Treatment and recycling of acidic fracturing flowback fluid

Chen, Fu; Wang, Kuntai; Luo, Min; Bu, Tao; Yuan, Xin; Du, Guoyong; Wu, Hongjun

doi:10.1080/09593330.2021.1876171

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…Reusable, environmentally friendly fracturing fluids can be directly used for liquid preparation after simple treatments, such as filtration and sedimentation, after they return to the ground. The reuse treatment of nonrecyclable fracturing flowback fluid is more complex and requires sterilization, sedimentation to remove mechanical impurities, chemical precipitation to remove high-valent metal ions, and supplement loss additives. − Studies of environmentally friendly fracturing fluids have focused on their reusability and green environmental protection. Considering the large consumption of water resources, waterless and less hydraulic fracturing technologies should be developed in the future.…”

Section: Hydraulic Fracturingmentioning

confidence: 99%

Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

Liang

2023

Energy Fuels

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The energy crisis has intensified in recent years. The current global economic environment and increasing cost of mining necessitate additional energy access channels. Previous studies have shown that natural gas hydrate reservoirs (NGHRs) contain a large number of natural gas resources. However, several problems are associated with the safe and efficient exploitation of the NGHRs. Reservoir stimulation technology is expected to address these issues. This study introduces the properties and mining difficulties of NGHRs and reviews their stimulation scheme and related research progress based on three perspectives: hydraulic fracturing, burden sealing, and near-well reconstruction. The principles, advantages, and limitations of the three schemes are compared. In addition to the stimulation effects of the three aforementioned methods, this study focused on the fracability of NGHRs, the factors influencing fracture initiation and development, and the fracturing fluid, proppant, completion fluid, and slurry suitable for NGHR stimulation. In addition, the principles, current challenges, and future research prospects for reservoir stimulation are summarized to provide a reference for the commercial exploitation of natural gas hydrates in the future.

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Section: Hydraulic Fracturingmentioning

confidence: 99%

Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

Liang

2023

Energy Fuels

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“…Among them, fracturing stimulation technology has become the main measure for the production of such oil and gas fields. The wastewater produced after oilfield fracturing operations has the characteristics of high turbidity, high viscosity, and high chemical oxygen demand (COD), which is the most difficult wastewater in oilfield wastewater treatment [ 4 , 5 , 6 , 7 ]. This kind of wastewater is large and highly dispersed, and if not treated effectively, it will cause serious pollution to the environment.…”

Section: Introductionmentioning

confidence: 99%

AgIn5S8/g-C3N4 Composite Photocatalyst Coupled with Low-Temperature Plasma-Enhanced Degradation of Hydroxypropyl-Guar-Simulated Oilfield Wastewater

Li,

Zhang,

Wang

et al. 2024

Molecules

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The effective treatment and recovery of fracturing wastewater has always been one of the difficult problems to be solved in oilfield wastewater treatment. Accordingly, in this paper, photocatalytic-coupled low-temperature plasma technology was used to degrade the simulated wastewater containing hydroxypropyl guar, the main component of fracturing fluid. Results indicated that hydroxypropyl-guar wastewater could be degraded to a certain extent by either photocatalytic technology or plasma technology; the chemical oxygen demand and viscosity of the treated wastewater under two single-technique optimal conditions were 781 mg·L−1, 0.79 mPa·s−1 and 1296 mg·L−1, 1.01 mPa·s−1, respectively. Furthermore, the effective coupling of AgIn5S8/gC3N4 photocatalysis and dielectric-barrier discharge–low-temperature plasma not only enhanced the degradation degree of hydroxypropyl guar but also improved its degradation efficiency. Under the optimal conditions of coupling treatment, the hydroxypropyl-guar wastewater achieved the effect of a single treatment within 6 min, and the chemical oxygen demand and viscosity of the treated wastewater reduced to below 490 mg·L−1 and 0.65 mPa·s−1, respectively. In the process of coupled treatment, the AgIn5S8/gC3N4 could directly absorb the light and strong electric field generated by the system discharge and play an important role in the photocatalytic degradation, thus effectively improving the energy utilization rate of the discharge system and enhancing the degradation efficiency of hydroxypropyl guar.

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Coupling iron-carbon micro-electrolysis with persulfate advanced oxidation for hydraulic fracturing return fluid treatment

et al. 2023

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Treatment and recycling of acidic fracturing flowback fluid

Cited by 4 publications

References 24 publications

Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

AgIn5S8/g-C3N4 Composite Photocatalyst Coupled with Low-Temperature Plasma-Enhanced Degradation of Hydroxypropyl-Guar-Simulated Oilfield Wastewater

Coupling iron-carbon micro-electrolysis with persulfate advanced oxidation for hydraulic fracturing return fluid treatment

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