一种新型自支撑压裂液体系实验研究

doi:10.13809/j.cnki.cn32-1825/te.2020.02.021

Abstract

Abstract:

Hydraulic fracturing is an important technical means for stimulation and transformation of oil and gas reservoirs, and has been widely used in the production of major oil fields at home and abroad. After studying a large number of literature research on the fracturing fluid system, it is found that various improvements of the current fracturing fluid system are mainly around “carrying sand”. However, in this paper, a new type of self-supporting fracturing fluid system is innovatively put forward, which completely gets rid of the concept of "carrying sand". In the process of fracturing fluid pumping, there is no solid proppant at all, but the fracturing fluid is combined with the proppant as a whole. When the fluid reaches the target layer, it is affected by the formation temperature and transformed from liquid phase to solid-state to prop up the fracturing fractures. The obtained self-supporting fracturing fluid system can form supporting solids with certain sphericity and strength at 85 ℃ and in 30 minutes. The upper limit of liquid system viscosity is 45.58 mPa·s, bringing the system good injectivity and stability. The density of the solid-state proppant is 1.07 g/cm³, the separation coefficient is 1.41, the main particle size range is 20~40 and 40~70 mesh, and the crushing rate is 4.7 % and 8.75 %, respectively.

Key words: hydraulic fracturing, fracturing fluid, proppants, self-propping, phase change

CLC Number:

TE357

Liqiang ZHAO,Yinxin CHEN,Pingli LIU, et al. Experimental study on a new type of self-propping fracturing fluid[J]. Reservoir Evaluation and Development, 2020, 10(2): 121-127.

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测试项目	目数/目	闭合压力/MPa	破碎率/%
抗破碎测试压力及指标	20~40	69	≤5
抗破碎测试压力及指标	40~70	86	≤10
材料破碎率测试	20~40	69	4.70
材料破碎率测试	40~70	86	8.75

Experimental study on a new type of self-propping fracturing fluid

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