Hydraulic fracture thesis

The technique is relatively expensive, however, since the water must be treated before each reuse and it can shorten the life of some types of equipment.

Further research is needed to identify both carcinogenic potential of chemicals used in hydraulic fracturing and their cancer risk. Natural gas may only be vented for safety reasons.

In areas where that is not an option, it may be treated and reused or processed by a wastewater treatment facility and then discharged to surface water. Children, active young adults who spend time outdoors, and the elderly are particularly vulnerable. The main enabling technologies, hydraulic fracturing and horizontal drilling, have opened up new areas for oil and gas development, with particular focus on natural gas reservoirs such as shale, coalbed and tight sands.

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The risks, to some, are overplayed and the current research is insufficient in showing the link between hydraulic fracturing and adverse health effects, while to others the risks are obvious and risk assessment is underfunded.

In the UK, total gas security is required, and venting of methane is only permitted in an emergency. Use of water for hydraulic fracturing can divert water from stream flow, water supplies for municipalities and industries such as power generationas well as recreation and aquatic life.

Potential risks are " methane emissions from the wells, diesel fumes and other hazardous pollutants, ozone precursors or odours from hydraulic fracturing equipment, such as compressors, pumps, and valves".

Some studies have found that hydraulic fracturing has higher emissions due to methane released during completing wells as some gas returns to the surface, together with the fracturing fluids. These microseismic events are often used to map the horizontal and vertical extent of the fracturing.

Inthere were 50 earthquakes greater than magnitude 3. Additional water is used when wells are refractured. Deeper coal formations might require hydraulic fracturing to release the natural gas. Today the methane is captured and used as a source of energy.

Average land impact per well was 3 hectares about 7 acres [85] Research indicates that effects on ecosystem services costs i.

The Process of Unconventional Natural Gas Production

Unless natural fractures are present, almost all tight sand reservoirs require hydraulic fracturing to release gas. Indigenous and agricultural communities may be particularly impacted by fracking, given their historical attachment to, and dependency on, the land they live on, which is often damaged as a result of the fracking process.

Air emissions[ edit ] A report for the European Union on the potential risks was produced in Tight sands are gas-bearing, fine-grained sandstones or carbonates with a low permeability. OSHA has also raised concerns about the long-term respiratory effects of occupational exposure to airborne silica at fracking sites.

Depending on their treatment, the well-to-burner emissions are 3. In France and Vermont for instance, a precautionary approach has been favored and hydraulic fracturing has been banned based on two principles: Fractures are created by pumping large quantities of fluids at high pressure down a wellbore and into the target rock formation.

Production of Coalbed Methane. Concern has been raised over the increasing quantities of water for hydraulic fracturing in areas that experience water stress.

The runoff can also end up in groundwater systems.fractures propagate away from the wellbore. However, in low matrix permeability settings such as Enhanced Geothermal Systems (EGS) and gas shale, hydraulic fracturing creates complex networks that may contain both newly formed fractures and stimulated natural fractures.

The Environmental, Social, and Economic Impacts of Hydraulic Fracturing, Horizontal Drilling, and Acidization in California Christina Whalen Claremont McKenna College This Open Access Senior Thesis is brought to you by [email protected]

It has been accepted for inclusion in this collection by an authorized administrator. human health. Therefore, an effective hydraulic fracturing design from pretreatment formation evaluation to environmental friendly and efficient management of fracturing fluid and waste water will be presented at the end of the study.

Keywords: unconventional hydrocarbons, hydraulic fracturing, formation evaluation, water management.

Environmental impact of hydraulic fracturing

Hydraulic Fracturing Description According to polkadottrail.com hydraulic fracturing is “the process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil” (polkadottrail.com, ).

hydraulic fracturing technology. The thesis will also focus on finding the risk exposure and opportunities of integrated Oil and Gas companies in shale gas involved production in the US, as well as exploring which arethe companies best posit ioned.

Hydraulic fracturing, know as fracking or hydrofracking, produces fractures in a rock formation by pumping fluids (water, proppant, and chemical additives) at high pressure down a wellbore. These fractures stimulate the flow of natural gas or oil.

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Hydraulic fracture thesis
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