共查询到19条相似文献,搜索用时 578 毫秒
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本文通过物理模拟方法,研究了在三元弱碱复合驱油体系中聚合物浓度对驱油效果的影响,表面活性剂浓度对驱油效果的影响,二元无碱(加牺牲剂)中表面活性剂浓度对驱油效果的影响,结果表明:在三元弱碱复合驱油体系中,当碱和活性剂的浓度不变,而改变聚合物的浓度时,随着聚合物浓度的增加,化学驱采出程度是增大的,当碱和聚合物的浓度不变时而改变表面活性剂的浓度时,化学驱采出程度随着表面活性剂浓度的增加而增大。二元无碱(加牺牲剂)体系:固定聚合物用量和牺牲剂用量,改变活性剂浓度后化学驱采出程度随活性剂浓度的下降而下降。 相似文献
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在贝雷岩心上开展不同化学驱体系的驱油实验,确定了不同驱油体系的驱油效果。结果表明:强碱三元体系效果好于弱碱三元体系,三元体系效果好于二元体系,二元体系效果好于高浓度聚合物驱,高浓聚合物驱好于普通聚合物驱。对影响三元复合驱效果的因素进了分析,三元体系碱和表活剂浓度越高,段塞越大,体系黏度越高,提高采收率幅度越大。 相似文献
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海上稠油油田在聚驱之后仍然会有很大一部分剩余油,而聚合物和表活剂组成的二元复合体系用来驱替聚驱后残留剩余油效果显著,为了在微观和宏观上进一步研究二元复合体系是如何动用聚驱后的剩余油,采取微观可视化实验、4层非均质岩心驱替实验、二维平面非均质岩心的驱油实验进行研究,通过结果分析得出二元复合体系可以有效地驱替簇状、柱状剩余油以及附着在岩壁表面的膜状剩余油,并且二元复合体系与油产生超低界面张力,其会动用一部分水驱和聚驱已波及到但无法采出的残余油,进而提高采收率. 相似文献
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张娜 《中国石油和化工标准与质量》2013,(14):154
草四断块沙四段33-35层系A油藏渗透率较低,原油粘度偏稠,采出程度低,剩余油比较富集。针对油藏特点,从静态和动态两个方面开展了热化学驱可行性分析;结合室内试验和数值模拟手段研究了聚合物驱、二元复合驱、热活性剂驱、泡沫驱和热水驱等五种热化学驱油方式的可行性,综合考虑技术与经济指标,最终确定聚合物驱作为最佳驱替方式。 相似文献
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介绍了渤海海上油田二元复合驱驱油的设计与开发方案,以新型表面活性剂(非离子型表面活性剂:DMES-14、TX-100)和疏水缔合聚丙烯酰胺(HAPAM)为主。二元复合驱驱油体系主要需要双子表面活性剂双十四酸乙二酯双磺酸盐型表面活性剂(DMES-14),疏水缔合聚丙烯酰胺以及取自海上油田平台的回注水。该体系同时对粘度和表面张力进行了研究。结果表明,该体系在不要求浓度的情况下可以达到超低界面张力2.48×10~(-3) m N/m,在油藏中粘度可达到55 m Pa;随后的岩心驱替试验表明,在水驱含水75%的状况下进行二元复合驱驱油效果可提高至38.6%以上。总之,该实验研究提供了非离子表面活性剂与疏水缔合水溶性聚合物驱油体系的实用信息以及可以在渤海海上油田进行大规模应用HAPAM。 相似文献
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针对辽河油田区块的油藏条件,在室内进行了无碱二元驱和弱碱三元驱提高原油采收率的研究。对3种表面活性剂SL-YD、HL-1、BH进行了筛选,优选出了对该地层原油具有最佳降低界面张力效果的表面活性剂SLYD和HL-1;然后与聚合物PAM复配,组成二元体系,最佳配方为0.16%PAM+0.20%SL-YD;最后筛选得出了弱碱三元体系0.16%PAM+0.15%SL-YD+0.30%Na2CO3。室内实验表明,无碱二元体系和弱碱三元体系可以使油水界面张力降到10-3mN/m以下,可以大幅度提高原油的采收率,增幅超过10%。 相似文献
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Polymer flooding characteristics of partially hydrolyzed polyacrylamide (HPAM) solution with the addition of NaOH were examined in homogeneous glass‐bead packs. The heavy oil recovery in unconsolidated sandstone formations by applying the alkali‐polymer flooding was observed. Experimental results showed that HPAM solution was sensitive to temperature, salinity, and alkali, finding that alkali‐polymer solutions are more effective in improving viscosity than conventional polymer solutions. The solution of 0.5 wt % NaOH mixed with 1500 ppm HPAM (12 mol % hydrolysis degree) was found to be the optimal choice, which gives rise to the highest viscosity on the rheological characterization. Flood tests using the alkali‐polymer solution showed an increase in oil recovery by 30% over water‐flooding when the water‐cut reached 95%, indicating that alkali‐polymer could be more effective in improving sweep efficiency than polymer flood. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
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From Phase Behavior to Understand the Dominant Mechanism of Alkali-Surfactant-Polymer Flooding in Enhancing Heavy Oil Recovery
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Bing Wei Laiming Lu Wanfen Pu Feng Jiang Kexing Li Lin Sun Fayang Jin 《Journal of surfactants and detergents》2017,20(2):355-366
The primary objective of this work was to understand the dominant mechanism(s) of alkali‐surfactant‐polymer (ASP) flooding in enhancing heavy oil recovery. Chemical formulations were first optimized based on phase behavior studies. The data indicated that alkali and surfactant created a synergistic effect at the oil/water interface, which further decreased the interfacial tension (IFT) and improved the emulsification. However, it was also found that the addition of alkali was detrimental to the viscous properties of the chemical systems and caused the ultimate oil recovery to decrease. In other words, the macroscopic sweep efficiency as a result of viscosity was the primary factor determining the overall recovery of heavy oil followed by emulsification, which was verified by the phase behavior of the effluent. Based on the experimental results, we found that for this targeted heavy oil reservoir, surfactant‐polymer (SP) flooding was more appropriate than ASP flooding and it was not necessary to decrease the IFT to the ultralow level (10?3 mN/m) using alkali. Through chemical flooding, the incremental oil recovery was increased up to 27% of original oil in place, indicating the potential of this technique in heavy oil reservoirs. 相似文献
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针对渤海油田聚合物驱稠油采出液,研究了聚合物对其稳定性影响;合成了不同结构原油破乳剂和絮凝剂,讨论了药剂结构对处理效果的影响;研制出了一种原油破乳剂和一种絮凝剂。结果表明:(1)随着聚合物浓度的升高,原油乳状液中水珠直径与污水中油珠直径都逐渐变小,同时污水中油珠的Zeta电位逐渐升高;(2)具有分支结构的原油破乳剂脱水率比具有线性结构的原油破乳剂脱水率高,具有星形结构的原油破乳剂脱水率比具有梳状结构的原油破乳剂脱水率高;(3)针对该污水体系,絮凝剂的最佳合成条件为单体质量浓度为1%、阳离子度为40%、反应温度为5℃,引发剂浓度为0.15mmol·L-1;(4)破乳剂FA01在脱水温度为70℃,用量为200mg·L-1,脱水时间为60min条件下,脱水率达到86%;(5)絮凝剂WS05在温度为60℃,用量为50mg·L-1,时间为30min条件下,能将含聚污水中含油率降到50mg·L-1以下。 相似文献