Abstract In order to explore the influence of micropore structure tight sandstone reservoir in water driving characteristics, studies on Chang 6 middle-western part Ordos Basin are carried out by various experiments such as cast-thin section analysis, scanning electron microscopy, high-pressure mercury injection and micro-water driving. The result shows that permeability contribution curves sam...

Carbonate reservoir rocks of different pore structure have quite distinct and detectable 4D seismic signatures. Using three defined pore structure types (PST), these seismic signatures are correlated with the permeability patterns of carbonate rocks. In both the high-permeability PST3 and intermediate-permeability PST2 regions, gas injection is preferred than water injection for effective 4D se...

We theoretically studied how to directly engineer the constitutive parameters of metamaterials for perfect absorbers of electromagnetic waves. As an example, we numerically investigated the necessary refractive index n and extinction coefficient k and the relative permittivity ε and permeability μ of a metamaterial anti-reflection layer, which could cancel the reflection from a hydrogenated amo...

The study area is an oil and gas field that has a low resistivity reservoir zone in the Talang AkarFormation, South Sumatera Basin. composed of siltstone sandstone was depositedin shallow to transitional marine environment. aim this identify determine potential oflow reservoirs formation. data used include well log, mud core data(porosity, permeability, petrography), formation water analysis, b...

results gelatin films exhibited good tensile strength and elongation at break, water solubility, swelling, and water vapor permeability. incorporation of tam into the gelatin films caused a significant decrease in tensile strength and swelling, and a significant increase in elongation at break, water solubility, water vapor permeability and whiteness of the films. gelatin films exhibited low an...

Industrial membranes comprised of a thin selective layer (<100 nm) requires a gutter layer (<100 nm) between the selective layer and the porous support to achieve high permeance for gas separation. The gutter layer materials must be carefully chosen to enhance overall membrane performance, i.e., high permeance and high selectivity. However, the experimental determination of the optimum gutter l...

A new numerical model for low-permeability reservoirs is developed. The incorporates the nonlinear characteristics of oil-water two-phase flows while taking into account initiation pressure gradient. Related solutions are obtained using a finite difference method. correctness method demonstrated two-dimensional inhomogeneous low permeability example. Then, differences in cumulative oil and wate...

cu(in,ga)se2 thin films (cigs) on metallic substrate (titanium, molybdenum, aluminum, stainless steel) were prepared by a two-step selenization of co-evaporated metallic precursors in se-containing environment under n2 gas flow. structural properties of prepared thin film were studied. to characterize the optical quality and intrinsic defect nature low-temperature photoluminescence, were perfor...

In the process of water injection development in low-permeability and extra-low-permeability oil fields, absorption capacity wells continues to decline, number under-injection is increasing, which affects effect fields. this paper, we take X oilfield as an example carry out single-well pressurized tests determine range reasonable pressure for geological conditions suitable injection. Through pr...