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中文摘要：
针对蒸汽驱恒定式注汽速度驱油效果差的现状，提出了整个蒸汽驱过程中采用振荡式注汽速度的驱油方式，具体分为振幅变化恒定的振荡式注汽速度和振幅变化随机的振荡式注汽速度两种情况开展研究。为了确定每个振荡周期最优的注汽速度，依据质量守恒和能量守恒原理，以蒸汽驱累积油汽比为评价目标，建立注汽速度评价模型，并且引入粒子群优化算法，优选出每个周期最优的振荡式注汽速度。为了评价振荡式注汽速度对蒸汽驱开采效果的影响，以辽河油田齐40块为例进行了试算。结果表明，振荡式注汽速度优于恒定式注汽速度，可提高累积油汽比23．50％。振幅变化随机的振荡式注汽速度优于振幅变化恒定的振荡式注汽速度．可提高累积油汽比8．98％。
英文摘要：
Aiming at the poor oil displacement efficiency of steam flooding with a constant steam injection rate, oscillatory steam injection rate is put forward for the whole process of steam flooding. The oscillatory steam injection rate can be di- vided into two types. One is constant amplitude change type and the other is random amplitude change type. In order to determine the optimal steam injection rate for each cycle, a steam injection rate evaluation model with cumulative oil steam ratio as the target of appraisal is built based on the principles of mass conservation and energy conservation. Parti- cle swarm optimization algorithm is used to optimize the optimal oscillatory steam injection rate for each cycle. Qi-40 Block in Liaohe oilfield was taken as case to evaluate the influences of oscillatory steam injection rate on the performance of steam flooding. Results show that the oil displacement efficiency of the oscillatory steam injection rate is better than that of the constant steam injection rate, and the cumulative oil steam ratio can be increased by 23.50 %. In addition, the oscillatory steam injection rate with random amplitude change is better than that with constant amplitude change, and the cumulative oil steam ratio of the former is 8.98 % higher than that of the latter.
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