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Volume 27 Issue 6
Dec.  2014
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Journal of Southwest Jiaotong University  > 2014  >  27(6): 1123-1129.
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. doi: 10.3969/j.issn.0258-2724.2014.06.028
Citation: 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. doi: 10.3969/j.issn.0258-2724.2014.06.028
shu

Critical Discharge Flow of Sand Cleaning Fluid Considering Transient Temperature Effect of Horizontal Well

doi: 10.3969/j.issn.0258-2724.2014.06.028
  • Received Date: 10 Mar 2014
  • Publish Date: 25 Dec 2014
    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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