Petroleum Science >2011,??Issue 1:??79-86 DOI: https://doi.org/10.1007/s12182-011-0118-0
Performance evaluation of oil displacing agents for primary-minor layers of the Daqing Oilfi eld Open?Access
文章信息
作者：Zhang Jian,Wang Shuxia,Lu Xiangguo and He Xianhua
作者單位：
School of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; Information Section, E&D Research Institute of Daqing Oilfi eld, Daqing, Heilongjiang 163712, China;School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;Information Section, E&D Research Institute of Daqing Oilfi eld, Daqing, Heilongjiang 163712, China
投稿時間：2010-06-24
引用方式：Zhang, J., Wang, S., Lu, X. et al. Pet. Sci. (2011) 8: 79. https://doi.org/10.1007/s12182-011-0118-0
文章摘要
A series of experiments were conducted to investigate the molecular coil dimension (Dh) and molecular configuration of partially hydrolyzed polyacrylamides (HPAM), surfactant/HPAM system,and a living polymer. Compatibility between the polymer coils and the porous media was evaluated by instrumental analysis and laboratory simulation methods. Meanwhile, the performance of chemical flooding was investigated. Results indicated that the Dh decreased with an increase in water salinity and increased with an increase in polymer concentration. In aqueous solution, the polymer presented threedimensional reticular configuration and exhibited a fractal structure characterized by self-similarity. The polymer in the surfactant/HPAM system was mainly in the form of “surfactant-polymer” complex compound and the living polymer had an irregular “flaky-reticular” configuration which resulted in relatively poor compatibility between the molecular coils and the porous media. The type of oil displacing agent and its slug size influenced the incremental oil recovery. For the same oil displacing agent, a larger slug size would lead to a better chemical flooding response. Given the final recovery efficiency and economic benefits, high-concentration polymer flooding was selected as the optimimal enhanced oil recovery (EOR) technique and the incremental recovery effi ciency was forecast to be 20%.
關鍵詞
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Primary-minor layers, molecular coil dimension, molecular confi guration, compatibility