Table 29.2 Formation leak-off and mini-frac closure pressures, Western Canada Sedimentary basin

 

Well identification

Type of measurement

Depth in metres below K.B.

Closure stress in MPa

Depth- normalized gradient of SHmin in kPa/m

Comments

12-30-11-1W5

Leak-off

735

18.4

25.0

? High tensile strength
13-14-33-10W4

Leak-off

1285

21.3

16.6

Max value for SHmin
06-33-34-28W4

Leak-off

2542

45.8

18.0

Max value for SHmin
11-27-35-5W5

Leak-off

3590

74.1

20.6

Max value for SHmin
07-33-36-10W5

Leak-off

3300

73.1

22.2

Max value for SHmin
12-10-38-7W5

Leak-off

2096

34.4

16.4

Max value for SHmin
16-19-38-7W5

Leak-off

2095

35.7

17.0

Max value for SHmin
11-03-39-11W5

Leak-off

751

19.3

25.7

? High tensile strength
14-24-40-25W4

Leak-off

1490

17.7

11.9

Max value for SHmin
11-27-42-16W5

Leak-off

3410

52.2

15.3

Max value for SHmin
16-10-47-1W5

Leak-off

2060

39.5

19.2

Max value for SHmin
08-14-47-13W5

Leak-off

3286

51.7

15.7

Max value for SHmin
03-27-47-16W5

Leak-off

3822

74.1

19.4

Max value for SHmin
05-13-48-13W5

Leak-off

2952

51.5

17.4

Max value for SHmin
12-13-48-13W5

Leak-off

3189

44.2

13.9

Max value for SHmin
11-09-48-12W5

Leak-off

3040

56.9

18.7

Max value for SHmin
06-22-54-21W5

Leak-off

3093

47.4

15.3

Max value for SHmin
12-07-55-19W5

Leak-off

2964

67.2

22.7

Max value for SHmin
07-05-58-6W6

Leak-off

1835

43.4

23.7

Max value for SHmin
06-12-62-25W4

Leak-off

970

10.8

11.1

? Injection pressure
07-25-62-6W6

Leak-off

605

8.7

14.4

Max value for SHmin
15-11-78-8W5

Leak-off

1704

26.7

15.7

Max value for SHmin
03-01-78-6W6

Leak-off

2330

30.8

13.2

Max value for SHmin
08-36-80-16W5

Leak-off

3510

39.9

11.4

? Injection pressure
10-16-88-3W5

Leak-off

573

15.5

27.0

? High tensile strength
09-36-89-9W6

Leak-off

1693

22.3

13.2

Max value for SHmin
05-17-90-24W5

Leak-off

1884

28.5

15.1

Max value for SHmin
14-27-91-7W5

Leak-off

768

12.0

15.6

Max value for SHmin
03-20-95-6W5

Leak-off

697

14.4

20.7

Max value for SHmin
01-03-96-6W5

Leak-off

688

16.4

23.8

Max value for SHmin
03-36-96-11W5

Leak-off

620

14.3

23.1

Max value for SHmin
10-29-96-11W6

Leak-off

500

13.6

27.2

? High tensile strength
13-20-97-10W5

Leak-off

501

10.9

21.8

Max value for SHmin
13-06-109-6W6

Leak-off

1741

19.1

11.0

? Injection pressure
14-27-117-3W6

Leak-off

1107

19.8

17.9

Max value for SHmin
08-17-36-6W5

Mini-frac

2741

36.4

13.3

 
11-25-36-5W5

Mini-frac

2131

39.2

18.4

 
03-05-38-8W5

Mini-frac

2922

41.4

14.2

 
12-21-37-3W5

Mini-frac

2253

36.4

16.2

 
14-08-39-3W5

Mini-frac

1510

22.1

14.6

 
13-08-37-9W5

Mini-frac

3314

54.4

16.4

 
06-14-38-9W5

Mini-frac

3005

52.2

17.4

 
 

Mini-frac

2454

41.7

17.0

 
08-04-37-5W5

Mini-frac

2505

45.0

18.0

 
09-24-41-25W4

Mini-frac

1545

21.3

13.8

 
06-14-43-26W4

Mini-frac

1415

20.7

14.6

 
08-15-45-4W5

Mini-frac

1238

20.2

16.3

Most of the closure
14-01-46-4W5

Mini-frac

1734

23.5

13.6

strrees magnitudes
06-11-46-28W4

Mini-frac

1618

19.3

11.9

obtained from mini-frac
08-24-49-26W4

Mini-frac

1337

20.4

15.3

pressure records
04-02-50-6W5

Mini-frac

1581

22.5

14.2

are likely to
14-11-47-3W5

Mini-frac

1025

15.7

15.3

underestimate SHmin
15-12-48-9W5

Mini-frac

1620

24.5

15.1

magnitudes, because
06-01-49-7W5

Mini-frac

1381

18.6

13.5

the mini-fracs have
16-03-48-2W5

Mini-frac

908

14.0

15.4

frequently been run in
08-31-49-6W5

Mini-frac

1257

19.0

15.1

reservoirs where the
10-15-49-6W5

Mini-frac

1361

17.0

12.5

fluid pressure has been
06-29-49-6W5

Mini-frac

1329

20.0

15.0

lowered through
10-33-19-5W5

Mini-frac

1295

20.0

15.4

hydrocarbon production
04-05-50-6W5

Mini-frac

1327

18.0

13.6

 
06-36-50-28W4

Mini-frac

1393

21.2

15.2

 
08-09-51-27W4

Mini-frac

1300

18.2

14.0

 
16-28-52-8W5

Mini-frac

1799

28.3

15.7

 
13-31-46-15W5

Mini-frac

2001

25.8

12.9

 
05-08-47-15W5

Mini-frac

2074

22.1

10.7

? Pore fluid pressure
14-32-46-16W5

Mini-frac

2197

38.0

17.3

 
04-05-47-15W5

Mini-frac

1973

32.5

16.5

 
05-20-47-14W5

Mini-frac

1979

23.0

11.6

 
16-29-45-12W5

Mini-frac

2528

45.0

17.8

 
11-12-49-18W5

Mini-frac

2433

41.5

17.1

 
03-26-49-20W5

Mini-frac

2656

46.9

17.7

 
02-23-51-13W5

Mini-frac

1820

28.9

15.9

 

 

 

Last modified: August 22, 2008
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