Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin
The requirements for the accurate characterization of shoal sediments have increased in view of the fact that strata are eroded due to uplift and it is difficult to calculate the real thickness of granular shoal. To solve this problem, with the shoal-to-strata ratio, the type and distribution range...
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MDPI AG
2022-06-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/6/825 |
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| author | Xiuquan Hu Hong Liu Xiucheng Tan Chenjing Xiao Qian Tan Jianghan Li Chi Yi |
| author_facet | Xiuquan Hu Hong Liu Xiucheng Tan Chenjing Xiao Qian Tan Jianghan Li Chi Yi |
| author_sort | Xiuquan Hu |
| collection | DOAJ |
| description | The requirements for the accurate characterization of shoal sediments have increased in view of the fact that strata are eroded due to uplift and it is difficult to calculate the real thickness of granular shoal. To solve this problem, with the shoal-to-strata ratio, the type and distribution range of carbonate rock shoal facies are described, and the characterization of sedimentary facies is subsequently presented. Taking the P<sub>2</sub>m<sup>2</sup>a in Eastern Sichuan as an example, the following conclusions were obtained. (1) The primary rock types of the shoal facies of the P<sub>2</sub>m<sup>2</sup>a are bioclastic limestone and micrite limestone. The logging facies of platform margin shoals, intra-platform high-energy shoals, intra-platform low-energy shoals, and sloping low-energy shoals are large funnel-type, small funnel-type, box-type, and finger-like, respectively. The platform margin shoals and intra-platform high-energy shoals are imbricate seismic facies, and the intra-platform low-energy shoals and sloping low-energy shoals are S-type progradation seismic facies and oblique progradation. (2) The shoal-to-strata ratio of platform margin shoals is the highest, followed by intra-platform high-energy shoals, intra-platform low-energy shoals, and sloping low-energy shoals. (3) Shoal facies deposits have a certain controlling effect on gas production, and platform margin shoals have greater exploration potential. (4) This example shows that in the areas where carbonate rock strata are eroded, compared with the method of characterizing the sedimentary facies of carbonate rock using the shoal thickness, the shoal-to-strata ratios are more accurate. (5) The planar distribution diagram of the shoal-to-strata ratio can be used as a supporting map for compiling sedimentary facies maps. This method is worth applying in related research fields. |
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| id | doaj.art-189b8a3a87994ba6ad739561bd616138 |
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| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T23:22:08Z |
| publishDate | 2022-06-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-189b8a3a87994ba6ad739561bd6161382023-11-23T17:23:32ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-06-0110682510.3390/jmse10060825Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan BasinXiuquan Hu0Hong Liu1Xiucheng Tan2Chenjing Xiao3Qian Tan4Jianghan Li5Chi Yi6School of Earth Science and Technology, Southwest Petroleum University, Chengdu 610091, ChinaSchool of Earth Science and Technology, Southwest Petroleum University, Chengdu 610091, ChinaSchool of Earth Science and Technology, Southwest Petroleum University, Chengdu 610091, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, ChinaThe requirements for the accurate characterization of shoal sediments have increased in view of the fact that strata are eroded due to uplift and it is difficult to calculate the real thickness of granular shoal. To solve this problem, with the shoal-to-strata ratio, the type and distribution range of carbonate rock shoal facies are described, and the characterization of sedimentary facies is subsequently presented. Taking the P<sub>2</sub>m<sup>2</sup>a in Eastern Sichuan as an example, the following conclusions were obtained. (1) The primary rock types of the shoal facies of the P<sub>2</sub>m<sup>2</sup>a are bioclastic limestone and micrite limestone. The logging facies of platform margin shoals, intra-platform high-energy shoals, intra-platform low-energy shoals, and sloping low-energy shoals are large funnel-type, small funnel-type, box-type, and finger-like, respectively. The platform margin shoals and intra-platform high-energy shoals are imbricate seismic facies, and the intra-platform low-energy shoals and sloping low-energy shoals are S-type progradation seismic facies and oblique progradation. (2) The shoal-to-strata ratio of platform margin shoals is the highest, followed by intra-platform high-energy shoals, intra-platform low-energy shoals, and sloping low-energy shoals. (3) Shoal facies deposits have a certain controlling effect on gas production, and platform margin shoals have greater exploration potential. (4) This example shows that in the areas where carbonate rock strata are eroded, compared with the method of characterizing the sedimentary facies of carbonate rock using the shoal thickness, the shoal-to-strata ratios are more accurate. (5) The planar distribution diagram of the shoal-to-strata ratio can be used as a supporting map for compiling sedimentary facies maps. This method is worth applying in related research fields.https://www.mdpi.com/2077-1312/10/6/825shoal-to-strata ratiocarbonate rock shoal faciesEastern Sichuan areacarbonate rock P<sub>2</sub>m<sup>2</sup>aplatform margin |
| spellingShingle | Xiuquan Hu Hong Liu Xiucheng Tan Chenjing Xiao Qian Tan Jianghan Li Chi Yi Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin Journal of Marine Science and Engineering shoal-to-strata ratio carbonate rock shoal facies Eastern Sichuan area carbonate rock P<sub>2</sub>m<sup>2</sup>a platform margin |
| title | Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin |
| title_full | Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin |
| title_fullStr | Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin |
| title_full_unstemmed | Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin |
| title_short | Shoal-to-Strata Ratio Technique and Its Use in Describing Carbonate Rock Sedimentary Facies in the Eastern Sichuan Basin |
| title_sort | shoal to strata ratio technique and its use in describing carbonate rock sedimentary facies in the eastern sichuan basin |
| topic | shoal-to-strata ratio carbonate rock shoal facies Eastern Sichuan area carbonate rock P<sub>2</sub>m<sup>2</sup>a platform margin |
| url | https://www.mdpi.com/2077-1312/10/6/825 |
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