19/21 PCBPDB 1023 88. Select the FALSE statement about sea bed logging (SBL). A.

Question

19/21 PCBPDB 1023 88. Select the FALSE statement about sea bed logging (SBL). A. SBL is a marine electromagnetic method that has the ability to map the subsurface resistivity remotely from the sea floor B. SBL has the potential to distinguish a hydrocarbon filled and a water filled reservoir. C. The basis of SBL is the use of gravity anomalles. D. SBL uses mobile horizontail electric Dipole (HED) source and an array of seafloor electric field receivers. 89. How do you justify the variation in the diameter of a hole at different depth? A By identifying the presence of cave-ins B. By identifying the development of mud cakes on the wellbore wall. C. By identifying fractures on the wellbore wall D.A & B. 90.If a certain lithology appears in wireline logs but not in cuttings samples, what will be your quick-look conclusion about the lithology? A. Possibly it is consolidated sand or silt. B Possibly it is loose sand or silt C. Possibly it is soluble evaporate 91. Neutron log is not useful t A. Measure porosity B Discriminate between gas and oil C. Identify lithology Calculate water saturation 92 There are types of rotary coring equipmant 93 Th ypes of coring alli Three

Explanation / Answer

88. C. The basis for SbL is the response to electromagnetic radiation not the gravity anamolies.

89. B . By identifying the development of mud cakes on the wellbore wall

90. D. Possible soluble evaporate or it is loose sand or silt.

91. B. The neutron log is not useful to discriminate between gas and oil.

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