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What does NOT require gravity for its formation?
Capillary Fringe
What is an aquiclude?
An aquiclude is a layer of impermeable or low-permeability rock or sediment that prevents the movement of water. It acts as a barrier that restricts the flow of water and contributes to the formation of aquifers.
What is permeability in electromagnetism?
Permeability is the measure of the ability of a material to support the formation of a magnetic field within itself.(Degree of magnetization that a material obtains in response to an applied magnetic field.) It is represented by the Greek letter μ.
What effect does freezing have on membrane permeability?
Freezing can disrupt the structure of cell membranes, causing increased membrane permeability. This can lead to the leakage of cellular contents and potentially cell death. Additionally, ice crystal formation during freezing can physically damage cell membranes, further compromising their permeability.
How can man increase porosity and permeability in oil wells?
There is not feasible way to change the overall porosity and permeability in an oil field. However, it is possible in many cases to improve the porosity and permeability within the near wellbore region, where the change in pressure is the greatest. Injecting acid into a well, may slightlyincrease the porosity but sigmificantly improve the permeability, as it creates larger flow paths (also called worm holes) through the formation. Hydraulic fracturing will also stimulate a well, although the formation's permeability and porosity is unchanges. It makes it easier for oil to flow into the well, so its effect in the long run, is the same as if the near well bore region had higher permeability. Low permeability formations often produced by horizontal wells, which is similar to hydraulic fracturing- it is easier for the oil to flow to the well.
What is cappillarization?
The word "cappillarization" is used to indicate the formation and development of a network of capillary blood vessels to some part of the body
What is the triple response of intradermal injection of histamine?
On intradermal injection of histamine the following three reaction occurs 1. Red spot formation - due to intense capillary dilation 2. Wheal formation -due to exudation of fluid from capillaries and vanules 3. Flare formation - due to arteriolar dilation mediated by axon reflex
A consequence of the surface tension of water is?
The surface tension of water is responsible for the cohesive properties it exhibits. For example, capillary action is a consequence of surface tension.
What is the function of astrocytes cells?
Astrocytes are star shaped glial cells because of cytoplasmic processes that extend from the cell body. They play a role in regulating the extracellular composition of brain fluid. They release chemicals that promote the formation of tight junctions between the endothelial cells of capillaries.
Logging tool for direct determination of permeability?
A permeameter is a logging tool specifically designed to directly measure permeability in subsurface formations. It operates by applying pressure to the formation and then measuring the flow of fluid through the rock to calculate the permeability. This tool is essential for understanding the flow characteristics of a reservoir and optimizing production strategies in the oil and gas industry.
1 What characteristics of a rock layer allow it to hold water?
Permeability is the ability of that water to be transmitted from one place to another. For example clays have a huge porosity, but very bad permeability. Secondary permeability is the measure of other physical structures in a rock or admixture that allows for storage of water in spaces not primary to the fabric of the formation.
What is a geological reservoir?
A geological reservoir is a subsurface rock formation that holds significant amounts of natural resources such as oil, natural gas, or water. These reservoirs have the capability to store and release these resources over time, making them crucial for energy production and water supply. The characteristics of the reservoir, such as porosity and permeability, determine how easily these resources can be extracted.
