Profile control performance and field application of preformed particle gel in low-permeability fractured reservoir

Xu, Bin; Wang, Yan

doi:10.1007/s13202-020-01049-2

Cited by 8 publications

(6 citation statements)

References 17 publications

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“…The commonly used dissection agent preformed granular gels (PPGs), PPGs show good temperature and salt resistance and the expansion rate of PPGs is kept above 10 at a 70 • C or 130 • C (10,000 mg/L NaCl solution) temperature; however, PPG with larger particle size may have a greater blocking effect. It is difficult to achieve deep dissection, and the validity period during dissection is short [83]. For improvement of polymer mechanical performance based on temperature and salt resistance, Salunkhe et al [84] prepared a hydrogel (HT-PPGs) with ultra-high temperature tolerance.…”

Section: In Enhanced Oil Recoverymentioning

confidence: 99%

Application and Research Prospect of Functional Polymer Gels in Oil and Gas Drilling and Development Engineering

Bai

Yuan

Yang

et al. 2023

Gels

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Polymer gel materials are formed by physically crosslinking and chemically crosslinking to form a gel network system with high mechanical properties and reversible performance. Due to their excellent mechanical properties and intelligence, polymer gel materials are widely used in biomedical, tissue engineering, artificial intelligence, firefighting and other fields. Given the current research status of polymer gels at home and abroad and the current application status of oilfield drilling, this paper reviews the mechanism of polymer gels formed by physically crosslinking and chemically crosslinking, summarizes the performance characteristics and the mechanism of action of polymer gels formed by non-covalent bonding, such as hydrophobic bonding, hydrogen bonding, electrostatic and Van der Waals interactions interactions, and covalent bonding such as imine bonding, acylhydrazone bonding and Diels-Alder reaction. The current status and outlook of the application of polymer gels in drilling fluids, fracturing fluids and enhanced oil recovery are also introduced. We expand the application fields of polymer gel materials and promote the development of polymer gel materials in a more intelligent direction.

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Section: In Enhanced Oil Recoverymentioning

confidence: 99%

Application and Research Prospect of Functional Polymer Gels in Oil and Gas Drilling and Development Engineering

Bai

Yuan

Yang

et al. 2023

Gels

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“…Worldwide, major oil fields are generally in the middle and late stages of production, which means that the quality of crude oil tends to be heavier and poorer [1]. The salt and water content of crude oil has also increased due to the implementation of various measures to increase production [2][3][4]. A gradual increase in the salt content of crude oil can lead to numerous hazards during the subsequent processes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Mixing and Salt Washing Effects of a Static Mixer in an Electric Desalination Process

Liu,

Gao,

Huang

et al. 2024

Processes

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Electric desalination units in the crude oil refining process are becoming increasingly important with the growing trend towards heavy and poor crude oils. The oil–water mixing effect of the static mixer plays a crucial role in the electric desalination process. The present study investigated the effect of various variables, such as mixer type, number of mixing elements, washing water consumption, and oil viscosity and density on the oil–water mixing efficiency of a static mixer. In addition, this study also analyzed the effect of these variables on the salt washing process that occurs during mixing using a kinetic equation for the dissolution of inorganic salts. The results showed that the number of mixing elements was the most significant variable, followed by the amount of washing water injected. The density of the crude oil had a negligible effect. Based on these results, the use of four mixing elements in the SMX static mixer was recommended. The injection of washing water should be controlled at about 8%, while ensuring that the interfacial tension between oil and water remains below 0.01 N/m. Under these conditions, the salt washing efficiency reached 46.3%. This study provides a theoretical basis for designing static mixers and optimizing their operation in electric desalination processes.

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“…The formation of advantageous channels in deep reservoirs under conditions of long-term water flooding can result in inefficient and ineffective circulation, causing a decrease in oil production and a rapid rise in water cuts. Depth profile control technology is often used to improve the swept volume of injected liquid [ 1 , 2 , 3 ]. However, some oil fields have deep reservoirs and high temperatures are recorded [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Evaluation of a Temperature and Salt Resistant Hydrophobic Associative Weak Polymer Gel System

et al. 2023

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We targeted high-temperature and highly saline old oil fields, whose environmental conditions could be attributed to the significantly high heterogeneity cause by long-term water flooding. The Huabei Oilfield was chosen as the research object. We developed a hydrophobic functional monomer–polymer with temperature and salt resistance by introducing the temperature-resistant and salt-resistant monomer NVP and a hydrophobic functional monomer into the main chain for copolymerization. We used a crosslinking agent with phenolic resin to prepare a weak gel system that showed temperature and salt resistance and investigated its temperature and salt resistance, infective property, plugging performance, liquid flow ability, micropore throat migration, and plugging characteristics. The results obtained using the infrared spectroscopy technique revealed the successful preparation of the phenolic resin crosslinker. The weak gel exhibited good temperature and salt resistance when the polymer concentration was 2000 mg/L, the cohesion ratio was 1:1.5, the additive concentration was 2000 mg/L, the reservoir temperature was 120 °C, and the injected water salinity was 40,300.86 mg/L. The average viscosity retention rate of the 90-day weak gel reached more than 80% and its microstructure was examined. The coreflow experiment results revealed that the weak gel system was characterized by good infectivity. After plugging the weak gel, the effect on the direction of the liquid flow was evident and the flow rate of the low permeability layer increased to a maximum of 48.63% under conditions of varying permeability levels. A significant improvement in the water absorption profile was achieved. The plugging was carried out through a sand-filling pipe under varying permeability conditions and the pressure measuring points in the sand-filling pipe were sucessfully pressurized. The migration ability of the weak gel was good and the blocking rate was >85%.

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Profile control performance and field application of preformed particle gel in low-permeability fractured reservoir

Cited by 8 publications

References 17 publications

Application and Research Prospect of Functional Polymer Gels in Oil and Gas Drilling and Development Engineering

Application and Research Prospect of Functional Polymer Gels in Oil and Gas Drilling and Development Engineering

Numerical Simulation of the Mixing and Salt Washing Effects of a Static Mixer in an Electric Desalination Process

Preparation and Performance Evaluation of a Temperature and Salt Resistant Hydrophobic Associative Weak Polymer Gel System

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