Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin
In recent years, the Fuxian area in the southeastern Ordos Basin has undergone significant exploration, with industrial gas flow tested in wells drilled into the Ordovician marine carbonates. Despite this, the gas accumulation patterns of this area are not fully understood, posing challenges for fur...
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KeAi Communications Co., Ltd.
2024-01-01
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| Series: | Energy Geoscience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666759223000719 |
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| author | Ning Gu Juntao Zhang Xiaohui Jin Fei Yang Lu Liu |
| author_facet | Ning Gu Juntao Zhang Xiaohui Jin Fei Yang Lu Liu |
| author_sort | Ning Gu |
| collection | DOAJ |
| description | In recent years, the Fuxian area in the southeastern Ordos Basin has undergone significant exploration, with industrial gas flow tested in wells drilled into the Ordovician marine carbonates. Despite this, the gas accumulation patterns of this area are not fully understood, posing challenges for further exploration. Our analysis of geological conditions indicates that the Ordovician Majiagou Formation in this area hosts two gas plays: one found in weathering crusts and the other found in interior of the formation. We investigated various typical gas reservoirs in the area, focusing on differentiating the geological conditions and factors controlling gas accumulation in the weathering-crust and interior gas reservoirs. The results suggest three primary gas accumulation patterns in the Majiagou Formation in the Fuxian area: (1) upper gas accumulation in weathering crusts, present in the high parts of landforms such as residual paleo-hills or buried paleo-platform (Pattern I); (2) the stereoscopic pattern with gas accumulation in both weathering crusts and strata interior, arising in high parts of landforms such as residual paleo-hills or buried paleo-platforms (Pattern II); (3) lower gas accumulation in strata interior, occurring in the upper reaches and on both sides of paleo-trenches (Pattern III). This study will serve as a geological basis for future exploration deployment in the Fuxian area. |
| first_indexed | 2024-03-08T11:53:11Z |
| format | Article |
| id | doaj.art-485636d64e684bc6b3b232ba7dd9b938 |
| institution | Directory Open Access Journal |
| issn | 2666-7592 |
| language | English |
| last_indexed | 2024-03-08T11:53:11Z |
| publishDate | 2024-01-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Energy Geoscience |
| spelling | doaj.art-485636d64e684bc6b3b232ba7dd9b9382024-01-24T05:22:09ZengKeAi Communications Co., Ltd.Energy Geoscience2666-75922024-01-0151100225Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos BasinNing Gu0Juntao Zhang1Xiaohui Jin2Fei Yang3Lu Liu4Petroleum Exploration and Production Research Institute, SINOPEC, Beijing, 102206, China; Corresponding author.Petroleum Exploration and Production Research Institute, SINOPEC, Beijing, 102206, ChinaPetroleum Exploration and Production Research Institute, SINOPEC, Beijing, 102206, ChinaHuabei Oil ＆ Gas Branch, SINOPEC, Zhengzhou, Henan, 450000, ChinaHuabei Oil ＆ Gas Branch, SINOPEC, Zhengzhou, Henan, 450000, ChinaIn recent years, the Fuxian area in the southeastern Ordos Basin has undergone significant exploration, with industrial gas flow tested in wells drilled into the Ordovician marine carbonates. Despite this, the gas accumulation patterns of this area are not fully understood, posing challenges for further exploration. Our analysis of geological conditions indicates that the Ordovician Majiagou Formation in this area hosts two gas plays: one found in weathering crusts and the other found in interior of the formation. We investigated various typical gas reservoirs in the area, focusing on differentiating the geological conditions and factors controlling gas accumulation in the weathering-crust and interior gas reservoirs. The results suggest three primary gas accumulation patterns in the Majiagou Formation in the Fuxian area: (1) upper gas accumulation in weathering crusts, present in the high parts of landforms such as residual paleo-hills or buried paleo-platform (Pattern I); (2) the stereoscopic pattern with gas accumulation in both weathering crusts and strata interior, arising in high parts of landforms such as residual paleo-hills or buried paleo-platforms (Pattern II); (3) lower gas accumulation in strata interior, occurring in the upper reaches and on both sides of paleo-trenches (Pattern III). This study will serve as a geological basis for future exploration deployment in the Fuxian area.http://www.sciencedirect.com/science/article/pii/S2666759223000719Gas accumulationOrdovicianWeathering crust playInterior playFuxian areaThe ordos basin |
| spellingShingle | Ning Gu Juntao Zhang Xiaohui Jin Fei Yang Lu Liu Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin Energy Geoscience Gas accumulation Ordovician Weathering crust play Interior play Fuxian area The ordos basin |
| title | Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin |
| title_full | Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin |
| title_fullStr | Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin |
| title_full_unstemmed | Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin |
| title_short | Ordovician reservoirs in Fuxian area: Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin |
| title_sort | ordovician reservoirs in fuxian area gas accumulation patterns and their implications for the exploration of lower paleozoic carbonates in the southern ordos basin |
| topic | Gas accumulation Ordovician Weathering crust play Interior play Fuxian area The ordos basin |
| url | http://www.sciencedirect.com/science/article/pii/S2666759223000719 |
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