The efficiency of trapping an on-axis spherical particle by use of laser tweezers for a particle size from the Rayleigh limit to the ray optics limit is calculated from generalized Lorenz-Mie light-scattering theory and the localized version of a Gaussian beam that has been truncated and focused by a high-numerical-aperture lens and that possesses spherical aberration as a result of its transmi...

This research study focuses on the use of tools for well X05-NC169a in (X field) Libya. Tools such as reservoir saturation tool and repeat formation used this study. F3-Sand Stone is main has a gross thickness ranging from 130 to 187 feet. The aim identify type fluid determine contacts F3 - Sand Reservoir. was based petro-physical evaluation by using log data (Gamma Ray Log, Resistivity Neutron...

porous hollow glass microspheres have many uses, including encapsulation of active materials. in this paper a fast and facile method for fabricating porous hollow glass-microspheres was demonstrated by etching them using dilute hydrofluoric acid. then, a highly reactive amine was infiltrated into the etched glass microspheres. scanning electron microscopy was conducted for the hollow glass micr...

Nickel silicide (NiSi) nanowires with different linewidth (from 1000 to 32 nm) are formed in pre-patterned SiO2 trenches on a silicon substrate. SiO2 trenches are milled by focused ion beam (FIB) etching, and an electrical endpoint detection technique is used to control the FIB milling depth to just reveal the silicon surface. The formation is based on Ni thin film deposition and the subsequent...

Macrodispersion coefficients are derived for heterogeneous porous media under ergodic and nonergodic conditions. Influences of the log-conductivity autocovariance function on macrodispersion are investigated through six commonly used isotropic log-conductivity autocorrelation models. They are the exponential, Gaussian, spherical, linear, Whittle and Mizell A-type models. Analytical expressions ...

Abstract Seismic inversion is a geophysical technique used to estimate subsurface rock properties from seismic reflection data. data has band-limited nature and contains generally 10–80 Hz frequency hence combines well log information along with extract high-resolution acoustic impedance which low as high frequencies. This property qualitative quantitative of that can be analyzed enhance geolog...

fracture system in carbonate reservoirs is very complex. understanding the features of fractures such as dip, strike and the other parameters can help to distinguish the behaviour of reservoir in any exploration and production plan. image log is the best way to investigate feature planes like fracture and bedding. image log in one of drilled well #10x393 of bangestan reservoir in gachsaran oilf...

different methods exist for the zonation of oil reservoirs based on petrophysical data and well logs. among them are: permeability-porosity cross polt, pickett and soder and gill methods. in this study a statistical zonation technique has been used for the marun and pazanan oil reservoirs in iran based on effective porosity, density, sonic, neutron and resistivity data. petrophysical interpreta...

BACKGROUND Micro-needles were proposed as one of the alternatives to deliver drugs painlessly passing through stratum corneum in recent years. In this work, a mathematical model is presented to characterize the in fusion flow of a hollow micro-needle array driven by a micro-pump. METHODS By assuming the injection of each micro-needle undergoes a spherical expansion and diffusion, the model is...