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  • At Shell we believe natural gas

  • is an important resource for energy future we also believe it must be

  • produced safely and responsibly

  • technology has made it possible

  • to access gas in oil trapped in tiny spaces in Shaler sand formations

  • deep under the earth this short video explains how we explore

  • drill and produce from a well we consider the geology

  • and local environment to carefully select the well location

  • this might include gathering seismic data

  • or information about air wildlife or nearby water sources

  • we work with the regulators to plan the site

  • then we begin by building the well pad for operations

  • during exploration we may draw a single well

  • are several wells to understand the gas or oil an area

  • when need rail we are careful to protect the surrounding area

  • including groundwater we install multiple layers have steel pipe also

  • called casing

  • and cement around each layer a pipe this is designed to isolate the gas and fluid

  • in the well

  • from the potable water table or drinkable water we typically drill

  • several kilometers

  • or more than a mile deep beneath the earth to reach the trapped hydrocarbon

  • formation

  • then to access gas or oil locked in shale rock

  • we drill horizontally remains different level designs

  • depending on the local underground conditions the entire drilling process

  • can take several weeks or even months for each well drilled from the pad

  • sensors in the drilling equipment fetus continuous data

  • as we drown once we reach the bottom of the well

  • we remove the trail and install steel pipe to the necessary

  • death based on our engineers design at the well this staff typically takes

  • only days with many safety checks along the way to be sure we have a good cement

  • job

  • and the well in casing integrity are secure this advanced drilling technology

  • is one of the keys that make it possible to reach more

  • the gas or oil trapped far below the surface within the shale

  • or Sam where after the well is drilled

  • we remove the red and prepare the well to begin the completions and hydraulic

  • fracturing process

  • this is the second key to extracting gas or oil trap

  • in tights and a shale rock hydraulic fracturing

  • is a very carefully controlled process that releases the hydrocarbon from the

  • tiny pockets

  • in which it is trapped we do not hydraulically fracture wells

  • unless we have successfully pressure tested for wellbore integrity

  • we lowered tool called a perforating gun

  • into the wellbore we feed it down to the target location in the well

  • a well-loved which gives a state about the well

  • helps us know just where to position the tool

  • once the perforating tool is in position the fire carefully calibrated charges

  • perforate the well casing UConn after wealth to the tights and our shale rock

  • layer

  • we inject a mix of fluids under pressure

  • mostly water with sand and chemicals to create fractures in the surrounding

  • shale rock

  • or tights and layer the San pops open the cracks

  • and allows the gas /url to better well into the well

  • when possible we treat and reuse the fluid will be covered during fracturing

  • to minimize the amount of water reuse we support the release of information about

  • chemical's use

  • in fracturing fluids we fracture the well

  • incitements four stages after each stage

  • we put in a temporary plug to separate the fracture stages

  • and prevent gas or oil from flowing too soon the number of stages will depend on

  • the local geology

  • we repeat this process until we have finished fracturing the link to the

  • target area

  • hydraulic fracturing and completing the well

  • typically lasts only a few days for each well when we are ready

  • we drill out the plugs this allows the gas or oil to flow into the well

  • that the well pad the flow is separated into gas and liquids

  • of the liquids might include oil or water

  • that was also locked in the rock deep below ground

  • we collect the water to be reused re injected or disposed of

  • according to local regulations the gas or oil continues to a pipeline

  • to provide energy

  • during exploration if no pipeline is nearby

  • we may need to temporarily flair or capture the gas

  • in short term facilities or store the oil in short term tanks on the location

  • if we decide to develop the area we typically put multiple wells

  • on a single pad reaching in different directions deep underground

  • to minimize disturbance to the surface

  • all our wells insight operations meet government rules

  • and our own rigorous standards for safety and protecting the environment

  • once drilling and completions are done

  • we remove most of our equipment and reduce the size of the well pad

  • a well typically can produce needed energy

  • for decades we inspect and maintain well sites regularly

  • during their productive life when the well is no longer producing

  • we comply with regulations to cement it closed

  • test that is sealed remove all equipment and structures

  • and reclaim the site to blend back into its surroundings

  • a permanent markers installed to mark the well location

At Shell we believe natural gas

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B2 gas shale oil pad drilling tights

Life of an onshore well: finding and producing tight or shale oil and gas

  • 129 9
    richardwang posted on 2014/03/30
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