http://localhost:8081/jspui/handle/123456789/114 2026-05-07T20:58:12Z 2026-05-07T20:58:12Z Chanda, Sanjoy http://localhost:8081/jspui/handle/123456789/18778 2026-01-29T11:55:47Z 2014-06-01T00:00:00Z

Title: FRACTAL ANALYSIS OF WELL LOG DATA Authors: Chanda, Sanjoy Abstract: This dissertation presents an efficient method to analyze Well Log data using fractal concepts. The program designed for applying this method to well log data generates IFS images and corresponding images of coarse graining with data selected by a specific data window having a definite shift. This is how the entire data range is scanned and outputs are generated. One must judiciously choose the value for the window size and the window shift to obtain optimum results. The well data used in this dissertation is synthetic data but the idea can be extended to real well log data as well. The main purpose of this dissertation was to fmd a fractal pattern in IFS images of well log data especially for hydro carbo n- bearing wells. Thus, the data synthesized was for hydrocarbon wells only. We have achieved very good fractal patterns in our data and can say that well log data of hydrocarbon bearing wells exhibit fractal behaviour.

2014-06-01T00:00:00Z Patel, Shailesh http://localhost:8081/jspui/handle/123456789/18772 2026-01-29T11:55:08Z 2014-06-01T00:00:00Z

Title: EVALUATION OF SITE EFFECTS USING STRONG MOTION KIKNET DATA Authors: Patel, Shailesh Abstract: The level of safety of building during an earthquake depends on various factors like subsurface geology, topography, subsoil condition, building morphology. And overall intensity of earthquake in any region depends on damage in the region. The damage can happen even due to minor earthquake because of the fact that study of subsurface soil is not done prior to the creation of the building. The match of frequency of the structure with the predominant frequency of the soil column beneath the structure lead to the phenomenon of resonance and this condition is disastrous. We have example of Bhuj earthquake in 2001. Each site has a frequency depending upon the geological structure of the region, the type of - soil present, and the thickness of the soil layers and also on the ground water level. Also the manmade structures like buildings and mega-structure like dam, bridges, flyovers etc have their own frequencydepending upon the size, shape, type of material used. The predominant frequency of the soil column is the frequency at which, during an earthquake, the ground motion is likely to increase the amplitude. This may cause more damage in the region.

2014-06-01T00:00:00Z Singh, Shiv Pratap http://localhost:8081/jspui/handle/123456789/18768 2026-01-29T11:54:38Z 2014-06-01T00:00:00Z

Title: INVERSION OF GEOPHYSICAL DATA AND RESERVOIR CHARACTERIZATION Authors: Singh, Shiv Pratap Abstract: Reservoir characterisation study of a part of area belonging to a western onshore field in India was undertaken using concepts of seismic inversion to find the probable hydrocarbon accumulations. Process of pre-stack inversion of seismic data has been carried out to generate Pimpedance and Vp/Vs volumes. From the Rock physics analysis of well log data, it was observed that it was not possible to discriminate the hydrocarbon sands from the rest of the lithologies in P-impedance and Vp/Vs domain. So, the Bayesian probabilistic route was taken for the identification of most probable hydrocarbon bearing geo-bodies, as there was a considerable overlap in various litho-facies. One sizeable and most probable hydrocarbon geo-body has been extracted in the area which lies in the north eastern region of the field. Four other clusters of hydrocarbon bearing geo-bodies are captured in the south-western region.

2014-06-01T00:00:00Z Godara, Sudhanshu http://localhost:8081/jspui/handle/123456789/18767 2026-01-29T11:54:28Z 2014-06-01T00:00:00Z

Title: ELASTIC IMPEDENCE: MODELLING AND INVERSION Authors: Godara, Sudhanshu Abstract: Elastic impedance is a generalization of acoustic impedance for nonnormal angles of incidence; whereas Acoustic impedance is valid for normal incidence. Elastic impedance provides a absolute and consistent framework to calibrate and invert non-zero offset seismic data same as Acoustic impedance does for zero offset data. Elastic impedance, which is an approximation derived from a linearization of the zeoppritz equations, is accurate enough for widespread application. Elastic impedance depends on incidence angle. For non- .4 normal incidence elastic impedance can be expressed in terms of Elastic impedance. Elastic impedance for p-wave also depends upon S-wave velocity. Its been suggested that elastic impedance inversion of data gives better results. Elastic impedance gives a easy mechanism to produce synthetic seismogram for variable incidence angle. In the present work presented synthetic seismogram have been produced and inverted using aki-richards approximation and the elastic impedance concept for a number of earth models. It has been found that there is no essential difference between the aki-richard inversion and inversion based on elastic impedance when results are compared in terms of AVO attributes A and B.

2014-06-01T00:00:00Z