Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin
The diagenesis and pore evolution process of tight sandstone reservoirs in the Upper Triassic Bagong Formation of the North Qiangtang Depression were studied by means of physical properties, casting thin slice, SEM, X-ray-diffraction and fluid inclusion temperature measurement. The compositional mat...
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| Format: | Article |
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Editorial Office of Petroleum Geology and Experiment
2020-01-01
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| Series: | Shiyou shiyan dizhi |
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| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202001060 |
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| author | Leli CHENG Senlin YIN Youli WAN Jian WANG Xinglei FENG Xueren LI Shengqiang ZENG |
| author_facet | Leli CHENG Senlin YIN Youli WAN Jian WANG Xinglei FENG Xueren LI Shengqiang ZENG |
| author_sort | Leli CHENG |
| collection | DOAJ |
| description | The diagenesis and pore evolution process of tight sandstone reservoirs in the Upper Triassic Bagong Formation of the North Qiangtang Depression were studied by means of physical properties, casting thin slice, SEM, X-ray-diffraction and fluid inclusion temperature measurement. The compositional maturity and structural maturity of the Bagong sandstones are moderately low. Their physical properties are extremely tight. The main diagenetic effects include compaction, cementation, dissolution and metasomatism. The cement components are mainly siliceous, clay minerals and carbonate minerals, and the dissolution component is feldspar. According to the comprehensive analysis of various characteristics, the shallow buried area near the uplift is in the middle diagenesis stage B, and the deep buried area inside the depression is in the late diagenetic stage. Under the premise of considering the apparent volume change and compaction of rock, a quantitative calculation of pore evolution of different diagenetic facies is carried out. The calculation results show that compaction is the primary cause of reservoir porosity reduction, followed by cementation, while dissolution and the formation of chlorite lining are beneficial to reservoir porosity. |
| first_indexed | 2024-03-07T15:44:59Z |
| format | Article |
| id | doaj.art-da61918b52a3406a93535fd11bacc853 |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T15:44:59Z |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-da61918b52a3406a93535fd11bacc8532024-03-05T04:45:22ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122020-01-01421606810.11781/sysydz202001060sysydz-42-1-60Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang BasinLeli CHENG0Senlin YIN1Youli WAN2Jian WANG3Xinglei FENG4Xueren LI5Shengqiang ZENG6Institute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434023, ChinaInstitute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434023, ChinaChengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, ChinaChengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, ChinaChengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, ChinaChengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, ChinaChengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, ChinaThe diagenesis and pore evolution process of tight sandstone reservoirs in the Upper Triassic Bagong Formation of the North Qiangtang Depression were studied by means of physical properties, casting thin slice, SEM, X-ray-diffraction and fluid inclusion temperature measurement. The compositional maturity and structural maturity of the Bagong sandstones are moderately low. Their physical properties are extremely tight. The main diagenetic effects include compaction, cementation, dissolution and metasomatism. The cement components are mainly siliceous, clay minerals and carbonate minerals, and the dissolution component is feldspar. According to the comprehensive analysis of various characteristics, the shallow buried area near the uplift is in the middle diagenesis stage B, and the deep buried area inside the depression is in the late diagenetic stage. Under the premise of considering the apparent volume change and compaction of rock, a quantitative calculation of pore evolution of different diagenetic facies is carried out. The calculation results show that compaction is the primary cause of reservoir porosity reduction, followed by cementation, while dissolution and the formation of chlorite lining are beneficial to reservoir porosity.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202001060tight sandstonediagenesispore evolutionbagong formationupper triassicnorth qiangtang depressionqiangtang basin |
| spellingShingle | Leli CHENG Senlin YIN Youli WAN Jian WANG Xinglei FENG Xueren LI Shengqiang ZENG Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin Shiyou shiyan dizhi tight sandstone diagenesis pore evolution bagong formation upper triassic north qiangtang depression qiangtang basin |
| title | Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin |
| title_full | Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin |
| title_fullStr | Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin |
| title_full_unstemmed | Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin |
| title_short | Diagenesis and pore evolution of tight sandstone reservoirs in Upper Triassic Bagong Formation, North Qiangtang Depression, Qiangtang Basin |
| title_sort | diagenesis and pore evolution of tight sandstone reservoirs in upper triassic bagong formation north qiangtang depression qiangtang basin |
| topic | tight sandstone diagenesis pore evolution bagong formation upper triassic north qiangtang depression qiangtang basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202001060 |
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