Browsing by Subject "observation system"

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Особливості проведення сейсмічних робіт в транзитних зонах
(Data obrony: 2014-06-16) Melnychuk, Oleksandr
Wydział Geologii, Geofizyki i Ochrony Środowiska
The Master’s thesis contains theoretical basic of the offered technique and methodology of seismic works as well obtained practical calculations (multiplicity, the distance between the profiles of excitation points and center, distribution and leaching interference) that allowed to ground rational selection of the equipment and technical means performing field seismic works in the transition zone. Nowadays there are no universal technologies and methodologies for seismic survey in boundary shallow waters, so that is why it is significant to develop efficient technical and methodological ways of carrying out 2D and 3D seismic works on research of the transit zones and offshore areas. The necessity for development, implementing of the new modern technologies and the use of modern seismic equipment for extreme shallow water and in the transit zone is determined as the relevance of the Master's thesis. Based on the use of the modern software tools, such as seismic modeling package for complete wave modeling Tesseral-2D and 3D design software package of seismic surveys «Meza», the characteristics of the seismic records have been studied which were recorded in the transition zone as well a surface surveillance system designed for detailed studies has been estimated. The project development was carried out in the Mesa programming complex, as it provides enough opportunities for designing seismic surveys of various complexity and in different ways. However, we have taken the opportunity of joint evaluation of several design surveys to select the optimal scheme of studies. Such a scheme should provide the desired level of multiplicity in the junction area of land and waters. Due to the made calculations we have determined the parameters of the project orthogonal 3D grid taking into account the deep structure of research area. The quality of the obtained results is shown by the schemes of multiplicity azimuth and remote, as well as graphics with statistics section. The aim of the simulation was to evaluate differences between time-sections obtained in the land and water area. To achieve it the problem was solved using the program Tesseral by modeling the seismic field. Based on this problem, it was determined that depending on the location of seismometers wave field changed which was caused by the difference of physical and geological properties of the upper part of the section. Therefore, to ensure an identical wave field both on land and at sea it is necessary to eliminate the differences between the conditions of registration and make the necessary corrections. Exploration of fields in the specific natural conditions requires the use of more efficient technologies for seismic work, as well as creation of the desired technical means including amphibious vehicle grade. To master the techniques of planning and optimizing the parameters of 3D observations is one of the requirements for a qualified engineer and geophysicist with the leading companies in the industry.
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Проект детальних сейсмічних досліджень методом СГТ на площі Північної Долини Бориславсько-Покутської зони
(Data obrony: 2013-06-17) Savchuk, Vitalii
Wydział Geologii, Geofizyki i Ochrony Środowiska
Об’єкт дослідження – площа Північна Долина Бориславсько-Покутської зони. Мета роботи – розробка проекту сейсмічних досліджень 3D на площа Північна Долина. Головна задача геофізичних робіт – картування відбиваючих сейсмічних горизонтів у менілітових, бистрицьких і вигодських відкладах Північно-Долинської площі, для оконтурювання нафтогазоперспективних об’єктів, прогнозування продуктивних пасток вуглеводнів та підготовки виявлених об’єктів до глибокого буріння. Методика робіт – виконання об’ємної (3D) сейсморозвідки, заснованої на методі СГТ. В результаті проведення таких робіт будуть отримані первинні матеріали, які будуть оброблятися відповідними програмами обробки, для одержання чіткої інформації про будову даного району.