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Geological characteristics, evaluation criteria and discovery significance of Paleogene Yingxiongling shale oil in Qaidam Basin, NW China
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LI Guoxin,ZHU Rukai,ZHANG Yongshu,CHEN Yan,CUI Jingwei,JIANG Yinghai,WU Kunyu,SHENG Jun,XIAN Chenggang,LIU He
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Table 1 Vertical well test data for shale oil in the upper Xiaganchaigou Formation in Yingyingling area, Qaidam Basin
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| Well | Oil layer formation | Mid-depth of perforation section/m | Porosity/
% | Oil saturation/
% | TOC/
% | Brittle mineral content/% | Measure | Oil pressure/MPa | Daily production/m3 | Testing result | | Oil | Gas | | Chai 902 | V | 3 196.0 | 7.9 | 65.2 | 0.92 | 71 | Fracturing | | 15.91 | Microscale | Oil layer | | IV | 2 801.5 | 11.1 | 64.2 | 0.80 | 62 | 24.0 | 32.53 | 2 582 | | Chai 903 | VI | 3 456.0 | 10.2 | 77.7 | 1.49 | 61 | | 15.12 | | | Chai 904 | V—VI | 3 506.0 | 6.5 | 61.1 | 0.87 | 55 | 19.0 | 23.94 | | | V | 3 251.0 | 7.9 | 58.7 | 0.85 | 68 | 33.0 | 8.96 | | | Chai 10 | VI | 3 493.5 | 6.7 | 76.5 | 0.94 | 62 | 25.0 | 13.38 | | | V | 3 243.0 | 5.7 | 62.5 | 0.85 | 80 | 13.0 | 31.87 | | | Chai 2-4 | IV | 2 830.0 | 8.9 | 74.5 | 1.29 | 55 | 12.0 | 18.09 | | | Shi 60 | IV | 3 450.0 | 8.2 | 41.3 | 1.25 | 67 | 20.5 | 26.21 | 604 |
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