Отправлено: 25.06.12 11:41. Заголовок: Nomenclature

Nomenclature
A = sample cross-sectional area, cm2

a * = equation coefficient associated with m*

B = specific counter ion activity, 1/ohm-m/equiv liter

BD = bulk density, g/cm3 (assumed or measured)

BV = bulk volume

CEC = cation exchange capacity, meq/100 gm of sample

GD = grain density, g/cm3 (from downhole log)

GV = grain volume

F = formation resistivity factor independent of clay conductivity, Ro/Rw

F* = formation resistivity factor independent of clay conductivity, a*/

FD = fluid density, g/cm3 (assumed)

g = gravity term used to convert density to fluid gradient

h = height above free water table, ft or m

k = permeability, md

k1 = Klinkenberg permeability value, md

ka = air permeability, md

I = sample length, cm2

L = subscript used to indicate laboratory conditions

m* = cementation exponent (slope of F* vs plot)

n = saturation exponent, slope of RI (Resistivity Index) versus Sw plot

n* = saturation exponent independent of clay conductivity

PV = pore volume, fraction or percent

pc = capillary pressure, psi of kPa

p1 = upstream pressure, atmospheres absolute

p2 = downstream pressure, atmospheres absolute

pa = atmospheric pressure, atmospheres absolute

Qv = quantity of cation exchangeable clay present, meq ml of pore space

q = liquid flow rate, cc/sec

qa = gas flow rate at atmospheric pressure, cc/sec

R = subscript used to indicate initial reservoir conditions

Ro = true resistivity of 100% brine-saturated rock, ohms

Rt = true formation resistivity, ohm-meters

Rw = formation brine resistivity, ohm-meters

Sw = formation brine saturation, fraction

Vb = bulk volume of sample used to determine unoccupied pore space, corrected based on retort sample weight, cm3

Vg = grain volume, cm3

Vo = volume of oil collected, cm3 (corrected for vapor losses, coking, etc.2)

Vu = volume of unoccupied pore space, corrected based on retort sample weight, cm3

Vw = volume of water collected, cm3

W1 = weight of crushed rock in retort less weight of contained fluids

W2 = weight of crushed rock in retort, g

= contact angle, degrees

µ = viscosity of fluid flowing, centipoise

= fluid gradient, psi/ft

= rock grain density, g/cm3

= grain density of rock solids, g/cm3

= oil density, g/cm2

= water density, g/cm2 (assumed 1.00 for water collected)

= interfacial tension, dynes/cm

Ф = porosity