Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin
Abstract With the continuous improvement of oil and gas exploration in the middle and shallow layers, the deep Paleogene in Raoyang sag has become an important exploration field of “increasing reserves and production” in North China. The recognition and control factors of deep effective reservoirs a...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-03-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13202-023-01622-5 |
| _version_ | 1797846084822761472 |
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| author | Chenyu Zhai Chuanbing Lv Renan Gao Fengqun Li Jun Xie Shanshan Yu Zhimin Zhang Yingshun Mou Hongmei Wang |
| author_facet | Chenyu Zhai Chuanbing Lv Renan Gao Fengqun Li Jun Xie Shanshan Yu Zhimin Zhang Yingshun Mou Hongmei Wang |
| author_sort | Chenyu Zhai |
| collection | DOAJ |
| description | Abstract With the continuous improvement of oil and gas exploration in the middle and shallow layers, the deep Paleogene in Raoyang sag has become an important exploration field of “increasing reserves and production” in North China. The recognition and control factors of deep effective reservoirs are unclear, which restricts the recognition effect of oil and gas exploration. The key to identify effective reservoirs is to determine the lower limit standard of reservoir physical properties. The single method for calculating the lower limit of physical properties has limitations. The lower limit of the effective reservoir physical properties of the Shahejie Formation in the Dawangzhuang area was obtained by comprehensively using physical property, well logging and oil test data. The data were analysed by oil testing method, metre oil production index test method and frequency curve intersection method. On this basis, combined with the cast thin-section observations, scanning electron microscopy and other test results, the comprehensive control of effective reservoir development of the Shahejie Formation in the Dawangzhuang area of the Raoyang sag was studied from various factors, such as formation pressure, sand body thickness and diagenesis. The results show that the lower limit of porosity was 9.73, 9.44 and 8.85% at depths of Es1, Es2 and Es3, respectively. The lower limit of permeability was 1.21 × 10–3, 1.18 × 10–3 and 0.59 × 10–3 μm2, respectively. Effective reservoirs are easier to form in areas with formation pressure coefficient greater than 1.2. Formation overpressure inhibits compaction and promotes dissolution. The proportion of effective reservoirs of sand bodies with thicknesses greater than 2 m can reach more than 75%. The influence of diagenesis on the reservoir is mainly manifested in compaction and cementation making the reservoir compact. The porosity reduction rate caused by compaction can reach 20–75%, while dissolution makes the reservoir form secondary pores. The average pore throat radius of secondary pores can reach 4 ~ 6.3 µm. This study makes use of the applicability of different methods, which is more instructive for predicting the effective reservoir of the Shahejie Formation in the study area. In addition, the research results provide a reference for the development mechanism of medium-deep clastic reservoirs. |
| first_indexed | 2024-04-09T17:49:13Z |
| format | Article |
| id | doaj.art-633767a9e3e94eb0aff73886324f1bb8 |
| institution | Directory Open Access Journal |
| issn | 2190-0558 2190-0566 |
| language | English |
| last_indexed | 2024-04-09T17:49:13Z |
| publishDate | 2023-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj.art-633767a9e3e94eb0aff73886324f1bb82023-04-16T11:07:31ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662023-03-011351283129810.1007/s13202-023-01622-5Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay BasinChenyu Zhai0Chuanbing Lv1Renan Gao2Fengqun Li3Jun Xie4Shanshan Yu5Zhimin Zhang6Yingshun Mou7Hongmei Wang8College of Earth Science and Engineering, Shandong University of Science and TechnologyNorth China Oilfield Company of PetroChinaNorth China Oilfield Company of PetroChinaThe Third Oil Production Plant of North China Oilfield Company of PetroChinaCollege of Earth Science and Engineering, Shandong University of Science and TechnologyThe Third Oil Production Plant of North China Oilfield Company of PetroChinaThe Third Oil Production Plant of North China Oilfield Company of PetroChinaThe Third Oil Production Plant of North China Oilfield Company of PetroChinaNorth China Oilfield Company of PetroChinaAbstract With the continuous improvement of oil and gas exploration in the middle and shallow layers, the deep Paleogene in Raoyang sag has become an important exploration field of “increasing reserves and production” in North China. The recognition and control factors of deep effective reservoirs are unclear, which restricts the recognition effect of oil and gas exploration. The key to identify effective reservoirs is to determine the lower limit standard of reservoir physical properties. The single method for calculating the lower limit of physical properties has limitations. The lower limit of the effective reservoir physical properties of the Shahejie Formation in the Dawangzhuang area was obtained by comprehensively using physical property, well logging and oil test data. The data were analysed by oil testing method, metre oil production index test method and frequency curve intersection method. On this basis, combined with the cast thin-section observations, scanning electron microscopy and other test results, the comprehensive control of effective reservoir development of the Shahejie Formation in the Dawangzhuang area of the Raoyang sag was studied from various factors, such as formation pressure, sand body thickness and diagenesis. The results show that the lower limit of porosity was 9.73, 9.44 and 8.85% at depths of Es1, Es2 and Es3, respectively. The lower limit of permeability was 1.21 × 10–3, 1.18 × 10–3 and 0.59 × 10–3 μm2, respectively. Effective reservoirs are easier to form in areas with formation pressure coefficient greater than 1.2. Formation overpressure inhibits compaction and promotes dissolution. The proportion of effective reservoirs of sand bodies with thicknesses greater than 2 m can reach more than 75%. The influence of diagenesis on the reservoir is mainly manifested in compaction and cementation making the reservoir compact. The porosity reduction rate caused by compaction can reach 20–75%, while dissolution makes the reservoir form secondary pores. The average pore throat radius of secondary pores can reach 4 ~ 6.3 µm. This study makes use of the applicability of different methods, which is more instructive for predicting the effective reservoir of the Shahejie Formation in the study area. In addition, the research results provide a reference for the development mechanism of medium-deep clastic reservoirs.https://doi.org/10.1007/s13202-023-01622-5DawangzhuangEffective reservoirControl factorsDiagenesis |
| spellingShingle | Chenyu Zhai Chuanbing Lv Renan Gao Fengqun Li Jun Xie Shanshan Yu Zhimin Zhang Yingshun Mou Hongmei Wang Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin Journal of Petroleum Exploration and Production Technology Dawangzhuang Effective reservoir Control factors Diagenesis |
| title | Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin |
| title_full | Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin |
| title_fullStr | Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin |
| title_full_unstemmed | Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin |
| title_short | Lower limit of effective reservoir physical properties and controlling factors of medium-deep clastic reservoirs: a case study of the Dawangzhuang area in Raoyang sag, Bohai Bay Basin |
| title_sort | lower limit of effective reservoir physical properties and controlling factors of medium deep clastic reservoirs a case study of the dawangzhuang area in raoyang sag bohai bay basin |
| topic | Dawangzhuang Effective reservoir Control factors Diagenesis |
| url | https://doi.org/10.1007/s13202-023-01622-5 |
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