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EN
The acquisition parameters and methodology of seismic data processing for high-resolution seismic imaging viewed through relative amplitude preservation are presented. An example of the obtaining of high-quality, shallow seismic data with a variable end-on spread is shown. The source used for the project is an accelerated weight drop. The study area lies within the mine waste disposal area, near Rudna village (Fore-Sudetic Monocline, WS Poland), and results are given for a 2D experimental profile. The aim of the project was to design optimal acquisition and processing parameters for the detailed recognition of Tertiary deposits. The proposed acquisition parameters are a compromise between time, cost and results. High-resolution seismic imaging enables the determining of layers within the range of thicknesses between 5 and 15 m, while the maximal depth of imaging reaches 400 m.
EN
High-resolution seismic survey was conducted to investigate acoustic characteristics of gassy sediments along the southern shelf of the Sea of Marmara. The acoustic turbidity zones outlined within the study area are generally below 2-9 m (2-10 ms TWT) the seafloor whilst this vertical distance varies between 9 and 21 m (10-25 ms TWT) for acoustic blanket type reflections. The gassy sediments cover an area of sea floor of about 45, 110, and 75 km2 in front of Gönen River, Kocasu River, and Gemlik Bay, respectively. The gassy sediments in the center of Gemlik Bay exhibited an elliptical geometry similar to its basin while the others have deltaic forms in front of the rivers. The sea bottom and near surface sedimentary units are made-up of organic-rich sediments, mostly transported by the southern rivers. The gas observed in sediments is thought to be of biogenic origin, which may be caused by degradation of organic matter in the sediment.
EN
This paper shows the results of seismic research on some problems of sulphur in-situ mining. The difficulties during exploitation were mainly connected with the lack of detailed information on the structure and tectonics of deposit and overburden strata. This kind of information could be obtained using the High Resolution Seismic method. The use of seismic method allows to determine the range of subsidence provoked by well mining of sulphur. It is very important to undertake the measurements before exploitation, because the comparison of seismic sections before and during exploitation creates a possibility of determining the process of changes in the structure of the deposit and overburden strata. Another problem is a possibility of determining the source of uncontrolled flows of technological water. The water saturated zones are observed on seismic records as zones without reflections and with decay of seismic energy. Two examples of the seismic investigation conducted on the well mining of sulphur area are presented. Both are connected with the danger to main road on the surface caused by uncontrolled flow of technological water.
EN
The high resolution seismic (HRS) reflection survey was conducted on an experimental site in eastern France. Three profiles were designed in order to check the detectability of salt-mining cavities at depth range of 110-180 m. The detection and location of cavities on the HRS images are based on indirect symptoms corresponding to cavity-induced perturbations of lower markers. In most cases, the cavities were detected and the accuracy of estimation of horizontal extensions of the cavities was surprisingly good (of about 10 m). The accuracy of vertical positioning is difficult to establish when the detection is performed indirectly and the only information that could be derived is that a cavity is beyond the masked geological interface. The detection ability depends on the size of the cavity in regard to wavelength and depth. These factors are included in AN coefficient which was used in order to evaluate the detectability of a given cavity.
PL
W pracy przedstawiono możliwość zastosowania atrybutów sejsmicznych w interpretacji badań sejsmicznych o podwyższonej rozdzielczości przeprowadzonych na terenie kopalni siarki w Osieku. Eksploatacja złóż siarki metodą otworową może powodować degradację powierzchni i poziomów wodonośnych. Zagrożenia te mogą być ograniczone poprzez prowadzenie bezpiecznej eksploatacji, w której proces wytapiania siarki jest pod stałą kontrolą. Przeprowadzane okresowo badania sejsmiczne pozwalają na określenie zmian zachodzących w ośrodku pod wpływem eksploatacji. Informacje te odgrywają dużą rolę zarówno w planowaniu eksploatacji, jak również w ochronie środowiska. Zastosowanie atrybutów daje możliwość lepszego odwzorowania złoża i jego nadkładu oraz zmian wynikających z eksploatacji
EN
In his paper the evaluation of possibilities for seismic attributes in interpretation of high-resolution seismic section from sulphur mine in Osiek has been undertaken. Exploitation of sulphur deposits by melting with special well-system can destroys surface and water-bearing level. These threats could be reduced by safe exploitation, in which sulphur melting and processes connected with it are under permanent control. The application of periodic seismic profiling helps us define changes in formation resulting from the exploitation. The information is very important both in planning exploitation and in environment protection. Using seismic attributes gives us a better representation of deposits and overburden, and changes subsequent to exploitation too
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