Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin
The bauxite reservoir of Taiyuan formation in Longdong area of Ordos basin is a new type of oilfield exploration and development, and several exploration wells have obtained high production of industrial gas flow, which breaks the traditional understanding that the bauxite of Taiyuan formationin in...
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Editorial Office of Well Logging Technology
2023-08-01
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| Series: | Cejing jishu |
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| Online Access: | https://www.cnpcwlt.com/#/digest?ArticleID=5519 |
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| author | GUO Xiaokai SUN Xiaoping DI Shuhua HU Cong ZHANG Zewen LIU Die HU Ming |
| author_facet | GUO Xiaokai SUN Xiaoping DI Shuhua HU Cong ZHANG Zewen LIU Die HU Ming |
| author_sort | GUO Xiaokai |
| collection | DOAJ |
| description | The bauxite reservoir of Taiyuan formation in Longdong area of Ordos basin is a new type of oilfield exploration and development, and several exploration wells have obtained high production of industrial gas flow, which breaks the traditional understanding that the bauxite of Taiyuan formationin in Longdong area is the weathering crust of Lower Paleo Ordovician, and shows a good exploration prospect of the bauxite reservoir. However, the overall lithology of the Taiyuan formation in the Longdong area varies greatly, with diverse types of rock minerals and complex lithology, making it difficult to effectively identify bauxite rocks. Based on data such as X-ray diffraction whole rock mineral analysis and conventional logging, core calibration logging is used to clarify the logging response characteristics of five different lithologies in the Taiyuan formation. Conventional logging is used to form a fast identification method for aluminum bearing rocks based on acoustic time difference and natural gamma envelope area, as well as an automatic identification technology for lithologies based on Fisher discrimination. A calculation model for rock mineral content is established based on the results of whole rock analysis, forming a quantitative identification technology for mineral components in the entire profile, and finely characterizing the lithological profile characteristics of bauxite reservoirs. Comparing the lithology identified by different methods with the core data, it can be concluded that the accuracy of lithology identification is more than 95%, achieving good lithology identification results in bauxite reservoirs, providing technical support for the exploration and development of this type of gas reservoir. |
| format | Article |
| id | doaj-art-26bce6f6579b47959be36b2b1d0bdbb8 |
| institution | DOAJ |
| issn | 1004-1338 |
| language | zho |
| publishDate | 2023-08-01 |
| publisher | Editorial Office of Well Logging Technology |
| record_format | Article |
| series | Cejing jishu |
| spelling | doaj-art-26bce6f6579b47959be36b2b1d0bdbb82025-08-20T03:08:18ZzhoEditorial Office of Well Logging TechnologyCejing jishu1004-13382023-08-0147450250810.16489/j.issn.1004-1338.2023.04.0161004-1338(2023)04-0502-07Lithological Identification Method and Application of Bauxite Rocks in Ordos BasinGUO Xiaokai0SUN Xiaoping1DI Shuhua2HU Cong3ZHANG Zewen4LIU Die5HU Ming6Geological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaGas Field Development Division, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, ChinaGeological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaExploration Division, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, ChinaGeological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaResearch Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, ChinaTraining Center, China National Logging Corporation, Xi’an, Shaanxi 710077, ChinaThe bauxite reservoir of Taiyuan formation in Longdong area of Ordos basin is a new type of oilfield exploration and development, and several exploration wells have obtained high production of industrial gas flow, which breaks the traditional understanding that the bauxite of Taiyuan formationin in Longdong area is the weathering crust of Lower Paleo Ordovician, and shows a good exploration prospect of the bauxite reservoir. However, the overall lithology of the Taiyuan formation in the Longdong area varies greatly, with diverse types of rock minerals and complex lithology, making it difficult to effectively identify bauxite rocks. Based on data such as X-ray diffraction whole rock mineral analysis and conventional logging, core calibration logging is used to clarify the logging response characteristics of five different lithologies in the Taiyuan formation. Conventional logging is used to form a fast identification method for aluminum bearing rocks based on acoustic time difference and natural gamma envelope area, as well as an automatic identification technology for lithologies based on Fisher discrimination. A calculation model for rock mineral content is established based on the results of whole rock analysis, forming a quantitative identification technology for mineral components in the entire profile, and finely characterizing the lithological profile characteristics of bauxite reservoirs. Comparing the lithology identified by different methods with the core data, it can be concluded that the accuracy of lithology identification is more than 95%, achieving good lithology identification results in bauxite reservoirs, providing technical support for the exploration and development of this type of gas reservoir.https://www.cnpcwlt.com/#/digest?ArticleID=5519bauxite rockenvelope areafisher discriminationrock minerallithology identificationordos basin |
| spellingShingle | GUO Xiaokai SUN Xiaoping DI Shuhua HU Cong ZHANG Zewen LIU Die HU Ming Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin Cejing jishu bauxite rock envelope area fisher discrimination rock mineral lithology identification ordos basin |
| title | Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin |
| title_full | Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin |
| title_fullStr | Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin |
| title_full_unstemmed | Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin |
| title_short | Lithological Identification Method and Application of Bauxite Rocks in Ordos Basin |
| title_sort | lithological identification method and application of bauxite rocks in ordos basin |
| topic | bauxite rock envelope area fisher discrimination rock mineral lithology identification ordos basin |
| url | https://www.cnpcwlt.com/#/digest?ArticleID=5519 |
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