Nghiên cứu kích thước tối ưu và hợp lý ống nâng cho các giếng GASLIFT ở mỏ bạch hổ (TT)

B O
I HC M - A CHT




L



C TNG N
NG GASLIFT  M BCH H

N K thut d
: 62.52.06.04




LU K THUT

i - 2015
i: -
-


Ngi hng dn khoa hc:
1. PGS, -
2, 


-

-Nga Vietsovpetro



Lu   c bo v c H       p
ng t  i hc M - a ch    








 u lui th vin: Th vin Qui
hoc -
DANH M
1.   , Nguy   n Th Vinh (2007),

“Lựa chọn máy bơm ly tâm điện chìm trong khai thác dầu”,
T - a cht s 20, 10/2007, trang 36-38.
2.  (2009), Nghiên cứu dòng chảy của chất lưu trong
ống khai thác của các giếng gaslift.     
N2009-5.
3.    (2010), Dòng chảy của chất lưu trong ống khai
thác dầu, T - a cht s 30, 4/2010, trang
1-3.
4.  (2010), Nghiên cứu các dạng tổn thất của chất lưu
trong ống khai thác của các giếng gaslift.  
s N2010-03.
5.  (2011), Các dạng tổn thất của chất lưu trong ống
khai thác dầu, T - a cht s 34, 4/2011,
trang 57-59.
6.   , Nguyn Thanh Tun, H Quc Hoa (2012),
Research solutions of the possibility of tranportation
pipeline in South Dragon field, International conference
petroleum technology, 9/2012, page 65 - 66.
7.  (2012), Ảnh hưởng của điều kiện làm việc thay đổi
trong giếng đến cột ống khai thác, T - a
cht s 40, 10/2010, trang 88-92.
8.  (2012), Ảnh hưởng của điều kiện làm việc thay đổi
của giếng đến cột ống khai thác (The effects of changing
well conditions to tubing string), Hi ngh khoa hc ln th
i hc M - a cht, 11/2012, trang 42.

1

M U
p thit c 
M Bch H  gi   ng gaslift chi 
80%  gin nay. T l ging gaslift s p tc
 theo thi gian. , ng va 

gi m bc si phi thay
Tng khi
.
Theo hng m   
s xy ra t . y, vim
bo hiu qu s d      tr  
cp thii phu nhm t
thit b n    p cho
tng loi gim bc su.
2. Mu
c trng ho xui
trong viu trng hc c
bng          a chn
c   thit b  ng chun cho tng khu v  i
a m xut nhng gi  
ngh c th cho tng loi ging gaslift nhm t
m sn php vi thc tr
ng va hin tip theo.
u
- Thu thp, thi
u c 
- ng dc Catastrof v liu t
thc t  a h thng - v
- ng dng phn m ng
 c n.
u
2

- C bng gaslift  m Bch H.
5. Phu

- Ca m Bch H
- Ct b ng,
m mi ca lu
- X    c t a ct   
ng  khu v
 cho vic la chc ct   
ngh 
- Kh        ng tr 
ng hc ca h thng - v
ti  t b trong

7. Lum bo v
- Trng hc ca h thng - V
gin vt
ng hc, do vng gaslift hot ng trong trng
ng bc.
-  ng mc ca ch s 
c tha ging.
-  
s  nhng gaslift theo tng khu
vc trong m Bch H.
c
Vic s d c c
chng minh bn chng hng hc ca
       
cu mng c th. X  khoa hc cho vi
t  
 nhng gaslift  m Bch H.
c tin
3

Kt qu u ca lu cho vic la chn
  xu        thu   ng
i m Bch H.
10. Kha lu
Phn m t lun, kin ngh.

TNG QUAN V U B
U

1.2 Ch   u bng gaslift
     u v   u bng
gaslift
    u   u t  
 gii quyt nhng v c th, chi tit ca b thit b 
ging vi ch   p vi tr, hin trng ca
khu vu. Tt c u tp trung ch y
ng thnh ch  gaslift chu k p.
Trong lu bu
p cng mng th  
 c ca h th ng-V     xu  i
 th i vi v
 nht nhm gii quy
1.4 Tng quan v thc trng
i m Bch H
4


ng s
80

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120
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500
1000
1500
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2500
3000
Thg10-06 Thg2-08 Thg7-09 Thg11-10 Thg4-12 Thg8-13 Thg12-14
ΣVkhí
Số giếng hoạt động
 lic t  
Kt lun
Vi thc trng hin nay ca m Bch Hng va
gim dn v ngc trong sn ph
ng ging thp chim t tr
 n di gian, s ng ging chuyn
u dn kh ng
 s thiu ht trong 5 - a. i phi
 xu - k thut
nhm tn sn phm.

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Thg10-06 Thg2-08 Thg7-09 Thg11-10 Thg4-12 Thg8-13 Thg12-14
ΣQd
ΣQl
Số giếng gaslift
5


NG
CA H THNG - VNG GASLIFT
M BNG HC
Hoc tin hai h
th ng ch         
  t thit v   a cha sn phm   ng
      qua li trc ti   thuc ln
nhau, t thng - vm bc trt
ng ca h thng - v c
t.

ng ca gi
m bng hc bt tai bin (Catastrophe
theory).
2.1.1 Lý thuyết Catastrophe (Catastrophe theory).
ra mu
cho tt c c chuyn ting nht.
M          

(2.1)
    u ( 

(2.2)

2.1.2 Áp dụng lý thuyết Catastrophe vào việc đánh giá trạng
thái hoạt động của các giếng gaslift.
H

f(SL)=a(SL)
3
+b(SL)
2
+c(SL)+d

f(x) = ax
2
+bx+c (2.4)
1 2 n
dx
= df(x,c ,c c )
dt

2
2
u
u
df d f
0; 0
dx dx







6



i
= Q
i


-  M
1
(Q
(1)
, Q
(2)
, Q

(5)
)

-  M
2
(Q
(2)
, Q
(3)
, Q
(6)
)



-  M
j
(Q
(j)
, Q
(j+1)
, Q
(j+4)
)

 
.

K 
 


  
-

Q >


- 
- 


 
 

-         



7





3.1.1 Dòng chảy của chất lưu vào giếng.
          
.
3.1.2 Chỉ số khai thác (PI):

(3.9)


 










 


M
y = -166,6ln(x) + 2556,6
2000
2200
2400
2600
2800
3000
3200
0 5 10 15
c y nh, (m)
PI
y = -338,2ln(x) + 2787,2
1000
1500

2000
2500
3000
0 5 10 15 20 25 30 35 40
c y nh (m)
PI
Q
L
PI
PP
v
đ


8











. C
    -

 

            

v
H
y = -194,5ln(x) + 2285,2
0
1000
2000
3000
4000
0 5 10 15 20 25
c y nh (m)
PI
y = -111,9ln(x) + 2954,6
0
1000
2000
3000
4000
5000
0 5 10 15
c y nh (m)
PI
9

  
P
v

  

- 

3.8,3.9, 3.10, 3.11).

           

3





3


y = 5,5096e
0,0016x

0
200
400
600
800
1000
1500 2000 2500 3000 3500
 
1m
3



3
/m
3

y = 3,6025e
0,0017x

0
200
400
600
800
1000
800 1300 1800 2300 2800 3300

 gaslift cho 1
m
3

3
/m
3

10



3










         

y = e
0,002x

0
200
400
600
800
1000
1200
1000 1500 2000 2500 3000 3500 4000

 gaslift cho
1 m
3

3
/m
3

y = 65,221e
0,0006x

0
200
400
600
800
1000
1600 2100 2600 3100 3600 4100 4600

 gaslift
cho 1 m
3

m
3
/m
3

y = 8,7358e
0,0011x

50
150
250
1700 1900 2100 2300 2500 2700


gaslift cho 1 m

3


3
/m
3

11


3.12 





 

y = 294,61x-0,624
0
500
1000
1500
0,000 2,000 4,000 6,000 8,000 10,000 12,000 14,000
Chi ph kh, m
3
/m
3

Ch s PI

y = 188,3x
-0,533

0
200
400
600
800
1000
0 5 10 15 20 25
Chi , m
3
/m
3

PI
y = 379,79x
-0,53

-200
300
800
1300
1800
0 5 10 15
Chi , m
3
/m
3

PI
12







 y, 
           
            
 


             
 , 
cho             
 
y = 573,14x
-0,33

0
500
1000
1500
2000
2500
0 1 2 3 4

Chi , m
3
/m
3

PI
y = -118,1ln(x) + 349,77
0
100
200
300
400
500
0 5 10 15
Chi , m
3
/m
3

PI
13


 .
             
          
 

           








 



           


14







15



H





T.
16

          

           


  


 
, 
, 

 



3
/m
3
;


< 300m
3
/m
3
;



< 200m
3
/m
3
;


< 150m
3
/m
3
;


<125m
3
/m
3
;


< 100m
3
/m
3
.
 




3
/m
3
;


< 190m
3
/m
3
;


< 130m
3
/m
3
;


< 100m
3
/m
3
;


< 90m

3
/m
3
;


< 70m
3
/m
3
.
 



3
/m
3
;


< 380m
3
/m
3
;


< 260m
3

/m
3
;


< 210m
3
/m
3
;
17



< 180m
3
/m
3
;


< 150m
3
/m
3
.
 




3
/m
3
;


< 570m
3
/m
3
;


< 460m
3
/m
3
;


< 400m
3
/m
3
;


< 360m
3
/m

3
;


< 310m
3
/m
3
.




3
/m
3
;


< 350m
3
/m
3
;


< 270m
3
/m
3

;


< 220m
3
/m
3
;


< 180m
3
/m
3
;


< 140m
3
/m
3
.

- 

         M   

            
 



- B 
 t, 

- 
              

18

             
            .
P
 () t
 

.








             
PI
0,6968

2
= 0,76.



- 
3
 



- 

  C          
 gaslift,
    


19

-  cho 1m
3

            




           





            

.

4.5.1 Tính toán và lựa chọn kích thước tối ưu cột ống
nâng cho các giếng gaslift có lưu lượng khác nhau trong điều
kiện giới hạn lưu lượng khai thác.

4.4 
 
3

20




- 100m
3



- 200m
3


4.10 
 -300m
3


21


4.12 
  
3
.
4.5.2 Tính toán chế độ làm việc cho các giếng gaslift có lưu
lượng khác nhau trong điều kiện giới hạn lưu lượng khai thác.


C
3


3
/ng


 c
  (
cho 1 m
3
)6.




34,4
34,6

34,8
35
35,2
35,4
35,6
200 400 600 800 1000 1200 1400 1600
ng khai
c, m
3

Chi , m
3
/m
3