Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Izzy Kutasov"'
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
Polar Research, Vol 38, Iss 0, Pp 1-9 (2019)
In the cold regions, warm mud is usually used to drill deep wells. This mud causes formation thawing around wells, and as a rule is an uncertain parameter. For frozen soils, ice serves as a cementing material, so the strength of frozen soils is signi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d69d38cf961d376536dec256599ff1d
https://polarresearch.net/index.php/polar/article/view/3351/9269
https://polarresearch.net/index.php/polar/article/view/3351/9269
Autor:
Izzy Kutasov, Lev Eppelbaum
Publikováno v:
Geothermics. 71:259-263
The most important data on the thermal regime of the Earth’s interior come from temperature measurements in deep boreholes. The drilling process greatly alters the temperature field of formations surrounding the wellbore. In permafrost regions, due
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::272f747482f39a6160b24d41e8c48cb7
https://doi.org/10.1016/j.geothermics.2017.10.005
https://doi.org/10.1016/j.geothermics.2017.10.005
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
International Journal of Thermal Sciences. 122:133-140
Because deep wells in permafrost areas are usually drilled with a warm mud, there is some unknown degree of formation thawing around the wells. The warm mud alters the temperature field and as a result thaws the permafrost. To determine the static te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca1578d5a616b4e651ec77a5c197b997
https://doi.org/10.1016/j.ijthermalsci.2017.07.031
https://doi.org/10.1016/j.ijthermalsci.2017.07.031
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
Cold Regions Science and Technology. 151:156-158
Earlier we developed an approximate method of calculating the radius of permafrost thawing by a cylindrical source with a constant temperature. In this study, we show that the effect of thermal properties changing at the ice-water transition on the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a297ff2c1827939805e81a99f3acf643
https://doi.org/10.1016/j.coldregions.2018.03.018
https://doi.org/10.1016/j.coldregions.2018.03.018
Publikováno v:
International Journal of Petroleum Technology. 2:53-57
In deep and hot wells, the densities of water/oil muds and brines (geofluids) can be significantly different from those measured at surface conditions. As a result, bottom-hole pressures predicted with constant mud densities can be in error by hundre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca09e77557b3ca9e3f5fd05534ec3316
https://doi.org/10.15377/2409-787x.2015.02.02.3
https://doi.org/10.15377/2409-787x.2015.02.02.3
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
International Journal Of Petrochemical Science & Engineering. 2
Exact determination of thermal parameters is of high importance in a wide spectrum of both solid Earth investigations and subsurface geological and environmental studies This article demonstrates a new revisited technique for the precise determinatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f600ecf28891aa8d45f2038d9c1e3dac
https://doi.org/10.15406/ipcse.2017.02.00036
https://doi.org/10.15406/ipcse.2017.02.00036
Autor:
Izzy Kutasov, Lev Eppelbaum
Publikováno v:
Open Geosciences, Vol 5, Iss 4, Pp 570-575 (2013)
The thermal conductivity of a geological formation is one of the important petrophysical parameters which are preferable to study in situ in geophysical well logs. A new technique for the determination of formation thermal conductivity has been devel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06fba7dcedbd277300733cddfbe2e03b
https://doaj.org/article/0a7382df457743abb96a07aca0993abe
https://doaj.org/article/0a7382df457743abb96a07aca0993abe
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
Geomaterials. :82-93
The most important data on the thermal regime of the Earth’s interior come from temperature measurements in deep boreholes. The drilling process greatly alters the temperature field of formations surrounding the wellbore. In permafrost regions, due
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65224791448e9ee67a6739404f8d5d08
https://doi.org/10.4236/gm.2012.24013
https://doi.org/10.4236/gm.2012.24013
Autor:
Izzy Kutasov, Lev Eppelbaum
Publikováno v:
Journal of Applied Geophysics. 73:278-282
As a consequence of drilling and completion operations most wells have reduced permeability near the borehole (skin zone). This may result in a corresponding change of thermal conductivity of formations near the borehole. At the same time the mathema
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7306c0b01fca1a0864fdb595a8119e2
https://doi.org/10.1016/j.jappgeo.2011.01.011
https://doi.org/10.1016/j.jappgeo.2011.01.011
Autor:
Lev Eppelbaum, Izzy Kutasov
Publikováno v:
Journal of Geophysics and Engineering. 8:R1-R10
In a vertical borehole, free heat convection arises when the temperature gradient equals or exceeds the so-called critical gradient. The critical temperature gradient is expressed through the critical Rayleigh number and depends on two parameters: (a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4236e0ea4bb71a2987aa39b7b159666f
https://doi.org/10.1088/1742-2132/8/1/r01
https://doi.org/10.1088/1742-2132/8/1/r01