A visible experiment on adoption of high-temperature gel for improving the development effect of steam flooding in heavy oil reservoirs

作者：Wu Zhengbin^*; Pang Zhanxi; Liu Huiqing; Wang Dawei; Wang Chunlei; Wang Changjiu; Ye Zilu; Chen Yinuo

来源：Acta Petrolei Sinica, 2015, 36(11): 1421-1426.

DOI：10.7623/syxb201511011

• 2-D visualizations
• Different pressures
• Fingering phenomena
• Heavy oil reservoirs
• High temperature
• Image acquisition systems
• Physical simulation
• Steamflooding

Aiming at severe steam channeling in the steam flooding of heavy oil reservoirs, 2D visible physical simulation equipment was used for studying the effect of high-temperature gel on improvement of steam flooding. An image acquisition system was adopted to compare the images prior and posterior to high-temperature gel injection. Meanwhile, the whole process of steam channeling in steam flooding for heavy oil development was tracked, as well as the sweep situation of steam flooding layer posterior to high-temperature gel injection. Accordingly, the micro-mechanism of high-temperature gel for improving steam flooding was also studied. Experimental results indicate that in the process of steam flooding for heavy oil, steam channels tend to form between the injection and production wells due to different pressure gradients. Steam results in obvious fingering phenomenon in oil layers, thus reducing the sweep range of steam, leading to a large amount of residual oil on both sides of steam channels. The gel solution firstly flows into the channeling path, and occupies large intra-particle pores. Gel has a good plugging performance on channels with high permeability. The following steam bypasses the mainstream channels for further residual oil flooding. Oil flooding results show that posterior to gel injection, the final sweep efficiency can reach 70.44%, and the ultimate oil flooding efficiency is 60.45%, higher than that of pure steam flooding by 22.35% and 15.17% respectively.

• 出版日期2015
• 单位中国石油大学（华东）