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首页> 外文会议>SPE Asia Pacific improved oil recovery conference (APIORC 01) >Successful Field Test of the First Ultra-Low Interfacial Tension Foam Flood
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Successful Field Test of the First Ultra-Low Interfacial Tension Foam Flood

机译：第一次超低界面张力泡沫驱的成功现场测试

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An important method to increase the recovery of reservoirs isrnASP (alkaline/surfactant/polymer) flooding to lower the IFTrn(interfacial tension) between the crude oil and displacing fluidrnto an ultra-low value (<10-3 mN/m) to increase therndisplacement efficiency and at the same time to increase thernviscosity of the displacing fluid in order to increase thernvolumetric sweep efficiency. However, the alkaline in thernASP fluid makes it difficult to increase the viscosity byrnpolymers. Therefor, experiments were performed by addingrnnatural gas to the ASP fluid to form an ASP foam (ASPF)rndisplacing fluid. This ASPF fluid should have therncharacteristics of an ultra-low IFT, high displacementrnefficiency and also low mobility, which should increase thernvolumetric sweep efficiency also.rnThis paper introduces the results of ASPF tests in thernlaboratory and field. The experimental results in the labrninclude the foaming ability of the ASPF, the stability of thernfoam, its IFT, resistance to flow in cores, the incrementalrnrecovery of cores of different heterogeneity and thernrelationship between incremental recovery and residual oilrnsaturation and polymer concentration. The field results includernreservoir description, well pattern, composition of the injectedrnASPF, injection and production conditions and problemsrnencountered.rnGood results were obtained in the field. The current recoveryrnfactor is already 65.6% OOIP. The final recovery is estimatedrnto reach 71.3% OOIP.
机译：提高油藏采收率的一种重要方法是用ASP（碱性/表面活性剂/聚合物）驱油以降低原油和驱替液之间的IFTrn（界面张力）至超低值（<10-3 mN / m）以增加驱油量效率，同时增加驱替液的粘度，以提高体积扫描效率。但是，ASP流体中的碱性使其难以通过增聚物增加粘度。因此，通过将天然气添加到ASP流体中以形成ASP泡沫（ASPF）置换流体来进行实验。这种ASPF流体应具有超低IFT，高位移效率和低迁移率的特点，这也应提高体积扫描效率。本文介绍了ASPF在实验室和现场的测试结果。该实验室的实验结果包括ASPF的发泡能力，泡沫的稳定性，IFT，岩心流动阻力，不同非均质岩心的增量采收率以及增量采收率与残余油饱和度和聚合物浓度之间的关系。现场结果包括储层描述，井网模式，注入的ASPF的组成，注入和生产条件以及遇到的问题。当前的恢复因素已经是OOIP的65.6％。最终回收率估计将达到OOIP的71.3％。

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