Progress and effects of ASP flooding

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[1] Zhu, Youyi
[2] Hou, Qingfeng
[3] Liu, Weidong
[4] Ma, Desheng
[5] Liao, Guangzhi
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| 1600年 / Society of Petroleum Engineers (SPE)卷 / 65期
关键词：
Alkali/surfactant/polymer (ASP) flooding is one of the main chemical-enhanced-oil-recovery techniques for increasing crude-oil recovery used by PetroChina. Field tests have been performed in China since 1994; including six pilot tests in sandstone and in conglomerate reservoirs and three industrial tests. Incremental oil recoveries of those tests were greater than 19-20%. Three factors were found to be responsible for successful ASP flooding. • Good performance of the oildisplacement agents • Good profile control and oildisplacement ability • Reasonable well pattern and well spacing Side effects included scaling and corrosion damage to the lifting system that shortened the average pumpchecking cycle; strong emulsification that resulted in many liquid-treatment problems; and greatly decreased liquid production;
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