The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field
< p>Petrophysical and geophysical laboratory measurements were performed on ⁽40⁾ samples made of sandstone and limestone in an Oil Field. Parameters including porosity, density and permeability were measured along with the of compressional and shear waves’ velocities of the samples under reser...
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| Format: | Article |
| Language: | English |
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Reaserch Institute of Petroleum Industry
2022-05-01
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| Series: | Journal of Petroleum Science and Technology |
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| Online Access: | https://jpst.ripi.ir/article_1287_f9869e6ffa4042f32ec6513f50064f24.pdf |
| _version_ | 1797893074232279040 |
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| author | Fariborz TALEBI Farnusch HajiZadeh |
| author_facet | Fariborz TALEBI Farnusch HajiZadeh |
| author_sort | Fariborz TALEBI |
| collection | DOAJ |
| description | < p>Petrophysical and geophysical laboratory measurements were performed on ⁽40⁾ samples made of sandstone and limestone in an Oil Field. Parameters including porosity, density and permeability were measured along with the of compressional and shear waves’ velocities of the samples under reservoir conditions. Also, the study of microscopic thin sections, factors affecting the velocity of waves including porosity, Poisson’s ratio, density, pressure and pore type were investigated. The scattering of points in the velocity diagrams of elastic waves based on the petrophysical parameters of the rock indicates that the most important factor of velocity changes is the pore type in the samples in the same porosity value. So, ‹LMR› parameters were calculated using laboratory results of velocity measurement. The values of ‹LMR› parameters of seismic data were determined by the velocities of compressional and shear waves in the pre-stack stage seismic. Then, using seismic inversion, compressional and shear wave resistances were estimated and seismic sections with ‹λ.μ› and ‹μ.ρ› parameters were created. The results show that there is a good correlation between laboratory measurement of rock physics and pre-stack seismic data. Also, the factor affecting the velocity of waves, i.e., the pore types, should also be considered. Uncertainty in velocity values due to the diversity of pores can show differences in the velocity of elastic waves in the same porosity value to about ⁽1500⁾ m/s. Also, at a constant velocity, porosity changes of up to ⁽20⁾ percent are visible. |
| first_indexed | 2024-04-10T06:47:08Z |
| format | Article |
| id | doaj.art-4c867b0886244ae69eddb3435d5e2ec7 |
| institution | Directory Open Access Journal |
| issn | 2251-659X 2645-3312 |
| language | English |
| last_indexed | 2024-04-10T06:47:08Z |
| publishDate | 2022-05-01 |
| publisher | Reaserch Institute of Petroleum Industry |
| record_format | Article |
| series | Journal of Petroleum Science and Technology |
| spelling | doaj.art-4c867b0886244ae69eddb3435d5e2ec72023-02-28T11:57:32ZengReaserch Institute of Petroleum IndustryJournal of Petroleum Science and Technology2251-659X2645-33122022-05-01122344110.22078/jpst.2023.12871287The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil fieldFariborz TALEBI0Farnusch HajiZadeh1Geophysics Research Group, Geoscience Division, Research Institute of Petroleum Industry IRPI, IranDepartment of Mining Exploration Engineering, Urmia University, Iran< p>Petrophysical and geophysical laboratory measurements were performed on ⁽40⁾ samples made of sandstone and limestone in an Oil Field. Parameters including porosity, density and permeability were measured along with the of compressional and shear waves’ velocities of the samples under reservoir conditions. Also, the study of microscopic thin sections, factors affecting the velocity of waves including porosity, Poisson’s ratio, density, pressure and pore type were investigated. The scattering of points in the velocity diagrams of elastic waves based on the petrophysical parameters of the rock indicates that the most important factor of velocity changes is the pore type in the samples in the same porosity value. So, ‹LMR› parameters were calculated using laboratory results of velocity measurement. The values of ‹LMR› parameters of seismic data were determined by the velocities of compressional and shear waves in the pre-stack stage seismic. Then, using seismic inversion, compressional and shear wave resistances were estimated and seismic sections with ‹λ.μ› and ‹μ.ρ› parameters were created. The results show that there is a good correlation between laboratory measurement of rock physics and pre-stack seismic data. Also, the factor affecting the velocity of waves, i.e., the pore types, should also be considered. Uncertainty in velocity values due to the diversity of pores can show differences in the velocity of elastic waves in the same porosity value to about ⁽1500⁾ m/s. Also, at a constant velocity, porosity changes of up to ⁽20⁾ percent are visible.https://jpst.ripi.ir/article_1287_f9869e6ffa4042f32ec6513f50064f24.pdfcompressional and shear waves velocitiespoisson’s ratiolame coefficientspre-stackpore types |
| spellingShingle | Fariborz TALEBI Farnusch HajiZadeh The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field Journal of Petroleum Science and Technology compressional and shear waves velocities poisson’s ratio lame coefficients pre-stack pore types |
| title | The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field |
| title_full | The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field |
| title_fullStr | The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field |
| title_full_unstemmed | The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field |
| title_short | The effect of porosity on the seismic waves velocities and elastic coefficients in a South-Western Iran''''s oil field |
| title_sort | effect of porosity on the seismic waves velocities and elastic coefficients in a south western iran s oil field |
| topic | compressional and shear waves velocities poisson’s ratio lame coefficients pre-stack pore types |
| url | https://jpst.ripi.ir/article_1287_f9869e6ffa4042f32ec6513f50064f24.pdf |
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