Question 1:A 1,000-foot-long horizontal well is drilled in a reservoir with the following characteristics:k, = k = 75 mdh = 160 ft$ = 3.8%Bo = 1.34 bbl/STBHo = 0.62 cprw= 0.365 ftI acre= 43,560 ft2Assume a typical vertical well drains 40 acres in this reservoir.Calculate the steady-state Horizontal well productivity using Joshi's Equation, and compareit with the Vertical well productivity.

Joshi equation states that the fluid flows through a multi media and it is divided into two…

Answered: A 1,000-foot-long horizontal well is…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The following data relate to a pump-out test: Diameter of well = 24 cm; Thickness of confined aquifer = 27 m; Radius of circle of influence = 333 m; Draw down during the test = 4.5 m; Discharge = 0.9 m^3/s.What is the permeability of the aquifer in mm/s? Choices: a. 2.15 x 10^-2 b. 4.5 x 10^-1 c. 93 X 10^-1 d. 1.6 X 10^-1
find diameter of the well to yield 4000 Iph, if c=0.09/h and depression head = 0.8m.
The following data for an exploration well of 13,000 ft depth: Hole diameter = 8.1/2 inch Hole depth = 13,000 ft Plastic viscosity = 35 cP Yield point = 25 lb / 100 ft² Mud weight = 13 lb / gal Flow rate = 400 gpm Drill pipe ID = 4.276 in / OD = 5 in Drill collars ID = 2.875 in / OD = 6.5 in / Length = 500 ft Previous casing = 95/8 in / ID = 8.755 in set at 10,000 ft Pump pressure = 3000 psi Surface equipment type = 4 1. According to the above information calculate the following by using the Bingham plastic model and power-law model. • The nozzle sizes • The bottom hole pressure while circulating 2. Compare and discuss the results. Explain which model is more accurate. 3. Compare the two models with Hughes charts. Compare the results of the models and charts with bit hydraulic optimization software given.
The following data relate to a pump-out test: Diameter of well = 24 cm; Thickness of confined aquifer = 27 m; Radius of circle of influence = 333 m; Draw down during the test = 4.5 m; Discharge = 0.9 m^3/s.What is the permeability of the aquifer in mm/s?
A vertical well is drilled in an oil reservoir overlaid by a gas cap. The related well and reservoir data are given below: Assume that horizontal and vertical permeability, i.e., kh = kv = 50 md, 100 md and 150 md, %3D %3D oil relative permeability, kro = 0.85, oil %3D density, po = 47.5 lb/ft3, gas density, pg = 5.1 Ib/ft3, oil viscosity, po = 0.7 cp, oil formation volume factor, Bo = 1.11 bbl/STB, oil column thickness, h = 100 ft perforated interval, hp = 25 ft depth from GOC to top %3D of perforations, Dt = 25 ft, wellbore radius, rw = 0.25 ft drainage radius, re = 1000 ft. %3D %3D Using the Meyer and Garder relationships, 1- calculate the critical oil flow rate at different vertical permeabilities. 2- Draw and discuss the relationship of the critical oil flow rate with respect to the vertical permeability. (.
3b) A well of r = 0.328 ft , drainage area 650 acres and Pwr=4500 psia in the reservoir of following characteristics (K = 28 md, h = 59 ft, Pe= 5651 psia, u = 1.67 cp, and B, 1.12 rb/stb). This well is producing at steady state with an outer boundary constant pressure of 5651 psia. This well suffers from skin effect equals to + 10 and penetration of damage is 3ft beyond the wall of the well. Answer Following Questions: A) Calculate production rate of the well for s =+10 and s = zero. B) Describe two mechanisms to increase damaged well production by 30% C) Permeability of damage zone.
b) A 30-cm well fully penetrates an unconfined aquifer of saturated depth 25 m. When a discharge of 2100 Ipm was being pumped for a long time, observation wells at radial distances of 30 m and 90 m indicated drawdown of 5 and 4 m respectively. i. Estimate the coefficient of permeability and transmissibility of the aquifer. ii. What is the drawdown at the pumping well? *Ipm = liters per minute *h = H-s, where H = saturated depth
9) A well is located in a confined aquifer near the intersection of a constant head and impervious boundary. a) Estimate the steady state drawdown in the well for Q=2 ft³ s, rw = 1 ft, distance from the well to stream= 300ft and distance from well to impervious boundary= 150 ft. T = 0.14ft²/s b) Estimate the steady state drawdown at point P located midway between the well and the steam. The angle between the stream and the impervious boundary is 90°
A well is pumping at an unknown, steady rate in a confined aquifer. Near the pumping well are two observation wells; observation well A is located 8m from the pumping well and B is located 24m from the pump- ing well. The heads in these wells are hA = 134.20 and hB = 134.28 m. You know from prior pumping tests of the well that the well and the observation wells are screened in a confined aquifer with transmissivity T = 1200 m2/day. Assuming that without the well pumping there would be no hydraulic gradient at all, what is the pumping rate of the well?
A well is pumped for 20 minutes at a rate of Q=2599 cubic meters per day. After the pumping stopped the well is allowed to recover and measurements of the residual drawdown are made as shown below. Determine the Transmissivity of the aquifer in square meters per day. Time since Residual Pumping Stopped(min) Drawdown (m) 0.2 0.9 0.3 0.78 0.5 0.7 1 0.55 2 0.45 3 0.38 0.28 10 0.2 20 0.05
8- 3 wells are sunk in a confined aquifer in a straight line at 25 m intervals. If one end well is pumped at rate of 300 m³/day, the steady state drawdown in the other wells was found to be 3 m and 2 m. Find the aquifer transmissivity. If all the wells are pumped at the same rate of 300 m³/day, what is the minimum drawdown between the wells?
Hydrology problem. 6. Three pumping wells are located around an observation well as shown in the figure below. All three wells have diameters of 0.5 m and are drilled into the same confined aquifer system with transmissivity of 20 m2/day. Water is pumped at a rate of 140 m*/day from well P1, 105 m /day from well P2, and 90 m /day from well P3. Steady- state drawdown in each well is 5.4 m for P1, 4.3 m for P2, and 3.7 m for P3. Find the steady-state drawdown in the observation well. • P1 70 m 55 m P3 • P2 60 m

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