第38参第5期 2016年9月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2016)05-0601-05
DOI: 10.13639/j.odpt.2016.05.011
固井冲洗液冲洗效率评价方法
唐世忠饶富培吴华郑丽娜张学强
中国石油大潘沟田公司采沟工艺研究院
Vol. 38 No. 5 Sept. 2016
弓用格式：唐世患，统富培，吴华，郑丽娜，张学强，周并冲洗液冲洗效率评价方法「J」，石油钻采工艺，2016，385)：601-605.
摘要：针对目前固并冲洗效率评价方法在实验重复性、测试准确性等方面存在的不足，研制了一种新的冲洗效率评价的装置及实验方法。利用牛额流体在2个同轴图简之间的环形区域内剪切速率分市规律，通过改变装置中杯体直径、转子转速，使冲洗液对杯体内坚的冲洗剪切建率与现场的冲洗剪切速率相等，测量冲洗前后杯体内坚所挂钻并液的变化量，从而计算得到冲洗效率。利用该方法对在用的3种冲洗液的冲洗效率进行了评价，依据评价结果优选了冲洗液类型，并优化了冲洗液用量。实验结果表明：该方法能够模拟固井施工中冲洗液对井壁的冲洗剪切速率及冲洗时间，在相同实验中冲洗效率结累的变化率控制在5%以内，具有较高的重复性，可以作为冲洗效率对比评价的一种方法。
关键词：固井；冲洗液；冲洗效率；剪切速率；冲洗时间；评价方法
中图分类号：TE256
文献标识码：A
Assessmentmethodforflushing efficiency of flushingliquid in cementing
TANG Shizhong, RAO Fupei, WU Hua, ZHENG Lina, ZHANG Xueqiang
Prodarction Technology Research Instifute of PefroChina Dagang Oijfield Company, Tianjin, 300280, Chinc
Citation: TANG Shizhong, RAO Fupei, WU Hua, ZHENG Lina, ZHANG Xueqiang. Assessment method for flushing efficiency of flushing liquid in cementing [ J] . Oil Drilling & Production Technology, 2016, 38(5): 601-605.
Abstract: Innovative devices and test methods have been developed for assessment of flushing efficiency to compensate insuffi-ciencies of existing methods in repeatability and accuracy. Newtonian fluids are used to highlight distribution of shearing rates in circular zones between 2 coaxial cylinders. By changing diameters of cylinders and rotation speeds of rotors, shearing rate of flushing liquid on internal wall of cylinders can be matched with the shearing rate on site. According to changes in drilling fluid attached to internal wall of the cylinder before and after flushing, flushing efficiency can be determined effectively. The newly-developed technique has been used to assess flushing efficiencies of three different flushing liquids. In accordance with relevant assessment conclusions, optimal flushing liquid type and volume can be identified. Research results show the innovative method may effectively simulate shearing rate and flush-ing time of flushing liquid to borehole sidewalls during cementing operation. In the same test, changes in results of flushing efficiency can be controlled within 5%. With relatively high repeatability, the method can be used to assess flushing efficiencies.
Key words: cementing; flushing liquid; flushing efficiency; shearing rate; flushing time; assessment method
固并作业中，性能优良的冲洗液能够较好地清
除并壁上的虚泥饼，为水泥与地层（套管)股结提供良好的界面条件，从而提高固并质量，而冲洗效率是
评价冲洗液性能优劣的重要指标，是优选冲洗液类型、优化冲洗液用量的首要依据。评价固并冲洗液冲洗效率的方法较多11-2，目前普遍使用的评价装置
基金项目：中油股份公司重大科技专项“大港沟区大油气田勘探开发关键技术研究“的子课题“高效钻究并及沟气层保护配套技术研究”
(编号：2012E-10)
第一作者：唐世患（1969-),1990年毕业于天津大学石油分投石油地质勘查专业，现主要从事钻完并工艺技术研究工作。电话：022-
63959513。E-mail; tangsz@petrochina.com.cn
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