共查询到19条相似文献,搜索用时 250 毫秒
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针对中原油田所属的文中油藏进入高含水开发后期剩余油分布零散,常规调驱剂耐温耐盐性差、有效期短的问题,开展了聚合物微球调驱机理研究。采用多元共聚合成方法,研发了由丙烯酰胺单体、2-丙烯酰胺基-2-甲基丙磺酸单体和N-乙烯基丙烯酰胺单体聚合而成的多元共聚聚合物微球深部调驱体系。 相似文献
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聚合微球是一种基于聚丙烯酰胺的可吸水溶胀凝胶树脂,在油田调驱中取得了良好的降水增油效果.随着开采重点逐渐向低渗、中低渗高温油藏偏移,聚合微球的粒径尺寸、缓膨性能以及耐温抗盐抗剪切性能成为重要的研究课题.该文对近年来不同聚合微球的结构特点和构效关系进行综述,总结了不同聚合微球所适用的油藏条件,分析了聚合微球粒径和溶胀性能的影响因素,探讨了聚合微球的调驱机理,并对聚合微球的研究方向进行了展望.针对聚合微球关于纳米尺度的报道较少,高温下溶胀速度快,驱油机理单一等问题,需要加深对聚合微球溶胀机理和黏弹机理的研究,优化反相微乳液法合成条件,研发具有核壳结构的纳米聚合微球,并与其他化学试剂协同调驱,从而拓宽聚合微球在低渗、中低渗高温油藏的应用领域. 相似文献
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易有权 《中国石油和化工标准与质量》2012,33(15):119
本文针对瓦窑堡采油厂油藏低孔、低渗等特点,对比分析了注水开发效果及其规律。对各个公司历年在瓦窑堡采油厂做过的调驱、调驱井作效果评价,总结历年稳产措施成败,在此基础上,找出对瓦窑堡采油厂油藏有利的调驱技术及化学药剂组合。经过分析认为常规强凝胶调驱堵水技术和弱凝胶深部调驱技术不适合于低孔、低渗油藏的控水稳油。预交联颗粒通过吸水膨胀后能够有效封堵大裂缝出水通道,调整吸水剖面;考虑到中小裂缝与常规孔隙型油藏的差别,其渗流能力很强,缔合聚合物深部调驱凝胶有别于常用的强凝胶调驱堵水剂和弱凝胶深部调驱剂,具有中等的凝胶强度和较长的成胶时间,不仅能够有效驱替中小裂缝中的原油,而且可以进入地层深部,使注入水发生流向改变,显著提高波及效率,进而大幅度提高采收率。对适合于瓦窑堡油藏应用的预交联颗粒/缔合聚合物凝胶复合深部调驱体系应用性能进行了效果分析评价。在瓦窑堡油藏平均温度33.1-46.4℃和矿化度58788mg/L-97148mg/L条件下,预交联颗粒具有膨胀倍率高、耐温耐盐性能好、封堵效率高、调驱吸水剖面能力强和较好的提高采收率潜力等特点。 相似文献
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聚合物微球在溶胀以前粒径较小,能随注入水顺利进入油藏深部,在地层高温作用下,聚合物微球吸水溶胀,粒径变大,最后以架桥的方式堵塞地层喉道,实现油藏的深部调剖。在低倍显微镜下观察岩心切面的微球,可以明显看到其运移—架桥—堵塞—变形—突破再运移—再堵塞的调剖过程。宏观机理验证中发现注入聚合物微球后,驱替压力明显上升,证明了堵塞的存在。通过注入参数优选,最后发现0.3%微球和0.5%表面活性剂1∶1在0.5 m L/min速度下交替注入0.5 PV,溶胀48 h后的驱油效果最好。 相似文献
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元A长9油藏为三叠系特低渗透油藏,含油性好,渗流能力强,但受储层敏感性及非均质性影响,注水压力高,提压过程中导致动态缝开启,注入水沿高渗通道单向突进,加速油井见水,常规注采调控已无法满足油藏高效开发需求。通过在该区开展聚合物微球调驱试验,采用50nm粒径聚合物微球,在注入浓度为1 000mg/L,注入量为0.3PV时,有效封堵水驱高渗带,扩大水驱波及体积,提高低渗储层动用程度1.1%,递减大幅下降12.4%。证明聚合物微球调驱技术是该区开发中后期提高采收率的有效手段之一。 相似文献
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波场采油技术以其成本低,工艺简单,对环境无污染,效果显著等特点,已经受到各国的关注,低频人工谐振波已在油田广泛应用。膨胀型纳米柔性微球很好的解决了低渗透,特低渗透油藏深部调剖中"注得进、堵得住"的技术难题,为低渗透,特低渗透油藏的进一步开发提供了很大帮助。故研究低频人工谐振波对纳米微球深部调剖封堵效果影响就显得尤为重要,以实现二者在低渗透油田开发中的合理结合。 相似文献
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Polymer microspheres as fluid diverting agents have been applied for profile control in deep reservoirs. However, its reservoir adaptability strictly requires the matching between the particle size and the pore radius, which are hard to realize due to uncertainty of pore radius caused by long-term water flooding. That behavior has severely reduced their plugging performance to the large channel. The objective of this study was to prepare a kind of intelligent sustained-release microgel to solve the problem, which could slowly release of sodium silicate during migration, form the larger aggregates and plug high permeability reaching deep reservoir. We developed a novel blocking agent, which is an amphoteric microgel (OICMS) synthesized by light-initiated polymerization followed by the adsorption of a sodium silicate solution. The microgel properties, including the adsorption and release properties of a sodium silicate solution, and its influencing factors were investigated. The results showed that the OICMS had larger adsorption and release ratio of sodium silicate than conventional polymer microspheres, influenced by the ionic degree, molecular weight, amount of pore-forming agent, and cross-linking density. 相似文献
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针对胜利油田稠油油藏地质特点及开发难点,重点介绍了中深层特超稠油油藏、浅薄层超稠油油藏、敏感性稠油油藏和低渗透稠油油藏等复杂稠油油藏的开发技术,并对其提高采收率机理和现场应用效果进行了总结概括。在此基础上,根据目前研究进展指出了稠油热采开发技术的发展方向,重点介绍了超深层低渗稠油和浅薄层特超稠油的开发技术及其应用。 相似文献
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Static adsorption and dynamic retention of an anti‐salinity polymer in low permeability sandstone core
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The technical viability of enhancing oil recovery (EOR) using polymer flooding has been verified. Through correcting the unfavorable mobility ratio, polymer flooding could significantly improve the macroscopic sweep efficiency of waterflooding, which makes it attractive in middle to high permeability reservoirs. However, as the depletion of these easy‐to‐produce resources, the interests of oil industry will be diverted to low permeability reservoirs and polymer flooding is believed to be one of the key methods for this type of reservoir. To meet this technological tendency, the current work investigated the applicability of an anti‐salinity polymer (KYPAM) in low permeability sandstone reservoirs. The interactions between polymer and sandstone surface including static adsorption and dynamic retention were addressed. Static adsorption data proved that the adsorptive behavior of this anti‐salinity polymer was closely related to molecular weight and concentration. The quantity of the detained KYPAM polymer in the sandstone core rapidly increased once the permeability dropped below 38 mD. High molecular weight KYPAM experienced noticeable retention compared with low molecular weight polymers resulting from the large hydrodynamic size. Due to polymer retention, the permeability of the sandstone core was significantly influenced particularly for the low permeability cores. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44487. 相似文献
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反相微乳液聚合制备丙烯酰胺类聚合物微球的研究进展 总被引:1,自引:0,他引:1
反相微乳液聚合技术具有稳定性好、固含量高、聚合速率快等优点而成为研究热点。本文系统地综述了近年来国内外应用反相微乳液聚合制备丙烯酰胺类聚合物微球的研究进展,概述了微乳液的基本理论及其特征,对稳定微乳液的制备进行了讨论;着重归纳了丙烯酰胺类的反相微乳液聚合,详述了聚合体系各组分的选择,同时探讨了影响聚合反应的因素,认为应研究新型表面活性剂以实现高单体浓度的聚合;介绍了聚合物微球在油田应用中提高采收率方面的应用现状。最后指出了其在深部调剖堵水领域存在的问题,以离子液体代替传统聚合体系组分制备集智能性、复合性、多功能性等综合性能于一体的聚合物微球是其未来发展方向之一。 相似文献