A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties
The fracability of shale reservoirs is one of the key indicators used for evaluating whether or not the shale can be used as a “sweet spot zone.” It has been determined that the structural properties of rock have important influences on the evaluation of the fracability of reservoirs. In the current...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2019/2079458 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832562590525423616 |
|---|---|
| author | Haoyue Sui Wei Gao Ruilin Hu |
| author_facet | Haoyue Sui Wei Gao Ruilin Hu |
| author_sort | Haoyue Sui |
| collection | DOAJ |
| description | The fracability of shale reservoirs is one of the key indicators used for evaluating whether or not the shale can be used as a “sweet spot zone.” It has been determined that the structural properties of rock have important influences on the evaluation of the fracability of reservoirs. In the current study, five rock quality designation (RQD) calculation methods were compared and analyzed for the purpose of selecting an RQDI for characterizing rock structures. Focused on the lack of structural factors included in the previous fracability evaluation methods, a new model for fracability evaluation based on the combination of the brittleness index, structural index, and fracture toughness was constructed using a linear elastic fracture theory. The model showed that good fracability not only included higher brittleness but also required less energy to produce cracks. Meanwhile, good fracability also required more discontinuous structural planes. In the current study, a formation with a higher fracability index was considered to be a fractureable interval and a formation with a lower fracability index was a fracture barrier. Finally, the reservoir fracability index was modeled using the Xike 2 well in the north of Guizhou Province as a case study. Subsequently, a fracability logging evaluation method based on the fracability index model was determined, which will potentially provide a new technical tool for future fracturing optimization processes. |
| format | Article |
| id | doaj-art-344fdf3307764fcfa9d9d29e74292ccf |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-344fdf3307764fcfa9d9d29e74292ccf2025-02-03T01:22:14ZengWileyGeofluids1468-81151468-81232019-01-01201910.1155/2019/20794582079458A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural PropertiesHaoyue Sui0Wei Gao1Ruilin Hu2Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaThe fracability of shale reservoirs is one of the key indicators used for evaluating whether or not the shale can be used as a “sweet spot zone.” It has been determined that the structural properties of rock have important influences on the evaluation of the fracability of reservoirs. In the current study, five rock quality designation (RQD) calculation methods were compared and analyzed for the purpose of selecting an RQDI for characterizing rock structures. Focused on the lack of structural factors included in the previous fracability evaluation methods, a new model for fracability evaluation based on the combination of the brittleness index, structural index, and fracture toughness was constructed using a linear elastic fracture theory. The model showed that good fracability not only included higher brittleness but also required less energy to produce cracks. Meanwhile, good fracability also required more discontinuous structural planes. In the current study, a formation with a higher fracability index was considered to be a fractureable interval and a formation with a lower fracability index was a fracture barrier. Finally, the reservoir fracability index was modeled using the Xike 2 well in the north of Guizhou Province as a case study. Subsequently, a fracability logging evaluation method based on the fracability index model was determined, which will potentially provide a new technical tool for future fracturing optimization processes.http://dx.doi.org/10.1155/2019/2079458 |
| spellingShingle | Haoyue Sui Wei Gao Ruilin Hu A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties Geofluids |
| title | A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties |
| title_full | A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties |
| title_fullStr | A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties |
| title_full_unstemmed | A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties |
| title_short | A New Evaluation Method for the Fracability of a Shale Reservoir Based on the Structural Properties |
| title_sort | new evaluation method for the fracability of a shale reservoir based on the structural properties |
| url | http://dx.doi.org/10.1155/2019/2079458 |
| work_keys_str_mv | AT haoyuesui anewevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties AT weigao anewevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties AT ruilinhu anewevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties AT haoyuesui newevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties AT weigao newevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties AT ruilinhu newevaluationmethodforthefracabilityofashalereservoirbasedonthestructuralproperties |