Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir
Horizontal wells have become a key technology for the economical and effective development of tight reservoirs. In production, water cut increases rapidly, and even waterflooding is prominent. The mechanism of water breakthrough and the analysis of the water plugging effect are still tricky problems...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472201383X |
| _version_ | 1797901929845620736 |
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| author | Yapu Zhang Xuewei Liu Dajian Li Lijing Chang Guozhong Liu Zhuoying Dou Haitao Hou Xinli Zhao |
| author_facet | Yapu Zhang Xuewei Liu Dajian Li Lijing Chang Guozhong Liu Zhuoying Dou Haitao Hou Xinli Zhao |
| author_sort | Yapu Zhang |
| collection | DOAJ |
| description | Horizontal wells have become a key technology for the economical and effective development of tight reservoirs. In production, water cut increases rapidly, and even waterflooding is prominent. The mechanism of water breakthrough and the analysis of the water plugging effect are still tricky problems worldwide. Based on the reservoir characteristics of the typical tight oil area in Changqing oilfield, a physical simulation method of water breakthrough and plugging effect of segmented fractured horizontal wells was established based on the parallel connection of double cores and large-scale physical simulation system, and the mechanism of water breakthrough and water plugging effect of horizontal wells were studied. The results show that natural fractures or dynamic fractures are the main factors affecting the characteristics of water breakthrough. The end and waist of staged fractured horizontal wells are the main parts of water breakthrough. Water breakthrough points gradually increase in production, showing multi-direction. The overall water cut decreases after the water-prone area is plugged. Specifically, in this study, water plugging was implemented when the water cut of the horizontal well rose to 91%, and the water cut of a breakthrough part was reduced to about 60% after plugging, which played a good role in controlling the overall water cut. Oil displacement efficiency increased from 32.5% before plugging to 36% after plugging, rising by 4.5 percent. In addition, the duration of oil production increase in horizontal well after water plugging is not long, mainly because of the formation of water injection dominant channel between the injection well and horizontal well fracture before plugging. At this time, the resistance primarily exists in the water-affected area, and the Jamin effect caused by imbibition is the main factor of resistance; then, the swept volume is difficult to expand. |
| first_indexed | 2024-04-10T09:09:45Z |
| format | Article |
| id | doaj.art-433e0be16b844777945c6215923ba833 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:09:45Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-433e0be16b844777945c6215923ba8332023-02-21T05:12:33ZengElsevierEnergy Reports2352-48472022-11-01896109617Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoirYapu Zhang0Xuewei Liu1Dajian Li2Lijing Chang3Guozhong Liu4Zhuoying Dou5Haitao Hou6Xinli Zhao7Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, Beijing 100083, ChinaOil and Gas Technology Institute of Changqing Oilfield Company, PetroChina, Xi’an 710021, ChinaOil and Gas Technology Institute of Changqing Oilfield Company, PetroChina, Xi’an 710021, ChinaResearch Institute of Petroleum Exploration & Development, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, Beijing 100083, ChinaCollege of Petroleum Engineering, Changzhou University, Changzhou 213164, China; Corresponding author at: College of Petroleum Engineering, Changzhou University, Changzhou 213164, China.Horizontal wells have become a key technology for the economical and effective development of tight reservoirs. In production, water cut increases rapidly, and even waterflooding is prominent. The mechanism of water breakthrough and the analysis of the water plugging effect are still tricky problems worldwide. Based on the reservoir characteristics of the typical tight oil area in Changqing oilfield, a physical simulation method of water breakthrough and plugging effect of segmented fractured horizontal wells was established based on the parallel connection of double cores and large-scale physical simulation system, and the mechanism of water breakthrough and water plugging effect of horizontal wells were studied. The results show that natural fractures or dynamic fractures are the main factors affecting the characteristics of water breakthrough. The end and waist of staged fractured horizontal wells are the main parts of water breakthrough. Water breakthrough points gradually increase in production, showing multi-direction. The overall water cut decreases after the water-prone area is plugged. Specifically, in this study, water plugging was implemented when the water cut of the horizontal well rose to 91%, and the water cut of a breakthrough part was reduced to about 60% after plugging, which played a good role in controlling the overall water cut. Oil displacement efficiency increased from 32.5% before plugging to 36% after plugging, rising by 4.5 percent. In addition, the duration of oil production increase in horizontal well after water plugging is not long, mainly because of the formation of water injection dominant channel between the injection well and horizontal well fracture before plugging. At this time, the resistance primarily exists in the water-affected area, and the Jamin effect caused by imbibition is the main factor of resistance; then, the swept volume is difficult to expand.http://www.sciencedirect.com/science/article/pii/S235248472201383XTight oilHorizontal wellsMechanism of water breakthroughPluggingPhysical simulation |
| spellingShingle | Yapu Zhang Xuewei Liu Dajian Li Lijing Chang Guozhong Liu Zhuoying Dou Haitao Hou Xinli Zhao Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir Energy Reports Tight oil Horizontal wells Mechanism of water breakthrough Plugging Physical simulation |
| title | Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| title_full | Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| title_fullStr | Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| title_full_unstemmed | Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| title_short | Physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| title_sort | physical simulation experiment method of water breakthrough mechanism and plugging effect of horizontal well in tight reservoir |
| topic | Tight oil Horizontal wells Mechanism of water breakthrough Plugging Physical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S235248472201383X |
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