Unit 8 - Mapping Flashcards

1
Q

Quality of a map relies on?

A
  • The density and quality of the data
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2
Q

What is discrete data?

A
  • for example: well locations - they occur in one spot and are not connected between locations
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3
Q

What is continuous data?

A
  • Types of data that occur as a continuous surface or gradient between discrete points at which we know the value for these data → therefore these data can be represented by contours or a contoured surface on the map
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4
Q

What is a base map?

A

-A 2D representation of the area being mapped

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5
Q

What is most of the time taken as a datum for data?

A
  • Sea level
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6
Q

Difference Isopach and Isochore

A
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7
Q

What is important to keep in mind of the value “zero” in a thickness map?

A
  • because it only means, that the unit is not present, which means, that you are outside of the area where the unit has a positive thickness. → So in a thickness map, the zero contour occurs between the first positive values of thickness and the first zero values of thickness, and should not be drawn through all zero values
  • In an elevation maps, ‘zero’ = sea level, and is a unique value that has an associated contour
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8
Q

How do you call a line, that represents equal pressure?

A
  • isobar
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9
Q

How do you call a line, that represents equal temperature?

A

isotherm

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10
Q

What is the only time that you can see a true dip of the layers on a cross section?

A
  • only when the cross-section is drawn perpendicular to the strike or parallel to the dip direction
  • and it is not allowed that the cross section is vertical exaggerated
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11
Q

What does GRV stand for and what does it describe?

A
  • Gross Rock Volume
  • the total volume of rock between the mapped top surface that defines the top of the reservoir or potential reservoir and the hydrocarbon contact or expected hydrocarbon contact
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12
Q

When will we have bottom water in an oil-reservoir and when will we have edge-water?

A

If the reservoir is thicker than the column height, then the there will be bottom-water; if the reservoir is thin relative to the column height, then there will be edge-water

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13
Q

When do you know that there is no bottom water in the reservoir?

A
  • when the base of the reservoir is above the hydrocarbon contact
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14
Q
A
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