基于响应面法的压裂液混砂搅拌系统结构优化  

Structural Optimization of Fracturing Fluid Sand Mixing and Stirring System Based on Response Surface Method

作　　者：刘子豪 朱青林 管锋[1] 万锋[1] 刘先明 李梓睿 Liu Zihao;Zhu Qinglin;Guan Feng;Wan Feng;Liu Xianming;Li Zirui(School of Mechanical Engineering,Yangtze University)

机构地区：[1]长江大学机械工程学院

出　　处：《石油机械》2023年第9期108-113,131,共7页China Petroleum Machinery

基　　金：湖北省教育厅科学研究计划资助项目“不同钻井工况下溢流识别算法及自动化关井机理研究”(D20201305);湖北省中央引导地方科技发展专项“超深复杂工况井作业工具研制与应用示范”(2022BGE257)。

摘　　要：针对大排量、高砂比的压裂液混砂搅拌效果差,系统效率低、可靠性不高,混砂搅拌系统仿真模型与实际工况差异较大等问题,参考现场工作介质的流动特性,建立了压裂液混砂搅拌罐的有限元模型,并将混砂搅拌系统的搅拌时间作为优化目标。结合响应面BBD(Box-Behnken)试验设计,采用2阶多项式基函数构建混砂搅拌系统下搅拌叶角度、下搅拌叶直径、扰流板角度、扰流板数量等结构参数与混合时间的数学模型,并优化压裂液混砂搅拌系统结构。通过比较模型预测值与数值模拟分析值,并进行附加模拟测试,得出混合时间预测值与模拟值的相对误差为6.43%,从而验证了模型预测结果的准确性。针对响应面优化结果与初始结构开展混合性能对比研究,优化后的混合时间明显缩短,优化后结构的搅拌效率明显提高。研究结果可为压裂液混砂搅拌系统的结构优化提供参考。In order to solve the problems such as poor sand mixing and stirring effect of fracturing fluid with large displacement and high sand concentration,low efficiency and reliability of fracturing fluid sand mixing and stirring system,and large difference between simulation model and actual working condition of sand mixing and stirring system,referring to the flow behavior of field working medium,a finite element model for fracturing fluid sand mixing and stirring tank was built,and the stirring time of sand mixing and stirring system was taken as the optimization objective.Then,combined with the Box-Behnken(BBD)test design of response surface,the second-order polynomial basis function was used to build a mathematical model of mixing time and structural parameters such as the angle and diameter of lower stirring blade and the angle and number of interceptors,and optimize the structure of the fracturing fluid sand mixing and stirring system.By means of comparing the predicted values of the model with the analysis values of the numerical simulation as well as conducting additional simulation test,the relative error of mixing time between predicted value and simulated value was obtained as 6.43%,thus verifying the accuracy of the model prediction results.Finally,a comparative study of mixing performance was conducted on the response surface optimization results and the initial structure,the mixing time after optimization was obviously shortened,and the stirring efficiency of the optimized structure was obviously improved.The study results provide reference for the structural optimization of fracturing fluid sand mixing and stirring system.

关 键 词：压裂液 搅拌罐 响应面法 固液两相流 结构优化 数值模拟 

分 类 号：TE934[石油与天然气工程—石油机械设备]