Chapter 5: Porosity
surface area of the grains. The specific surface area (exposed grain surface area per unit solid volume) is inversely proportional to grain size. This indicates that, when all other factors are equal, a given weight of coarse grains will be stabilised at a lower porosity than the same weight of finer grains. For a sedimentary rock
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16. THE SONIC OR ACOUSTIC LOG 16.1 Introduction
homepages.see.leeds.ac.uk16. THE SONIC OR ACOUSTIC LOG 16.1 Introduction The sonic or acoustic log measures the travel time of an elastic wave through the formation. This information can also be used to derive the velocity of elastic waves through the formation.
17. RESISTIVITY THEORY 17.1 Introduction 17.2 Basic ...
homepages.see.leeds.ac.ukThus, if we take a cylindrical rock sample with two flat faces A and B, and set a potential difference ∆E =E A-E B between its end faces, a currentI will flow through the rock from face A to face B (Fig. 17.1). If we measure the current and the potential difference, we can calculate the resistance of the rock sample using Eq. (17.1).
Chapter 2: Reservoir Fluids - University of Leeds
homepages.see.leeds.ac.ukHelium 0.06983 0.07179 Argon 0.2516 0.1760 Radon 1.675 0.8911 Hydrogen 0.1413 0.1313 ... pressure-volume relationships obtained can be plotted on a pressure-volume diagram with the bubble point and dew point locus also included (Figure 2.2). Note that the bubble point and ... phase and liquid phase can coexist, and hence have an interface (the ...
19. ELECTRICAL LOGGING 19.1 Introduction
homepages.see.leeds.ac.ukElectrical logs are perhaps the most important tools available to a petrophysicist. This is because they provide a method for calculating the water saturation, upon which calculations of STOOIP are based. They were also some of he first logs to be used, with …
5. WIRELINE LOGGING 5.1 What is a Wireline Log
homepages.see.leeds.ac.ukThe tools required to make these measurements are attached to the drill string behind the bit, and do not use a wire relying instead on low band-width radio ... largest wireline companies are Schlumberger and Halliburton, although there is a range of smaller specialist companies too.
4. FLUID SATURATION AND CAPILLARY PRESSURE 4.1 Fluid ...
homepages.see.leeds.ac.ukTake the surface of any liquid droplet, and imagine that a circle is drawn on this surface with radius R. The area of the circle is pR2 (Fig. 4.2). To increase the surface area of this drop by one unit of surface area, work must be done to move molecules from …
15. THE NEUTRON LOG 15.1 Introduction
homepages.see.leeds.ac.uk15. THE NEUTRON LOG 15.1 Introduction The neutron log is sensitive mainly to the amount of hydrogen atoms in a formation. Its main use is in the determination of the porosity of a formation. The tool operates by bombarding the formation with high energy neutrons. These neutrons undergo scattering in the formation, losing energy
StaMPS/MTI Manual - University of Leeds
homepages.see.leeds.ac.ukof >>before a command indicates that the command is a matlab script. 1.2.1Pre-processing There are two potential pre-processing steps before getting to the PS/MTI processing proper. The first is to focus the raw data (if required), and the second is to form interferograms from single-look complex (SLC) images.
Chapter 10: Relative Permeability
homepages.see.leeds.ac.ukTypical intermediate wettability relperm data are shown in Figures 10.17 and 10.18. The shape of the relperm curves is significantly different for the high and low rate floods. However, the volume of oil produced is similar. Figure 10.19 shows steady state data obtained from a core containing mobile kaolinite fines.
2. POROSITY - University of Leeds
homepages.see.leeds.ac.ukbetween 0 and 1, or a percentage varying between 0% and 100%. Sometimes porosity is expressed in ‘porosity units’, which are the same as percent (i.e., 100 porosity units (pu) = 100%). However, the fractional form is ALWAYS used in calculations. Porosity is calculated using the relationship (2.1) where: V pore = pore volume V bulk = bulk ...
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4. FLUID SATURATION AND CAPILLARY PRESSURE 4.1 Fluid ...
homepages.see.leeds.ac.ukTake the surface of any liquid droplet, and imagine that a circle is drawn on this surface with radius R. The area of the circle is pR2 (Fig. 4.2). To increase the surface area of this drop by one unit of surface area, work must be done to move molecules from …
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RELATIONSHIP BETWEEN THE SPECIFIC SURFACE AREA …
www.qualicer.orgthe specific surface area of samples with a high specific surface area because they had a porous inner structure. In contrast, the values obtained for these samples using the BET technique exhibited a good correlation with the certified values (Table 1). It was subsequently evaluated for which materials there was a satisfactory correlation