scholarly journals Physical and reservoir properties prediction for reservoir rocksin unconventional gas-bearing geological structures

2014 ◽  
pp. 35-40 ◽  
Author(s):  
L. Skakal's'ka
Keyword(s):  
Mechanical Properties ◽  
Elastic Waves ◽  
Elastic Moduli ◽  
Physical And Mechanical Properties ◽  
Geophysical Data ◽  
Reservoir Properties ◽  
Empirical Relationships ◽  
Geological Structures ◽  
Wave Velocities ◽  
Gas Bearing

Research into the behavior of elastic waves in thin-layered gas-bearing geological structures depends on the choice of geophysical and mathematical models of natural geological media and the numerical methods of problem solving. Hence the efficiency of a quasi-homogeneous, isotropic fractured-porous two-phase medium with given physical and mechanical properties. We have suggested a method of calculating empirical relationships between volumetric compression, porosity and pressure in porous rocks of an arbitrary geological region. Data on Zaluzhany wells were used to calculate the correlation and empirical relationships between reservoir properties and parameters of elastic waves and to distinguish dry and oil-gas saturated rocks. The least square technique made it possible to determine the correlation between the compressibility factor of fluid-saturated rocks and their porosity and pressure. Discrimination between oil and water was based on the density parameter. An algorithm has been suggested to do the corresponding calculations. The theoretical and practical implications of this study are as follows: – developing a numerical analytical predictive model for interpreting acoustic data on thin-layered rocks which is based on the correlations between their dynamic physical (effective wave propagation velocities, amplitude attenuation coefficients and their energy absorption) and reservoir (porosity, fracturing, compressibility) properties; – applying the proposed model and software products in geophysical exploration to interpret the geological and geophysical data on the structure and physical characteristics of sections and the physical properties of gas-bearing basins. In seismic acoustic exploration, the numerical model has to include experimental geological and geophysical data on the peculiarities of rock occurrence in the investigated area, with the physical and mechanical properties of different territories showing considerable variation. Such input data, as well as structural features and scattering properties of rocks (density, bedding, microporosity), ensure a significant increase in the accuracy of the numerical analysis. Preliminary testing was based on the data on the elastic moduli and S-wave velocities for dry and fluid-saturated rocks. Calculations were made of the elastic moduli and P-wave velocities for dry and fluid-saturated rocks of the Western oil and gas region of Ukraine (Zaluzhany-18 and Zaluzhany-19 wells). The aim of this work was to demonstrate the efficiency of the predictive method by examining the reservoir rock properties of the wells and to evaluate their gas saturation using the acoustic logging, geophysical and petrophysical data.

Influence of particle size and interfacial interactions on the physical and mechanical properties of particle-filled myofibrillar protein gels

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 60723-60735 ◽  
Author(s):  
Andrew J. Gravelle ◽  
Shai Barbut ◽  
Alejandro G. Marangoni
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Elastic Moduli ◽  
Physical And Mechanical Properties ◽  
Surface Effects ◽  
Myofibrillar Protein ◽  
Interfacial Interactions ◽  
Filler Size ◽  
Protein Gels

The mechanical properties of glass and wax particle-filled myofibrillar protein gels were characterized based on filler size and surface effects. Increases in elastic moduli were explained using established models describing particle-filled networks.

TOTAL POROSITY AND MATRIX PARAMETERS OF CARBONATE ROCKS BASED ON THE ELASTIC WAVE VELOCITY AND DENSITY MEASUREMENTS

2018 ◽  
Vol 473 (473) ◽  
pp. 13-26
Author(s):  
Jadwiga JARZYNA ◽  
Edyta PUSKARCZYK ◽  
Ewa OGÓREK ◽  
Jacek MOTYKA
Keyword(s):  
Elastic Wave ◽  
Elastic Waves ◽  
Total Porosity ◽  
Elastic Wave Velocity ◽  
P Wave ◽  
Reservoir Properties ◽  
Rock Samples ◽  
Additional Information ◽  
Wave Velocities ◽  
Boundary Velocity

The purpose of the research was to find relationship between elastic waves velocities obtained from lab measurements and parameters from hydrogeological research. Measurements were conducted on 73 rock samples originating mostly from Jurassic limestone of the Olkusz area. Additional information about the rock samples was obtained when the elastic wave velocities were compared with reservoir parameters such as porosity, permeability and density. Plots of elastic waves velocities vs. porosity and bulk density vs. porosity gave information about the range of P wave velocities from the boundary velocity to the values when porosity is equal to zero. Matrix velocity and density values were introduced into the formulas used to calculate porosity. Anisotropy analysis was made on the basis of elastic wave velocities measured on cores cut in two perpendicular directions. This allowed for identification of fractures in rocks. Results showed that by comparing various petrophysical parameters it was possible to get better information about reservoir properties of aquifers.

scholarly journals Strength coefficient estimation by indirect methods

2021 ◽  
Vol 1 (3) ◽  
pp. 28-35
Author(s):  
Arkadii N. Avdeev ◽  
Elena L. Sosnovskaia ◽  
Aleksandr Iu. Bolotnev
Keyword(s):  
Mechanical Properties ◽  
Modulus Of Elasticity ◽  
Physical And Mechanical Properties ◽  
Acoustic Properties ◽  
Mining Operations ◽  
Indirect Methods ◽  
Strength Coefficient ◽  
Coefficient Estimation ◽  
Non Destructive ◽  
Gas Bearing

Introduction. In exploration, construction, and mining operations it is necessary to assess the physical and mechanical properties of rocks. However, laboratory rock tests are expensive, time-consuming, and require a large number of quality rock samples. There is a problem of rapid evaluation of physical and mechanical properties by indirect, non-destructive methods. The problem is considered on the example of one of the basic properties, the strength coefficient according to Protodiakonov's scale. Research methodology included the analysis of the main indirect methods of determining the strength coefficient based on strength, elastic and acoustic properties of rocks on the grounds of statistical empirical relationships of V. V. Rzhevskii, G. Ia. Novik, L. I. Baron; K. L. Ter-Mikaelian, A. I. Beron, and M. M. Protodiakonov. The most promising methods based on non-destructive laboratory tests of modulus of elasticity and longitudinal wave velocity are selected. Results and conclusions. The strength coefficient was calculated by several methods on the example of siliceous sandstones, selected from the exploration well of the gas-bearing field. The results were compared with each other and with cadastral references and materials. The most optimal for calculations were the dependences of V. V. Rzhevskii, G. Ia. Novik, and L. I. Baron when evaluating the strength coefficient by the modulus of elasticity, and the dependences of A. I. Beron and L. I. Baron when calculating based on acoustic characteristics.

Dynamic elastic moduli of a suspension of imperfectly bonded spheres

1974 ◽  
Vol 76 (3) ◽  
pp. 587-600 ◽  
Author(s):  
A. K. Mal ◽  
S. K. Bose
Keyword(s):  
Elastic Material ◽  
Elastic Waves ◽  
Elastic Moduli ◽  
Random Distribution ◽  
Spherical Particles ◽  
Shear Stresses ◽  
Wave Velocities ◽  
The Matrix ◽  
Dynamic Elastic Moduli ◽  
Earthquake Faults

AbstractAn isotropic elastic material containing a random distribution of identical spherical particles of another elastic material is considered. The bonding between the spheres and the matrix is imperfect, so that slip may occur at interfaces when stress is applied to the medium. The shear stresses at the interface is assumed to be proportional to the amount of slip. The velocity and attenuation of the average harmonic elastic waves propagating through such a medium are calculated. The results are valid to the lowest order in frequency for wave lengths long compared with the radius of the sphere. The dynamic elastic moduli are obtained from these results and are compared with available results for welded contact. The variations in the P and S wave velocities for propagation across earthquake faults is discussed.

scholarly journals GEOPHYSICAL BASIS OF ENGINEERING EARTHQUAKE PROTECTION OF RESPONSIBLE CONSTRUCTION OBJECTS

2014 ◽  
Author(s):  
В.Б. Заалишвили ◽  
Я.Л. Кранцфельд
Keyword(s):  
Mechanical Properties ◽  
Seismic Hazard ◽  
Shear Waves ◽  
Physical And Mechanical Properties ◽  
Strong Earthquakes ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Earthquake Protection ◽  
Level Reduction ◽  
Shielding System

Для создания систем экранирования с целью снижения уровня воздействия при сильных землетрясениях необходимо знание вида и физического состояния грунтовой толщи. Таким показателем являются скорости распространения продольных и поперечных волн в том или ином виде грунта и находящимся в некотором состоянии. На основе большого анализа фактического материала были составлены гистограммы распределения значений скоростей, как в различного вида грунтах, так и в грунтах одного вида, с различны- ми физико-механическими показателями. Наличие большого фактического материала позволило получить корреляционные зависимости между плотностью и скоростью распространения поперечных волн. Наличие подобных данных, позволяющих прогнозировать вероятностные значения скоростей поперечных волн и отсюда, со- ответствующих плотностей грунтов, позволяет повысить обоснованность и контролируемость их значений, как при работах по экранированию зданий и сооружений, а также при оценках сейсмической опасности грунтов. To create a shielding system with a purpose of impact level reduction at strong earthquakes, it is necessary to know the type and physical condition of the ground layer. Velocities of stress and shear waves in one or another form of the soil being in a certain state are such indicators. The histograms of velocity values were composed on the basis of wide analysis of factual material, as in various types of soils so in soils of one type, with different physical and mechanical properties. The availability of a lot of factual material made it possible to obtain correlations between density and propagation velocity of shear waves. The availability of such data that allows to predict the probability values of shear wave velocities and hence the corresponding densities of the soil, can improve the validity and accountability of their values, as when working on shielding of buildings and constructions so for assessment of seismic hazard soils.

scholarly journals Application of geophysical research of wells in determining the qualitative characteristics of coals and physico-mechanical properties of containing rocks

2020 ◽  
pp. 32-35
Author(s):  
I. V. Vasileva
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Ash Content ◽  
Operating Conditions ◽  
Geophysical Data ◽  
Coal Seams ◽  
Coal Quality ◽  
Geological Conditions ◽  
Definition Of

Geophysical exploration wells during the exploration of coal deposits solve many geological problems. Among them: the lithological section subdivision, allocation of coal seams, the definition of the depth of their occurrence and the angles of incidence breeds, the definition of power, structure, ash, coal quality characteristics, determination of synonymy coal seams, and others. Data of GSW used in the calculation of coal reserves in the field. Precision geophysical definition of physical and mechanical properties of rocks is estimated by comparing the results obtained with the data of GSW, and rock samples in the laboratory.Geophysical surveys of boreholes are used to solve the following geological problems: lithological dissection of the section; allocation of coal seams and determination of their depth; determining the thickness, structure and ash content of coal seams, as well as determining the characteristics of coal quality; highlighting tectonic faults in borehole sections, determining their type and amplitude; determination of hydrological operating conditions, study of the temperature and gas regime of rocks, technical condition of boreholes.In addition, GIS data is used to calculate the explored coal reserves.Interpretation of geophysical data is the clarification and explanation of the information received regarding the geology of the site and the physical and mechanical properties of the object. Interpreting geophysical data is challenging. Its solution is of great practical importance for the prospecting and exploration of mineral deposits. The article provides an overview of some of the existing methods of determining the ash content of coal on the results of GSW and forecast geological conditions of coal mining.

scholarly journals COMPARATIVE SURFACE DAMAGE DETERMINATION AT A JEWISH GRAVE USING TWO DIFFERENT MOBILE ULTRASONIC VELOCITY DEVICES

2017 ◽  
Vol 50 (3) ◽  
pp. 1626 ◽  
Author(s):  
B. Christaras ◽  
An. Moropoulou ◽  
M. Chatziangelou ◽  
L. Dimitraki ◽  
K. Devlioti
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Surface Damage ◽  
P Wave ◽  
University Campus ◽  
Ultrasonic Velocities ◽  
Wave Velocities ◽  
Non Destructive ◽  
Destructive Methods

The non-destructive methods are necessary in the investigation of the physical and mechanical properties of the materials in monuments. In this framework the ultrasonic velocities were used in situ for the elaboration and evaluation of the weathering on the surfaces of monuments. Additionally, the P-wave velocities were used for the estimation of the depth of weathered zone, as well as the depth of cracks at the surface of the monument. This estimation was performed on a Jewish tomb placed in the AUTH university campus between the building of Law and Economic Sciences and the Administration building, of the Aristotle University of Thessaloniki. 

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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