1. 10 Habits of Highly
Successful DFITs

2. What has the greatest effect
on the success of a DFIT?
A. Quality of gauge
B. Pump company
C. Rate
D. Volume
E. Length of monitoring period
F. Ability to Capture Data*
*AKA, don’t mess up the test

3. Habit #1
Communicate and ensure
everyone is on the same page

4. 1. Well Selection
2. Selection of Equipment
3. Installation of Equipment
4. Job Execution
5. After Job Procedure
Communicate, Communicate,
Communicate!

5. SPE 169539-MS, Barree, Miskimins, and Gilbert

6. Break Down
Observed,
Fracture
Initiated
Well Compressibility
Conclude Injection
with Stepdown and
Obtain ISIP
Increase to Max Rate
Quickly and Hold Constant

7. Habit #2
Keep a clean house and test
your equipment before
pumping

8. Have you ever asked to flush the lines
thoroughly?
Physical debris can cause majors issues
while you’re pumping
Bottle Cap Rock

9. Habit #3
Ensure that procedures and
installations do not conflict

10. What Happened here?

11. A Wellhead Isolation Tool required moving the
position of the pressure gauge during the test.
This resulted in lost data.

12. Pump 1 kicked out due to
exceeding pressure limit

13. Job continued to pump
with only one remaining
pump

14. Job was successfully
pumped with one pump
DO NOT fight equipment
issues if you don’t have to!

15. Habit #4
Always consider the weather
Always consult the temperature data!

16. What happened here?
Let’s look at the temperature
data and see

17. Anytime gauges have a
sustained temperature
below 30*F there’s a chance
of freezing at the wellhead

18. Freezing issues directly impact pressure responses.
Mitigate this possibility by checking the weather and
using wellhead heaters/insulation when possible

19. Habit #5
A procedure is only as good as
it is understood

20. In this next example the
operator told the field
personnel to pump methanol
to mitigate potential freezing
issues

21. Stepping up pressure to
open sliding sleeve

22. Sleeve opened and DFIT
performed

23. Well is shut-in and DFIT
begins to leakoff

24. Methanol was injected
to prevent freezing

25. Methanol was supposed to be pumped during the test
NOT AFTER!
This test was ruined because the field
DID NOT understand the procedure

26. Habit #6
Make quality data a PRIORITY
You get what you pay for

28. Rate Variance of
0.95 bbl/min
Pressure Variance of
360 psi
3.5 bbls more than
actually pumped, slight
effect on Permeability
Effects your ISIP,
Closure Pressure, and
Reservoir Pressure

29. Do NOT trust
the rate from
pump strokes!

30. Counting Pump Strokes
shows steady Rate
Turbine Rate comparison
highlights errors caused
by pumping efficiency

31. Acquiring actual injection
rate is critical since
injected volume is one of
the most important inputs
in the analysis

32. Habit #7
Consider how physical factors
effect your data and mitigate
them as much as you can

33. Surface Pressure shows
thermal effects

34. Bottom-hole Pressure fluctuates
even though the Bottom-hole
Temperature stays constant

35. Thermal fluid expansion can have
a significant effect on Pressure,
even bottom-hole Pressure
If you expect the possibility of
freezing events, understand that
this effects the entire wellbore,
not just the surface data

36. Habit #8
Be aware of
concurrent or nearby
operations

37. Plan for and anticipate frac hits!
This frac hit ruined this test

39. Habit #9
Always verify before
making changes

40. What happens next?

41. The pump company
forgot to isolate the
iron when rigging
down after the
injection

42. Ruining the test

43. Habit #10
Monitor your data!

44. Everything looks just fine right?

45. The well went on vacuum
almost 20 minutes later

46. Had this operator not been
monitoring their data, they
could have wasted WEEKS of
rental time and money

47. 1. Communication is critical
2. Clean up and test equipment
3. Does the procedure conflict with the reality?
4. Consider the weather
5. Is the procedure actually understood?
6. You get what you pay for – Quality is CRITICAL
7. Mitigate physical factors
8. Be aware of concurrent operations
9. Always verify
10. Monitor you test!
Habits That Promote Success

48. Questions?
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www.reservoirdata.com