Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin
Subtle characterization of pore throat structure and permeability prediction of tight sandstone reservoir are the key for quality reservoir evaluation and development. Taking Jurassic Shaximiao Formation in central Sichuan Basin as an example, the pore throat structure is statically characterized by...
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Editorial Office of Petroleum Geology and Experiment
2024-01-01
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| Series: | Shiyou shiyan dizhi |
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| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401202 |
| _version_ | 1797279037646700544 |
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| author | Shaoyun CHEN Yongqiang YANG Longwei QIU Xiaojuan WANG Baoliang YANG HABILAXIM Erejep |
| author_facet | Shaoyun CHEN Yongqiang YANG Longwei QIU Xiaojuan WANG Baoliang YANG HABILAXIM Erejep |
| author_sort | Shaoyun CHEN |
| collection | DOAJ |
| description | Subtle characterization of pore throat structure and permeability prediction of tight sandstone reservoir are the key for quality reservoir evaluation and development. Taking Jurassic Shaximiao Formation in central Sichuan Basin as an example, the pore throat structure is statically characterized by HPMI and fractal theory. The relations among pore throat structure, fractal dimension and reservoir physical property are discussed, the contribution of pore throat structure to permeability is analyzed, and a permeability prediction model is established. The samples of Shaximiao Formation can be divided into four types: type Ⅰ samples have low displacement pressure, favorable physical properties and good pore connectivity; the average fractal dimension is 2.11, the pores are mainly macropores and mesopores with radius >0.1 μm, and the pore throat with radius >1 μm contributes more than 90% of the permeability. As for type Ⅱ samples, the displacement pressure are 0.4-1.0 MPa, the average porosity and permeability are 9.72% and 0.375×10-3 μm2, respectively, and the fractal dimension is 2.20; the mesopore content increases and mesopores contribute most of the permeability. The displacement pressure and fractal dimension of type Ⅲ and Ⅳ samples are significantly higher than those of type Ⅰ and Ⅱ samples, and the low porosity and lack of macropore lead to low permeability. The macropores and mesopores with radius > 0.1 μm contribute more than 98% of the permeability of Shaximiao Formation. Fractal dimension is a good indicator of pore throat structure. Fractal dimension is significantly negatively correlated with pore throat radius, maximum mercury saturation and permeability, and is positively correlated with displacement pressure and relative separation coefficient of pore throat. There is a strong correlation between fractal dimension and pore throat composition, and a permeability quantitative prediction model based on fractal dimension, porosity and maximum pore throat radius is established. |
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| id | doaj.art-2f96857d6f90498e9412b29ab7b0131e |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T16:17:38Z |
| publishDate | 2024-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
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| series | Shiyou shiyan dizhi |
| spelling | doaj.art-2f96857d6f90498e9412b29ab7b0131e2024-03-04T08:32:59ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-01-0146120221410.11781/sysydz202401202sysydz-46-1-202Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan BasinShaoyun CHEN0Yongqiang YANG1Longwei QIU2Xiaojuan WANG3Baoliang YANG4HABILAXIM Erejep5School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaResearch Institute of Exploration and Development, PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610041, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaSubtle characterization of pore throat structure and permeability prediction of tight sandstone reservoir are the key for quality reservoir evaluation and development. Taking Jurassic Shaximiao Formation in central Sichuan Basin as an example, the pore throat structure is statically characterized by HPMI and fractal theory. The relations among pore throat structure, fractal dimension and reservoir physical property are discussed, the contribution of pore throat structure to permeability is analyzed, and a permeability prediction model is established. The samples of Shaximiao Formation can be divided into four types: type Ⅰ samples have low displacement pressure, favorable physical properties and good pore connectivity; the average fractal dimension is 2.11, the pores are mainly macropores and mesopores with radius >0.1 μm, and the pore throat with radius >1 μm contributes more than 90% of the permeability. As for type Ⅱ samples, the displacement pressure are 0.4-1.0 MPa, the average porosity and permeability are 9.72% and 0.375×10-3 μm2, respectively, and the fractal dimension is 2.20; the mesopore content increases and mesopores contribute most of the permeability. The displacement pressure and fractal dimension of type Ⅲ and Ⅳ samples are significantly higher than those of type Ⅰ and Ⅱ samples, and the low porosity and lack of macropore lead to low permeability. The macropores and mesopores with radius > 0.1 μm contribute more than 98% of the permeability of Shaximiao Formation. Fractal dimension is a good indicator of pore throat structure. Fractal dimension is significantly negatively correlated with pore throat radius, maximum mercury saturation and permeability, and is positively correlated with displacement pressure and relative separation coefficient of pore throat. There is a strong correlation between fractal dimension and pore throat composition, and a permeability quantitative prediction model based on fractal dimension, porosity and maximum pore throat radius is established.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401202fractal dimensionpore throat structurepermeabilitytight sandstoneshaximiao formationjurassiccentral sichuan basin |
| spellingShingle | Shaoyun CHEN Yongqiang YANG Longwei QIU Xiaojuan WANG Baoliang YANG HABILAXIM Erejep Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin Shiyou shiyan dizhi fractal dimension pore throat structure permeability tight sandstone shaximiao formation jurassic central sichuan basin |
| title | Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin |
| title_full | Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin |
| title_fullStr | Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin |
| title_full_unstemmed | Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin |
| title_short | Pore throat structure analysis and permeability prediction method of tight sandstone: a case study of Jurassic Shaximiao Formation in central Sichuan Basin |
| title_sort | pore throat structure analysis and permeability prediction method of tight sandstone a case study of jurassic shaximiao formation in central sichuan basin |
| topic | fractal dimension pore throat structure permeability tight sandstone shaximiao formation jurassic central sichuan basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401202 |
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