Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield
To analyze the effect of various flow units in a channel sand body on remnant oil, we established a connection between various flow unit types and the remnant oil distribution. Using stratigraphic correlation and the characterization of sedimentary microfacies, we describe a single sand body, point...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/5707250 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832566262316662784 |
|---|---|
| author | Yue Zhang You-liang Ji Hui-jian Wen Shi-zhong Ma Dong-lai Bai Bin-chi Zhang Ben-kang Xing |
| author_facet | Yue Zhang You-liang Ji Hui-jian Wen Shi-zhong Ma Dong-lai Bai Bin-chi Zhang Ben-kang Xing |
| author_sort | Yue Zhang |
| collection | DOAJ |
| description | To analyze the effect of various flow units in a channel sand body on remnant oil, we established a connection between various flow unit types and the remnant oil distribution. Using stratigraphic correlation and the characterization of sedimentary microfacies, we describe a single sand body, point bar, and narrow channel located at the injection-production well pattern of well B2-60-FB271 in the Eastern transition zone of the Daqing Placanticline. Architecture models of the point bar and narrow channel are also established using a series of parameters from different measurement methods. Four types of flow units (strong-current limiting, medium-current limiting, weak-current limiting, and none-current limiting) in the point bar sand body were identified, whereas one type, unshielded unit, was identified in the narrow channel. Geological parameters, such as porosity, permeability, and pore-throat radius (r50), were optimized to quantitatively characterize these various flow units. Samples were obtained from well B2-60-FB271 and analyzed by the freeze-fluorescence thin section technique. According to the displacement degree, the microscopic remnant oil was divided into three types: (1) free-state remnant oil, (2) semi-free-state remnant oil, and (3) bound-state remnant oil. We found that the strong-current limiting flow unit in the point bar is the enrichment area of free-state microscopic remnant oil and that the medium-current limiting and weak-current limiting flow units also have relatively high free microscopic remnant oil. These constitute the remaining oil enrichment areas in the study area. |
| format | Article |
| id | doaj-art-1c86caad6018475086f0d17aa3055951 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-1c86caad6018475086f0d17aa30559512025-02-03T01:04:39ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/57072505707250Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing OilfieldYue Zhang0You-liang Ji1Hui-jian Wen2Shi-zhong Ma3Dong-lai Bai4Bin-chi Zhang5Ben-kang Xing6State Key Laboratory of Petroleum Resource & Prospecting, College of Geosciences, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Petroleum Resource & Prospecting, College of Geosciences, China University of Petroleum, Beijing 102249, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaState Key Laboratory of Petroleum Resource & Prospecting, College of Geosciences, China University of Petroleum, Beijing 102249, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing, 163318 Heilongjiang, ChinaTo analyze the effect of various flow units in a channel sand body on remnant oil, we established a connection between various flow unit types and the remnant oil distribution. Using stratigraphic correlation and the characterization of sedimentary microfacies, we describe a single sand body, point bar, and narrow channel located at the injection-production well pattern of well B2-60-FB271 in the Eastern transition zone of the Daqing Placanticline. Architecture models of the point bar and narrow channel are also established using a series of parameters from different measurement methods. Four types of flow units (strong-current limiting, medium-current limiting, weak-current limiting, and none-current limiting) in the point bar sand body were identified, whereas one type, unshielded unit, was identified in the narrow channel. Geological parameters, such as porosity, permeability, and pore-throat radius (r50), were optimized to quantitatively characterize these various flow units. Samples were obtained from well B2-60-FB271 and analyzed by the freeze-fluorescence thin section technique. According to the displacement degree, the microscopic remnant oil was divided into three types: (1) free-state remnant oil, (2) semi-free-state remnant oil, and (3) bound-state remnant oil. We found that the strong-current limiting flow unit in the point bar is the enrichment area of free-state microscopic remnant oil and that the medium-current limiting and weak-current limiting flow units also have relatively high free microscopic remnant oil. These constitute the remaining oil enrichment areas in the study area.http://dx.doi.org/10.1155/2020/5707250 |
| spellingShingle | Yue Zhang You-liang Ji Hui-jian Wen Shi-zhong Ma Dong-lai Bai Bin-chi Zhang Ben-kang Xing Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield Geofluids |
| title | Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield |
| title_full | Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield |
| title_fullStr | Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield |
| title_full_unstemmed | Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield |
| title_short | Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield |
| title_sort | flow unit model of channel sand body and its effect on remnant oil distribution a case study of pi formation in the eastern transition zone of daqing oilfield |
| url | http://dx.doi.org/10.1155/2020/5707250 |
| work_keys_str_mv | AT yuezhang flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT youliangji flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT huijianwen flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT shizhongma flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT donglaibai flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT binchizhang flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield AT benkangxing flowunitmodelofchannelsandbodyanditseffectonremnantoildistributionacasestudyofpiformationintheeasterntransitionzoneofdaqingoilfield |