底水油藏水平井配套暂堵实现强凝胶堵水技术研究

发布时间：2018-05-27 03:15

本文选题：底水 + 筛管　；参考：《钻采工艺》2017年01期

【摘要】：底水油藏筛管完井水平井含水上升后,复杂的地下油水关系以及出水部位的不确定性使得堵水难度较大。利用疏松砂岩油藏物性非均质严重及堵剂选择性进入的特点,通过暂堵工艺可使地层堵剂进水层而不污染油层,达到既封堵出水又保护油层的目的。通过实验研究,系统评价了一种热敏暂堵体系的性能,开展了并联岩心管模拟实验。实验结果表明,热敏暂堵体系初始强度10~26 kPa,温度作用下实现降解时间3~15 d可控,降解后渗透率恢复值高于90%;基于热敏暂堵体系,采用多轮次暂堵剂放置工艺,可实现对油层的保护。现场试验表明,配套暂堵实现强凝胶堵水技术可实现对筛管完井水平井的封堵,达到保护油层、降液增油的目的,为下一步治理此类问题的水平井提供了一种技术支撑。
[Abstract]:After the water cut of sieve tube completion horizontal well in bottom water reservoir rises, the complicated underground oil-water relationship and the uncertainty of the outlet water position make the water plugging more difficult. Based on the characteristics of serious heterogeneity of physical properties and selective entry of plugging agent in loose sandstone reservoir, through temporary plugging technology, the influent layer of formation plugging agent can be made without polluting oil layer, and the purpose of sealing out water and protecting reservoir can be achieved. The performance of a heat sensitive temporary plugging system was systematically evaluated and the parallel core pipe simulation experiment was carried out. The experimental results show that the initial strength of the temporary plugging system is 10 ~ 26 KPA, the degradation time is controlled for 3 ~ 15 days under the action of temperature, and the permeability recovery value after degradation is higher than 90. Based on the heat sensitive temporary plugging system, a multi-cycle temporary plugging agent placement process is adopted. The reservoir protection can be realized. Field tests show that temporary plugging and strong gel plugging technology can be used to seal horizontal wells in sieve tube completion wells, to protect reservoir and increase oil production, and to provide a technical support for the future treatment of such problems in horizontal wells.
【作者单位】：中石化胜利油田分公司桩西采油厂;
【分类号】：TE358.3

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