Preparation and Laboratory Evaluation of a New Type of Cross-Linking Agent for Acid Fracturing Fluid System

2011 ◽  
Vol 347-353 ◽  
pp. 995-1000
Author(s):  
Xiang Bo Wei ◽  
Xiao Rui Li ◽  
Xiao Jia Xue ◽  
Li Ding
Keyword(s):  
Zirconium Oxychloride ◽  
Laboratory Evaluation ◽  
Cross Linking ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Synthetic Process ◽  
Temperature Resistance ◽  
Acid Fracturing ◽  
Shearing Resistance ◽  
New Type

A type of zirconium-organic cross-linking agent with excellent temperature resistance and delaying performance was prepared for acid fracturing fluid system. The factors influencing on the synthetic process of the zirconium-organic cross-linking agent were investigated and the optimum condition was obtained: 5% zirconium oxychloride, 20% ligands, reaction temperature 50~55°C, reaction time 4.0~5.0h. Then the best technology for zirconium-organic cross-linking agent and the laboratory evaluation for the acid fracturing fluid system were studied. The results showed that using the cross-linking agent can obviously improve the temperature resistance, delaying performance and the shearing resistance of the acid fracturing fluid system. Meanwhile, the zirconium-organic cross-linking agent had excellent gelout performance and sand-carrying performance, which can satisfy the fracturing operation requirement for the reservoirs below 100°C.

Rheological Property of the Regenerable Polyhydroxy Alcohol Fracturing Fluid System

2014 ◽  
Vol 875-877 ◽  
pp. 1462-1466
Author(s):  
Xiao Rui Li ◽  
Xiao Jia Xue ◽  
Hua Bo Fan ◽  
Xiao Juan Lai ◽  
Lei Wang
Keyword(s):  
Rheological Property ◽  
Vinyl Alcohol ◽  
Ph Value ◽  
Poly Vinyl Alcohol ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Crosslinking Degree ◽  
Temperature Resistance ◽  
Shearing Resistance ◽  
First Time

According to the characteristic of polyhydroxy alcohol fracturing fluid system, the regeneration of the system was investigated for the first time. A stable organic boron crosslinking poly (vinyl alcohol) regenerable polyhydroxy alcohol fracturing fluid system was prepared, and the rheological property of the polyhydroxy alcohol fracturing fluid system with different regenerable times was also researched. The effect of regenerable times on the rheological property of the system was studied. The results indicated that the aims of gel breaking and regeneration can be achieved by regulating its pH value and controlling its crosslinking degree. With the increment of the regenerable time, both the temperature resistance and shearing resistance performances were decreased, and the viscoelasticity of the gel was also reduced.

scholarly journals A new type of experimentally proposed in situ heat/gas clean foam fracturing fluid system

2020 ◽  
Vol 10 (8) ◽  
pp. 3419-3436
Author(s):  
Kuangsheng Zhang ◽  
Zhenfeng Zhao ◽  
Meirong Tang ◽  
Wenbin Chen ◽  
Chengwang Wang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Pressure Coefficient ◽  
System Optimization ◽  
Inert Gas ◽  
Working Fluid ◽  
Fluid Loss ◽  
Fracturing Fluid ◽  
Fluid System ◽  
New Type

Abstract When cold fluid is injected into low-temperature, low-pressure, low-permeability reservoirs containing wax-bearing heavy oil, cryogenic paraffin deposition and heavy oil condensation will occur, thus damaging the formation. Moreover, the formation pressure coefficient is low and the working fluid flowback efficiency is low, which affects the fracturing stimulation effect. Therefore, an in situ heat/gas clean foam fracturing fluid system is proposed. This system can ensure that conventional fracturing fluid can create fractures and carry proppant in the reservoir, generate heat in situ to avoid cold damage, reduce the viscosity, and improve the fluidity of crude oil. The in situ heat fracturing fluid generates a large amount of inert gas while generating heat, thus forming foam-like fracturing fluid, reducing fluid loss, improving proppant-carrying performance, improving gel-breaking performance, effectively improving crack conductivity, and is clean and environmentally friendly. Based on the improved existing fracturing fluid system, in this paper, a new type of in situ heat fracturing fluid system is proposed, and a system optimization evaluation is conducted through laboratory experiments according to the performance evaluation standard of water-based fracturing fluid. Compared with the traditional in situ heat fracturing fluid system, the fracturing fluid system proposed in this study generates a large amount of inert gas and form foam-like fracturing fluid, reduces fluid loss, enhances the proppant-carrying capacity and gel-breaking performance, improves crack conductivity, the gel without residue and that the gel-breaking liquid is clean and harmless.

A New Acid Fracturing Fluid System for High Temperature Deep Well Carbonate Reservoir

2016 ◽  
Author(s):  
Ying Gao ◽  
Shengjiang Lian ◽  
Yang Shi ◽  
Xianyou Yang ◽  
Fujian Zhou ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbonate Reservoir ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Acid Fracturing ◽  
Deep Well

Laboratory Study and Evaluation on a Novel Clearfrac Fluid System

2012 ◽  
Vol 488-489 ◽  
pp. 133-136
Author(s):  
Shuang Fei Zhong ◽  
Fu Jian Liu ◽  
Dong Xu Li
Keyword(s):  
Hydraulic Fracturing ◽  
Oil And Gas ◽  
Water Injection ◽  
The Novel ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Effective Measure ◽  
Temperature Resistance ◽  
Well Production ◽  
Viscoelastic Surfactant

Hydraulic fracturing is an effective measure to recover the permeabilityof reservoir and important to enhance oil and gas well production and water injection well. Fracturing fluid is the key factor in the fracture treatments. At present, water-based fracturing fluids are popular, because of low costs and steady performance, which has the largest applications. However, it performs badly in residue. The novel developed clearfrac fluid system named CF1 has lowresidue, cost affectivity, prior temperature resistance properties. Evaluation through a series of lab experiments, the experiments result show that the novel clearfrac fluid system can satisfy with the requirement of low damage and have favorable temperature resistance under 120 。C. The damage to the core matrix due to with the broken frac-fluid is low. Prior properties of the novel clear-fracturing fluid are suitable to high temperature and high pressure reservoirs. It is also a novel environmental friendly viscoelastic surfactant fracturing fluid. The development of the novel clear-fracturing fluid for hydraulic fracturing industry is significant.

Research on the Synthesis and Characterization of a Novel Dendritic Thickening Agent

2014 ◽  
Vol 1028 ◽  
pp. 84-89
Author(s):  
Chao Wang ◽  
Jian Ouyang ◽  
Zhuo Yan Zhu ◽  
Gui Fu Duan ◽  
Feng Wang ◽  
...  
Keyword(s):  
Crosslinking Agent ◽  
Shear Resistance ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Temperature Resistance ◽  
Thickening Agent ◽  
Low Viscosity ◽  
Low Interfacial Tension ◽  
Resistance Performance

A novel dendritic thickening agent has been prepared on account of the poor temperature resistance performance and other shortcomings of conventional polymer thickening agent (HPAM), and has evaluated its monomer proportioning and the performance of formed fracturing fluid. Accordingly, it has derived that, when the concentration of the polar monomer AMPS and the functional monomer GL is 30% and 1%, respectively, this novel dendritic thickening agent is able to maintain the excellent temperature resistance and shear resistance of the fracturing fluid system at lower concentrations. The optimal formula of the formed fracturing fluid is: 0.4% thickening agent +0.15% pH adjusting agent +0.25% crosslinking agent +0.1% discharge aiding agent. Under the conditions of 170s-1and 150°C, it has tested its temperature resistance and shear resistance properties, and the final viscosity after shearing for 2h was 147.6 mPa.s. The gel breaking liquid is characterized by low viscosity, low surface tension, low interfacial tension, little residue content, and is conductive to the smooth flowback of the gel breaking liquid after fracturing construction. Compared with the conventional guanidine gum fracturing fluid system, this novel dendritic thickening agent fracturing fluid system has much lower residue content.

A Novel Fracturing Fluid System with Ultra-Low Concentration and High Temperature Resistant

2014 ◽  
Vol 624 ◽  
pp. 651-656
Author(s):  
Chao Wang ◽  
Jian Ouyang ◽  
Zhuo Yan Zhu
Keyword(s):  
High Temperature ◽  
Metal Ion ◽  
Ph Value ◽  
Low Cost ◽  
Cross Linking ◽  
Fluid Loss ◽  
Low Permeability ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Low Concentration

According to the low permeability reservoir, fracturing transformation has some requirements on fracturing fluid system with low cost, low damage, and high temperature resistant. First of all, we are able to begin from the concentration of thickener and cross-linking system and then see Synthesis of high temperature resistant polymers as thickening agent. In addition, Non metal ion compounds are introduced as cross-linking agent. Moreover, we will have a performance evaluation on the fracturing fluid system which has been formed, obtaining the best receipe with ultra low concentration and high temperature resistance (calculate according to the mass concentration ):0.075% thickener agent +0.015%pH value regulator +0.25% cross-linking agent +0.01% coagulant +0.4% cleanup agent. This fracturing fluid system has a lot of excellent characteristics such as low density, low cost, low residue, low fluid loss, no metal ion and so on . It also cuts down the use-cost of fracturing fluid and reduces the damage to the Stratum towards which fracturing fluid has. The favorable Cross-linking system fill the gap that we use the non metal ion as cross-linking agent in our present fracturing fluid system at home and abroad.

scholarly journals A new type of high density fracturing fluid system

2019 ◽  
Vol 371 ◽  
pp. 052045
Author(s):  
Yuebin Gao ◽  
Bo Cai ◽  
Jinping Qiu ◽  
Chunming He ◽  
Guifu Duan ◽  
...  
Keyword(s):  
High Density ◽  
Fracturing Fluid ◽  
Fluid System ◽  
New Type

Research and Development of Self-Lubricating Bearing Materials

2013 ◽  
Vol 651 ◽  
pp. 198-203
Author(s):  
Xiu Ling Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang
Keyword(s):  
High Temperature ◽  
Research And Development ◽  
Metal Matrix ◽  
Future Trend ◽  
Al Alloy ◽  
Temperature Resistance ◽  
The Future ◽  
High Temperature Resistance ◽  
Bearing Materials ◽  
New Type

It is significant and necessary to carry out the research and development of self-lubricating bearing. The current study of metal matrix self-lubricating bearing materials is summarized. A new type of high temperature self-lubricating Ti-Al alloy bearing materials is proposed. It is light, anti-friction, anti-corrosion and high temperature resistance (600 °C). The future trend is introduced in the end of this paper.

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