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Petroleum Science >2019, Issue 3: 606-618 DOI: https://doi.org/10.1007/s12182-019-0311-0

Study of the mechanisms of streamline-adjustment-assisted heterogeneous combination flooding for enhanced oil recovery for post-polymer-flooded reservoirs Open Access

文章信息

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作者：Qing-Jun Du, Guang-Ming Pan, Jian Hou, Lan-Lei Guo4, Rong-Rong Wang, Zhi-Zeng Xia and Kang Zhou

作者单位：

Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, Shandong, P. R. China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China,School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China; Bohai Petroleum Research Institution, Tianjin Branch of CNOOC Ltd, Tianjin 300452, P. R. China,Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, Shandong, P. R. China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China,Research Institute of Exploration and Development, Shengli Oilfield SINOPEC, Dongying 257061, Shandong, P. R. China,Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, Shandong, P. R. China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China,Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, Shandong, P. R. China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China and Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, Shandong, P. R. China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, P. R. China

投稿时间：2018-01-31

引用方式：Du, QJ., Pan, GM., Hou, J. et al. Pet. Sci. (2019) 16: 606. https://doi.org/10.1007/s12182-019-0311-0

文章摘要

Streamline-adjustment-assisted heterogeneous combination flooding is a new technology for enhanced oil recovery for postpolymer- flooded reservoirs. In this work, we first carried out a series of 2D visualization experiments for different chemical flooding scenarios after polymer flooding. Then, we explored the synergistic mechanisms of streamline-adjustment-assisted heterogeneous combination flooding for enhanced oil recovery and the contribution of each component. Test results show that for single heterogeneous combination flooding, the residual oil in the main streamline area after polymer flooding is ready to be driven, but it is difficult to be recovered in the non-main streamline area. Due to the effect of drainage and synergism, the streamline-adjustment-assisted heterogeneous combination flooding diverts the injected chemical agent from the main streamline area to the non-main streamline area, which consequently expands the active area of chemical flooding. Based on the results from the single-factor contribution of the quantitative analysis, the contribution of temporary plugging and profile control of branched preformed particle gels ranks in the first place and followed by the polymer profile control and the effect of streamline adjustment. On the contrary, the surfactant contributes the least to enhance the efficiency of oil displacement.

关键词

Plate sand-pack model, Heterogeneous combination flooding, Streamline adjustment, Polymer flooding, Displacement