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首页> 外文会议>SPE Russian Petroleum Technology Conference >Experience in Stimulating Multilateral Horizontal Wells Using a Multilateral Reentry System and a Dispersion of Acid and Solvent and a Viscoelastic Diverting Acid
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Experience in Stimulating Multilateral Horizontal Wells Using a Multilateral Reentry System and a Dispersion of Acid and Solvent and a Viscoelastic Diverting Acid

机译：使用多边再入系统和酸和溶剂分散刺激多边水平孔的经验以及粘弹性转移酸

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The Bashkirian Formation within the Stepnoozerskoe oil field is represented by carbonate rocks with a complex geological structure characterized by high lateral and vertical heterogeneity. The reservoir temperature is about 23 deg C, the pressure does not exceed hydrostatic, the viscosity of oil in the reservoir conditions exceeds 200 cP, porosity and permeability of the reservoir vary widely. In 2016, a pilot project to drill 2 multilateral wells on the Bashkir Formation was carried out; each well has 4 sidetracks (fishbones). Development of the reservoir with multilateral horizontal wells based on the simulation results allows to accelerate oil production, significantly improving the project economics, and the presence of horizontal sidetracks mitigates the risks associated with high lateral heterogeneity and ensures maximum contact of the wellbore with the reservoir. To stimulate the inflow into the wells, it is necessary to conduct acid treatments. Two unique works were carried out in Russia with the use of a multilateral reentry system for detection and selective access into different boreholes. This system made it possible to orient and successfully enter the multilateral well with 4 open horizontal sidetracks for subsequent acid treatment. The treatment of the bottomhole zone was carried out with the help of self-diverting acidic compositions. In one of the wells, a buffer of hydrocarbon solvent, followed by steps of retarded hydrochloric acid injection and self-diverting acidic composition based on surface active agents was used. In another well, a dispersion of acid and solvent and a viscoelastic diverting acid on a polymer free base were used as a buffer. In this paper, the authors describe the experience of stimulating multilateral horizontal wells and a comparative analysis of the results obtained.
机译：所述Stepnoozerskoe油田内的巴什基尔形成是通过碳酸盐岩特征在于高的横向和纵向异质性地质结构复杂表示。贮存温度为约23℃，压力不超过静液压，油在储存条件下的粘度超过200厘泊，孔隙率和储层的渗透率有很大的不同。在2016年，一个试点项目，对钻巴什基尔形成2个多分支井进行;每个孔具有4个侧钻（鱼骨）。基于模拟结果多分支水平井储层的开发，允许加速石油产量，显著提高了项目的经济和水平侧钻减轻高横向不均匀性，确保其与储层井眼的最大接触相关的风险的存在。刺激流入孔中，有必要进行酸处理。两个独特的作品在俄罗斯开展与使用多边再入系统的检测和选择性接入到不同的钻孔。该系统使得能够定向和成功地与用于随后的酸处理4个打开水平侧钻进入多分支井。井底区的治疗与自我分流酸性成分的帮助下进行的。在孔中的一个，烃类溶剂的缓冲液，进行延迟盐酸注入和基于表面活性剂的自转向酸性组合物的步骤中使用。在另一个井，酸和溶剂，在聚合物游离碱的粘弹性分流酸的分散体被用作一个缓冲区。在本文中，作者描述了刺激多边水平井和取得的成果进行了比较分析的经验。

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