The results of five alkaline-surfactant-polymer (ASP) flood pilot tests carried out in single oil-layer and small scale showed that the incremental oil recoveries by ASP over that of the water flooding are over 20% OOIP. In order to realize the industrializing of ASP flooding, an ASP flood field test started in Central Xing2 Area of Daqing oilfield, using the surfactant produced by Daqing oilfield. Based on the great experimental achievements, the chemicals in ASP system were decreased greatly by optimizing the formulation and the injection method. Compared with the small scale site test area, the surfactant, polymer and alkaline were decreased by 1/3, 2/5 and 1/6, respectively, the chemicals can save 147 million RMB. Although the chemicals were decreased, the pilot test results show that the oil recovery was increased by 18% OOIP using the ASP flooding over that of water flooding.

Keywords:
Upstream Oil & Gas, oil production, enhanced recovery, commercial test area, chemical flooding methods, concentration, liquid production, asp flooding, producer, surfactant
Subjects:
Improved and Enhanced Recovery, Waterflooding, Chemical flooding methods
Copyright 2008, Society of Petroleum Engineers
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