Gravity survey:

In places where the instrument detects stronger or weaker than normal gravity forces, a geologic structure containing hydrocarbons may exist.

Terms Related to Gravity survey

• Magnetic survey

  An exploration method in which an instrument that measure the intensity of the natural magnetic forces existing in the earth's subsurface is passed over the ...

• Gravity – api

  The specific gravity or density of oil expressed in terms of a scale devised by the american petroleum institute. The lighter the oil, the greater ...

• Gravity drainage

  The movement of fluids in a reservoir resulting from the force of gravity. In the absence of an effective water or gas drive, gravity drainage ...

• Hydrometer

  An instrument with a graduated stem, used to determine the gravity of liquids. The liquid to be measured is placed in a cylinder, and the ...

• Directional survey

  A logging method that records rift angle, or deflection from the vertical, and direction of the drift. A single-shot directional-survey instrument makes a single photograph ...

• Heavy crude oil

  Heavy crude oil or extra heavy crude oil is any type of crude oil which does not flow easily. It is referred to as "heavy" ...

• Density

  The mass or weight of a substance per unit volume. For instance, the density of a drilling mud may be 10 pounds per gallon (ppg), ...