Development and Application of Large Scale Visible Physical Simulation Device for Acid Fingering

doi:10.11885/j.issn.1674-5086.2015.09.29.30

Abstract

Abstract: In pad acid fracturing, low viscosity acid leads to a fingering phenomenon in the high viscosity pad fluid and has a great influence on the result of acid fracturing; judging from former studies, it can only be analyzed through simulation. However, present models differ significantly from the real acid fracturing process. In view of this, a large-scale physical visible acid fingering simulation device was designed and manufactured based on similarity criterions and similarity scales presented by the author. Compared with the physical acid fingering simulation devices of p_redecessors, this simulation device structure featured three plates and double slits capable of studying fingering behaviors under different viscosities, densities, and temperatures and performed acid rock reaction, acid fluid loss as well as low-and medium-pressure acid fingering visual simulation under different fracture inclinations. Simulations of acid fingering were performed, and it was found that acid fingering forms were so complex that quantitative description based on qualitative research was required to reveal the evolution rule.

Key words: fingering, large-scale, visible, experimental device, acid fracturing

CLC Number:

TE357

LI Xiaogang, SONG Rui, ZHANG Rusheng, YANG Zhaozhong, LIN Xin. Development and Application of Large Scale Visible Physical Simulation Device for Acid Fingering[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 153-162.

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