Re: Offshore Drilling

Highly unlikely. The magnitude of VOLUME extracted from the reservoir rock is way too small to change things except strictly locally. Reservoir rock seldom has as much as 30% porosity, and of that, we can, at best, recover 50%, so perhaps we can remove 15% of the reservoir volume, but only if we replace the oil volume with salt water. World wide oil production (100 million BPD) equals about 4.2 cubic kilometers/day, and this is very concentrated. Oil reservoirs are much less than 0.1% of the earth surface area. The volume extracted is about 2.7 x E-8 percent of the earths crust to a depth of 3 KM. So, IF we have been extracting at that rate for 50 years (17250 days), then total volume of oil extracted to date is 0.000473% of the earth's surface crust (to 3 KM depth).

Density will affect velocity not magnitude.

As a Drilling Superintendent for over thirty years off drilling experience I would like to inform all readers to the wt. design of extraction and the reimplementing of the exact density to insure a orginal state. Also when we reitre a well the calulations and chemical compounds closely similar to what was exatracted. My company International Fluid Analysts ins has been around since the 70s and if anyone would like to discuss the downhole situation in any detail please email me at spartancp@hotmail.com Chris Poloynis

Hello oyvind.johannessen,

If a shock wave hit an oil pocket in the earths mantle, would the energy be the same after it went through the oil pocket?

If the rock matrix has a 30% porosity then no it would not. It would spread the pressure wave out. The rock matrix would not transfer the energy at the same speed as the oil or water, dividing its power. How much? You would have to ask a oil exploration geologist. As a guess the difference between the rock and the oil is greater than the oil and the water.

Brad

<...increase extracting oil and replacing it with seawater...>

...thereby increasing the mass at lower levels within the mantle. Surely the globe's spin should increase as a result? If so, then why are leap-seconds being added to clocks?