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首页> 外文期刊>Journal of Surfactants and Detergents >Experimental Study of In-Situ CO2 Foam Technique and Application in Yangsanmu Oilfield
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Experimental Study of In-Situ CO2 Foam Technique and Application in Yangsanmu Oilfield

机译：杨三母油田原位CO2泡沫技术试验研究及应用

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摘要

The Yangsanmu oilfield of Dagang is a typical heavy oil reservoir. After the maximum primary production (waterflooding), more than half of the original oil is still retained in the formation. Therefore, the implementation of an enhanced oil recovery (EOR) process to further raise the production scheme is inevitable. In this work, a novel in-situ CO2 foam technique which can be used as a potential EOR technique in this oilfield was studied. A screening of gas producers, foam stabilizers and foaming agents was followed by the study of the properties of the in-situ CO2 foam systems through static experiments. Core-flooding experiments and field application were also conducted to evaluate the feasibility of this technique. The results indicated that the in-situ CO2 foam system can improve both the sweep and displacement efficiencies, due to the capacity of this system in reducing oil viscosity and interfacial tension, respectively. The EOR performance of the in-situ CO2 foam system is better than the single-agent and even binary system (surfactant-polymer) flooding. The filed data demonstrated that the in-situ CO2 technique can significantly promote oil production and control water cuts. These results are believed to be beneficial in making EOR strategies for similar reservoirs.
机译：大港阳三木油田是典型的稠油油藏。在最大一次生产（注水）后，一半以上的原始油仍保留在地层中。因此，不可避免的是要实施强化采油（EOR）工艺以进一步提高生产方案。在这项工作中，研究了一种新颖的原位CO2泡沫技术，该技术可以用作该油田的潜在EOR技术。在对气体产生剂，泡沫稳定剂和发泡剂进行筛选之后，通过静态实验研究了原位CO2泡沫系统的性能。还进行了注水实验和现场应用，以评估该技术的可行性。结果表明，原位CO2泡沫体系可以提高扫掠和驱替效率，这是由于该体系分别具有降低油粘度和界面张力的能力。原位CO2泡沫系统的EOR性能优于单剂甚至二元体系（表面活性剂-聚合物）驱油。归档数据表明，原位CO2技术可以显着促进石油生产并控制含水率。相信这些结果对于制定类似储层的EOR策略是有益的。

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