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CO_2增油技术主要包括CO_2驱油和CO_2吞吐两方面。本文从CO_2驱油的作用机理和应用情况出发,分析CO_2驱油技术在喇嘛甸油田一类油层聚后水驱的应用可行性;从CO_2吞吐的技术原理和应用情况出发,探讨了CO_2吞吐技术在喇嘛甸油田过渡带采油井的应用可行性。 相似文献
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当今社会快速发展,能源问题日益严峻。由于低渗透油藏低孔、低渗、自然能量不足等特点,采用常规方法已经不能有效采出原油,CO_2驱是三次采油方法中提高低渗透油藏采收率的一种方法。综述了CO_2驱油的机理、CO_2驱油效果的影响因素以及近些年来国内外CO_2驱油的应用现状,指出CO_2驱在我国低渗透油藏的可行性和巨大潜力。 相似文献
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《中国石油和化工标准与质量》2016,(14)
低渗透油田开发难度大,驱替介质注入困难,常规水驱很难取得理想经济效益。CO_2混相驱混相压力高,虽然采收率较高,但是经济效益较差。而CO_2非混相驱注入能力强,具有膨胀驱油、降粘作用及弹性驱动等三个驱油机理,比水驱提高采收率28个百分点,是一种理想的低渗透油藏的开发手段。 相似文献
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CO_2驱油技术是国外一项成熟的提高采收率方法,受到世界各国油田的广泛关注。非均质性作为CO_2驱重要的油藏和操作参数,对CO_2驱提高原油采收率的影响很大。安默德(Ahmed)等人通过敏感性分析研究了主要参数对CO_2驱采收率和产量的影响。研究结果显示,在不同非均质性条件下,在合理的注入速率下,采用五点法井网,单井控制面积0.48km~2,短周期WAG,水平井段尽量位于产层下部,长度与井距相等,可获得最大采收率。美国朗之利韦伯油田是世界第三大CO_2驱油田,从1986年开始实施至今仍然在产,后期CO_2气窜严重,通过非均质性研究,调整各项参数,并尝试泡沫和凝胶调剖等技术,取得较好开发效果。国外在CO_2驱油技术的研究方法和手段上取得较大进展,对我国一些油田开展的CO_2驱油技术研究具有重要的指导和借鉴意义。 相似文献
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《当代化工》2015,(11)
为解决低渗透油藏吸水能力差,注水开发比较困难等问题,在模拟F低渗透油藏条件下,通过CO_2驱替室内实验,以不同注入速度下CO_2驱替的采收率、生产气油比和注入压力为评价指标,探索了CO_2注入速度对驱油效果的影响。结果表明,CO_2驱替对于开采该油藏具有非常好的效果,但其效果与注入速度有关。注气量达到0.6~1.21 PV后,CO_2开始突破。随着CO_2注入速度增大,CO_2突破时机延后,最终采收率增加。当注入速度达到2.28 cm~3/min后,注入压力接近CO_2/油最小混相压力,驱替方式转变为CO_2混相驱,此时最终采收率明显高于其它注入速度下的最终采收率。根据实验结论,建议本区块CO_2驱注入速度为2.28~2.56 cm~3/min。 相似文献
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低渗油田普遍采用注水开发,已动用储层多存在单井产量低、注水困难、递减快、采收率低等问题,而CO_2混相驱在提高低渗油田石油采收率方面具有明显的技术优势。本文主要分析低渗透油藏CO_2混相驱室内实验和矿场应用的研究现状,总结CO_2混相驱中不同数值模型以及驱替模式的特点和局限性,并统计国外CO_2混相驱项目个数和产量的增长趋势,论证CO_2混相驱是开采低渗透油藏的有效方法。同时针对CO_2混相驱过程中所出现的问题提出有效建议,并对该技术在未来油田中的经济和环保作用提出新的展望。 相似文献
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针对姬源油田H3区块注水开发后期注水压力过高、地层亏空严重等问题,开展致密油藏CO_2驱试验研究。以实际地质资料和拟合良好的流体物性参数为依据,通过数值模拟技术,建立CO_2驱概念模型对注入方式、注入速度、气水比例、转注周期四个参数进行优化。研究结果表明,针对H3区块开展的CO_2驱工艺参数优化对驱油效果显著提高。 相似文献
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油田开发中注入介质的驱替效率和波及系数决定了最终采收率,目前二氧化碳驱替能够明显提高油田采收率,所以采用物理模拟和数值模拟的方法对比水驱和二氧化碳驱替中二者的不同,加深认识二氧化碳驱油机理. 相似文献
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本文介绍了国内外泡沫驱提高采收率技术的一些研究进展,主要包括氮气泡沫驱、二氧化碳泡沫驱和空气泡沫驱。综述了各种泡沫驱提高采收率的矿场应用现状和机理研究进展,并指出了泡沫驱的当前研究热点和未来发展方向。 相似文献
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K. Beltsios G. Charalambopoulou G. Romanos N. Kanellopoulos 《Journal of Porous Materials》1999,6(1):25-31
Vycor® membranes are surface-modified by a crosslinked commercial silicone which is subsequently subjected to oxygen plasma and converted to silica dioxide. Samples are examined by integral gas permeability of helium, nitrogen, methane and carbon dioxide, differential permeability of carbon dioxide and relative permeability of helium gas vs. water vapor. The modified surface is found to contain large micropores as well as a population of small nanopores. The new membrane may be appropriate for applications such as gas/vapor separations, reverse osmosis and the low molecular weight end of nanofiltration. 相似文献
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《分离科学与技术》2012,47(11):1573-1596
Abstract Permeation properties were analyzed for a mixture of CO2, O2, and N2 in a medium-size polysulfone hollow fiber permeator with a net permeation area of 4.22 m2. Measurements were conducted as a function of feed composition, reject flow rate, and feed pressure. Results included variations in species permeability, separation factor, permeate enrichment, reject depletion, and stage cut as a function of system parameters. Variations in permeation properties show strong dependence on feed composition, reject flow rate, and feed pressure. Permeability of carbon dioxide was higher at larger feed pressures and higher carbon dioxide content in the feed stream. Effect of increasing the reject flow rates on the permeability of carbon dioxide was affected by the system pressure and the carbon dioxide content in the feed stream. At low pressures, increase of the reject flow rate resulted in a decrease of carbon dioxide permeability. The opposite behavior was obtained at higher feed pressures. Increase of the reject flow rate reduced the gas residence time within the permeator. Increase of reject flow rate reduced species residence within the permeator and in turn increased resistance to species transport within the permeator. However, higher system pressures and carbon dioxide content in the feed stream resulted in larger levels of membrane plasticization, which increased the permeation rates of all species. The combined efféct of reducing the species residence time within the permeator and the level of membrane plasticization favored the permeation of carbon dioxide versus the other two species. Variations in other permeation properties, which include oxygen and nitrogen permeabilities, stage cut, permeate enrichment in carbon dioxide, and reject depletion in carbon dioxide, were also explained in terms of resistances encountered within the permeator and the membrane. 相似文献