mitis - Pressure can be caused in many manners. Please note the ANN did not indicate what was found. If the cause was petroleum based (gas or oil) they would be running flow test and would be happy to announce the find, log it, and continue the drill process.
I am not saying it was gas or oil based. I am saying they did not say what caused the pressure.
Pressure is the force that a fluid (liquid or gas) exerts uniformly in all directions within a vessel, pipe, hole in the ground, and so forth, such as that exerted against the inner wall of a tank or that exerted on the bottom of the wellbore by a fluid. pressure is expressed in terms of force exerted per unit of area, as pounds per square inch, or in kilopascals.
Bob
The following is a brief types of pressure found in drilling. Hydrostatic pressure The force exerted by a body of fluid at rest. it increases directly with the density and the depth of the fluid and is expressed in pounds per square inch or kilopascals. the hydrostatic pressure of fresh water is 0.433 pounds per square inch per foot of depth (9.792 kilopascals per meter). in drilling, the... Pressure gradient 1. A scale of pressure differences in which there is a uniform variation of pressure from point to point. for example, the pressure gradient of a column of water is about 0.433 pounds per square inch per foot (9.794 kilopascals per meter) of vertical elevation. The normal pressure gradient in a formation is equivalent to the... Normal formation pressure Formation fluid pressure equivalent to about 0.465 pounds per square foot of depth from the surface. if the formation pressure is 4,650 pounds per square inch at 10,000 feet, it is considered normal.... Absolute pressure Total pressure measured from an absolute vacuum. it equals the sum of the gauge pressure and the atmospheric pressure corresponding to the barometer (expressed in pounds per square inch).... Mud density Weight per unit volume of drilling fluid usually expressed in pounds per gallon or pounds per cubic foot. Reservoir pressure The average pressure within the reservoir at any given time. determination of this value is best made by bottomhole pressure measurements with adequate shut-in time. if a shut-in period long enough for the reservoir pressure to stabilize is impractical, then various techniques of analysis by pressure buildup or drawdown tests are available to determine static [...]
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