聚合物-弱凝胶调驱核磁共振可视化实验

发布时间：2018-05-07 10:33

本文选题：弱凝胶 + 聚合物　；参考：《石油勘探与开发》2017年02期

【摘要】：将核磁共振可视化技术和岩心驱替实验相结合,观察了弱凝胶在岩心中的分布特征和运移规律,对不同聚合物-弱凝胶组合方式下的驱油特征进行可视化实验研究。将聚合物和弱凝胶进行组合,设计了3种组合方式:水驱+聚合物驱(方式1),水驱+聚合物驱+弱凝胶驱(方式2),水驱+弱凝胶驱+聚合物驱(方式3)。对不同组合方式在驱替过程中的压力变化、T_2谱特征、核磁共振图像、驱油效率进行了研究。研究表明,核磁共振图像可直观表征弱凝胶在岩心中的形态分布及运移特征,也可反映出残余油的分布特征;T_2谱特征表明聚合物和弱凝胶均具有调剖和驱油作用,组合方式2的调剖效果最明显;3种组合方式中,组合方式2的驱油效率最大,为78.84%,比初次水驱提高了18.33%。
[Abstract]:By combining nuclear magnetic resonance visualization technology with core displacement experiment, the distribution and migration of weak gel in core were observed, and the oil displacement characteristics of different polymer and weak gel combinations were studied by visual experiments. Three combinations of polymer and weak gel were designed: water flooding polymer flooding (mode 1), water flooding polymer flooding weak gel flooding (mode 2), water flooding weak gel flooding polymer flooding (mode 3). The characteristics of T _ 2 spectrum, nuclear magnetic resonance image and oil displacement efficiency of different combinations during displacement are studied. The results show that the NMR images can directly characterize the morphological distribution and migration characteristics of weak gels in the core, and can also reflect the distribution characteristics of residual oil. The results show that both polymer and weak gel have profile control and oil displacement effects. The profile control effect of combination mode 2 is the most obvious, and combination mode 2 has the highest oil displacement efficiency, which is 78.84, which is 18.33 higher than that of the first water flooding.
【作者单位】：上海大学上海市应用数学和力学研究所;上海市力学在能源工程中的应用重点实验室;
【基金】：国家自然科学基金(50874071;51274136) 上海市重点学科建设项目(S30106) 国家高技术研究发展计划(863)项目(2008AA06Z201) 上海市教育委员会高峰学科建设项目
【分类号】：TE357.46

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