Hydraulic Fracturing and Water Resources
Expert-defined terms from the Advanced Certificate in Oilfield Water Management course at Greenwich School of Business and Finance. Free to read, free to share, paired with a globally recognised certification pathway.
Hydraulic Fracturing #
Hydraulic fracturing, also known as fracking, is a well stimulation technique us… #
It involves the injection of a pressurized fluid mixture into a wellbore to create fractures in the rock, allowing for the release of natural gas, oil, and other resources trapped within the formation.
Water Resources #
Water resources refer to sources of water that are available for use by human po… #
This includes surface water such as rivers, lakes, and reservoirs, as well as groundwater stored in aquifers. Water resources are essential for various purposes, including drinking water, agriculture, industry, and energy production.
Acid Mine Drainage (AMD) #
Acid mine drainage (AMD) is the outflow of acidic water from metal mines or coal… #
This occurs when sulfide minerals in the ore are exposed to air and water, leading to the formation of sulfuric acid. AMD can have detrimental effects on water quality and aquatic ecosystems due to its high acidity and heavy metal content.
Aquifer #
An aquifer is a geological formation that contains water and allows for the move… #
Aquifers are important sources of water for human consumption, agriculture, and industry. They can be found in various types of rock formations, such as sandstone, limestone, and fractured bedrock.
Bioaccumulation #
Bioaccumulation is the process by which toxic substances are accumulated in the… #
This occurs when organisms ingest or absorb contaminants from their environment faster than they can eliminate them. Bioaccumulation can lead to higher concentrations of pollutants in organisms higher up the food chain, posing health risks to humans and wildlife.
Brine #
Brine is a highly saline solution that often contains dissolved salts and minera… #
In the oil and gas industry, brine is commonly produced as a byproduct of hydraulic fracturing operations. It can pose challenges for water management due to its high salinity levels and potential environmental impacts if improperly disposed of.
Desalination #
Desalination is the process of removing salt and other impurities from seawater… #
This technology is used to provide drinking water in areas where freshwater sources are limited or contaminated. Desalination methods include reverse osmosis, distillation, and electrodialysis.
Disposal Well #
A disposal well is a deep underground well used for the injection of wastewater… #
In the oil and gas industry, disposal wells are commonly used to inject produced water from hydraulic fracturing operations back into the ground. Properly designed and managed disposal wells are essential for preventing groundwater contamination.
Fracture Gradient #
The fracture gradient is the pressure at which rock formations will fracture or… #
In hydraulic fracturing, operators must carefully monitor the fracture gradient to ensure that the injected fluid does not exceed the pressure that the rock can withstand. Exceeding the fracture gradient can lead to uncontrolled fracturing and potential environmental damage.
Groundwater #
Groundwater is water located beneath the Earth's surface in soil pores and rock… #
It is a vital source of drinking water for many communities and plays a critical role in sustaining ecosystems. Groundwater can be replenished through precipitation and infiltration, but excessive pumping or contamination can deplete or degrade this important resource.
Injection Well #
An injection well is a deep underground well used to inject fluids into the subs… #
In the oil and gas industry, injection wells are commonly used for the disposal of wastewater, enhanced oil recovery, and hydraulic fracturing operations. Proper construction and monitoring of injection wells are essential to prevent groundwater contamination.
Produced Water #
Produced water is the wastewater generated during oil and gas production #
It typically contains a mixture of water, dissolved salts, hydrocarbons, and other contaminants from the reservoir formation. Produced water must be treated and managed properly to comply with environmental regulations and prevent pollution of water resources.
Reverse Osmosis #
Reverse osmosis is a water treatment process that uses a semi #
permeable membrane to remove impurities from water. In reverse osmosis, water is forced through the membrane under pressure, separating dissolved salts, minerals, and other contaminants from the clean water stream. This technology is commonly used for desalination and drinking water purification.
Surface Water #
Surface water refers to water that is visible on the Earth's surface, including… #
It is an essential source of freshwater for human consumption, agriculture, and industry. Surface water quality can be impacted by pollution from various sources, including urban runoff, industrial discharges, and agricultural activities.
Water Conservation #
Water conservation refers to the efficient use and management of water resources… #
This includes practices such as fixing leaks, using water-saving appliances, and implementing water reuse and recycling programs. Water conservation is crucial for sustainable water management in the face of increasing water scarcity and demand.
Water Management #
Water management encompasses the planning, development, and implementation of st… #
This includes the protection of water quality, allocation of water rights, and regulation of water use in various sectors. Effective water management is essential for meeting the needs of communities, industries, and ecosystems while ensuring long-term water security.
Water Quality #
Water quality refers to the chemical, physical, and biological characteristics o… #
Good water quality is essential for human health, aquatic ecosystems, and various economic activities. Water quality can be impacted by pollution, contaminants, and natural processes, requiring monitoring and treatment to maintain safe and clean water supplies.
Water Reuse #
Water reuse, also known as water recycling, is the practice of treating wastewat… #
Treated wastewater can be used for irrigation, industrial processes, and even drinking water production. Water reuse helps conserve freshwater resources, reduce wastewater discharges, and enhance water sustainability in regions facing water scarcity.
Well Stimulation #
Well stimulation is a process used to increase the productivity of oil and gas w… #
Techniques such as hydraulic fracturing, acidizing, and steam injection are used to create or enlarge fractures in the rock formation, allowing for better fluid flow and resource recovery. Well stimulation operations must be conducted carefully to minimize environmental impacts and ensure well integrity.
Zero Liquid Discharge (ZLD) #
Zero liquid discharge (ZLD) is an advanced water treatment process that eliminat… #
In ZLD systems, wastewater is treated through multiple stages, including evaporation, crystallization, and membrane filtration, to produce clean water and solid residues. ZLD technologies are used in industries such as power generation, mining, and oil and gas to minimize water discharges and environmental impact.