Sentence examples for shale layer from inspiring English sources

A first well drilled into the shale layer from their farm back in the early 1950 gave the Bakken Formation its name.

In essence, the rigs can now go down to the level of the oil-bearing shale layer and then turn 90 degrees to drill horizontally.

We have a shale layer over the limestone, too, which makes the mine extremely dry.

The thickness of the mudstone (or shale) layer reaches 40 m in the study area.

The even-numbered layers allowed no seepage and represented a stable shale layer between the sand strata (Fig. 2).

There is a shale layer of about 0.5 m thick at 3 m height above floor of the seam.

Fracking shale is accomplished by drilling horizontal wells that extend from their vertical well shafts along thin, horizontal shale layers.

Breakthroughs in drilling techniques allowed long wells to be drilled horizontally through shale layers more than a kilometre below the surface.

But there's now more vital reading for anyone interested in understanding the reasons for the U.S.-centric surge in oil and gas extraction from such shale layers, which exist in many places around the world.

The plan, as described by senior state officials to Hakim, is to proceed only in the deeper parts of the Marcellus Shale, the subterranean rock formation that holds vast amounts of gas, and only in communities that support gas drilling — which would unavoidably involve the productive but contentious process of hydraulic fracturing, or fracking, of the shale layers deep underground.

This technology holds great potential to lower the "dread to risk ratio" surrounding the hydraulic fracturing process, in which water with traces of other substances is injected into a well at high pressure to fracture deep shale layers holding the gas.