第33卷第3期 2016年5月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3696/j.issn.1001-5620.2016.03.021
Vol.33 No.3 May2016
径向井水力压裂摩阻影响因素与计算公式龚迪光，曲占庆，郭天魁，巩法成，田旭新，黄子桐
（中国石油大学（华东）石油工程学院，山东青岛266580）
粪迪光等径向井水力压裂摩阻影响因素与计算公式[].钻并液与完井液，2016，33（3)：102-106.
要为研究井眼内径及压裂施工参数对径向井压裂摩阻影响规律和确定井眼内压裂液摩阻大小，使用中国石油大学摘要
（华东）研制的压裂液摩阻测试系统（主要由摩阻测试控制中心、压裂液调配签、可调速螺杆泵、变径管道、高灵敏度压力测量仪、电子流量计组成），模拟径向并中压裂液的流动状态，并对压裂液摩阻进行准确测量，分析了影响压裂液摩阻的主要因素。实验结果表明，对径向井摩阻影响由大到小的因素依次为：井眼内径、排量、粘度、支撑剂粒径和砂比，且影响规律各有不同。采用降阻比原理，通过对322组实验数据进行回归报合，建立了考虑并眼内径、排量、压裂液粘度、支撑剂粒径及砂比的径向并瓜胶压裂液摩阻损失计算关系式。利用相关系数检验法计算标准估计误差为0.140，拟合回归方程有
效。实验发现，瓜胶压裂液黏度对摩阻有双重影响：
一方面会增加流体内部以及流体与管壁间的剪切应力，导致摩阻损失增大；
，同时对支撑剂控制能力增强，促使压裂液摩阻损失减小。
另一方面，随着黏度增加，聚合物溶液产生转换延迟效应，
关键调摩阻测试；摩阻影响因素；径向井；降阻比；水力压裂；压裂液；正交实验
文章编号：1001-5620（2016）03-0102-05
中图分类号：TE357.12
文献标识码：A
Factors Affecting Friction Loss of Hydraulic Fracturing in Ultra-short Radius Radial Wells and the
CalculatingEquationThereof
GONG Diguang, QU Zhanqing, GUO Tiankui, GONG Facheng, TIAN Xuxin, HUANG Zitong(School ofPetroleumEngineering,ChinaUniversityofPetroleum,Qingdao,Shandong266580)
Abstract The friction loss testing equipment (composed of friction testing controller, fracturing fluid distributor, speed-controllable screw pump, pipes with varied diameters, high-sensitivity pressure gauge, and electric fow meter) developed by China University of Petroleum (East China) has been used to study the effects of borehole diameters and fracturing parameters on the friction loss of fracturing ultra-short radius radial (URR) wells and to calculate the magnitude of the friction losses of the fracturing fluid. The flow conditions in URR wells were simulated and the friction losses of the fracturing fluids used accurately measured. Analysis of the experiment results shows that factors affecting the friction losses ofthe fracturing fuids in URR wells are, in the order of decreasing importance, hole diameter,flow rate, viscosity, particle size of proppant, and sand content, and the effects varies in different conditions An equation for the calculation of friction losses of guar gum fracturing fluid in URR wells has been developed taking into account the aforementioned factors, through the regression fits of 322 sets of data and based on the principle of reducing friction ratios. The standard error of estimate calculated from correlation coefficient testing method is 0.140, indicating that the regression fit equation is valid. It has been found through the experiments that the viscosity of the guar gum fracturing fluid has dual effects on the friction; the viscosity, by increasing the intrinsic shear stress and the shear stress between fluid and the wall of the pipe, increases the friction losses of the fracturing fluid. On the other hand, with an increase in viscosity, a transition delay is being developed in the polymer solution, and the polymer solution has stronger control over the proppants used, thereby decreases the friction losses of the fracturing fluid. Key words Friction loss testing; Factors affecting friction loss; Ultrashortradius radial well; Reducefrictionratio; Hydraulic fracturing: Fracturing fluid; Orthogonal experiment
基金项目：国家自然科学基金青年基金项目“径向钻孔引导水力压梨裂缝定向扩展机理研究"（51404288)；大学生创新创业训练计划项目“径向井水力压裂降库阻技术研究"(201510425014)；中国石油大学（华东）研究生创新工程资助项目(YCX2014010)。
第一作者简介：冀光，1983年生，男，中国石油大学（华东）在读博士研究生，现主要从事油气田开发研究工作。
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