porg-200 perl-200 1000 md sample testing table p1 p2 p1/p2 grain vol 99.9 10.8 9.25 9.43 diameter...
TRANSCRIPT
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This experiment and research reviews important techniques and
procedures for testing core permeability and porosity. In a
reservoir, rock formation permeability and porosity are two of
the most important parameters that indicate how efficient the
reservoir fluid flows through the rock pores into the wellbore.
The experimentation of permeability and porosity helps to gain a
better understanding of what occurs under specific reservoir
conditions. Core permeability and porosity are useful for:
• Production rate
• Optimal drainage point
• Determining depth and spacing of perforation
.
Flow q
Area
Core
Length Δx
Permeability, as defined by Darcy's Law, is the
measurement of fluid flow through a porous
medium. Core analysis can be performed using a
Liquid Permeameter, Core Laboratories PERL-200,
a device that is able to yield accurate permeability
for a limited range of sample size and permeability.
𝑄 =𝑘𝐴(𝑃1 − 𝑃2)
𝜇𝐿 (𝐷𝑎𝑟𝑐𝑦′𝑠 𝐿𝑎𝑤)
Where: 𝑘 = 𝑃𝑒𝑟𝑚𝑒𝑎𝑏𝑖𝑙𝑖𝑡𝑦. 𝐷𝑎𝑟𝑐𝑖𝑒𝑠
𝜇 = 𝑉𝑖𝑠𝑐𝑜𝑠𝑖𝑡𝑦. 𝑐𝑒𝑛𝑡𝑖𝑝𝑜𝑖𝑠𝑒 𝑄 = 𝐹𝑙𝑜𝑤 𝑅𝑎𝑡𝑒. (𝑐𝑐/ sec) 𝐿 = 𝐿𝑒𝑛𝑔𝑡ℎ 𝑜𝑓 𝐹𝑙𝑜𝑤. 𝑐𝑚 𝐴 = 𝐶𝑟𝑜𝑠𝑠 − 𝑆𝑒𝑐𝑡𝑖𝑜𝑛𝑎𝑙 𝐴𝑟𝑒𝑎 𝑜𝑓 𝐹𝑙𝑜𝑤. 𝑐𝑚2 𝑃1 = 𝑈𝑝𝑠𝑡𝑟𝑒𝑎𝑚 𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒, 𝑎𝑡𝑚𝑜𝑠𝑝ℎ𝑒𝑟𝑒𝑠 𝑃2 = 𝐷𝑜𝑤𝑛𝑠𝑡𝑟𝑒𝑎𝑚 𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒, 𝑎𝑡𝑚𝑜𝑠𝑝ℎ𝑒𝑟𝑒𝑠
Porosity is defined as the ratio of the pore volume to
the bulk volume of the rock sample. Core analysis
can be performed using a Gas Porosimeter, Core
Laboratories PORG-200, a device that is able to
yield accurate porosity for a limited range of sample
size and porosity. .
𝜙 =𝑃𝑜𝑟𝑒 𝑉𝑜𝑙𝑢𝑚𝑒
𝐵𝑢𝑙𝑘 𝑉𝑜𝑙𝑢𝑚𝑒=
𝐵𝑢𝑙𝑘 𝑉𝑜𝑙𝑢𝑚𝑒 − 𝐺𝑟𝑎𝑖𝑛 𝑉𝑜𝑙𝑢𝑚𝑒
𝐵𝑢𝑙𝑘 𝑉𝑜𝑙𝑢𝑚𝑒
100 md Sample Testing Table
P1 P2 P1/P2 Grain Vol
100.1 10.9 9.18 9.728
diameter (in.)= 0.983
radius (in.)= 0.4915 in.
height (in.)= 1 in.
bulk Volume= 12.43 cm3
Porosity= 0.217
200 md Sample Testing Table
P1 P2 P1/P2 Grain Vol
100.3 10.9 9.20 9.65
diameter (in.)= 0.82
radius (in.)= 0.41 in.
height (in.)= 0.9 in.
bulk Volume= 7.78 cm3
Porosity= 0.239
1000 md Sample Testing Table
P1 P2 P1/P2 Grain Vol
99.9 10.8 9.25 9.43
diameter (in.)= 0.998
radius (in.)= 0.499 in.
height (in.)= 0.975 in.
bulk Volume= 12.49 cm3
Porosity= 0.245
100 md 200 md 1000 md
100 md Sample
Core 1 Core 2 Core 3 Core 4
∆P (psig) 0.578 0.424 0.594 0.776
Time (s) 17.902 30.728 21.864 16.232
Permeability (md) 129.08 105.38 103.46 103.72
Average Permeability (md) 110.41
PORG-200 PERL-200