operation. First, circulate the kick out of the hole using original mud, then Circulate the kill weight
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- Q1) B) using the Bingham plastic model determine the pressure losses in the annulus for the following well: (4 Marks) Data Length of drill pipe= 9000 ft Drill pipe = OD/ID = 5 in /4.276 in Hole diameter = 8.5 in |Page Plastic viscosity = 25 cp Yield point = 20 Ibf/100ft2 Flow rate = 300 gpm Mud density = 10 ppg %3D6.5 tilted gas sand encountered at 4500 ft isknown to have pore pressure of 2700 psig well is tobe drilled near the top of the structure which is expectedto penetrate the sand at 3500 ft The gas is known tohave density of 1.0 lbm/gal at reservoir conditionsCompare the mud density required to drill the secondwell safely with that of the first.3- An exploratory drill hole was made in a stiff saturated clay having a moisture content of 29% and G;= 2.68 as shown below. The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6 ft above the top of sand layer xaWAQ the clay, determine the safe depth of excavation before the bottom heaves. X. If an open excavation is to be made in Exploratory drill hole 10 ft 6 ft 4.5 ft Saturated clay Sand
- The result of the liquid limit tests where N is the no of blows and w is the water content in % are given as follows: Trial 1 N=D11 w%3D53.9; Trial 2 N=15 w=50.6; Trial 3 N=23 w=48.1; Trial 4 N= 30 w= 46; Trial 5 N= 46 w=43.3; Trial 6 N= 53 w=41. The PL= 25 and the in situ moisture content is 45%. Determine the liquid limit. O a. 47 O b. 41 O c 50 O d. 431- Equation used to estimate cost per foot of the wel... 2- Linear flow in Darcy equation happen through: B- surface area C-Well bore cross section D- semi A- Cross sectional area surface area 3- All saturation values are based on: A. Pore volume 4- If effective porosity equal total porosity the formation is 5- Diagenetic process cause additional porosity. (True, false). B. Grain volume C. Bulk volume D- none of above8. The result of the liquid limit tests where N is the no of blows and w is the water content in % are given as follows: Trial 1 N=11 w=53.9; Trial 2 N=15 w=50.6; Trial 3 N=23 w=48.1; Trial 4 N= 30 w= 46; Trial 5 N= 46 w=43.3; Trial 6 N= 53 w=41. The PL= 25 and the in situ moisture content is 45%. Determine the liquid limit. a.43 b.50 c. 47 d.41
- A - Whilst drilling (8 3/8") section, at depth (9600 ft detected and the well was shut-in. Drilling supervi mud engineer to increase mud weight from (9.8 ppg control the well. 1- Determine the required amount of Barite (in sack mud density (9.8ppg-10.2ppg). 2- The mud engineer started to weighting up th- adding the required Barite the final mud density to poor suspension properties of the mud (low-Y amount of settled Barite in (Kg)? And wha recommendations/practices to avoid such issue? 3- After killing the well, drilling was resumed an massive bed of Anhydrate was penetrated. expect mud contamination be? And recommendations? Given data: Mud in tanks = 200 m³ Barite sack= 25 kg Barite density = 4.3 gm/cc 1 m³=6.28 bbl Best wishes .Styles Editin A production casing was planned to run in the production hole of a well with casing shoe at 15,000 ft. When casing was run empty to the mid depth, collapse safety factor was calculated to be 1.9. When the casing was at the bottom and full of a certain mud, safety factor of the collapse was calculated to be 2.75. If the mud weight of the fluid in the annulus was 14.0 ppg, determine the casing collapse rating and mud weight of the fluid inside the casing.B. Under certain conditions the Thiem equation (5-43) for confined aquifers, is equivalent to the Cooper-Jacob equation (5-58) for confined aquifers. What are the conditions? (This exercise is easier than Problem A.) C. If an analysis is made of the hydraulic conductivity of a site using permeameter tests of core samples, slug tests of monitoring wells, and pumping tests of production wells, it is often observed that the hydraulic conductivity as measured by each method is different. Which method would be most likely to have the greatest hydraulic conductivity, and which the least? What are some possible reasons why this would be true?
- 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 0.0547.8. The lower sand layer in the soil profile is in artesian condition. Calculate the maximum depth z of the proposed excavation. Standpipe 3.0 m 0.0 m 9 WT Sand Pary 1.70 Mg/m Paar-2.10 Mg/m WT 2.0 m Sand 4.0 m Clay Peat 2.10 Mg/m Clay 8.0 m Sand Sand (b) (a) Fig P-63D B. 2. 43 m C. 2.58m D. 2.76m A. 2.1 mA pumping test was made in a fine sand extending to a depth of 50 ft where a bed ofclay is encountered .The normal ground water level was at the ground surface.Observation wells were established at distances of 10 ft and 20 ft from the pumping well.A steady state was reached at a rate of pumping equal to 1.2 gpm .The drawdown atthe outer well was 0.5 ft and at the inner well 1.5 ft .What was the hydraulic conductivityof the sand in ft/sec
