Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 6, Problem 6.9P
To determine
Find the hydraulic conductivity of the oil flowing through the same rock specimen (k).
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A limestone core sample is saturated 100% with water. Calculate the absolute permeability
of the core sample if the water is flowing at 4.15 cubic centimetres per second. The length of
the core sample is 13.61 centimetres and its diameters if 7.13 centimetres. The pressure
differential across the core sample is 25 atmospheric pressure and the water viscosity is 1.1
centipoises.
Explain a method of how the permeability of this reservoir can be improved.
Help me answer
Question 4.5
A rock sample has a length of 20.32 cm and a diameter of 5 cm. The pressure
profile inside the core sample is given below, where nitrogen of viscosity 0.0178
cP is flowing at a constant rate of 55 cm³/s. What is the permeability of the sample
if the flow is in accordance with Darcy's law?
450
400
350 -
300
250 -
P [psig]
200
150
100 -
50
1
3.
4
7
8
9.
Distance from inlet [in]
6
Chapter 6 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Please help me with my homework, show all work! I need to learn how to do this!arrow_forwardRefer to the constant-head arrangement shown in the figure. L Graduated flask Porous stone Soil specimen For a test, the following are given: •L=18 in. • A = Area of the specimen = 3.5 in.2 • Constant-head difference = h = 28 in. • Water collected in 3 min =21.58 in.3arrow_forward2. Sand at a given relative density has a friction angle of approximately 33° (relatively low stress). When the sample is unsaturated at a given value of saturation (not given to you), the specimen has a negative pore pressure of 5 kPa. How tall a sandcastle "vertical" wall can you construct? What would happen to your sandcastle if the level of saturation suddenly increased? (Assume a total unit weight of 18 kN/m³)arrow_forward
- For a falling head permeability test, the following values are given: Length of specimen: 200 mm Area of specimen:1000 sq. mm Area of standpipe: 40 sq. mm Head difference at t= 0: 500 mm Head difference at t= 180 sec : 300 mm Determine the hydraulic conductivity (cm/sec)arrow_forwardA sample of sand, 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a constant-head apparatus. The total head was kept constant at 30 cm and the amount of water collected in 5 seconds was 40 cm^3. The test temperature was 20 deg C. Calculate the hydraulic conductivity. Provide a diagram a.5.0 x 10^-2 b.3.47 x 10^-2 c.2.0 x 10^-1 d.6.7 x 10^-1arrow_forwardConsider the upward flow of water through a layer of sand in a tank as shown in the figure below. The void ratio of the sand is e=0.52 and the specific gravity of solids is 2.67. Calculate the total stress, pore water pressure, and effective stress at points A and B. What is the upward seepage force per unit volume of soil?arrow_forward
- Read the question carefully and give me right solution. Provide detailed solution with clear calculations. The hydraulic conductivity of a soil sample, measured at 25C, was 0.005 cm/s using water as the test fluid (density = 997.2 [kg m–3 ], viscosity = 0.0008872 [kg m–1 s –1 ]. Determine the conductivity for ethanol at 10C, density = 798 [kg m–3 ], viscosity = 0.001394 [kg m– 1 s –1 ]arrow_forwardIn a constant-head permeability test. A test gives these values: •L= 25 cm •A = 160 area of the specimen cm2 • Constant-head difference, h =1m • Water collected in a period of 5min and 40sec= 1 Liters Calculate the hydraulic conductivity in cm/sec.arrow_forwardProblem 7.17arrow_forward
- Please answer hand written needed not typearrow_forward6.5 Refer to Figure 6.4. For a constant head permeability test in a sand, the following values are given: • L = 350 mm • A= 125 cm² • h = 420 mm • • Water collected in 3 min = 580 cm³ Void ratio of sand = 0.61 Determine: a. Hydraulic conductivity, k (cm/s) b. Seepage velocity dified conarrow_forwardThe hydraulic conductivity, k of sool is 9.11x10^-6 cm/s at a temperature of 20 degrees C. Determine its absolute permeability at 20 degrees C, given that at 20 degrees C Yw =9.789 kN/m^3 and n= 1.045x10^-3 N•s/m^2arrow_forward
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