficiency en Boscan Field .

Pump % fillage ranged from 31.24% to a maximum of 96% A downhole gas separator could increase production by 20%

Parameters to identify incomplete fillage for gas interference1. Dynamometer card

In the Dynamometer card it can be observed incomplete fillage for gas interference

Well BN0532

0 221.5-2.5

0

2.5

5.0

7.5

10.0

12.5

15.0Fo Max

0 221.5-2.5

0

2.5

5.0

7.5

10.0

12.5

15.0Fo Max

Parameter to identify gas interference2. Fluid level. √3. Annular gas flow. √

01

23

45

67

89

1011

1213

1415

1617

1819

2021

2223

2425

26S

ec

31.6 mV

0 2.00-0.20

0

0.20

0.40

0.60

0.80

1.00

3.80

4.00

4.20

4.40

4.60

4.80

Delta Time (min.)

Delta

Pre

ssur

e(p

si)

Casing Pressure

(psi (g))

In this chart 41 wells presented incomplete fillage due to gas interference

Porcenaje de Llenado. Columna de liquido Equivalente libre de gas > 90 %

31

36 3638 39

40 4143 44 44

4649 50

54 5556 57

59 59 6061

64 6465 65

67 6869

7072 72 73 73 73

74 74 75

7982

88

95

32

6568

71

21 20 20

5755

20

6265

43

48

69

10

5558

43

33

22

69 6871

20

29

75

53

45

7067

15 15

76

21

1715

55

12

27

61

0

10

20

30

40

50

60

70

80

90

100

532 734 116 699 315 118 131 119 117 126 694 745 680 127 163 601 204 196 209 103 646 130 107 101 367 174 122 682 173 608 200 690 716 106 744 662 769 136 110 105 758

Pozos

% L

lena

do

% Llenado % Gas en el Anular

0 188.1-3.125

0

3.125

6.250

9.375

12.500

15.625Fo Max

PUMP FILLAGE 43 %

BN-119

BN-131

PUMP FILLAGE 41 %

Pump Conditions

0 182.3-1.5625

0

1.5625

3.1250

4.6875

6.2500

7.8125

9.3750Fo Max

24 BPD42.3 BPD

44 BPD 34 BPD

Incomplete Fillage for flowRestriction , High viscosity , Heavy crude

Incomplete fillage due to flow restriction in the pump intake , 90 % liquid

Porcenaje de Llenado. Columna de liquido Equivalente libre de gas > 90 %

4750

5355 56

6365

70 70

76 7780

83 84 8487 87 87

90

96

4

9 84

10

53

6

02

4 56

2 2

8

20

3

0

20

40

60

80

100

120

112 663 156 771 601 222 733 719 347 102 414 743 718 772 108 746 406 407 149 169

Pozos

% L

lena

do

% Llenado % Gas en el Anular

1-3/42-1/4 2-1/4

2-1/4 1-3/4

2-1/4 2-1/4

1-3/4 1-3/4

1-3/4 1-3/41-3/4

1-3/4 1-3/4 2-1/42-1/4 1-3/4 1-3/4

1-3/4

2-1/4

7.263.00 5.71

5.64 4.88

6.92 4.96

5.44 5.13

4.28 7.035.99

5.98 6.10 2.843.07 6.52 6.08

6.08

5.73

192240 240

216 216

240 216

216 120

144 114216

216 216 201216 120 120

240

240

ING. HERDLY ESCALANTE

Possible solutionsGas separator , and Hi Volume and compression valve

High compression and volume type valve Possible solution for this problem , before testing a gas separator

Questions ?Questions ?