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首页> 外文期刊>Transport in Porous Media >Shallow Subsurface Environmental Remediation by Using Tracer-Surfactant-Foam Processes: History-Matching and Performance Prediction
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Shallow Subsurface Environmental Remediation by Using Tracer-Surfactant-Foam Processes: History-Matching and Performance Prediction

机译：使用Tracer-Curfactant-Foam工艺进行浅地下环境修复：历史匹配和性能预测

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In situ subsurface remediation has been widely used as an efficient means of cleaning up non-aqueous phase liquid (NAPL) from contaminated soils and aquifer. The use of tracer, surfactant and foam is often considered to keep track of the propagation of injected fluids in the medium, dissolve and mobilize contaminants trapped by capillary forces, and overcome the level of heterogeneity and improve displacement and sweep efficiencies. This study shows an actual remediation process to reduce NAPL within a military base in South Korea, by injecting tracer and surfactant solutions together for a duration of 10 days. The site consists of 5 m-by-5 m area with 3 m depth under the existing structure of fuel-distribution facility. The results show that (a) computer simulations can be successfully performed to history-match the production of tracer and oil species from three extraction wells during field tracer and surfactant injection tests and (b) such a successful match can be combined with identification of the major pattern of the heterogeneity in the site. With estimated foam strengths from separate column tests, this study further extends the scope to the use of surfactant-foam remediation processes to examine how foam with a reduced gas mobility (causing higher apparent foam viscosity and pressure gradient) helps mobilizing and producing more oil, hence leading to improved displacement efficiency. Surfactant/foam processes are shown to have potential in overcoming subsurface heterogeneity and thus improving overall in situ remediation performance.
机译：原位地下修复已被广泛用作清洁来自受污染的土壤和含水层的非水相液（NaPL）的有效手段。通常认为使用示踪剂，表面活性剂和泡沫以跟踪培养基中注射的流体的传播，溶解和动员毛细血压捕获的污染物，并克服异质性水平并改善位移和扫掠效率。本研究表明，通过将示踪剂和表面活性剂溶液持续10天将示踪剂和表面活性溶液注入南部韩国在韩国军队基地内减少NAPL的实际修复过程。该遗址由5×5米区域组成，在现有的燃料配电设施结构下具有3米的深度。结果表明，（a）计算机模拟可以成功地执行历史 - 在现场示踪剂和表面活性剂注射孔期间从三种提取孔中生产示踪剂和油种的生产，并且（b）这样的成功匹配可以与识别结合现场异质性的主要模式。通过单独的柱试验的估计泡沫强度，该研究进一步扩展了使用表面活性剂 - 泡沫修复方法的范围，以检查如何用降低的气体迁移率（导致更高的表观泡沫粘度和压力梯度）有助于动员和产生更多的油，因此导致提高位移效率。表面活性剂/泡沫过程被示出具有克服地下异质性的电位，从而改善原位修复性能。

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