System, method and computer program product for wellbore event modeling using rimlier data
A data mining and analysis system which analyzes clusters of outlier data (i.e., rimliers) to detect and/or predict downhole events.
1. A computer-implemented method to model downhole events, the method comprising:
extracting a dataset from a database, the dataset comprising normal wellbore data and outlier wellbore data;
clustering a plurality of the outlier data into a plurality of clusters;
segregating the plurality of clusters into a high density cluster and a low density cluster, wherein the high density clusters are utilized as a rimlier;
analyzing the rimlier to determine data variables within the rimlier that indicate a downhole event, wherein the analyzing comprises:
determining a Head Rimlier Factor as defined by:
E
h
E
r
=
Σ
-
p
h
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
;
and
determining a Tail Rimlier Factor as defined by:
Et
E
r
=
Σ
-
p
t
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
,
wherein E h is entropy of head data, p h is probability of the head data, E r is entropy of rimlier data, p r is probability of the rimlier data, E t is entropy of tail data, and p t is probability of the tail data,
wherein the Head Rimlier Factor and the Tail Rimlier Factor are utilized to determine the data variables indicating the downhole event; and
modeling the downhole event based upon the analysis of the rimlier,
wherein a wellbore is drilled, completed or stimulated in accordance to the modeled downhole events.
2. A computer-implemented method as defined in claim 1 , further comprising removing corrupted data from the extracted dataset.
3. A computer-implemented method as defined in claim 1 , wherein analyzing the rimlier further comprises:
segregating the rimlier into a normal high density rimlier and an outlier high density rimlier; and
analyzing the outlier high density rimlier to determine the data variables that indicate the downhole event.
4. A computer-implemented method as defined in claim 1 , wherein clustering the plurality of the outlier data further comprises forming a plurality of rimliers.
5. A computer-implemented method as defined in claim 4 , wherein modeling the downhole event further comprises modeling an energy efficiency of a downhole assembly.
6. A computer-implemented method as defined in claim 1 , further comprising determining whether the modeled downhole event can be avoided.
7. A computer-implemented method as defined in claim 1 , further comprising producing an alert signal corresponding to the modeled downhole event.
8. A computer-implemented method as defined in claim 1 , further comprising displaying the modeled downhole event in the form of a tree or earth model.
9. A computer-implemented method as defined in claim 4 , wherein analyzing the plurality of rimliers further comprises determining a pattern across the plurality of rimliers, wherein the downhole events are modeled based upon the determined patterns.
10. A system comprising processing circuitry to perform the method comprising:
extracting a dataset from a database, the dataset comprising normal wellbore data and outlier wellbore data;
clustering a plurality of the outlier data into a plurality of clusters;
segregating the plurality of clusters into a high density cluster and a low density cluster, wherein the high density clusters are utilized as a rimlier;
analyzing the rimlier to determine data variables within the rimlier that indicate a downhole event, wherein the analyzing comprises:
determining a Head Rimlier Factor as defined by:
E
h
E
r
=
Σ
-
p
h
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
;
and
determining a Tail Rimlier Factor as defined by:
Et
E
r
=
Σ
-
p
t
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
,
wherein E h is entropy of head data, p h is probability of the head data, E r is entropy of rimlier data, p r is probability of the rimlier data, E l is entropy of tail data, and p l is probability of the tail data,
wherein the Head Rimlier Factor and the Tail Rimlier Factor are utilized to determine the data variables indicating the downhole event; and
modeling the downhole event based upon the analysis of the rimlier,
wherein a wellbore is drilled, completed or stimulated in accordance to the modeled downhole events.
11. A system as defined in claim 10 , further comprising removing corrupted data from the extracted dataset.
12. A system as defined in claim 10 , wherein analyzing the rimlier further comprises:
segregating the rimlier into a normal high density rimlier and an outlier high density rimlier; and
analyzing the outlier high density rimlier to determine the data variables that indicate the downhole event.
13. A system as defined in claim 10 , wherein clustering the plurality of the outlier data further comprises forming, a plurality of rimliers.
14. A system as defined in claim 10 , wherein modeling the downhole event further comprises modeling an energy efficiency of a downhole assembly.
15. A system as defined in claim 10 , further comprising determining whether the modeled downhole event can be avoided.
16. A system as defined in claim 10 , further comprising producing an alert signal corresponding to the modeled downhole event.
17. A system as defined in claim 10 , further comprising displaying the modeled downhole event in the form of a tree or earth model.
18. A system as defined in claim 13 , wherein analyzing the plurality of rimliers further comprises determining a pattern across the plurality of rimliers, wherein the downhole events are modeled based upon the determined patterns.
19. A non-transitory computer-readable medium comprising instructions which, when executed by at least one processor, causes the processor to perform the method comprising:
extracting a dataset from a database, the dataset comprising normal wellbore data and outlier wellbore data;
clustering a plurality of the outlier data into a plurality of clusters;
segregating the plurality of clusters into a high density cluster and a low density cluster, wherein the high density clusters are utilized as a rimlier;
analyzing the rimlier to determine data variables within the rimlier that indicate a downhole event, wherein the analyzing comprises:
determining a Head Rimlier Factor as defined by:
E
h
E
r
=
Σ
-
p
h
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
;
and
determining a Tail Rimlier Factor as defined by:
Et
E
r
=
Σ
-
p
t
(
x
)
log
(
x
)
Σ
-
p
r
(
x
)
log
(
x
)
,
wherein E h is entropy of head data, p h is probability of the head data, E r is entropy of dinner data, p r is probability of the rimlier data, E t is entropy of tail data, and p t is probability of the tail data,
wherein the Head Rimlier Factor and the Tail Rimlier Factor are utilized to determine the data variables indicating the downhole event; and
modeling the downhole event based upon the analysis of the rimlier,
wherein a wellbore is drilled, completed or stimulated in accordance to the modeled downhole events.
20. A non-transitory computer-readable medium as defined in claim 19 , further comprising removing corrupted data from the extracted dataset.
21. A non-transitory computer-readable medium as defined in claim 19 , wherein analyzing the rimlier further comprises:
segregating the rimlier into a normal high density rimlier and an outlier high density rimlier; and
analyzing the outlier high density rimlier to determine the data variables that indicate the downhole event.
22. A non-transitory computer-readable medium as defined in claim 19 , wherein clustering the plurality of the outlier data further comprises forming a plurality of rimliers.
23. A non-transitory computer-readable medium as defined in claim 19 , wherein modeling the downhole event further comprises modeling an energy efficiency of a downhole assembly.
24. A non-transitory computer-readable medium as defined in claim 19 , further comprising determining whether the modeled downhole event can be avoided.
25. A non-transitory computer-readable medium as defined in claim 19 , further comprising producing an alert signal corresponding to the modeled downhole event.
26. A non-transitory computer-readable medium as defined in claim 19 , further comprising displaying the modeled downhole event in the form of a tree or earth model.
27. A non-transitory computer-readable medium as defined in claim 19 , wherein analyzing the plurality of rimliers further comprises determining a pattern across the plurality of rimliers, wherein the downhole events are modeled based upon the determined patterns.