Fractal characteristics of pore-throat structure and permeability estimation of tight sandstone reservoirs: A case study of Chang 7 of the Upper Triassic Yanchang Formation in Longdong area, Ordos Basin, China
文献类型：期刊论文
| 作者 | Guo, Ruiliang1,3; Xie, Qichao2,6; Qu, Xuefeng2,6; Chu, Meijuan2; Li, Shutong1; Ma, Dongxu5; Ma, Xiaofeng1,4 |
| 刊名 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 出版日期 | 2020 |
| 卷号 | 184页码:13 |
| 关键词 | Fractal dimension Tight sandstone reservoirs Yanchang Formation Permeability estimation Mercury intrusion capillary pressure |
| ISSN号 | 0920-4105 |
| DOI | 10.1016/j.petrol.2019.106555 |
| 英文摘要 | Permeability estimation and quantitative evaluation of pore microstructure have always been hotspots and difficulties in tight sandstone reservoirs research. Taking the fractal dimension as the breakthrough, 10 core samples of Chang 7 section in the Upper Triassic Yanchang Formation were collected from different wells in Longdong area of Ordos Basin. The fractal dimension was calculated by mercury intrusion capillary pressure curve which can be obtained from high pressure mercury injection experiment, and samples were divided into four groups as group I, II, III and IV according to the value of fractal dimension estimated. The observation of casting thin sections and field emission scanning electron microscope show that group I mainly has dissolved-intergranular pores and original intergranular pores, group II is mainly dissolved-intergranular pores, group III mainly has dissolved-intragranular pores, and group IV is mainly micropores in clay matrix. Meanwhile, there is a highly correlation between the fractal dimension and the reservoir physical properties. With the fractal dimension of tight sandstone samples approaching 3, the compaction and cementation show a gradual increase, while the pore sorting, physical parameters and percolation capacity display a gradual decrease. Through multiple regression analysis, a set of empirical equations based on the fractal dimension and different pore throat radius were constructed, in which the equation based on maximum permeability contribution radius has the highest correlation. It shows that micropore (0.1-0.2 mu m) contributes most to permeability in tight sandstone reservoir. 10 blind samples were included in regression analysis to improve the prediction accuracy of the new model. A total of 28 samples, including 8 referenced data, were used to verify the predictive accuracy of the new model. The new empirical equation can predict the permeability of tight sandstone relatively accurate. Thus, the fractal dimension can effectively predict the permeability and evaluate the quality of tight sandstone reservoirs. |
| WOS关键词 | CAPILLARY-PRESSURE ; OIL ; POROSITY ; MICROGEOMETRY ; EXPLORATION ; PARAMETERS ; INSIGHT ; IMPACT ; SHALES |
| 资助项目 | National Natural Science Foundation of China[41772142] ; National Natural Science Foundation of China[41802160] ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield[2016E-05] ; Lanzhou City University Doctoral Research Initiation Fund[LZCU-BS2018-12] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000501599800067 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Lanzhou City University Doctoral Research Initiation Fund ; Lanzhou City University Doctoral Research Initiation Fund ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Lanzhou City University Doctoral Research Initiation Fund ; Lanzhou City University Doctoral Research Initiation Fund ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Lanzhou City University Doctoral Research Initiation Fund ; Lanzhou City University Doctoral Research Initiation Fund ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Key Technological Research and Application Projects for Sustainable and Stable Production of 50 million tons in Changqing Oilfield ; Lanzhou City University Doctoral Research Initiation Fund ; Lanzhou City University Doctoral Research Initiation Fund |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95823]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Guo, Ruiliang; Ma, Xiaofeng |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China 2.PetroChina Changqing OilField Co, Xian 710018, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.China Univ Geosci, Key Lab Tecton & Petr Resources, Wuhan 430074, Hubei, Peoples R China 5.Lanzhou City Univ, Peili Petr Engn Coll, Lanzhou 730070, Gansu, Peoples R China 6.Natl Engn Lab Explorat & Dev Low Permeabil Oil &, Xian 710018, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Ruiliang,Xie, Qichao,Qu, Xuefeng,et al. Fractal characteristics of pore-throat structure and permeability estimation of tight sandstone reservoirs: A case study of Chang 7 of the Upper Triassic Yanchang Formation in Longdong area, Ordos Basin, China[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2020,184:13. |
| APA | Guo, Ruiliang.,Xie, Qichao.,Qu, Xuefeng.,Chu, Meijuan.,Li, Shutong.,...&Ma, Xiaofeng.(2020).Fractal characteristics of pore-throat structure and permeability estimation of tight sandstone reservoirs: A case study of Chang 7 of the Upper Triassic Yanchang Formation in Longdong area, Ordos Basin, China.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,184,13. |
| MLA | Guo, Ruiliang,et al."Fractal characteristics of pore-throat structure and permeability estimation of tight sandstone reservoirs: A case study of Chang 7 of the Upper Triassic Yanchang Formation in Longdong area, Ordos Basin, China".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 184(2020):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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