无碱二元体系在孤东七区油藏流变性和界面活性分布

为更好地揭示无碱二元体系在油藏中性能损失规律,结合胜利孤东七区非均质强、储层结构疏松等油藏条件,在不同长度岩心中开展二元体系溶液渗流实验。通过进行聚合物溶液对表面活性剂界面活性以及表面活性剂对聚合物溶液黏度的影响来研究两者间的相互作用;并在不同长度岩心出口端取采出液,测试不同位置处黏度与界面张力的变化研究该二元体系溶液在近井和油藏流变性和界面活性分布特征。结果表明:加入聚合物溶液后,二元体系界面张力变化规律与单一表面活性剂相似,但使油/水界面张力达到超低时间要长;表面活性剂对聚合物溶液黏度影响不大,二元体系能保持良好的增黏特性;渗流开始时,二元体系A和B黏度保留率较单一聚合物溶液要高,而界面活...

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Published in石油钻采工艺 Vol. 34; no. 6; pp. 85 - 89
Main Author 吴志伟 岳湘安 赵方剑 刘青 李晓胜 张立娟
Format Journal Article
LanguageChinese
Published 中国石油大学石油工程教育部重点实验室,北京 102249%中国石油大学石油工程学院,北京 102249%中国石化胜利油田地质科学研究院,山东东营 257015 2012
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ISSN1000-7393

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Summary:为更好地揭示无碱二元体系在油藏中性能损失规律,结合胜利孤东七区非均质强、储层结构疏松等油藏条件,在不同长度岩心中开展二元体系溶液渗流实验。通过进行聚合物溶液对表面活性剂界面活性以及表面活性剂对聚合物溶液黏度的影响来研究两者间的相互作用;并在不同长度岩心出口端取采出液,测试不同位置处黏度与界面张力的变化研究该二元体系溶液在近井和油藏流变性和界面活性分布特征。结果表明:加入聚合物溶液后,二元体系界面张力变化规律与单一表面活性剂相似,但使油/水界面张力达到超低时间要长;表面活性剂对聚合物溶液黏度影响不大,二元体系能保持良好的增黏特性;渗流开始时,二元体系A和B黏度保留率较单一聚合物溶液要高,而界面活性主要损失在近井地带(相对距离肚20%),并在相对距离60%~100%处达到稳定;渗流达到稳定时,二元体系黏度保留率在0~20%处从100%降为84.2%,并在油藏深部分布均匀,受到相对距离的影响不大,二元体系与油滴间的界面张力在60%时达到稳定。
Bibliography:WU Zhiwei, YUE Xiang'an, ZHAO Fangjian, LIU Qing, LI Xiaosheng ZHANG Lijuan ( 1. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; 2. School of Petroleum Engineering, China University of Petroleum, Beifing 102249, China; 3. Geological Scientific Research Institute of Sinopec Shengli Oilfield Company, Dongying 257015, China )
In order to reveal the property loss law of surfactantpolymer ( SP ) system in the reservoir, combining with the reser voir conditions of strong heterogeneity and unconsolidated reservoir structure in the seventh block of Gudong oilfield, flow experiments were carried out in the cores with different lengths. The interaction between surfactant and polymer was studied through the change of interfacial activity and viscosity after the polymer and surfactant were added into SP system. The produced fluid was taken out from outlet end of cores with different lengths, and interfacial activity and viscosity were measured to study distribution charac
ISSN:1000-7393