| 考虑瞬态温度场的水平井水力冲砂临界排量 |
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| 引用本文： | 刘清友,汪兴明,徐涛.考虑瞬态温度场的水平井水力冲砂临界排量[J].西南交通大学学报,2014,27(6):1123-1129. |
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| 作者姓名： | 刘清友 汪兴明 徐涛 |
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| 基金项目： | 国家自然科学基金重点资助项目(51134004) |
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| 摘 要： | 针对目前油气田水平井水力冲砂施工难度大、难以辨识合理的冲砂排量的问题.基于水平井地层-井筒瞬时温度场模型,提出水平井环空临界流速计算模型,考虑瞬时温度场对冲砂液黏度的影响.通过有限体积法求解瞬时温度场,结合冲砂液温度-黏度方程,求取了水平井全井段全过程环空临界流速,在此基础上建立了临界排量计算新方法.通过对4种常用冲砂液进行实例分析表明:与不考虑温度情况相比,考虑温度时全过程最大环空临界流速分别增大了9.20%、17.26%、9.85%和7.64%,临界排量分别增大了8.33%、18.18%、10.00%和11.11%,说明了水平井水力冲砂排量计算考虑温度影响的必要性.
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| 关 键 词： | 水平井 颗粒运移 临界流速 力学模型 井筒温度 瞬态热传导模型 |
| 收稿时间： | 2014-03-10 |
Critical Discharge Flow of Sand Cleaning Fluid Considering Transient Temperature Effect of Horizontal Well |
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| LIU Qingyou,WANG Xingming,XU Tao.Critical Discharge Flow of Sand Cleaning Fluid Considering Transient Temperature Effect of Horizontal Well[J].Journal of Southwest Jiaotong University,2014,27(6):1123-1129. |
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| Authors: | LIU Qingyou WANG Xingming XU Tao |
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| Abstract: | Hydraulic sand cleaning operation of horizontal well in oil and gas fields is difficult because it is hard to obtain a reasonable discharge volumetric flow of the sand cleaning fluid (SCF) in practice. To solve this problem, an annular critical velocity model that is based on the transient thermal model of formation and wellbore during sand cleaning operation was proposed to recognize the SCF critical velocity in horizontal well. Taking into account the influence of transient temperature field on the SCF viscosity, the finite volume method (FVM) was used to obtain the transient thermal distribution, and the transient annulus critical velocity of the whole wellbore was calculated by solving the temperature-viscosity equation of the SCF. On this basis, a new method for calculating the critical discharge flow of SCF was then developed. As a case study, the critical velocities of four typical SCFs were calculated using the proposed method. The results show that the critical velocities of the four SCFs when considering the effect of temperature are 9.20%, 17.26%, 9.85%, and 7.64% respectively lager than that without considering the thermal effect; and the critical discharge flow are 8.33%, 18.18%, 10.00%, and 11.11% larger respectively. Therefore, temperature should be considered to optimize the critical velocity and discharge flow of SCFs in horizontal well. |
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