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Sagaydachny A.V.,SNIIGGiMS | Dergach P.,Trofimuk Institute of Petroleum Geology and Geophysics | Salnikov A.,SNIIGGiMS
12th Conference and Exhibition Engineering Geophysics 2016 | Year: 2016

The results of near-surface seismic experiments with the high-frequency source on piezoelectric elements are presented in this paper. It has demonstrated that the first brakes of refracted waves can be correlated in offsets about 300 meters. The results show high resolution of the obtained data and that the method is better in wave generation that the traditional methods of wave generation. Source

Duchkov A.A.,Trofimuk Institute of Petroleum Geology and Geophysics | Karchevsky A.L.,RAS Sobolev Institute of Mathematics
Journal of Applied and Industrial Mathematics | Year: 2013

Under study is the problem of estimation of the terrestrial heat flow from the temperature measurements in the bottom sediments. The problem is divided into the two subproblems: first, we solve the one-dimensional inverse problem of estimating the heat conductivity λ and, second, compute the heat flow value by solving the direct stationary problem using the just-found value of λ. We develop a sweep method for solving the direct problem which differs from the standard. An optimization approach is used for solving the inverse problem, and the explicit formulas are obtained for computing the gradient of the error functional. We analyze the factors that cause errors in estimating the heat flow. We show that the main contribution to the errors is given by the presence of harmonics with the periods exceeding the temperature monitoring time interval. We show that if the parameters of the harmonics are known then we can calculate some corrections for the obtained value of the heat flow. The results were applied to the data of temperature measurements carried out at the bottom of Lake Teletskoye from June of 2008 to September of 2010. For finding the long-period harmonics, we use the meteorological data about the bottom water temperature from 1968 to 2011. This allowed us to estimate the heat flow through the bottom of Lake Teletskoye as well as the thermal diffusivity in the upper layer of the sediments. © 2013 Pleiades Publishing, Ltd. Source

Nesterova G.V.,Trofimuk Institute of Petroleum Geology and Geophysics | Yeltsov I.N.,Russian Academy of Sciences | Nazarov L.A.,Russian Academy of Sciences | Nazarova L.A.,Russian Academy of Sciences | Surodina I.V.,Russian Academy of Sciences
16th Science and Applied Research Conference on Oil and Gas Geological Exploration and Development, GEOMODEL 2014 | Year: 2014

Influence of unequal component natural stress field on water saturation, salt concentration, electrical resistivity and VIKIZ and BKZ logs are numerically simulated. 3D numerical models of mud filtration under stress-strain state and VIKIZ and BKZ logs developed by authors are used. Difference between lateral pressure factors in orthogonal direction have considerable impact on responses of certain probes of VIKIZ and BKZ tools. Probes of different length have another response. This fact can explain different reservoir estimation by interpretation of different borehole sounding methods as well as provide the groundwork for estimation of geomechanical rock properties. Source

Xuan P.T.,Vietnam Academy of Science and Technology | Van Pho N.,Vietnam Academy of Science and Technology | Gas'kova O.L.,RAS Institute of Geology and Mineralogy | Bortnikova S.B.,Trofimuk Institute of Petroleum Geology and Geophysics
Geochemistry International | Year: 2013

This study provides an assessment of the environmental impact of open pit mining operations at the Cay Cham titanomagnetite-ilmenite deposit (northern Vietnam). The results of surface water sampling indicate the formation of acid mine drainage and contamination of adjacent areas by heavy metals (Cu, Zn, Ni, and Mn). The acid mine drainage is produced by oxidation leaching of sulfide minerals associated with primary mineralization owing to the low neutralization potential of the natural waters in the humid environment of tropical rainforest. The study showed that alternating dry and wet seasons typical of this climatic region promote the generation of stored acidity leading to a sharp decrease in pH of drainage water during the wet season and result in the negative impacts of this mine on both flowing and stagnant surface waters. © 2013 Pleiades Publishing, Ltd. Source

Chichinina T.I.,Mexican Institute of Petroleum | Hogoev E.A.,Trofimuk Institute of Petroleum Geology and Geophysics | Reyes-Pimentel A.,National Autonomous University of Mexico
76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014 | Year: 2014

A new method of spectral analysis of 'hydrocarbon tremors' (microseisms) is developed for seismic exploration of oil and gas. As an input data this method uses standard 3D seismic reflection data. In comparison with other methods of passive seismology, this method does not require any specific field acquisition and devices, since the input data can be extracted from conventional seismic reflection data. The know-how of the method is in using the time intervals in the wave records before the first arrivals, as input data for the method. Then, we have developed the method furthermore by using the intervals of seismic traces corresponded to the latest times, that is after all the reflection-waves' events. As an example, an algorithm is presented by its application to Oriental Siberia data. There is a strong correlation of the tremor spectrum intensity with the oil/gas pay-zone location. In the well perforated following our prognosis, substantial gas flow has been obtained with an excellent production rate. Source

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