A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit
The fracture-control matrix unit (F-CMU) is a special body present in low-permeability fractured reservoirs that can be distinguished by a fracture system and a matrix system. The imbibition phenomenon of the F-CMU provides the possibility for secondary development of low-permeability fractured rese...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/7469584 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832555107913302016 |
|---|---|
| author | Qiang Liu Jianjun Liu Guihong Pei Zhengwen Zhu Yun Lei |
| author_facet | Qiang Liu Jianjun Liu Guihong Pei Zhengwen Zhu Yun Lei |
| author_sort | Qiang Liu |
| collection | DOAJ |
| description | The fracture-control matrix unit (F-CMU) is a special body present in low-permeability fractured reservoirs that can be distinguished by a fracture system and a matrix system. The imbibition phenomenon of the F-CMU provides the possibility for secondary development of low-permeability fractured reservoirs because of the driving force including capillary force and gravity. However, the F-CMU is difficult to obtain during the field core drilling, which has limited the development for laboratory dynamic imbibition tests. Therefore, a new F-CMU reconstruction method is proposed in this study. According to the geometry and parameters, combining laser engraving technology, the fracture system is designed and engraved. Then, the F-CMU is established using a three-dimensional (3D) printed material called polyvinyl alcohol (PVA) as fracture support material which has a faster dissolution rate and causes less damage to the core due to water being the solvent. Finally, the porosity, permeability, and wettability of the matrix system and the T2 spectra from nuclear magnetic resonance (NMR) before and after reconstruction are measured. In addition, numerical simulation calculation of F-CMU permeability is performed. The results show that the characteristic parameters of the matrix system hardly change, indicating low damage to the core. The reconstructed fracture system is found on the T2 spectra, and the fracture permeability is consistent by comparing with the experimental and numerical simulation results. The permeability of the fracture system is about 104 orders of magnitude of the matrix system, which is closer to real core and meets the requirements needed for dynamic permeability experiments. |
| format | Article |
| id | doaj-art-546bd9c0b7654f529031dc2062cb8fd2 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-546bd9c0b7654f529031dc2062cb8fd22025-02-03T05:49:30ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/74695847469584A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix UnitQiang Liu0Jianjun Liu1Guihong Pei2Zhengwen Zhu3Yun Lei4School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Architectural Economic and Engineering Management, Hubei Business College, Wuhan 430074, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaShenyang Research Institute, China Coal Technology & Engineering Group Corp., Fushun 113122, ChinaThe fracture-control matrix unit (F-CMU) is a special body present in low-permeability fractured reservoirs that can be distinguished by a fracture system and a matrix system. The imbibition phenomenon of the F-CMU provides the possibility for secondary development of low-permeability fractured reservoirs because of the driving force including capillary force and gravity. However, the F-CMU is difficult to obtain during the field core drilling, which has limited the development for laboratory dynamic imbibition tests. Therefore, a new F-CMU reconstruction method is proposed in this study. According to the geometry and parameters, combining laser engraving technology, the fracture system is designed and engraved. Then, the F-CMU is established using a three-dimensional (3D) printed material called polyvinyl alcohol (PVA) as fracture support material which has a faster dissolution rate and causes less damage to the core due to water being the solvent. Finally, the porosity, permeability, and wettability of the matrix system and the T2 spectra from nuclear magnetic resonance (NMR) before and after reconstruction are measured. In addition, numerical simulation calculation of F-CMU permeability is performed. The results show that the characteristic parameters of the matrix system hardly change, indicating low damage to the core. The reconstructed fracture system is found on the T2 spectra, and the fracture permeability is consistent by comparing with the experimental and numerical simulation results. The permeability of the fracture system is about 104 orders of magnitude of the matrix system, which is closer to real core and meets the requirements needed for dynamic permeability experiments.http://dx.doi.org/10.1155/2020/7469584 |
| spellingShingle | Qiang Liu Jianjun Liu Guihong Pei Zhengwen Zhu Yun Lei A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit Advances in Civil Engineering |
| title | A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit |
| title_full | A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit |
| title_fullStr | A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit |
| title_full_unstemmed | A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit |
| title_short | A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit |
| title_sort | new method for artificial core reconstruction of a fracture control matrix unit |
| url | http://dx.doi.org/10.1155/2020/7469584 |
| work_keys_str_mv | AT qiangliu anewmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT jianjunliu anewmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT guihongpei anewmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT zhengwenzhu anewmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT yunlei anewmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT qiangliu newmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT jianjunliu newmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT guihongpei newmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT zhengwenzhu newmethodforartificialcorereconstructionofafracturecontrolmatrixunit AT yunlei newmethodforartificialcorereconstructionofafracturecontrolmatrixunit |