A] Movement of hydrocarbon out from source to reservoir rock [carrier bed] is ca

Question

A] Movement of hydrocarbon out from source to reservoir rock [carrier bed] is called: a) Primary migration. b) Secondary migration c) Tertiary migration d) Re-migration. e) None of the above. The land-based instruments can measure gravity anomalies with: a) Greater accuracy, precision, and resolution than seismic. * a. B] Lesser accuracy, precision, and resolution than seismic. c) Equal accuracy, precision, and resolution to seismic. d) None of the above. e) All the above C] Basement and igneous rocks are characterized by a) High density field compared with sandstones b) Equal density field compared with sandstones. c) Low density field compared with sandstones. d) All of the above. e) None of the above. Herringbone sedimentary structure is indicator of a) Wind dominated depositional system. b) Tide dominated depositional system. c) River dominated depositional system. d) Storm dominated depositional system e) None of the above. a. D] E] Hummocky stratification sedimentary structure is indicator of a) Storm dominated depositional system. b) Wave dominated depositional system. c) River dominated depositional system. d) Tide dominated depositional system e) Glacier dominated depositional system.

Explanation / Answer

1. Secondary migration. The movement from one position to another in the reservoir rock or carrier bed is called secondary migration.

2. Great accuracy precision, and resolution than sesmic.
3. High density field compared with sandstone. The density of basement and igneous rock are around 2.7 g/cm3
and that of sandstone is 2.23 g/cm3

4. Tide dominated deposition system. In tidal areas, which have bidirectional flow, structures are formed with alternating layers of cross-beds dipping in opposite directions that reflect the alternating paleocurrent.

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