钻井液防泥包性能室内动态评价实验方法

发布时间：2018-09-17 08:52

【摘要】：钻具泥包一直是影响钻井速度和困扰工程技术人员的问题。选取怀俄明州天然的钠基膨润土块HOLEPLUG作为实验用模拟钻屑,利用自制的钢棒和老化罐的滚动模拟井下钻进状况,通过对模拟钻屑的粒径、质量以及热滚时间和基浆组成等参数的筛选,建立了动态评价钻井液防泥包性能的室内实验方法。评价实验确定的模拟钻屑粒径为6~10目、质量为25 g,热滚时间为15 min,基浆组成为3%海水膨润土浆+0.2%NaOH+0.2%Na_2CO_3+0.3%护胶剂+0.5%提切剂。进行了3组平行实验,3组数据相对平均偏差仅为2.45%,说明本文实验方法具有较好的可重复性。选取4种海上常用钻井液体系进行了室内动态评价实验,实验结果与现场反馈情况相同,说明本文实验方法具有很好的准确性,可为有关科研和钻井生产提供可靠依据。
[Abstract]:The mud bag of drilling tool is a problem that affects drilling speed and puzzles engineers and technicians all the time. The natural sodium bentonite block (HOLEPLUG) in Wyoming was selected as the simulated drilling chip for the experiment. The rolling of self-made steel bar and aging tank was used to simulate the downhole drilling condition, and the particle size of the simulated drilling chip was analyzed. Based on the selection of parameters such as quality, hot rolling time and composition of base slurry, an indoor experimental method for dynamic evaluation of mud proof performance of drilling fluid was established. The experimental results show that the simulated drilling chip size is 6 ~ 10 mesh, the mass is 25 g, the hot rolling time is 15 min, and the composition of the slurry is 3% seawater bentonite slurry, 0.2%NaOH 0.2%Na_2CO_3 0.3% glue protectant 0.5% cutting agent. The relative average deviation of three groups of parallel experiments is only 2.45, which shows that the experimental method in this paper has good repeatability. Four kinds of commonly used offshore drilling fluid systems are selected for laboratory dynamic evaluation experiments. The experimental results are the same as those in the field. It shows that the experimental method in this paper has good accuracy and can provide reliable basis for scientific research and drilling production.
【作者单位】：中海油田服务股份有限公司油田化学事业部;
【分类号】：TE52

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