Fuel Geology — DU B.Sc. (Hons.) Geology Previous Year Question Papers

: Fuel Geology Semester .: VI (DSC-17), Answer any five questions in all and attempt a minimum of two questions from each Section. Section A : Petroleum Geology 1. Answer the following in brief: (a) What is the geological age of Cambay basin H/C reservoir rocks ? (b) What is spill point? -(c) What is the API value of crude oil? (d) What is effective porosity? (e) What is the temperature range of an oil window ? (f) How does time play a role in hydrocarbon generation ? Wriat,is the range of specific gravity of hydrocarbons .? Write the name`of an ofl field where the source rock is also acting as . a I.eseryoir rock. (i) How does buoyaney develop in a reservoir rock? (a) Discuss the Grit?ria for a rock to ba classified as a source rock for hydrocarbons. (a) Discuss the role of oxic and anoxic environments in deposition of hydrocarbon source rocks. (c) Explain the stagnant model of organic `miterial deposition, with € Write short notes on-any fbree of the following : Development of the non-elastic reservoir locks with Indian examples. Effect of te-mperature on the porosity and permeabhity of reservoir i rocks. Geological settings, of Calnbay Basin and its hydrocarbon potential. Role of plate tectonics in the distribution of hydrocarbon reservoirs. Discuss in detafl any froo of`the following : (c[) Types of Kerogen and their role`in hydrocarbon geperition with va^n ELevelen diagram. (a) How does hydrodynainic flow, coupled with buoyancy, affect the migration -of hydrocarbons .in a reservoir rock ? (c) `Abiotic origin of hydrocarbons and its limitations. Section B : Coal Geology Write short notes on any three of the following : (a) Macrolithotypes of hard coal and their application in coal utilization (b) Principle of underground coal gasification and also comment upon its advantages and disadvantages (c) Proximate analysis of coal (d) Rank, grade and types of coal. 6. Define classifying criterion for maceral groups, and also enumerate the diagnostic properties of each maceral groups. Explain Liptinite group of macerals in detail and comment on the importance of fluorescence microscopy in maceral study. Explain the methods of direct and indirect coal liquefaction and enumerate their merits and demerits. Comment on the status of present scenario of coal liquefaction in India and its need to secure energy security of India. Discuss coal bed methane (CBM) in terms of their geological settings, production, environmental hazards and its prospect in India. Discuss parameters of a coal seam to be suitable for CBM accumulation. Enlist the major differences between coal bed methane (CBM) and conventional gas reserves.