Geometrical presentation of fracture planes
Systems, methods, and software can be used to analyze microseismic data from a fracture treatment. In some aspects, fracture planes are identified based on microseismic event data from a fracture treatment of a subterranean zone. Each fracture plane is associated with a subset of the microseismic event data. Confidence level groups are identified from the fracture planes. Each confidence level group includes fracture planes that have an accuracy confidence value within a respective range. A graphical representation of the fracture planes is generated. The graphical representation includes a distinct plot for each confidence level group.
1. A computer-implemented method for analyzing microseismic data from a fracture treatment, the method comprising:
identifying a plurality of fracture planes based on microseismic event data associated with a fracture treatment of a subterranean zone, each fracture plane associated with a subset of the microseismic event data;
identifying a plurality of confidence level groups from the plurality of fracture planes, each confidence level group including a plurality of fracture planes that have an accuracy confidence value within a respective range; and
generating, by data processing apparatus, a graphical representation of the fracture planes, the graphical representation including a distinct plot for each confidence level group.
2. The method of claim 1 , wherein each confidence level group includes a plurality of fracture planes that have:
an accuracy confidence value within a respective range of values for accuracy confidence; and
another parameter value within a respective range of values for the other parameter.
3. The method of claim 2 , wherein the other parameter includes at least one of fracture volume, leak-off volume, fracture width, or fluid efficiency.
4. The method of claim 1 , further comprising calculating the accuracy confidence value for each of the plurality of fracture planes, wherein the accuracy confidence value for a fracture plane is calculated based on parameters of the subset of the microseismic event data associated with the fracture plane.
5. The method of claim 4 , wherein the parameters of the subset of the microseismic event data include at least one of:
each microseismic event's location measurement uncertainty;
each microseismic event's moment magnitude;
distance between each microseismic event and the fracture plane;
a number of microseismic events associated with the fracture plane; or
variation of a fracture plane orientation.
6. The method of claim 1 , wherein the plurality of confidence level groups includes at least two of:
a high confidence level group that includes fracture planes having accuracy confidence values in a highest range;
a low confidence level group that includes fracture planes having accuracy confidence values in a lowest range; or
a medium confidence level group that includes fracture planes having accuracy confidence values between the highest range and the lowest range.
7. The method of claim 1 , wherein the plurality of confidence level groups includes three confidence level groups.
8. The method of claim 1 , further comprising defining the respective range for each confidence level group based on user input.
9. The method of claim 1 , further comprising displaying the graphical representation on a display device, wherein the graphical representation is generated and displayed during application of the fracture treatment.
10. The method of claim 9 , further comprising updating the displayed graphical representation based on additional microseismic event data from the fracture treatment.
11. The method of claim 1 , wherein the distinct plot of each confidence level group includes:
a three-dimensional representation of the fracture planes in the confidence level group;
a three-dimensional representation of the microseismic events associated with the fracture planes in the confidence level group; and
an identification a confidence level associated with the confidence level group.
12. The method of claim 1 , further comprising displaying the graphical representation on a display device, wherein the graphical representation indicates associations between microseismic events and fracture planes.
13. A non-transitory computer-readable medium encoded with instructions that, when executed by data processing apparatus, perform operations comprising:
identifying a plurality of fracture planes based on microseismic event data associated with a fracture treatment of a subterranean zone, each fracture plane associated with a subset of the microseismic event data;
identifying a plurality of confidence level groups from the plurality of fracture planes, each confidence level group including a plurality of fracture planes that have an accuracy confidence value within a respective range; and
generating a graphical representation of the fracture planes, the graphical representation including a distinct plot for each confidence level group.
14. The computer-readable medium of claim 13 , wherein each confidence level group includes a plurality of fracture planes that have:
an accuracy confidence value within a respective range of values for accuracy confidence; and
another parameter value within a respective range of values for the other parameter.
15. The computer-readable medium of claim 13 , the operations further comprising calculating the accuracy confidence value for each of the plurality of fracture planes, wherein the accuracy confidence value for a fracture plane is calculated based on parameters of the subset of the microseismic event data associated with the fracture plane.
16. The computer-readable medium of claim 13 , wherein the plurality of confidence level groups includes at least two of:
a high confidence level group that includes fracture planes having accuracy confidence values in a highest range;
a low confidence level group that includes fracture planes having accuracy confidence values in a lowest range; or
a medium confidence level group that includes fracture planes having accuracy confidence values between the highest range and the lowest range.
17. The computer-readable medium of claim 13 , the operations further comprising displaying the graphical representation on a display device, wherein the graphical representation is generated and displayed during application of the fracture treatment.
18. The computer-readable medium of claim 13 , wherein the distinct plot of each confidence level group includes:
a three-dimensional representation of the fracture planes in the confidence level group;
a three-dimensional representation of the microseismic events associated with the fracture planes in the confidence level group; and
an identification a confidence level associated with the confidence level group.
19. A system comprising:
a computer-readable medium that stores microseismic event data associated with a fracture treatment of a subterranean zone; and
data processing apparatus operable to:
identify a plurality of fracture planes based on the microseismic event data, each fracture plane associated with a subset of the microseismic event data;
identify a plurality of confidence level groups from the plurality of fracture planes, each confidence level group including a plurality of fracture planes that have an accuracy confidence value within a respective range; and
generate a graphical representation of the fracture planes, the graphical representation including a distinct plot for each confidence level group.
20. The system of claim 19 , further comprising a display device operable to display the graphical representation of the fracture planes.
21. The system of claim 19 , wherein each confidence level group includes a plurality of fracture planes that have:
an accuracy confidence value within a respective range of values for accuracy confidence; and
another parameter value within a respective range of values for the other parameter.
22. The system of claim 19 , wherein the plurality of confidence level groups includes at least two of:
a high confidence level group that includes fracture planes having accuracy confidence values in a highest range;
a low confidence level group that includes fracture planes having accuracy confidence values in a lowest range; or
a medium confidence level group that includes fracture planes having accuracy confidence values between the highest range and the lowest range.
23. The system of claim 19 , wherein the distinct plot of each confidence level group includes:
a three-dimensional representation of the fracture planes in the confidence level group;
a three-dimensional representation of the microseismic events associated with the fracture planes in the confidence level group; and
an identification a confidence level associated with the confidence level group.