The permeability of 160-acre formation drained by a single well is 15mD. The well is heavily acidized to a permeability of 250 mD and a radius of 30 ft, and then completed. During well completion a 2 ft thick damaged zone developed in the vicinity of the wellbore. The permeability of this damaged segment is 4 mD. The wellbore radius is 0.5ft. Calculate the average permeability of this drainage area

The permeability of 160-acre formation drained by a single well is 15mD. The well is heavily acidized to a permeability of 250 mD and a radius of 30 ft, and then completed. During well completion a 2 ft thick damaged zone developed in the vicinity of the wellbore. The permeability of this damaged segment is 4 mD. The wellbore radius is 0.5ft. Calculate the average permeability of this drainage area

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter16: Soil Improvement And Ground Modification

Section: Chapter Questions

Problem 16.10P

See similar textbooks

Similar questions

for the following conditions, determine the groundwater infiltration. new two lane highway, lane width 12ft; shoulder width 10ft; length of crack 20ft; rate of infiltration 0.5ft^3/day/ft^2; spacing of crack 25ft kp=15*10^-5 ft/day
5. The permeability of 160-acre formation drained by a single well is 15 mD. The well is heavily acidized to a permeability of 250 mD and a radius of 30 ft, and then completed. During well completion a 2 ft thick damaged zone developed in the vicinity of the wellbore. The permeability of this damaged segment is 4 mD. The wellbore radius is 0.5 ft. Calculate the average permeability of this drainage area.
A new retail store is being planned for a site that contains 20 feet of soft clay underlain by impermeable bedrock. The coefficient of consolidation for the clay is 0.25 ft /day. The groundwater table is at the ground surface. Ten feet of sandy fill with a total unit weight of 120 pcf is placed at the site as a working platform for construction. Determine the excess pore pressure at a depth of 5 feet above the bedrock three years after the fill is placed. 3.
What does the values of the strength envelope from the consolidated–drained (C–D) test series indicate?
Describe Stress Path for Tests in Consolidated–Drained Conditions
A municipal water treatment plant employs two circular primary clarifiers arranged in parallel, following the bar screen and grit removal chamber. The plant receives 5.0 MGD. Each clarifier is center-fed (water enters at the center and exits at the perimeter). The clarifier radius is 43.0 ft and depth is 10.0 ft. a) What is the hydraulic detention time in each clarifier? b) What is the hydraulic loading rate (critical velocity) in units of ft3/(ft2-hr)?
a. Compute the value of x b. Compute the area in the fill c. Compute thr area in cut
Answer the following questions: a- What is pre-consolidation pressure? Plot the consolidation curve and show it. b- In which region of the optimum water content of a dam clay core is desired to be, explain why.
Define the term critical void ratio.
Your company has won a contract to provide and compact the fill material for an earth levee, with the dimensions shown below. The levee fill is a silty clay soil to be compacted to at least 95% of maximum Standard Proctor of ya = 106 pcf at an OMC of 18%. Your borrow pit has a silty clay with an in-situ moist density of 112.1 pcf at 18%, and a G, = 2.68. When the soil is excavated and loaded on to your trucks, the voids ratio of the material is e = 1.47. Your trucks can haul 15 cubic yards of material per trip. (26) Determine the volume of fill required for the levee; (27) Determine the volume required from the borrow pit; (28) Determine the required number of truckloads. 40* 20 -20 20 450 60' 3:1
Problem The saturated soil specimen shown below has a permeability of 0.005 cm/sec, a porosity of 38%, and a cross-sectional area of 22 cm². Two standpipes are placed at points A and B as shown below. The specimen has reached a steady state condition after flushing it with water for 1 hr. Datum ttttt h₁ = 100 cm 50 cm L = 50 cm B 40 cm h₂ = 80 cm Determine: 1. 2. Elevation head (in cm) at points A and B. Pore water pressure (in kPa) at points A and B. 3. Discharge velocity (in cm/sec) through the sample. 4. 5. What is the quantity of flow through the sample in cm³/day? What is the magnitude of the seepage velocity (in cm/sec)? OUT
2.32 A mud retort analysis of a 16-lbm/gal fresh- water mud indicates a solids content of 32.5% and an oil content of zero. Methylene blue titrations of samples of mud, bentonite clay, and drilled solids indicates a CECm of 6 meq/ 100 mL, a CEC, of 75 meq/100 g, and a CECds of 15 meq/100 g. Determine (1) the total volume fraction of low-gravity solids, (2) the volume fraction of bentonite, and (3) the volume fraction of drilled solids. Answer: 0.0745; 0.0198; and 0.0547.