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الكتاب اللتي أبحث عنه

تمارين ومسائل في well control


وشكرا لكم
وإذا كان موقع هذا الموضوع خاطئ فأرجوا الحذف أو النقل

you very welcome
i can help you very well
all what you have to do is just sending me a meassage to my e-mail and i will send you a PDF file.
Sameer.
drilling supervisor.

you very welcome
i can help you very well
all what you have to do is just sending me a meassage to my e-mail and i will send you a PDF file.
Sameer.
drilling supervisor.


المهندس سامر

تقبل تحياتي الحارة ، واتمنى ان يكون حذف الاميل من المشاركة لم يزعجك ، كما واشكرك على مشاعرك ورغبتك بالمساعدة ، لكن اعلم اخي الكريم ان هذا المنتدى قائم على مشاركاتكم ، فعلى سبيل المثال عندما دخل المهندس makentor المنتدى وبحث عن مواضيع تخص الحفر او كتب الكترونية فثق تماماً ان هناك المئات الذين يدخلون ويبحثون عن نفس المعلومة ، والهدف الأسمى لهذا المنتدى هو ايصال المعلومة للجميع ، فأرجو منك اذا كان لديك معلومات بشأن الموضوع الذي طرحه makentor ان تضعه في المنتدى وسأساعدك في رفعه اذا تطلب الأمر لكي يتفيد منه الجميع ، مرة اخرى تقبل فائق تحياتي

اخوك مهند الكاطع

TIME ALLOWED FOR ALL QUESTIONS IS 3 1/2 HRS


Question 1





1) Calculate the missing no`s in the blank spaces below ?
2) Draw Pressure depth diagrams for all the 4 questions below on graph paper. Show your calculations clearly.

Qn
P 1
( Psi )
P 2
( Psi )
Rho 1
( psi/ft )
Rho 2
( psi/ft )
Depth 1
( ft )
Total Depth
( ft )
1


0.8
0.5
2000
5000
2
1000

0.5
0.9

2000
3

600

0.5
1000
6000
4
200

0.5
0.2
2000





Question 2

Drilling a 8 1/2" hole at 12,000 ft with 1000 ft of 6 1/4" x 2 13/16 " drill collars and 5" 19.5 lb/ft grade E drillpipe the well kicks and is closed in.

The following data is available :
a. Mud gradient = 0.600 psi/ft
b. Formation strength gradient = 0.800 psi/ft
c. Influx gradient = 0.100 psi/ft
d. 9 5/8",47 lb/ft - L80 Casing is set at 9,000 ft
e. Pdp = 500 psi : Pann = 900 psi
f. Pump 12" x 6" Triplex with 97 % volumetric efficiency.
g. Active Tank volume = 300 bbls.
h. Barite mixing capacity = 450 lbs /min.

QUESTIONS.

1. What is the MAASP prior to the kick.
2. What is the new mud weight required to kill the well.
3. What is Pc1 when Pst = 1000 psi at the start of the well kill operation.
4. What is the correct value for Pch at the start of the well kill operation and
how do we achieve this.
5. What is Pc2 at the end of phase 1.
6. What is Pc2 at the end of phase 2 , 3 and 4.
7. What is the BHP prior to and after the kick.
8. How many strokes does phase 1 take.
How many strokes bit to shoe. Why do we want to know this value.
9. How many strokes does the entire well kill operation take.
10. Calculate the influx volume.
During the well kill operation using the wait and weight method in phase 1 the
rig pump was stopped and the well shut in with no trapped pressures.
a ) What would the static Pdp reading be if this occured when the kill mud was at
the cross over from the 5" drill pipe and the drill collars.
11. Calculate the maximum kill circulation rate based on a mixing capacity of 450
lb/min.
12. How much barite is required.
13. How much increase in volume would this addition of barite give.
14. a). Make a complete standpipe graph.
b). Make a complete, phase 1, static Pdp kill graph on graph paper showing all
relevant data. ONLY THE STATIC Pdp LINE .
15. Calculate the MAASP after killing the well.
16. Calculate the shoe pressure ( Pshoe ) at the start of the well kill operation and at
the end of phase 3.




Question 3


When drilling a 8 1/2 " hole at 12300 ft with 5" 19.5 lb/ft nominal drillpipe and 658 ft 6.5" x 2.25" drill collars the well kicks and is closed in after the first build up Pdp = 850 psi and Pann = 900 psi. The mud weight in use is 0.592 psi/ft, the last casing is 9 5/8", 40 lb/ft set and cemented at 8167 ft. Formation strength gradient is 0.79 psi/ft. This well has to be killed with a duplex 18" x 6.5" pump 3" rod and a 90 % volumetric efficiency.



1. What is MAASP.
2. What is the additional mud weight required.
What is the new mud weight required to kill the well.
3. What is Pc1 when Pst = 1500 psi at the start of the well kill operation.
Pump speed is = 25 spm..
4. What is the correct value for Pch at the start of the well kill operation and how
do we achieve this.
5. What is Pc2 at the end of phase 1.
6. What is Pc2 at the end of phase 2 , 3 and 4.
7. What is the BHP prior to and after the kick.
8. How long or how many strokes does phase 1 take.
What is the annulus time.
What is the bit to shoe travel time and why do we want to know this.
9. How long or how many strokes does the entire well kill operation take.
10. What is the gradient and type of this influx.( 20 bbls ).
11. How much barite is required if the circulating tanks contain 250 bbls of mud
initially.
12. How much increase in volume would this addition of barite give.
13. Make a complete standpipe graph.
14. Calculate the MAASP after killing the well.
15. Calculate the shoe pressure ( Pshoe ) at the start of the well kill operation and at
the end of phase 3.



Question 4

A vertical well has the following configuration :

Casing : 9 5/8",36 lbs./ft., K-55
Shoe depth : 8,000 ft. BDF
Liner : 7",29 lbs/ft., C-75
Top Liner : 7,800 ft. BDF
Liner Shoe : 12,000 ft. BDF
Mud Density : 0.85 psi/ft
Shoe Strength : 1.0 psi/ft
Drill Colars : 4 3/4" x 1 3/4" x 600 ft
Drill Pipe : 3 1/2" , 15.5 lbs/ft x 6900 ft. grade G, NC 38
5" , 19.5 lbs/ft. grade G, NC 50
HWDP : No HWDP used in the string.
Pump : triplex single acting @ 97% vol.eff.,3.59 gal/stroke.
Bit Size : 5 7/8"

At a depth of 15,000 ft, BDF, a 12 bbl kick is taken and the well is closed in.
Stabilised pressures are as follows : Pdp = 1,000 psi and Pann = 1,283 psi.

Capacities :
3 1/2" dp = .0066 bbl/ft
5" dp = .01776 bbl/ft
4 3/4" dc = .0030 bbl/ft
9 5/8 x 5" annulus = .0518 bbl/ft
9 5/8 x 3 1/2" annulus = .0649 bbl/ft
7" x 3 1/2" annulus = .0248 bbl/ft
5 7/8" x 3 1/2" annulus = .0211 bbl/ft
5 7/8" x 4 3/4" annulus = .0117 bbl/ft

Calculate and answer the following:

1. The MAASP prior to the kick.
2. The mud gradient required to kill the well.
3. What is Pc2 when Pst = 2,050 psi at the beginning of phase 1 ?
4. a) How many strokes are required during phase 1 ?
b) How many strokes bit to shoe ?
c) Why do we want to know this value ?
d) How many strokes does the entire well kill operation take ?
5. What is the influx gradient. What is the influx ?



6. During the well kill operation using the wait and weight method in phase 1 the rig pump was stopped and the well shut in with no trapped pressures.

a ) What would the static Pdp reading be if this occured when the kill mud was at the cross over from the 5" drill pipe to the 3 1/2" drill pipe ?

b) What would the static Pdp reading be if this occured when the kill mud was at the top of the 4 3/4" drill collars.


7. Make a complete, phase 1, static Pdp kill graph on graph paper showing all relevant data. Absolutely do not do the Pst line, only the static Pdp !

TIME ALLOWED FOR THIS QUESTION IS 60 MIN.


Drilling 8 ½” hole at 5400m using 175m 6 ¼” Slick DC with 2 ¼” ID and 210m of 5” HWDP. We have 3000m 5” Grade “E” premium pipe and the rest to surface is 5” Grade “S” premium. The mud weight in use is 15.4 Kpa/m. The 9 5/8”, 47 lbs/ft casing shoe is set at 4850 m. The leak-off test was done with 14.8 Kpa/m mud and the surface pressure reached 17500 Kpa. The well Kicks and the driller shut-in the well. The Assistant Driller reads drill pipe pressure Pdp as 3400 Kpa and the Annulus pressure Pan as 4100 Kpa. Pc1 at 55 SPM is 6300 Kpa.

Questions. (Note: Show calculations and formula’s…)
a) What is the EMG for the shoe at 4850m? 1
b) What is the MAASP before the kick? 1
c) What is the MAASP after the kick? 1
d) What was the BHP before the Kick? 1
e) What is the BHP after the kick? 1
f) What is the mud weight to balance the formation? 1
g) What is the new mud weight to con’t drilling? 2
h) What is the height of the influx if we gained 2m3? 2
i) What is the gradient of the influx? Composition? 1/1
j) What is the volume of the open hole? 2
k) What is the string volume? 2
l) What is the annulus casing volume? 2

We prepare to kill the well with ready to drill mud!

m) If the surface active tank volume is 35 m3, how much barite do you 3
need to weigh-up the complete system?
n) What is the total “volume” increase after the well is killed? 3
o) Draw on a graph paper the Dynamic and Static pressures for Drill Pipe 4
for all phases, using the Weight & Wait method.
p) Make a Step down table for the AD on the choke. 4
q) Draw the Shoe line and the MAASP on this annulus graph. 3/3
r) Calculate the Annulus pressures at “End Phase 2, 3 and 4 4
Draw on the same graph paper the Annulus pressures for all phases.
Total 42

المهندس سامر

بارك الله بك وكثر من امثالك على هذا التجاوب الرائع من قبلك مع المنتدى ، وأسأل الله ان ينفع بك

اذا اردت بعض من المعلومات الهامة عن well control فاليك هذ الكتاب الهام عن well control وتطبيقاته
http://rapidshare.com/files/30514449/Well_Control_manual.pdf