Nanofluids have broad prospects in enhancing the oil recovery of reservoirs with low porosity, permeability, high capillary pressure and recovery. However, modification effects nanofluids on tight glutenite remain unknown. In this paper, different proportions silica nanoparticles sodium dodecyl sulfate were prepared characterized by zeta potential particle size distribution. Then, interfacial t...

Permeability can be directly measured using cores taken from the reservoir in the laboratory. Due to high cost associated with coring, cores are available in a limited number of wells in a field. Many empirical models, statistical methods, and intelligent techniques were suggested to predict permeability in un-cored wells from easy-to-obtain and frequent data such as wireline logs. The main obj...

Most fractured carbonate reservoirs are characterized by a highly permeable fracture zone surrounded low-permeability oil-wet matrix. These features make the displacement of oil from matrix into almost impossible during water flooding. This paper presents results flooding with polymer polyacrylamide (PAM) and biopolymer xanthan gum (XG) in combination biosurfactant to enhance imbibition rocks. ...

BACKGROUND Microalbuminuria, a powerful predictor of cardiovascular events, is thought to reflect widespread subclinical vascular abnormalities. To explore the pathogenesis of increased urinary albumin excretion in primary hypertension we evaluated systemic capillary permeability and ambulatory blood pressure (BP) measurement in two groups of matched untreated patients with (n = 11) and without...

Subsurface two-phase flow in porous media often takes place in reservoirs with a high ratio between the associated lateral and vertical extent and the lateral and vertical flow time scales. This allows for a two-scale approach with effective quantities for two-dimensional horizontal flow equations obtained from reconstructed hydrostatic vertical pressure and saturation distributions. Here, we d...

This paper describes the application of a new methodology to estimate permeability of clastic rock formations based on the numerical simulation of the physics of mudfiltrate invasion. The methodology assumes a key well with a complete suite of well logs and rock-core laboratory measurements of porosity, permeability, capillary pressure, and relative permeability. For additional wells in the sam...

Permeability is arguably the most important property in evaluating fluid flow in the reservoir. It is also one of the most difficult parameters to measure in field. One of the main techniques for determining permeability is the application of Nuclear Magnetic Resonance (NMR) logging across the borehole. However, available correlations in literature for estimating permeability from NMR data do n...

CO2 flooding process as a common enhanced oil recovery method may suffer from interface instability due to fingering and gravity override, therefore, in this study a method to improve the performance of CO2 flooding through an integrated ultraosund-CO2 flooding process is presented. Ultrasonic waves can deliver energy from a generator to oil and affect its properties such as internal energy and...

The effects of metabolic coronary vasodilation on transcapillary exchange in the heart were examined in anesthetized dogs by use of the multiple indicator dilution technique. Animals were studied under basal conditions and during coronary sinus pacing. To obviate adrenal medullary stimulation, catheters were placed in coronary artery and coronary sinus in a closed chest preparation. Plasma cate...