Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin
The exploration direction and targets for the large-scale Middle Permian gas reservoirs in the Sichuan Basin are hot spots and challenges in current exploration researches. The exploration successes of large gas field of Cambrian Longwangmiao Formation in Gaoshiti-Moxi region, Central Sichuan Basin,...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2015-11-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854016000048 |
| _version_ | 1827264165551538176 |
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| author | Guoming Xu Gangping Xie Ke Long Xiaobo Song |
| author_facet | Guoming Xu Gangping Xie Ke Long Xiaobo Song |
| author_sort | Guoming Xu |
| collection | DOAJ |
| description | The exploration direction and targets for the large-scale Middle Permian gas reservoirs in the Sichuan Basin are hot spots and challenges in current exploration researches. The exploration successes of large gas field of Cambrian Longwangmiao Formation in Gaoshiti-Moxi region, Central Sichuan Basin, indicated that prospective sedimentary facies belt was the basis for the formation of large gas fields. In this paper, based on seismic data, outcrop data and drilling data, the tectonic framework and sedimentary features of the Middle Permian in the SW Sichuan Basin were comprehensively studied. The following conclusions were reached from the perspective of sedimentary facies control: (1) during the Middle Permian, this region was in shallow water gentle slope belts with high energy, where thick reef flat facies were deposited; (2) the basement was uplifted during Middle Permian, resulting in the unconformity weathering crust at the top of Maokou Formation due to erosion; the SW Sichuan Basin was located in the karst slope belt, where epigenic karstification was intense; and (3) reef flat deposits superimposed by karst weathering crust was favorable for the formation of large-scale reef flat karst reservoirs. Based on the combination of the resources conditions and hydrocarbon accumulation conditions in this region, it was pointed out that the Middle Permian has great potential of large-scale reef flat karst gas reservoir due to its advantageous geological conditions; the Middle Permian traps with good hydrocarbon accumulation conditions were developed in the Longmen Mountain front closed structural belt in the SW Sichuan Basin and Western Sichuan Basin depression slope belt, which are favorable targets for large-scale reef flat karst reservoirs. |
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| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2025-03-22T03:41:43Z |
| publishDate | 2015-11-01 |
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| series | Natural Gas Industry B |
| spelling | doaj.art-348790705a464af99b8c56144576e8582024-04-28T11:58:55ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402015-11-012541542010.1016/j.ngib.2015.09.017Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan BasinGuoming XuGangping XieKe LongXiaobo SongThe exploration direction and targets for the large-scale Middle Permian gas reservoirs in the Sichuan Basin are hot spots and challenges in current exploration researches. The exploration successes of large gas field of Cambrian Longwangmiao Formation in Gaoshiti-Moxi region, Central Sichuan Basin, indicated that prospective sedimentary facies belt was the basis for the formation of large gas fields. In this paper, based on seismic data, outcrop data and drilling data, the tectonic framework and sedimentary features of the Middle Permian in the SW Sichuan Basin were comprehensively studied. The following conclusions were reached from the perspective of sedimentary facies control: (1) during the Middle Permian, this region was in shallow water gentle slope belts with high energy, where thick reef flat facies were deposited; (2) the basement was uplifted during Middle Permian, resulting in the unconformity weathering crust at the top of Maokou Formation due to erosion; the SW Sichuan Basin was located in the karst slope belt, where epigenic karstification was intense; and (3) reef flat deposits superimposed by karst weathering crust was favorable for the formation of large-scale reef flat karst reservoirs. Based on the combination of the resources conditions and hydrocarbon accumulation conditions in this region, it was pointed out that the Middle Permian has great potential of large-scale reef flat karst gas reservoir due to its advantageous geological conditions; the Middle Permian traps with good hydrocarbon accumulation conditions were developed in the Longmen Mountain front closed structural belt in the SW Sichuan Basin and Western Sichuan Basin depression slope belt, which are favorable targets for large-scale reef flat karst reservoirs.http://www.sciencedirect.com/science/article/pii/S2352854016000048Sichuan BasinSouthwestMiddle PermianHigh energy shallow water gentle slopeReef flat faciesUnconformity karst weathering crustKarst slope beltKarst reservoirExploration target |
| spellingShingle | Guoming Xu Gangping Xie Ke Long Xiaobo Song Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin Natural Gas Industry B Sichuan Basin Southwest Middle Permian High energy shallow water gentle slope Reef flat facies Unconformity karst weathering crust Karst slope belt Karst reservoir Exploration target |
| title | Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin |
| title_full | Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin |
| title_fullStr | Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin |
| title_full_unstemmed | Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin |
| title_short | Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin |
| title_sort | sedimentary features and exploration targets of middle permian reservoirs in the sw sichuan basin |
| topic | Sichuan Basin Southwest Middle Permian High energy shallow water gentle slope Reef flat facies Unconformity karst weathering crust Karst slope belt Karst reservoir Exploration target |
| url | http://www.sciencedirect.com/science/article/pii/S2352854016000048 |
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