التفاصيل البيبلوغرافية
| العنوان: |
页岩 (致密) 油藏注 CO2吞吐作用距离实验. (Chinese) |
| Alternate Title: |
Experiment on CO2 injection huff⁃and⁃puff distance in shale (tight) oil reservoirs. (English) |
| المؤلفون: |
黄千慧, 李海波, 杨正明, 邢济麟, 陈 波, 李 杰, 薛 伟, 姚兰兰, 杜 猛, 孟 焕 |
| المصدر: |
Petroleum Geology & Oilfield Development in Daqing; Dec2024, Vol. 43 Issue 6, p128-135, 8p |
| مصطلحات موضوعية: |
NUCLEAR magnetic resonance, PETROLEUM reservoirs, SHALE, UNITS of time, PERMEABILITY |
| Abstract (English): |
In order to clarify development effect of CO2 injection huff-and-puff in shale (tight) oil reservoirs, laboratory CO2 huff-and-puff experiments are carried out based on 14 shale (tight) samples from Songliao Basin and Ordos Basin. Combined with nuclear magnetic resonance technology, T2 spectra of samples at different stages of huff-and-puff are obtained. T2 spectra variation of oil within the cores in different conditions is analyzed to obtain relationship between CO2 huff-and-puff recovery degree and huff-and-puff time, determine time required for unit distance of CO2 injection huff-and-puff in the cores, and calculate effective distance of CO2 injection huff-and-puff in reservoirs combined with field application. The results show that time required for unit distance of CO2 injection huff-and-puff significantly increases with permeability decrease. Time required for huff-and-puff unit distance in cores of Ordos Basin shows logarithmic relationship with permeability time. Required time for average huff-and-puff distance of 1.19 cm in 6 sandwiched cores is 1.80 h. For pure shale cores of Block A in Songliao Basin, average huff-and-puff distance is 1.250 cm and required time is 39.00 h, which is much higher than 2.06 h for tight oil cores of Block A. Average huff-and-puff distance of pure shale cores of Block B in Songliao Basin is 1.24 cm and required time is 1.76 h. For Ordos Basin shale reservoirs, effective distance of CO2 injection huff-and-puff development for a month reaches 6.55 m, much higher than 0.50 m for pure shale reservoirs in Songliao Basin. The research provides reference evidence for reservoir property evaluation and development effect of tight reservoirs. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
为了明确页岩 (致密) 油藏注 CO2吞吐开发效果, 基于松辽盆地、鄂尔多斯盆地的 14 块页岩 (致密) 岩样开展了室 内 CO2吞吐实验, 结合核磁共振技术, 获得岩样吞吐不同阶段的 T2谱; 通过分析不同状态下岩心内油的 T2谱变化, 获得 CO2 吞吐采出程度与吞吐时间的关系, 确定岩心注 CO2单位吞吐距离所需时间, 并结合现场计算储层注 CO2吞吐的有效作用距 离。结果表明: 随渗透率的降低, 注 CO2吞吐单位距离所需时间有明显增大的趋势; 鄂尔多斯盆地岩心单位吞吐距离所需 时间与渗透率时间呈对数关系, 6 块夹层型岩心平均吞吐作用距离 1.19 cm 所需时间为 1.80 h; 松辽盆地 A 区块纯页岩型岩 心平均吞吐距离为 1.250 cm, 所需时间为 39.00 h, 远高于松辽盆地 A区块致密油岩心的 2.06 h; 松辽盆地 B区块纯页岩型页 岩岩心平均吞吐距离为 1.24 cm, 所需时间为 1.76 h; 鄂尔多斯盆地页岩油藏在注 CO2吞吐开发一个月内, 有效作用距离最 高可达6.55 m, 远高于松辽盆地纯页岩型油藏的0.50 m。研究成果为致密油藏储层物性评价及开发效果改善提供参考依据。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |