Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China
Tight limestone reservoirs in the Permian Taiyuan Formation of the Ordos Basin have garnered increasing attention in recent years, emerging as a pivotal domain in the quest for natural gas exploration. This research delves into the comprehensive investigation of petrology, reservoir space, reservoir...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2023-10-01
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| Series: | Journal of Natural Gas Geoscience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468256X23000548 |
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| author | Guodong Dong Xinshe Liu Liangliang Yin Xunxun Fu Jiayao Song Xiaohui Zhao Wenchao Pei |
| author_facet | Guodong Dong Xinshe Liu Liangliang Yin Xunxun Fu Jiayao Song Xiaohui Zhao Wenchao Pei |
| author_sort | Guodong Dong |
| collection | DOAJ |
| description | Tight limestone reservoirs in the Permian Taiyuan Formation of the Ordos Basin have garnered increasing attention in recent years, emerging as a pivotal domain in the quest for natural gas exploration. This research delves into the comprehensive investigation of petrology, reservoir space, reservoir physical properties, and microscopic characteristics through the examination of field outcrops, core observations, thin section identification, scanning electron microscopy, stable carbon and oxygen isotope analysis, and testing. The systematic analysis focused on elucidating the development characteristics of these reservoirs and identifying the controlling factors governing favorable reservoir conditions. Based on our research analysis, the specific rock types with the potential to serve as excellent reservoirs, includes bioclastic silty limestone, bioclastic micrite limestone, and algal-rich limestone. The predominant reservoir spaces within these formations were found to consist of dissolved pores, residual bioclastic cavity pores, intercrystalline pores, and microfractures. These reservoirs exhibit an average porosity of 2.1%, and an average permeability of 0.22 × 10−3 μm2, indicating their classification as low porosity and low permeability reservoirs. The formation of favorable reservoirs in the Taiyuan Formation limestone was determined to be influenced by many factors; notably, the favorable sedimentary microfacies associated with bioclastic shoals and bioherms provided the foundational material basis for the formation of reservoirs, influencing the type of reservoir space and its extensive planar distribution. Penecontemporaneous karstification, guided by high-frequency cycles, was favorable for the formation of dissolution holes, effectively improving reservoir performance and facilitating the development of thick limestone reservoirs. Furthermore, fractures were identified as crucial agents in improving the seepage capacity of these tight limestone reservoirs. Drawing from our research results, this study offers valuable guidance for the future exploration of limestone formations in the Taiyuan Formation in the Ordos Basin. Additionally, these findings hold considerable significance as a reference point for research and exploration endeavors focused on bioclastic limestone reservoirs in the North China Platform. |
| first_indexed | 2024-03-11T20:57:47Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2468-256X |
| language | English |
| last_indexed | 2024-03-11T20:57:47Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Natural Gas Geoscience |
| spelling | doaj.art-7fe3d58519a74c27a096c5960b12d62f2023-09-30T04:55:20ZengKeAi Communications Co., Ltd.Journal of Natural Gas Geoscience2468-256X2023-10-0185307317Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, ChinaGuodong Dong0Xinshe Liu1Liangliang Yin2Xunxun Fu3Jiayao Song4Xiaohui Zhao5Wenchao Pei6Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, China; Corresponding author. Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China.Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaExploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaExploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaExploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaExploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaExploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an, 710018, China; National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, 710018, ChinaTight limestone reservoirs in the Permian Taiyuan Formation of the Ordos Basin have garnered increasing attention in recent years, emerging as a pivotal domain in the quest for natural gas exploration. This research delves into the comprehensive investigation of petrology, reservoir space, reservoir physical properties, and microscopic characteristics through the examination of field outcrops, core observations, thin section identification, scanning electron microscopy, stable carbon and oxygen isotope analysis, and testing. The systematic analysis focused on elucidating the development characteristics of these reservoirs and identifying the controlling factors governing favorable reservoir conditions. Based on our research analysis, the specific rock types with the potential to serve as excellent reservoirs, includes bioclastic silty limestone, bioclastic micrite limestone, and algal-rich limestone. The predominant reservoir spaces within these formations were found to consist of dissolved pores, residual bioclastic cavity pores, intercrystalline pores, and microfractures. These reservoirs exhibit an average porosity of 2.1%, and an average permeability of 0.22 × 10−3 μm2, indicating their classification as low porosity and low permeability reservoirs. The formation of favorable reservoirs in the Taiyuan Formation limestone was determined to be influenced by many factors; notably, the favorable sedimentary microfacies associated with bioclastic shoals and bioherms provided the foundational material basis for the formation of reservoirs, influencing the type of reservoir space and its extensive planar distribution. Penecontemporaneous karstification, guided by high-frequency cycles, was favorable for the formation of dissolution holes, effectively improving reservoir performance and facilitating the development of thick limestone reservoirs. Furthermore, fractures were identified as crucial agents in improving the seepage capacity of these tight limestone reservoirs. Drawing from our research results, this study offers valuable guidance for the future exploration of limestone formations in the Taiyuan Formation in the Ordos Basin. Additionally, these findings hold considerable significance as a reference point for research and exploration endeavors focused on bioclastic limestone reservoirs in the North China Platform.http://www.sciencedirect.com/science/article/pii/S2468256X23000548Tight limestoneReservoir characteristicsMain controlling factorsTaiyuan FormationOrdos Basin |
| spellingShingle | Guodong Dong Xinshe Liu Liangliang Yin Xunxun Fu Jiayao Song Xiaohui Zhao Wenchao Pei Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China Journal of Natural Gas Geoscience Tight limestone Reservoir characteristics Main controlling factors Taiyuan Formation Ordos Basin |
| title | Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China |
| title_full | Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China |
| title_fullStr | Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China |
| title_full_unstemmed | Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China |
| title_short | Development characteristics and genetic analysis of dense limestone reservoirs in the Taiyuan Formation of the Ordos Basin, China |
| title_sort | development characteristics and genetic analysis of dense limestone reservoirs in the taiyuan formation of the ordos basin china |
| topic | Tight limestone Reservoir characteristics Main controlling factors Taiyuan Formation Ordos Basin |
| url | http://www.sciencedirect.com/science/article/pii/S2468256X23000548 |
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