Experimental and modelling studies on static sag of solid weighting powders in Polysulfonate workover fluids at high temperature and high pressure
February 2025
The solid weighting material in a high-density workover fluid is prone to static sag. Existing experimental methods cannot predict the parameters of the settling stability of workover fluids at high...
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Synergistic enhancement of oil recovery: Integrating anionic-nonionic surfactant mixtures, SiO2 nanoparticles, and polymer solutions for optimized crude oil extraction
February 2025
Enhanced oil recovery (EOR) methods are essential for optimizing oil extraction from modern reservoirs. This research delved into the synergistic impact of combining anionic and nonionic surfactant...
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Dynamical counterfactual inference under time-series model for waterflooding oilfield
February 2025
The performances of numerical simulation and machine learning in production forecasting are severely dependent on precise geological modeling and high-quality history matching. To address these challenges,...
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Intelligent optimization of fracturing stage and cluster parameters for tight oil reservoir
February 2025
The Mahu oilfield in the Junggar Basin of Xinjiang has the characteristics of poor reservoir quality, large horizontal stress difference, and strong heterogeneity, which poses challenges in oil production...
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Discussion of the feasibility of spontaneous ignition, oil requirement, and air requirement for air injection in shale and tight reservoirs
February 2025
Because of the nature of low permeability of shale and tight reservoirs, a gas injection method has the advantage of enhancing oil recovery. Among gases, air has its vast and free resources. And one...
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Effect of potential determining ions on sulfonated polyacrylamide behavior during smart water-polymer injection into carbonate reservoirs
February 2025
In low salinity polymer flooding (LSPF), an advanced hybrid method for enhanced oil recovery (EOR), less attention has been given to the impacts of potential determining ions on polymer behavior in...
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Untreatment reutilization of high-salinity flowback fluid and produced water to prepare fracturing fluid by using associative thickener
February 2025
Reutilizing flowback fluid and produced water to prepare fracturing fluid is still an urgent problem that needs to be solved and is not well solved. In this work, an anti-salt associative thickener...
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Low-temperature oxidation characteristics and reaction pathways of crude oil within tight shale during air injection
February 2025
The investigation of low-temperature oxidation (LTO) of crude oil within tight shale holds significant importance due to its implications for subsequent oxidation reactions and enhanced oil recovery...
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Evolution law of stress induced by pressure depletion in fractured shale reservoirs: Implications for subsequent refracturing and infill well development
February 2025
Stress changes associated with reservoir depletion have been frequently observed. Stress evolution within and around the drainage areas can affect the completion of infill wells and refracturing considerably....
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The rock cutting simulation of heterogeneous granite using FDEM method
February 2025
Many advanced rock breaking methods are emerged form improving the ROP in deep formation drilling in recent years, such as electric pulse rock breaking, ultrasonic rock breaking and hydraulic rock breaking....
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Drilling dynamics measurement of drilling motors and its application in recognition of motor operation states through machine learning
December 2024
Drilling motors are widely used in unconventional oil and gas exploration. Due to the increased non-productive time and drilling costs brought about by accidental damage to drilling motors, predictive...
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Estimation of SARA composition of crudes purely from density and viscosity using machine learning based models
December 2024
Accurate characterization of crude oils by determining the composition of saturates, aromatics, resins and asphaltenes (SARA) has always been a challenging task in the petroleum industry. However, conventional...
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Nanoparticle-stabilized CO2 foam flooding for enhanced heavy oil recovery: A micro-optical analysis
December 2024
Surfactant flooding is a well-known chemical approach for enhancing oil recovery. Surfactant flooding has the disadvantage that it cannot withstand the harsh reservoir conditions. Improvements in oil...
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Multiphase flow challenges in drilling, completions, and injection: Part 2
December 2024
This review addresses the diverse applications of multiphase flows, focusing on drilling, completions, and injection activities in the oil and gas industry. Identifying contemporary challenges and suggesting...
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Multiphase flow challenges in drilling, completions, and injection: Part 1
December 2024
This review addresses the diverse applications of multiphase flows, focusing on drilling, completions, and injection activities in the oil and gas industry. Identifying contemporary challenges and suggesting...
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Effect of monovalent/divalent ions and SiO2-based nanocomposite dosage on thermochemical stability of HPAM polymeric solutions
December 2024
This study evaluated the effect of monovalent and divalent ions and the dosage of a SiO2-based nanocomposite on the thermochemical stability of HPAM polymeric solution. Chelating amine–functionalized...
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Numerical investigation of proppant transportation characteristics in hydraulically fractured wedge fractures
December 2024
Hydraulic fracturing creates multiple induced fractures and micro-fractures, forming a complex fracture network in the reservoir. The study of the transport and distribution of the proppant within the...
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Using ultrasonic and microwave to prevent and reduce wax deposition in oil production
December 2024
Wax deposition in oil and gas pipelines and equipment is a fundamental challenge that can lead to a decrease in the performance and useful life of these systems. To address this issue, various methods...
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Study on the mechanism of gas-water two-phase flow in carbonate reservoirs at pore scale
December 2024
Carbonate gas reservoirs generally contain water, leading to uneven water invasion, explosive water flooding and other prominent phenomena, which is an important factor restricting the efficient development...
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On how water injection may induce fault reactivation and slippage: A numerical method
December 2024
During the water injection process in oil fields, the original stress equilibrium of faults might be disrupted by the large influx of fluids into the reservoir, resulting in movements. Fault slip may...
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Active control of the fluid pulse based on the FxLMS
December 2024
In petroleum engineering, the performance of drilling fluid is the key factor affecting the drilling success. Drilling fluid rheology can be measured by tube measurement. Fluid pulsation will cause...
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Research on corrosion defect identification and risk assessment of well control equipment based on a machine learning algorithm
December 2024
In recent years, the risk assessment of well control equipment has faced some problems, such as shallow defect detection depth, large identification error of corrosion defect type, inaccurate equipment...
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Novel phase field model of hydraulic fracture propagation in poroelastic media and numerical investigation of interaction between hydraulic fracture and natural fracture
December 2024
A novel numerical model is established to study the hydraulic fracture extend in poroelastic media with natural fractures based on the phase field method. In this new model, the poroelasticity parameter...
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Integrated reservoir characterization of the Permo-Triassic gas reservoirs in the Central Persian Gulf
December 2024
The upper Dalan and Kangan or Permian-Triassic carbonate formations in the central the Persian Gulf are considered as world's giant gas reservoirs. The primary purpose of this research is to model and...
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Inhibition of carbon steel corrosion in CO2-saturated 3.5 wt.% NaCl solution by vanillin chitosan oligosaccharide and synergistic effect of KI additive
December 2024
The chitosan oligosaccharide and vanillin are used as raw materials to synthesize non-toxic and water-soluble chitosan oligosaccharide derivative called vanillin chitosan oligosaccharide as a green...
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