- Tytuł:
-
Wpływ zailenia na wartości parametrów sprężystych w osadach miocenu
The impact of shale volume on the elastic properties values in the Miocene deposits - Autorzy:
-
Lis-Śledziona, Anita
Mroczkowska-Szerszeń, Maja - Powiązania:
- https://bibliotekanauki.pl/articles/1834129.pdf
- Data publikacji:
- 2020
- Wydawca:
- Instytut Nafty i Gazu - Państwowy Instytut Badawczy
- Tematy:
-
moduły sprężystości
minerały ilaste
prędkości fal sprężystych
utwory piaszczysto-ilaste
miocen
elastic moduli
clay minerals
velocity of elastic waves
sandy-shaly formation
Miocene - Opis:
- The elastic parameters of clay minerals are poorly recognized mainly due to the small size of clay minerals and the difficulty in isolating individual crystals to measure their acoustic properties. So far the effective elastic properties of clays have been derived either by theoretical computation, or by a combination of theoretical and experimental investigations on clay mixtures. The aim of the article was to determine the effect of clay mineral content on the values of P-wave velocity and S-wave velocity. In the research area, the main clay minerals are: illite (25–30%), interstratified clay minerals illite/smectite (5–10%) and kaolinite (0.5–1.3%). There are also silicates present in the formation in the form of chlorite (2–9%). The first stage of the work consisted in laboratory tests on nine samples from Miocene deposits from the R-1 well. The FTIR (Fourier Transformed Infrared Spectroscopy) was used to measure the content of individual minerals using ATR (Attenuated Total Reflectace) technique. In addition, P- and S-waves velocity measurements were performed. Due to the high brittleness of the tested samples, the velocity measurements were performed under static conditions. The values of the elastic modulus were calculated based on measured velocities. The mineralogical model was built and calibrated based on the measured clay content and porosity was calculated. As is well known, the values of elastic parameters are closely related to the porosity. However, the content of clay minerals also has a considerable impact on the values of elastic parameters. Static values of P-wave and S-wave velocity were converted to dynamic values. Using the Castagna formula, the values of S-wave velocity were calculated. The final stage of the work consisted in determining the relationship between the clay mineral content and P-wave velocity values, S-wave velocity and elastic moduli: the Young modulus, the bulk modulus. The relationship between P-wave velocity and S-wave velocity for different ranges of clay content was presented using the Greenberg–Castagna model for clastic silicate rocks.
- Źródło:
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Nafta-Gaz; 2020, 76, 1; 18-21
0867-8871 - Pojawia się w:
- Nafta-Gaz
- Dostawca treści:
- Biblioteka Nauki
Artykuł