Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China
Although the Ordovician petroleum exploration in the Sichuan Basin has been developed slowly for a long time, deepening the research of reservoir characteristics and genesis is still a robust way to accelerate it. This paper characterizes the Ordovician reservoirs in the central part of Sichuan Basi...
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Frontiers Media S.A.
2023-01-01
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Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.984491/full |
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author | Li Zhou Hao Tang Yading Li Ruiqing Tao Wei Yan Tao Ma Shuang Pan Yi Du Zhenbo Tan Xuefei Yang |
author_facet | Li Zhou Hao Tang Yading Li Ruiqing Tao Wei Yan Tao Ma Shuang Pan Yi Du Zhenbo Tan Xuefei Yang |
author_sort | Li Zhou |
collection | DOAJ |
description | Although the Ordovician petroleum exploration in the Sichuan Basin has been developed slowly for a long time, deepening the research of reservoir characteristics and genesis is still a robust way to accelerate it. This paper characterizes the Ordovician reservoirs in the central part of Sichuan Basin and analyzes their genesis based on cores, thin sections, well logs and drilling data. The results show the reservoirs concentrated in the Lower Ordovician Tongzi Formation, which consist mainly of sandy oolitic dolostones, bioclastic dolostones, fine crystalline dolostones, sandy dolomitized conglomerates, sandy dolostones and dolomite sandstone. The porosity types include interparticle pore, intraparticle pore, moldic pore, fracture and vug. Throats are mostly necked and flaky. The Tongzi Formation reservoirs mainly experienced three types of diageneses, including compaction, cementation and dissolution. The reservoir development was controlled by multiple factors of deposition, diagenesis and tectonics; the shoal facies is the basis, the penecontemporaneous dissolution and dolomitization are the main driving force, and the burial dissolution is the aid. The study can provide reference for deepening the Ordovician petroleum exploration and development in the Sichuan Basin. |
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language | English |
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publishDate | 2023-01-01 |
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spelling | doaj.art-f623ef8a65624b98b6808a76e3a8885e2023-01-11T04:26:50ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.984491984491Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, ChinaLi Zhou0Hao Tang1Yading Li2Ruiqing Tao3Wei Yan4Tao Ma5Shuang Pan6Yi Du7Zhenbo Tan8Xuefei Yang9Division of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaDivision of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaSichuan Shale Gas Exploration and Development Co. LTD, Chengdu, ChinaThe 2nd Oil Production Plant, Northwest Oilfield Branch of Sinopec, Luntai, ChinaResearch Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaDivision of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaDivision of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaDivision of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaThe 3rd Oil Production Plant, PetroChina Qinghai Oil Field Company, Dunhuang, ChinaDivision of Key Laboratory of Carbonate Reservoirs of CNPC, Southwest Petroleum University, Chengdu, ChinaAlthough the Ordovician petroleum exploration in the Sichuan Basin has been developed slowly for a long time, deepening the research of reservoir characteristics and genesis is still a robust way to accelerate it. This paper characterizes the Ordovician reservoirs in the central part of Sichuan Basin and analyzes their genesis based on cores, thin sections, well logs and drilling data. The results show the reservoirs concentrated in the Lower Ordovician Tongzi Formation, which consist mainly of sandy oolitic dolostones, bioclastic dolostones, fine crystalline dolostones, sandy dolomitized conglomerates, sandy dolostones and dolomite sandstone. The porosity types include interparticle pore, intraparticle pore, moldic pore, fracture and vug. Throats are mostly necked and flaky. The Tongzi Formation reservoirs mainly experienced three types of diageneses, including compaction, cementation and dissolution. The reservoir development was controlled by multiple factors of deposition, diagenesis and tectonics; the shoal facies is the basis, the penecontemporaneous dissolution and dolomitization are the main driving force, and the burial dissolution is the aid. The study can provide reference for deepening the Ordovician petroleum exploration and development in the Sichuan Basin.https://www.frontiersin.org/articles/10.3389/feart.2022.984491/fullreservoir characteristicsdiagenesisOrdovicianSichuan Basinreservoir origin |
spellingShingle | Li Zhou Hao Tang Yading Li Ruiqing Tao Wei Yan Tao Ma Shuang Pan Yi Du Zhenbo Tan Xuefei Yang Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China Frontiers in Earth Science reservoir characteristics diagenesis Ordovician Sichuan Basin reservoir origin |
title | Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China |
title_full | Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China |
title_fullStr | Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China |
title_full_unstemmed | Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China |
title_short | Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China |
title_sort | reservoir characteristics and genesis of the lower ordovician tongzi formation in central sichuan basin china |
topic | reservoir characteristics diagenesis Ordovician Sichuan Basin reservoir origin |
url | https://www.frontiersin.org/articles/10.3389/feart.2022.984491/full |
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