Study of the Efficiency of Gel and Polymer-Stabilized Foam Systems for Gas Shut-Off in Horizontal Wells

M. V. Zvada, Pavel Nikolaevich Belovus, Evgeny Ivanovich Sergeev, N. Glavnov, M. Varfolomeev, E. Saifullin
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Abstract

This article describes the assessment of effectiveness of gel and foaming agents for gas shut-off treatments in horizontal wells. The research is carried out through the implementation of a complex of special laboratory studies and analysis of the results using numerical modeling methods. A list of necessary laboratory experiments to minimize risks when carrying out work to limit gas inflow has been formulated, and approaches to carrying it out have been described. The program includes: free volume studies, filtration on linear and parallel core models. The results confirm the importance of studying not only the agent's physical characteristics at the reservoir conditions, but their interaction with reservoir fluids. The influence of different agents on the mobility of gas and oil was assessed as a result of linear core flooding experiments. In addition, the filtration tests on parallel cores were carried out aimed to determining the saturation selectivity. The series of numerical calculations was performed for the subsequent determination of the technological and economic effects of the treatment with gas blockers.
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凝胶和聚合物稳定泡沫体系在水平井关气中的效率研究
本文介绍了凝胶剂和发泡剂在水平井堵气处理中的有效性评价。该研究是通过实施复杂的特殊实验室研究和使用数值模拟方法分析结果来进行的。制定了一份必要的实验室实验清单,以便在进行限制气体流入的工作时将风险降到最低,并描述了实施该实验的方法。该项目包括:自由体积研究,线性和平行核心模型的过滤。研究结果证实,不仅要研究药剂在储层条件下的物理特性,还要研究它们与储层流体的相互作用。通过岩心线性驱油实验,评价了不同药剂对油气流动性的影响。此外,还进行了平行岩心的过滤试验,以确定饱和选择性。为了进一步确定气阻剂处理的技术和经济效果,进行了一系列数值计算。
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