99. Petroleum is originated from:i) Sedimentary organic matterii) Sedimentary inorganic matteriii) Metamorphic rocksiv) Igneous rocks100. Which one of the following Types of organic matter is considered best for oil generation:i) Type Iii) Type IIiii) Type IIIiv) Type IV101. Two main classes of biomarkers present in petroleum are:i) Carbonates and sulphatesii) Chlorides and nitratesiii) Carbon di-oxide and ammoniaiv) Terpanes and steranes102. Quality of the organic matter is improved by:i) Increased oxygen and decreased hydrogen concentrationsii) Increased carbon di-oxide and decreased nitrogen concentrationsiii) Increased hydrogen and decreased oxygen concentrationsiv) Increased nitrogen and decreased carbon di-oxide concentrations103. Complex molecular fossils derived from once living organisms, which are found in source rocks and oils are known as:i) Stable isotopesii) Biomarkersiii) Hydratesiv) Sulphates104. Hydrocarbon generation potential depend on:i) Abundance of the sedimentary organic matterii) Type and quality of the organic matteriii) Thermal maturity of the sedimentary organic matteriv) All above105. The instrument used for the screening of sediments to know the quality and quantity of the organic matter in it is known as:i) Gas Chromatographii) Mass Spectrometeriii) High Pressure Liquid Chromatographiv) Rock-Eval

106.Permeability is a rock property(True / False)

107.The sum of effective permeability is never equal to absolute permeability (True/ False)

108.It is always preferred to start water injection near bubble point.(True/ False)

109.Under saturated reservoirs have gas cap.(True / False)

110.Oil viscosity is maximum at bubble point(True/ False)

111.Formation volume factor is maximum at bubble point(True/ False)

112.Gravity drainage reservoirs normally have high recovery factors(True/ False)

113.Water active gas reservoirs give low recoveries(True/ False)

114.Reserve estimates are dynamic in nature(True/ False)

115.Heavy oil reservoirs are normally good candidates for thermal recovery (True/ False)

116.What factor controls the porosity of the rock?a. fabric,b. Packing of grainsc. mineralogyd. Fossil content117.Most common type of porosity in sandstone reservoir is:

a. Primaryb. Secondaryc. Fractured. All above

118.Petrographic study of rocks lead to understanding of:

a. Textureb. Mineralogyc. grain sized. All above.

119.Study of fossils in rocks help in determining:a. age of rocksb. depositional environmentc. Bathymetryd. all above

120.To know the presence of clay in rocks, we use the following techniques:a. X-Ray diffractometry (XRD)b. X-Ray Fluorescence (XRF) c. Petrographyd. Cathodo luminescence (CL) microscopy.

121.Study of cores / outcrop samples can help in understanding:

a. Rock typesb. Grain size variationc. Depositional environmentd. All above

122.Scanning Electron microscopic (SEM) studia can help in understandinga. Pore sizesb. Pore thwatsc. Pore filling materialsd. all above

123.In India onset of deepwater regime starts from the bathymetry of:a. 100mb. 200mc. 300md. 400m

124.Cost of one exploratory deepwater well is approximatelya. 100,000 $b. 1,000,000 $c. 25,000,000 $d. 25,000,000,000 $

125.The recent discoveries in Indian deepwater are from:a. Krishna-Godavari basin b. Kutch basinc. Bombay basin

126.Gas hydrates are identified on the basis of:a. Bright spotb. BSRc. Dim spotd. Anticline

127. A sinusoid of 200 Hz sampled at 4 msec will be aliased to a lower frequency ofa) 100 Hzb)125 Hzc)150 Hzd)175Hze)will not baliased

128. Auto correlation of a wavelet is characterized bya) Zero phase b)Min. phase c)Mixed phase d)Max Phase e)None of above

129. Convolution in time domain is equivalent to which of following in frequency domaina) Division b)Multiplication c)Additiond)Subtraction e)Deconvolution

130. Deconvolution of seismic data is attempted for achieving which of following objectivesa)Demultiple b) Filtering c)Spectral Enhancement d)Statics e)All of these