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- Title
油水三次运移速度探究.
- Authors
张荣达; 杨光辉; 宋志超; 秦健飞; 马 康; 李俊键; 姜汉桥
- Abstract
The production practice has proved that several years after the shut-in of many abandoned wells, the formation fluid under the action of gravity and capillary force will cause the remaining oil to accumulate and form the enrichment region. Thus, the wells once shut down can resume production, which has been verified in the production practice of Shengli oilfield in China. In order to explore the accumulation law and accumulation rate of oil-water in three times of migration, three sets of sand filling experiments were designed in this paper using experiments and numerical simulation. The tertiary migration velocity was found to be about 3 m /a. By theoretical analysis and numerical simulation, the experimental model is simulated, and the variation law of oil-water migration velocity and water saturation in different parts of the model with time is explored. It was found that the larger the formation angle, the smaller the oil viscosity, and the better the oil and water migration effect. Through numerical simulation, it is found that the saturation field in the reservoir will be redistributed with time, and the tertiary oil-water migration velocity will be stabilized at 3 m /a. The oil-water migration velocity obtained by model simulation is consistent with the experimental observation results. Moreover, it is found through the simulation that the areas with high oil saturation and high water saturation are not conducive to oil-water displacement. The migration velocity will be the fastest in areas with relatively balanced saturation. Therefore, under different regional conditions, the tertiary migration velocity of oil-water is affected by many factors. The study results provide reference for the evaluation of the tertiary migration velocity of oil and water under different conditions.
- Publication
Natural Gas & Oil, 2020, Vol 38, Issue 5, p71
- ISSN
1006-5539
- Publication type
Article
- DOI
10.3969/j.issn.1006-5539.2020.05.012