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The θEPT and θND overlay technique has been tried and found to be quite succesful in distinguishing between hydrocarbon and water zones in fresh water Tipam and Girujan sands, some of which could have been easily overlooked other wise, in a number of Upper Assam oilfields. The EPT-MSEL combination offers reliable values of m which could be utilized for estimation of more accurate values of water saturation...
A new detection method for DC line faults in a voltage source Converter based three terminal high voltage DC (VSC-MTDC) systems is proposed in this paper. A three-terminal MTDC model is used to investigate fault behavior and detection of type of fault and the dc line of the model where fault has occurred using the simulation program MATLAB/SIMULINK. The fault clearing must be done very rapidly, to...
This paper presents a robust nonlinear controller for VSC-HVDC transmission link using nonlinear sliding mode control strategy. The sliding mode control offers invariant stability to modeling uncertainties due to converter parameter changes, changes in system frequency and exogenous inputs. Comprehensive computer simulations are carried out to verify the proposed control scheme under several system...
Vitrinite reflectance is an important index used in assessment of thermal maturity of petroleum source rocks. Vitrinite reflectance typically increases with depth of burial as a function of time and temperature and is accompanied by a decrease in log-derived interval transit time. The relationship between these parameters has been investigated in the Upper Assam (Tertiary) Basin, India. An equation...
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