Improved fracturing fluid using: Organic amino boron composite crosslinker with BN covalent bond

Zhang, Zhaoyang; Mao, Jincheng; Zhang, Yang; Han, Tianxing; Yang, Bo; Xiao, Wei

doi:10.1002/app.47675

Cited by 9 publications

(4 citation statements)

References 21 publications

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“…However, the shear viscosity of the zirconium lactate crosslinker purchased from the market is only 88 mPa·s under the same conditions, and proved the synthetic crosslinker has good temperature and shear resistance. In addition, compared with the boron crosslinkers in the literature, the temperature resistance and shear resistance are better 30 …”

Section: Resultsmentioning

confidence: 99%

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Preparation and laboratory study of a sodium carboxymethyl cellulose smart temperature‐controlled crosslinked gel fracturing fluid system

Zhu

et al. 2023

J of Applied Polymer Sci

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Water‐based fracturing fluids are widely used in the development of tight, low‐permeability unconventional oil and gas fields, where the crosslinking agent component can thicken the low‐viscosity, high‐flowability base fluid to ensure sufficient proppant is transported from the wellbore to the tip of the fracture and generate the required net pressure to support the fracture. Zirconium crosslinking agents are widely used due to their good stability and high shear resistance. In the paper, glycerin, zirconium chloride, lactic acid, sodium hydroxide, and water were reacted at a molar ratio of 7:1:3:4:98 and a temperature of 80°C for 5 h; Using triethanolamine, zirconium chloride, lactic acid, and water as raw materials, the molar ratio of 4:1:3:98, reaction at 80°C for 5 h, and then zirconium lactate crosslinker and triethanolamine zirconium lactate crosslinker were synthesized respectively, which were incorporated into a newly designed self‐generating acid temperature‐controlled crosslinking system to crosslink salt‐resistant cleaning fracturing fluids mainly composed of sodium carboxymethyl cellulose, achieving delayed crosslinking of the fracturing fluid in different temperature formations. The strong crosslinking temperature range of glycerol‐lactic acid zirconium and the rheological properties of triethanolamine zirconium lactate gel and zirconium lactate gel in the system were tested. The viscosity of triethanolamine zirconium lactate gel and zirconium lactate gel were 88.86 and 94.69 mPa·s, respectively, at the shear rate of 300 s−1, and the viscosity remained above 200 mPa·s at the shear rate of 170 s−1, 60°C for 1 h. These figures far exceed the gels formed by commercially purchased zirconate. This system can make glycerol lactic achouid zirconium crosslinking agents undergo strong crosslinking at 40–65°C and triethanolamine lactic acid zirconium undergo strong crosslinking at 55–75°C. It has significant implications for the delayed crosslinking effect of massive fracturing operations.

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Section: Resultsmentioning

confidence: 99%

“…In addition, compared with the boron crosslinkers in the literature, the temperature resistance and shear resistance are better. 30…”

Section: Temperature and Shear Resistancementioning

confidence: 99%

Preparation and laboratory study of a sodium carboxymethyl cellulose smart temperature‐controlled crosslinked gel fracturing fluid system

Zhu

et al. 2023

J of Applied Polymer Sci

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“…Such results proved that PB caused less damage than boric acid. Zhang et al 17 prepared an organic amine boron composite (ABC‐1) crosslinker by adding triethylenetetramine to the traditional organic boron crosslinker with alcohols as ligands. The introduction of BN could obtain a more dense and complex network structure, and its temperature resistance was significantly improved compared with the traditional organic boron crosslinker.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and performance evaluation of crosslinker for seawater‐based fracturing fluid

Miao

Hai

et al. 2022

J of Applied Polymer Sci

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Zirconium is one of the most commonly used crosslinkers for guar gum‐based fracturing fluid. Nevertheless, it is difficult for zirconium crosslinkers applied in fracturing to possess both high temperature resistance and adjustable crosslinking time. Meanwhile, few people did systematical research on the crosslinking process of fracturing fluid. In this study, an organic zirconium crosslinker with high temperature resistance and controllable crosslinking time was synthesized. The seawater‐based fracturing fluid gel prepared with the crosslinker could perform well under 170°C. Oscillatory shear experiments were conducted to analyze the rheology of the gelation process. Moreover, steady‐state shear and micro‐rheological tests were conducted to analyze the dynamic and static crosslinking process of the fracturing fluid, respectively. Meanwhile, rheo‐kinetic equation was used to fit the data and the effects that various factors had on the gelation process were illustrated thoroughly. This study not only prepared an organic zirconium crosslinker with good performances, but also explored the crosslinking process of fracturing fluid gel, which could improve its further application in oilfields.

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“…2005), and they all have their own advantages and disadvantages. For example, organic boron crosslinker is cheap but has poor temperature resistance (Chen et al 2017a;Chaib et al 2021), and organometallic crosslinkers (Zhang et al 2019(Zhang et al , 2013 have good temperature resistance but poor shear resistance and hard-to-break. Generally speaking, the temperature resistance of fracturing fluid with hydroxypropyl guar gum as thickener is less than 140 °C, so in order to continue to use the low-cost thickener-hydroxypropyl guar gum, it is important to develop a new crosslinker with better temperature resistance and easily breaking to adapt to the exploitation of deeper oil and gas resources.…”

Section: Introductionmentioning

confidence: 99%

Study on gelation, temperature resistance and micromorphology of modified nano-ZrO2 crosslinked hydroxypropyl guar gum

Yang

Chen

Zhu

et al. 2021

J Petrol Explor Prod Technol

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In order to improve the temperature and shear resistance of fracturing fluid, a kind of nano-zirconium-boron crosslinker, which is different from the traditional zicral-boron crosslinker, is prepared using 4wt% borax, 50 v/v% glycerol, 8 v/v% triethanolamine and 40 v/v % acetylacetone as raw materials, and its chemical structure is characterized of by infrared spectroscopy and its performance, such as viscoelasticity, temperature and shear resistance and gel breaking property, have also been evaluated. The results show that firstly the elastic modulus of the fracturing system is much larger than the viscous modulus at frequency of 0.1–10 Hz, indicating that the fluid is a typical structural fluid. Secondly the fracture fluid crosslinked by nano-zirconium-boron crosslinker is sheared at 180 °C, 170 s−1 for 2 h, and the viscosity is maintained above 60 mPa.s. Finally viscoelasticity, gel breaking property and damage evaluation also meet the requirements of national standard code for Chinese. Analysis of the temperature resistance mechanism of the HPG fracturing fluid crosslinked by nano-zirconium-boron crosslinker shows that its connecting lines are thicker and stronger to make the fracturing fluid have better temperature and shear resistance.

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Improved fracturing fluid using: Organic amino boron composite crosslinker with BN covalent bond

Cited by 9 publications

References 21 publications

Preparation and laboratory study of a sodium carboxymethyl cellulose smart temperature‐controlled crosslinked gel fracturing fluid system

Preparation and laboratory study of a sodium carboxymethyl cellulose smart temperature‐controlled crosslinked gel fracturing fluid system

Synthesis and performance evaluation of crosslinker for seawater‐based fracturing fluid

Study on gelation, temperature resistance and micromorphology of modified nano-ZrO2 crosslinked hydroxypropyl guar gum

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