Oil and gas traps oil on my shoes – the original petroleum geology site! monroe la gas prices


Most oil and gas electricity research centre deposits are found in sandstones and coarse-grained limestones. A piece of sandstone or limestone is very much like a hard sponge, full of holes, but not compressible. These holes, or pores, can contain water or oil or gas, and the rock will be saturated with one of the three. The holes are much tinier than sponge holes, but they are still holes, and they are called porosity.

The very electricity deregulation map fine-grained shale we talked about previously is one of the most common sedimentary rocks on earth. In many places, thousands upon thousands of feet of shale are stacked up like the pages in a book, deep underground. It is not unusual to have layers in the earth’s crust made up mostly of shale that are 4 miles thick. These shales were deposited in quiet ocean waters over millions of years time.

During much r gas constant of the earth’s history, the land areas we now know as continents were covered with water. This situation allowed tremendous piles of sediment to cover huge areas. The oceans may have left the land we now live on, but the great deposits of shale and sandstone remain deep underground 1 unit electricity cost in tamilnadu….right under our feet! The Tiny Gigantic Kingdom

A lot of other material is deposited along with the clay or mud-sized sediments. We often think of sharks and whales as being the kings of the deep oceans. Actually, there are other animals that have established giant kingdoms in the sea…the largest and most impressive kingdoms of all! These animals j gastroenterol hepatol are the various kinds of microscopic creatures….both plant and animal. Most of them would fit on the head of a pin. They are tiny, but there are uncountable trillions of them.  When these creatures die, they sink to the bottom and become part of the sediments there that will eventually turn into shale.

At first, the oil and gas only exist between the shale particles as extremely tiny blobs, left over from the decay of the tiny animals.  Then, the intense pressure of the earth squeezes the oil and gas out of the shale, and the oil and gas fluids gather electricity generation in india together in a porous layer and move sideways many miles. On their way, they may meet up with other traveling oil or gas fluids.

These traps hold oil and gas because the earth has t gastrobar been bent and deformed in some way. The trap may be a simple dome (or big bump), just a “crease” in the rocks, or it may be a more complex fault trap like the one shown at the right. All pore spaces in the rocks are filled with fluid, either water, gas, or oil. Gas, being the lightest, moves to the top. Oil locates gas bloating pregnancy right beneath the gas, and water stays lower.

Stratigraphic traps are depositional in nature. This means they are formed in place, often by a body of porous sandstone or limestone becoming enclosed in shale. The shale keeps the oil and gas from escaping the trap, as it is generally very difficult for fluids (either oil or gas) to migrate through shales. In essence, this kind of stratigraphic trap is surrounded by “cap rock.”

The stratigraphic trap shown at the lower left is a cool one. It was formed when rock layers at the bottom were tilted, then eroded flat. Then more layers were formed gastroenterology horizontally on top of the tilted ones. The oil moved up through the tilted porous 850 gas block rock and was trapped underneath the horizontal, nonporous (cap) rocks. Another Stratigraphic Trap

You might drill into a reservoir that has been depleted (all the oil and gas removed) by another well. There may be a new infill reservoir between two wells that could be developed with a third well. Or one duke electric orlando that was incompletely drained. Maybe if you drill a little deeper you might hit a deeper pool reservoir! You might be able to back up and produce a bypassed compartment. The petroleum geologist has to think of all these things when planning a new well!

Answer: The oil reservoir has been split in two by the fault, which is nothing but a place in the earth where rock layers break in two.  The arrows on the diagram show that the rocks moved DOWN on the LEFT side of the fault and UP on the RIGHT side of the fault.  This electricity song created a GAP in the oil field……right where you drilled your second hole! Incredibly bad luck! Or, bad seismic! Your second hole is a DRY HOLE.