A Novel Fracturing Fluid with High-Temperature Resistance for Ultra-Deep Reservoirs  

作　　者：Lian Liu Liang Li Kebo Jiao Junwei Fang Yun Luo 

机构地区：[1]Northwest Oilfield Branch,China Petroleum&Chemical Corporation,Urumqi,830011,China [2]Sinopec Key Laboratory for Enhanced Recovery in Fractured and Cavernous Reservoir,Urumqi,830011,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第5期975-987,共13页流体力学与材料加工（英文）

摘　　要：Ultra-deep reservoirs play an important role at present in fossil energy exploitation.Due to the related high temperature,high pressure,and high formation fracture pressure,however,methods for oil well stimulation do not produce satisfactory results when conventional fracturing fluids with a low pumping rate are used.In response to the above problem,a fracturing fluid with a density of 1.2~1.4 g/cm^(3)was developed by using Potassium formatted,hydroxypropyl guanidine gum and zirconium crosslinking agents.The fracturing fluid was tested and its ability to maintain a viscosity of 100 mPa.s over more than 60 min was verified under a shear rate of 1701/s and at a temperature of 175℃.This fluid has good sand-carrying performances,a low viscosity after breaking the rubber,and the residue content is less than 200 mg/L.Compared with ordinary reconstruction fluid,it can increase the density by 30%~40%and reduce the wellhead pressure of 8000 m level reconstruction wells.Moreover,the new fracturing fluid can significantly mitigate safety risks.

关 键 词：Ultra-deep reservoir high-temperature resistance weighted fracturing fluid guanidine gum potassium formatted 

分 类 号：TE3[石油与天然气工程—油气田开发工程]