porosity

Porosity is usually derived from the sonic or density, with the proper matrix and fluid parameters for the formations to be encountered.

The paleosol with less porosity did not develop well in water bearing space and was prone to form a water-resisting layer.

drainage occurs in a surface soil layer, with limited thickness and with high hydraulic conductivity due to its macro porosity.

Salt rock is considered to be the best media due to its characteristics of good rheological, low porosity, and low permeability etc.

The results show that the variation law of waste degradation is coincident with the total stress and porosity of landfill waste.

If available in real time during logging, the neutron-density crossplot porosity should be used for the best estimate of porosity.

If the porosity is not uniform, the router might have trouble finishing if cells with low porosity are placed near each other.

A multiparameter model of calculating the filtration rate of fracturing fluid in dual porosity media is set up in the paper.

Reticulated porous ceramic was a new non-mental material, which had 70%-95% open porosity and three-dimension solid net like framework.

An approach to uniform the porosity on fluidized bed layer is used for ensuring asbestos as a fibre ore to be fluidized normally.

If the effective porosity is given, the reflection coefficient of a solitary wave decreases also as the permeability coefficient increases.

Laser treatment of the sprayed coating can reduce the surface porosity of the coating.

For intergranular materials, poorly to moderately well cemented, the total porosity is approximately equal to the effective porosity.

Porosity is often found when using low-hydrogen electrodes such as E-7018, and it may be difficult to establish why this occurs.

This model can indicate the quantitative relationship among the resistivity, material's composition, metal percentage and porosity, etc.

Aerogels servers as a super thermal insulation material mainly due to its high nano-porosity and low thermal conductivity.

particles with a high porosity and a high surface area exhibit excellent antimicrobial efficacy at low dosage.

A porous film with highly uniform small pores and a desired porosity profile can be obtained with this method.

But it's easy to make linear porosity in welding.

The center axis of the part has inclusion defects as well as porosity and thus is suitable only for parts where this can be machined away.

By numerical simulation, the optimal value of the plenum chamber height, the ejector slot height and the wall porosity have been found.

Rocks having original porosity are more uniform in their characteristics than those rocks in which a large part of the porosity is induced.

The porous nature of the saprolite is directly related to the high porosity of Andisols in this study area.

Once roller compaction is completed for each layer, apply rapid test of the density and porosity with a nuclear densimeter . . .

Cavernous porosity can take the equidimensional form of vugs or follow channels , but the void dimensions are measurable in meters .

In the tight Upper Triassic sandstone with low porosity and permeability, the distributary channel sand body would be the beneficial target.

The proposed rate is to be paint coated surface conditions (smoothness and porosity) and the specific paint used joint decision.

Correlative test data show that this model has good applicability, and can reflect the development of the porosity under certain condition.

Correlation coefficients between the thermal conductivity and bulk density, open porosity, permeability a. . .

The stiff slope area was a place for the better quality reservoir with middle porosity and permeability.

An application experimental study of NMR logging in Tahe ultra-low porosity and low permeability reservoirs in Xinjiang is conducted.

Porosity: The degree of openness between the fibres of a paper. It is significant to air and ink penetration.

NMR is a technique used to determine the porosity and permeability of rock formations .

Conclusion: with one-step-granulating we could get the granules with much larger porosity to raise the rate of dissolution.

The results show that the optimum technology can ensure the progressive solidification of the castings and eliminate shrinkage and porosity.

Natural stone test methods. Determination of real density and apparent density, and of total and open porosity.

Using home-made devices and original technology roadmap, entangled titanium wire materials with different porosity have been prepared.

The reservoirs are low porosity, low permeability, and fracture-porosity sandstone reservoirs, which are main gas reservoirs of this area.

Coal reservoir is a dual porous rock composed of matrix porosity and fracture with its unique cleat system.

the main influencing factors are bedding, porosity structure, composition and wettability of the rock. This paper mak. . .

These heavy ring-forgings are made of large ingots directly. There are inevitably shrinkage cavities, porosity and segregation in ingots.

Therefore, porosity can be reduced through increasing the centrifugal radius and angular velocity in centrifugal field.

However, the resultant liquid-filled porosity is found to be too low. The error comes from treating the gas-filled porosity as matrix.

The relation between the chlorinity and porosity may be approximated by a hyperbola.

The microstructure of leakage area was analyzed and it was revealed that there was shrinkage porosity in the leakage area.

Swelled perlite is produced from calcined perlite. It has characteristics of little volumetric weight and large porosity.

Areas include: The Activation Process, Modifications to Porosity, Properties of Activated carbons, Applications, Theoretical.

It was indicated that the covering with low diffusion coefficient, small porosity and bad permeability was suitable to cover the pile.

The microstructure and porosity of the deposited metal can be systematically manipulated by the use of osmotic pressure.

The void volume can originate from the interstices between the carbon black particle due to their complex arrangement and from the porosity.

For direct quantitative measurement of porosity, reliance must be placed on formation samples obtained by coring.

With porosity increasing, gradient and intercept of AVO attributes are more sensitive to the changes of gas saturation than oil saturation.

The Water absorption (Wa), Porosity (Pa), Bulk density (D) and crushing strength, acid resistance, alkali resistance have been tested.

The results indicate that the porosity and the pore size can be controlled by the spacer materials volume and size.

therefore the presented friction layer has distinctive oil drainage grooves and a high, well defined porosity.

The thermal conductivity coefficient of closed-cell pure aluminum foam was measured as a function of porosity and cell size.

Tests showed that the films in water and closed the best corrosion resistance, low porosity layer.

The hydrophobicity and porosity of porous media should be increased to improve the cell performance while keeping other parameters constant.

The first part is composed of the interactive SSLOG processor , the sand- percentage processor, as well as the porosity processor .

It was observed that our approach correctly captured the porosity-permeability scatter in the geologic model for various facies groups.

During diagenetic process, the main factor destroying porosity is function of pressure and cementation .

With the increase of porosity of ceramic honeycomb, pressure loss decrease obviously, but regenerative capacity decreased obviously.

Therefore, much of the interest WAS centered on the investigation of porosity of unconsolidated materials.

Dynamic soft reduction is an effective method to reduce the central segregation and porosity of continuous casting slabs.

The density of foam decreased and its porosity increased as the blowing agent level in the foam increased.

Structure coefficients, sorting coefficients and radius average value increase with the increase of permeability and porosity.

The results show that the effective porosity and permeability are improved due to hydrates decomposition.

With the rise of reflowing temperature and extending of reflowing time, the porosity of tin plate was increased.

The cancellous bone porosity basically keep constant along the transversal direction.

Temperature is also found to be proportional to the porosity of the capillary structure.

Through nickel and copper electroforming experiments, the outer appearance and porosity of the deposits were studied.

The way of improving measurement precision is presented through the discussion of error analysis and measuring method of core porosity.

The long-term production rates from the wells match the porosity profile quite well.

Net thickness, organic content, matrix porosity and natural fractures are the key factors for shale gas enrichment.

However, with overall growth of physical property, the discrepancy of the parameter for porosity and permeability was raised.

This law applies to inspection steel, copper or copper alloy and aluminum alloy substrate surface coatings of polarity of the Yin porosity.

At such temperatures, the powders react internally to remove porosity and fully dense articles can be obtained.

The Upper Jurassic-Lower cretaceous reservoir in Minhe Basin is commonly of low porosity and low permeability or extremely low permeability.

soil porosity decreased in the surficial soil, especially, in which the large porosity significantly decreased; . . .

Porosity and content of Ca and P of the MAO ceramic coating were changing as the value of voltage, frequency or duty cycle was different.

Shrinkage and shrinkage porosity, stress and deformation often occurs during the production of heavy steel casting.

The dual porosity model with a quadric pressure gradient term in fracture phase is presented in the paper.

The essential characteristics of soil permeability are that the seepage channels are made up of soil porosity.

Bourgeon, location distribution and growth of porosity anodic oxide film affected by the formed air bubble were brought forward.

The powder comprises particles having a porosity of at least 55%.

The strand shallow lake-bar sandstone had the characteristics of thin reservoir, low porosity and low permeability.

The influence of different porosity and density on silicon carbide reticulated porous ceramics' mechanical properties, etc.

The result indicates that the porosity of mortar of pre-coated aggregates is reduced and its strength is improved.

OBJECTIVE: To evaluate the cell biocompatibility of high-porosity PCL scaffold made by electrostatic spinning technology.

Overgrowth quartz, chlorite and Illite obviously reduce the permeability and porosity of the reservoir.

For more highly cemented materials and limestones, significant difference in total porosity and effective porosity values may occur.

Four mean factors which include yarn fineness, fabric structure, porosity, thickness and surface density may effect the mesh properties.

The porosity of the coatings is obtained by the chemically densifying impregnated process.

It is indicated that the high-porosity PCL nanofiber stents produced by electrostatic spinning technology owns better biocompatibility.

As last, 1420 Al-Li alloy weld without porosity and with good appearance was obtained by adopting dual laser beams welding.

Commonly the dolomite crystals form a framework with evenly distributed porosity.

compressive strength and elastic modulus is mainly effected by porosity, which will sharply decrease with the increase of porosity.

Upper Paleozoic natural gas reservoir of Ordos Basin consists of low-permeability sandstone which bears typical secondary porosity.

The proportion of empty space in a rock is known as its porosity.

Methods Residual pyrethroids quantity of mandril under varies heating time are studied by gas chromatograph and calculate the porosity.

dissolution is positive to make secondary porosity and fracture as well as connectivity with pores.

The sandstone reservoir of this area is characterized by medium porosity and low permeability.

Forgings are consistent from piece to piece, without any of the porosity, voids, inclusions and other defects.

lithology-constrained sandstone porosity inversion can identify the gas-bearing reservoir from sandstone.

A great effort is made to keep porosity, segregation, impurities, and nonmetallic inclusions to as low a level as possible.

There is a certain functional relation between seismic interval velocity and formation porosity as well as residual porosity.

Research results show porosity is the main factor to control the resistivity for silty soil in Yellow River estuarine area.

Permeability can be estimated using the porosity from logging interpretation and the porosity-permeability model from the core analysis.

For diagenetic lithological hydrocarbon traps, the cutoffs of porosity or permeability and the fluid contacts control the reservoir sizes.

Acoustic wave is the important basic information to get porosity of formation and develop research about mechanics character of rock.

POWDER METALLURGY. PERMEABLE SINTERED METAL MATERIALS. DETERMINATION OF DENSITY AND OPEN POROSITY.

After analyzing we conclude that there are linear relationships between porosity, permeability and fractal dimension.

Easily operable, these screens can be raised to allow for more porosity or kept in place for visual interest.

Several groups of samples were made on moulding press and geometrical model of porosity formation was established to explain the mechanism.

Original porosity is typified by the intergranular porosity of sandstones and the intercrystalline and politic porosity of some limestones.

The pore structure mainly consists of axial canals and fine throats, being medium-high porosity, medium-low permeability reservoir.

Shrinkage porosity(hole)in thick-walled complex parts can be eliminated by chilling method.

Porosity is reduced with the increasing of confining pressures, which conforms to the rule of logarithmic function.

SOIL QUALITY. METHOD FOR MEASURING IN SITU THE EQUIVALENT HORIZONTAL HYDRAULIC CONDUCTIVITY AND THE DRAINAGE POROSITY. GUYON METHOD.

Metallic coatings - Porosity tests - Porosity in gold or palladium coatings on metal substrates by gel-bulk electrography.

Along with the increase of deepness , to porosity and permeability, mudstone reduce much more than sandstone.

As the increasing of open porosity, the density of products became less, and the mechanical properties became worse.

Shrinkage porosity and shrinkage cavity have relation with heat expansion of metal in welding process and forge force in later welding time.

Dolomites that generated abundant secondary porosity in the Late Devonian and Early Carboniferous would also make good targets.

Wu Erhe Oilfield belongs to medium porosity, low permeability oil reservoir, and is intensively heterogeneous .

The brake lining manufactured with the formula can effectively improve the porosity and the high temperature resistance of materials.

We require Insulating Firebricks with light weight which has high mini-porosity arranged in average, keep furnace wall low radiation.

Local pressurization is a novel method for eliminating porosity occurred in casting with thick-section in die casting process.

The membrane was characterized by pure water permeability, porosity, bubble point, mean pore radius and tensile strength.

The pore porosity is the main factor to the rock porosity. The aspect ratio of crack is small; its shape is long and thin.

With the increasing of time, the porosity of porous silicon also increases.

Effective porosity controls gas distribution, while fracture controls gas production rate.

Center segregation and center porosity will seriously affect the internal slab quality for continuous casting bloom.

The results show that the microstructure of the coating is fine, uniform, free of porosity and crack.

The result shows that the porosity of sandstone reservoir in the studied area is mainly controlled by both sedimentation and diagenesis.

Formate solid free drilling fluid is aimed at solving low porosity, low permeability and borehole instability in Jilin oilfield.

Different porosity reading on the neutron porosity log for the same formation due to gas in the pore space.

For hydrocarbon reserve estimation, no correction of the measured porosity is required.

What inspection functions are performed for the detection of casting cracks, porosity, and shrinks?

Ultrasonic study of UO2: effects of porosity and grain size on ultrasonic attenuation and velocities.

With the increase of porosity, the tensile strength decreases with exponential distribution.

The green bodies of porous ceramic with high porosity and low bulk density were fabricated by the gel casting-foam method.

The flow of chemical grout in the medium with double porosity is a two phase flow process.

Measured capillary pressure curves are different for cores with different permeability and porosity.

The porosity of its gel was 89. 33% after calculation and porous materials could be proved for it.

The reservoirs are characterized by low porosity and permeability, low water saturation, and the mesoporous and small throat system.

Conventional logging methods fail to calculate the accurate porosity and permeability in such kind of complex reservoir.

The peper describes a drawing and its use in the quality control of the porosity examination for refractories.

Casting defects, especially porosity, will reduce fatigue strength of the crank-shaft.

More robust permeability estimation can be made by integrating multiple logs in the transform instead of just porosity.

Get consistent rock parameters: P-wave velocity, porosity, and mineral properties of sands, fluid modulus and density.

To show the idea of the new method the dependence of the effective diffusion coefficient in the porous medium on the porosity is deduced.

The soil bulk density and soil porosity of triangular spacing was between the formers.

Media deformation has great effect on permeability while it has little effect on porosity.

The reservoirs are characterized by considerable variation in porosity and permeability.

Combining the special chemical composition and rock texture characteristic, models of reservoir porosity calculation are set up.

The relation between air permeability and covering factor , air permeability and porosity are discussed.

Volcanic ash can help make soil more fertile by increasing its permeability and porosity, thus improving its ability to retain water.

The porosity of the fiber bundle may be varied to enhance gas exchange with the blood.

The low-porosity and low-permeability tight sandstone reservoir is a complicated kind of reservoirs.

Reservoir porosity is mainly influenced and controlled by sedimentary facies and diagenesis .

In this paper the effect mechanism of the porosity of porous silicon (PS) on its thermal insulation is proposed.

Generally reservoir intervals are classified by the lower limit of porosity a. . .

SOLID FUELS. COKE. DETERMINATION OF TRUE RELATIVE DENSITY, APPARENT RELATIVE DENSITY AND POROSITY.

The porous superalloy material with oriented linear porosity was fabricated by metal powders sintering.

In the same porosity, the finer the powder, the better the mechanical properties of porous material.

Fault block Liu 17 is the main reservoir of Liuxi Oil Field, and is a typical reservoir with multilayer, low porosity and low permeability.

The results may lay a foundation for refined reservoir descriptions and a geologic modeling of dual porosity reservoir in the study area.

Other factors that affect porosity are compaction, consolidation and cementation.

The particles may be spherical or irregular, of varying porosity and specific surface area.

The cake's local porosity decreased with increasing the standard deviation in normal distribution function.

The carbon nanostructures exhibit high surface area, high porosity, and high graphitization.

It was showed that the porosity size decreases with decreasing powder size.

The porosity in a formation that has experienced differential compaction can vary considerably from one area to another.

Analyzed by an example, it is shown that the parameters of stress, strain, porosity and permeability change with time and space.

Its application to pattern recognition is from the results obtained in classification of cracks and porosity in weld defect.

The results show that the methods of sample pretreatment and the methods of test have considerable effect on the measured porosity.

The Permian Shanxi Formation in Yulin Gas Field is a typical low porosity and low permeability lithologic reservoir.

Secondary porosity formed formed by unsteady mineral is beneficial to formation "s development. "

The measured average tensile strength is decreased also evidently with porosity, but more sensible to porosity.

Porosity and segregation is common flaws in aluminum alloy , which seriously affects the properties of product.

the number of porosity is major factor of affecting tensile strength and elongation.

Combining with his own working practice, the writer also proposed some suggestions about how to prevent the shrinkage porosity and cavity.

Surface porosity, surface composition and surface tension are all relevant factors.

he characteristics of low permeability reservoirs are lower porosity, lower permeability and in homogeneity.

The Jilin oil field is typical low the oil field, water-in low porosity and low permeability injection development primarily.

the microchannel has uniform porosity and comparatively large specific surface area and aspect ratio.

The friction coefficient of sample with high porosity tended to reduce and stabilize in continuous braking cycles.

This model is suitable for predicting the porosity of clastic rock reservoirs with relatively high matrix content.

This paper summarizes the mechanism, structure, calculation formula and operation procedure of KXD-1 type porosity measuring instrument.

Methods: The porosity of dental glass ceramic was analysed by image manipulation device. The control group was free of pore.

Porosity influenced solubility behavior of oxide layer intensely. Like barrier layer, porous layer is also a semiconductor.

Sandstone gas reservoirs in west Sichuan belong to low porosity and low permeability tight super tight gas reservoir.

Porous aluminum oxide films were prepared by anodization of Al sheets. The factors that affect porosity were studied.

Dynamic soft reduction is the ideal technology to eliminate the issue of center segregation and center porosity.

Metallic and other inorganic coatings - Definitions and conventions concerning porosity.

Many gas reservoirs in Sichuan basin belong to crack porosity one, of which non-uniform is much high.

Modified liquid substitution method was utilized to measure porosity of various scaffolds.

In acoustic property, sound absorption characteristic is positively related to larger porosity and larger aggregate grading.

The fracture shows quasi-cleavage, which does not exist porosity and crack.

Upper Paleozoic reservoirs in Ordos basin are dense reservoirs with low porosity and permeability .

Problems of these kinds of porosity come from the different-scale coupling effects between pores, fractures, caves and solid skeletons.

The more smaller pore size, the more stronger internal Magnetic field gradient. The nmr porosity is significantly lower.

From the density of the rock, the porosity of the rock can be calculated.

Can increase the internal porosity of the friction material thus helping to reduce noise.

metallic coatings . test methods for electrodeposited gold and gold alloy coatings . part 3 : electrographic tests for porosity.

Statistic of sample data identify that the reservoir has low porosity and low permeability.

with the same blowing ratios and porosity of holes, the hole arrangement has little effect on cooling effectiveness.

Billets shall be free from all harmful cracks, central porosity, blow holes and pin holes.

The shrinkage rate and porosity of the compound porous metal were analyzed by SEM and weighting.

In the paper, continuous geophysical well logs from Hole 1148A are used to inverse the mineral components and porosity.

With the increase of CVI time, the porosity of the composite decreases while the density increases.

Volcanics mainly growth gas pocket, primary rift and secondary rift, The secondary porosity of clastic rocks is much more developed.

After more than a hundred years' petroleum exploration, it's difficult to find high abundance, high porosity and permeability reserves.

The results show that the compound porous metal has large specific surface were and high porosity.

The present work has provided a new method to use laser technology to examine the porosity of the porous ceramic tubes.

Why would a manufacturer have different porosity frits at the column inlets and outlets? Simple.

The porosity rate function method and the water inflow content method are used in the numerical simulation.

Among them, leaching of meteoric water has contributed less to the formation of anomalously high porosity zones compared to other factors.

J function can eliminate the impact of permeability and porosity by dimensionless treatment.

The flaky and curved lamellar throat is major proportion, so the reservoir is low porosity and permeability.

The compact film layer is stable and compact at high temperature and eliminates the defects of the graphite substrate caused by porosity.

The pore radii distribution has some influences on tensile strength of disk model with smaller porosity.

Aerospace series - Elements of electrical and optical connection - Test methods - Part 507 : plating porosity.

So, there may exist the phenomenon of permeability reduction with the porosity increase.

It is concluded that porosity and permeability of the core are declined with the increase of pressure.

It contains a study of fluid flow in metamorphic environments and their interaction with rock properties such as porosity and tortuosity .

Non of the other food, porosity should not greater than 45%, packaging layer should have not more than 3 levels deep.

There is a clear linear positive correlation between the soil water infiltration rate and the soil porosity.

Shrinkage and porosity were basically eliminated by actual experiment.

The methodology and steps to estimate porosity and saturation using seismic data are presented.

A subsurface body of rock having sufficient porosity and permeability to store and transmit fluids.

However, the different types of rock's diagenesis influence porosity greatly.

Diagenesis control the porosity evolution, with symbolic meaning, it is very important for the exploration of the oil and gas.

The results showed that as compared with direct current, revense pulse plating could obviously decrease porosity of nickel deposits.

The relationship between porosity and permeability of porous medium was studied.

porosity of fracture system was determined from fracture width and permeability.

An amendment should decrease bulk density, increase total porosity, and incr ease water and air content.

Our proprietary setup procedures enable us to plate in deep cavities, while maintaining electroform thickness with zero porosity.

than in the solid state, the subject of weld porosity is relevant to fusion zone discussion.

As a result, the high quality reservoirs are developed in a generally low porosity and permeability background.

Compact rock formation formed a available reservoir with effective porosity and permeability because there are a many of fractures in it.

Some soils lack porosity, so that they' re hard to cultivate, slow to absorb water, and inclined to puddle.

Mass transfer rate becomes fast as temperature rises or as pore size and porosity of membrane becomes large.

The influences of raw materials and phases on the porosity, gas per me ability, pore size and shape were studied.

Fuyu reservoir is characterized by low porosity, low permeability and low abundance.

The neutron porosity log reads low, whereas the density log reads high and relatively accurately.

Results: indicate that addition of fly ash has great influence to concrete porosity and strength.

The porosity evolution of reservoir is closely related with the diagenesis types.

Fractured porosity is a key parameter to fractured reservoir evaluation.