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首页> 外文期刊>Journal of Dispersion Science and Technology >Feasibility Studies on CO2 Foam Flooding EOR Technique After Polymer Flooding for Daqing Reservoirs
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Feasibility Studies on CO2 Foam Flooding EOR Technique After Polymer Flooding for Daqing Reservoirs

机译：大庆水库聚合物驱后CO2泡沫驱EOR技术的可行性研究

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摘要

Most of the high permeability reservoirs in the Daqing Oil Field have been conducted by water flooding and polymer flooding. Further development of such mature reservoirs has become a big challenge due to highly dispersed residual oil. Foam flooding, as a candidate enhanced oil recovery (EOR) technique, has been proposed. In this article, EOR evaluation of CO2 foam flooding after polymer flooding has been conducted on homogeneous sandpack cores flooding tests at the reservoirs condition. Results indicated that CO2 foam flooding could enhance considerable oil recovery, even if the oil recovery occurs after polymer flooding. It was also found that higher quality foam with higher pressure gradient could improve larger swept volume and, thus, recovered more residual oil than lower quality foam did. The influence of both the injection strategy and solubility of CO2 in brine on EOR of CO2 foam flooding was also studied.
机译：大庆油田的大多数高渗透油藏都是通过注水和聚合物驱进行的。由于残余油的高度分散，这种成熟油藏的进一步开发已成为一个巨大的挑战。已经提出了泡沫驱油作为增强石油采收率（EOR）的候选技术。在本文中，在储层条件下，均质砂包岩心驱油测试中对聚合物驱后的CO2泡沫驱油进行了EOR评价。结果表明，即使在聚合物驱之后发生采油，CO2泡沫驱也可以显着提高采油量。还发现具有较高压力梯度的高质量泡沫可以改善较大的扫掠体积，因此，与质量较低的泡沫相比，可以回收更多的残留油。还研究了注入策略和盐水中CO2的溶解度对CO2泡沫驱驱EOR的影响。

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