1: What is Permeability

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● Permeability
● Topic overview
● 1: What is Permeability
● Absolute and Effective Permeability
● Relative Permeability
● 2: The Darcy Law
● The Darcy Law
● Horizontal Flow
● Generalised Form
● 3: Measurements
● Problem
● Solution
● Developers
● References
● Summary

نوع زبان: انگلیسی حجم: 2.03 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 16 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/05/17 05:18:46

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عبارات مهم استفاده شده در این مطلب

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permeability, ., darcy, law, fluid, –, measurement, summary, back, home, developer, reference,

توجه: این مطلب در تاریخ 2019/05/17 05:18:46 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

http://www.ux.uis.no/~s-skj/ResTek1-v03/e-moduler/Permeabilitet/Permeability.ppt

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: permeability, ., darcy, law, fluid, –, measurement, summary, back, home, developer, reference,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

press the button to start permeability permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back topic overview next what is permeability the darcy law measurements ۷۷ .bin permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back ۱ what is permeability definition the permeability of a rock is a measure of how easily a fluids may flow through the pore channels in a rock. it depends on the size shape tortuosity and number of the pore channels in the porous medium. absolute permeability is the permeability of the porous medium if a single fluid is flowing. effective permeability is the permeability of a fluid if another fluid is present. relative permeability is the effective permeability divided by the absolute permeability. next for more information about permeability follow these links http biosystems.okstate.edu darcy http www.spe.org learning demo sm mod۱ what is the difference between permeability and porosity ۵۹۴.bin permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back illustration of pore and pore channels in a rock. these two figures have the same porosity same pore space . in the figure to the right the pore channels are closed and the permeability is zero. impermeable rock cap rock traps hydrocarbons in the reservoir. cap rock may be porous but the pore channels must be closed to stop fluids from escaping. permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back absolute and effective permeability absolute permeability absolute permeability is constant for a particular medium and independent of the fluid type. a single fluid or phase is present in the medium. in principle the absolute permeability only depends on the geometry of the pore channel system. effective permeability more than one fluid is present. each fluid will mutually reduce the pore channels open to flow for the other fluid and the effective permeability may be much lower than absolute permeability. permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back relative permeability relative permeability is the ratio of effective permeability of a particular fluid to its absolute permeability. if a single fluid is present in a rock its relative permeability is ۱ . is a dimensionless ratio devised to adapt darcy’s law to multiphase flow conditions. the relative permeability of a fluid is a function of its saturation. the figure shows the relative permeability to oil and gas as functions of gas saturation for a process where the wetting phase oil is decreased i.e. a drainage process. gas starts to flow when sg sgc the critical gas saturation. oil flow stops at sg sgmax ۱ sorg. here sorg is the residual oil saturation caused by gas displacement. permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back ۲ the darcy law the discoverer of darcy’s law ۱۸۵۶. his law is a foundation stone for several fields of study including ground water hydrology soil physics and petroleum engineering. henry darcy or d’arcy ۱۸ ۳ ۱۸۵۸ hydraulic engineer. next biosystems.okstat.edu darcy summary.htm a little joke if you follow this link you can read a summary of darcy’s experiments. permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back the darcy law henry darcy ۱۸۵۶ pore channels in a rock are irregular pipes . idealised model q – fluid flow rate cm۳ s k – permeability d h – difference in manometer levels a – cross sectional area cm۲ l – length of the filter cm here are the expression for horizontal flow or the generalised form of darcy law. unit conversions go to units via index permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back horizontal flow u – darcy velocity cm s q – fluid flow rate cm۳ s a – cross sectional area cm۲ k – permeability d µ viscosity cp dp – pressure differential atm dx – length of core cm permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back generalised form the purpose of the gravitational term is to cancel out the pressure gradient for a column of fluid in equilibrium. then the fluid velocity will be zero as it should be in equilibrium. u – darcy velocity cm s q – fluid flow rate cm۳ s a – cross sectional area cm۲ k – permeability d µ viscosity cp  density cp g – gravity cm s۲ dp dl – pressure gradient atm cm dz – elevation cm permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back ۳ measurements the absolute permeability of a rock sample can be determined in the laboratory by using an inert gas that fills the sample’s pores completely and shows little or no chemical interaction with the rock’s mineral grains. next link to examines in reservoir techniques http www.ux.his.no ~s skj restek۱ v ۱ eksopg click on this banner if you want to study a laboratory exercise. permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back problem in the figure the height of the water level h t in the cylinder starts at h at time t and is recorded as a function of time as the water discharges through the artificial core sample. show that the relationship between h and t is given by where l is the length of the core. the expression is in darcy units with the density  in g cm۳ and ۱ atmosphere is ۱ ۱۳۲۵ pascal. how can this expression be used to measure the permeability k solution permeability home developers references summary ۱ what is permeability ۲ the darcy law ۳ measurements back solution we have the following two expressions for the rate q for the rate through the core with water level difference h t hb between inlet and outlet end and for the discharge of the water in the cylinder. these two expressions for q are set equal. the result is a first order differential equation for h as a function of t . one has to use that  dh h ln h. applying the initial condition that h h when t we find the expression given. in si units gh is in kg m۳ · m s۲ · m which is kg m s۲ which again is n m۲ or pa. if we use gh in g cm s۲ we get a …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: permeability, ., darcy, law, fluid, –, measurement, summary, back, home, developer, reference,

این فایل پاورپوینت شامل 16 اسلاید و به زبان انگلیسی و حجم آن 2.03 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/05/17 05:18:46 استخراج شده است.

http://www.ux.uis.no/~s-skj/ResTek1-v03/e-moduler/Permeabilitet/Permeability.ppt

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