Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Ho" NANG CAO H? S6 THU H 6 | VA GIA T A N G SAN Ll/ONG KHAI T H A G DAU KHf B A N G PHL/ONG PHAP KHOAN X I E N G 6 C LCIN V A K H O A N NGANG VCJI[.]
Trang 1NANG CAO H? S6 THU H 6 | V A GIA T A N G S A N Ll/ONG KHAI T H A G D A U KHf
B A N G PHL/ONG P H A P KHOAN X I E N G 6 C LCIN V A K H O A N NGANG VCJI OA THAN VA DA O A Y TRONG T A N G MONG M 6 BACH H 6
Tran Xuan Dao, Ngo Van Tu, Hoang Hdng Linh
Nguyen Quoc Phong, Pham Xuan Ngoan, Nguyen Due Du
XNLD Vietsovpetro
ABSTRACT
Improvement of oil recovery coefficient and production are pedormed by increasing contact area between bore hole and resen/oir through drilling additional wells, directional drilling with very high angle or horizontal drilling From VSP practice, drilling additional wells is limited by present offshore platforms, problem of their reconstruction has been raised but has not accomplished because of many reasons, building new offshore platforms is not
optimum solution due to expensiveness and time consumption That's why several directional wells with very high angle and horizontal wells have been drilled to Miocene, Oligocene and Basement in White tiger and Dragon oil fields Effectiveness when of these wells was proven Well oil recovery coefficient and production in these well were much higher than low angle or vedical wells Overcoming above mentioned limitations required new technological solution to make use of all present facilities and abilities for new planed wells that will be drilled on fixed platform and jacket In this paper authors suggest some major realizable technological solutions that lead to increasing oil recovery coefficient and production for White Tiger and Dragon oil fields
I THl/C T ^ KHOAN X I E N DINH HLTCJNG VA KHOAN NGANG C O A VSP
Tren thue te, kha nang thi edng xay dung eae gie'ng ed
gdc nghieng Idn hoae ed than gie'ng nam ngang d VSP da dugc
thue hien, cu the nhu gie'ng 456BT ed gdc nghieng 72.5° va
khoang lech ngang dat tdi 1929m, hay gie'ng 815BT khoan trong
ddi tugng Mioxen ed gdc nghieng 84.25° va khoang lech ngang
dat tdi 1049m vdi chieu dai than n i m ngang la 159m Khoan
cho ddi tugng Oligoxen dudi, phai ke den gie'ng 1010BT va
917BT ma thanh cdng nhat la gie'ng 917BT ed gdc nghieng
92.7° va khoang lech ngang dat tdi 1750m vdi chieu dai than
nam ngang la 418m Cho den nay, kha nang khoan eae gie'ng
ed t i m vdi xa nhit da dat dugc la 2358.7m edn gdc nghieng Idn
nhat la 92.7° Viec thi edng xay dung cac gie'ng ngang va xien
ed gdc nghieng Idn da dugc thue hien bang trang thie't bi va
edng nghe hien cd cua VSP, trong dd ed ket hgp vdi nha thau
khoan trong eae dich vu lay ehinh xien TU nhung ket qua da dat
dugc, cd the thiy kha nang thi edng xay dung gie'ng khoan
ngang va xien ed gdc nghieng Idn la khi thi trong dieu kien thue
tidn eua XNLD Hinh 1 the hien quy dao thue te da khoan d
gie'ng 428 MSP-2
II GlAl P H A P C O N G N G H E KHOAN GI^NG OA THAN
wo
1100
1 U 0 1tOO
2200 Z400
2 W 0
2800
5000
4 i a i i 9 0 ' " • ! ' • • '
-8 6 4 / 3 * 0 : : : , :
e a & f i M • : '
^ 9 3 9 / 1 1 0 0
\ 9ea/n.*o - , , ,
\l08a'20.20
\iimfSc
^ 1 2 « W 7 90
V 1587(29 50
\ l T 6 I M a - 8 0
\ l B i a ( 2 7 2 0
^ 1 9 3 V 2 8 « 0
% 2321^29
80-\
\ \ 2 6 5 1 / 2 7 «
\ ^ ^ 9 a 7 9 30
^ - ~ s [ * ^ e ! ^ 5 0
» 0 400 U O BOO 1000
Hinh 1: Quy dao thue te gieng 428
Tren thue te, hien nay tren cac gian cd dinh va gian nhe ed rat nhieu gie'ng khdng edn lam viec hoae lam
viec khdng hieu qua Vdi sd lugng mieng gie'ng tren eae edng trinh bien bi gidi han nen de dam bao san lugng
hang nam thudng phai hoae xay dung them cac gian ed dinh mdi hoae phai tan dung cie gie'ng cu de eit than
Trang 2Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Hd"
thCr hai hoae khoan gie'ng mdi tren mieng cCia eae gie'ng nay bing each eat va keo eae cot dng chdng len Do gidi han ve ket eiu va khdng gian eua cac gian khoan cd dinh va gian nhe nen viec cai hoin de tao them mieng gie'ng mdi la khdng the thue hien dugc vi nhieu nguyen nhan khae nhau Cdn viec xay dung mdi eae gian ed dinh hoae eae gian nhe cung la mdt giai phip het sue tdn kem ve vdn va thdi gian, trong khi viec cit than hai hoae eat va keo cac cot dng chdng tu cac gie'ng tan dung khdng phai khi nao cung thue hien dugc vi edn phiJ thudc vao hien trang ky thuat thue te eua eae gieng dd
Giai phap ky thuat dugc de nghi nham khae phuc nhung han che tren va tao dieu kien eho kha nang khoan va khai thac mdt gie'ng vdi hai than cung mdt luc hoae du phdng mdt than gie'ng cho phuang an phai khoan them khi cin thie't ma sd lugng mieng gieng vin khdng tang tren eae gian ed dinh va gian nhe BK
1 Khoan tren cac gian nhe hien co
Oe thuc hien dugc yeu eiu nay, ddi hdi phai sCr dung thiet bi die chung, dd la thie't bi phan nhanh (chia nhanh) dugc gin ket d eudi cot dng chdng 20" (508mm) va lam nhiem vu tao thanh hai nhinh cua than gieng Vdi viec su dung thie't bi nay, ddi hdi phai thay ddi cau true gie'ng eho phu hgp vgi ddi hdi mdi
Cau true gie'ng cin thie't phai thay ddi lai cho phu hgp nhu sau:
- Cot dng tach nude phai dugc dung loai ed dudng kinh 762mm (hoae 720mm)
- Cot dng 508mm dugc lap dat them mdt thie't bi tao nhanh die ehCing (hai nhanh) cd dudng kinh eua mdt nhinh la 340mm (hoae 324mm)
- Cot dng chdng 245mm dugc tha lung va ed sCr dung thie't bi treo va lam kin (Tie Back) trong doan dng 340mm (324mm)
- Cot dng 194mm ed lap Tie-Back va dugc keo len tan mieng gie'ng va giu vai trd lam dng khai thie
- Ong ICrng 140mm dugc tha vao mdng hoae de than trin
Thie't bi phan nhanh va Tie-Back dugc trinh bay trong Hinh 2.1
•ffl| w
U i
i l l
mm
m
• '
Ong chong SOSmni
Hinh 2.1 Thie't bi Tie-Back va thie't bi phan nhanh
Ong chong D=.MOmm
()ng lx)C
be day thanh c=l2.7inm
Ong chong D=M)mm
Gia CO hang
\i mang
Trang 32 Khoan tren cac gian nhe xay di/ng mdi
Ciu true gie'ng cin thie't phai thay ddi lai eho phu hgp nhu sau:
- Cdt dng tach nude phai duac dung loai ed dudng kinh 36"
- Hai cpt dng 340mm dugc lip dat true tiep trong dng 36"
- Cac cdt dng tiep theo dugc thue hien trong edt dng 340 mm mdt each binh thudng
Thiet bi mieng gie'ng va cay thdng eho loai gie'ng hai than dugc trinh bay trong Hinh 2.2
Hinh 2.2 Sa dd thie't bi mieng gieng kep va thiet bi cay thdng kep
III GlAl PHAP C O N G N G H $ KHOAN GI^NG OA OAY
Cdng nghe khoan gie'ng da day vdi cie than phu nam ngang trong ting mdng, bing edng nghe nay eho phep thue hien d eae than gie'ng ehinh se khoan va cac than cua eae gieng da khoan ed eae dieu kien kha thi Odi vdi cie gieng da khoan va cie gie'ng mdi, de ed the thue hien edng nghe khoan da day bing eae than phu tU than ehinh, ddi hdi cac gie'ng nay phai ed eiu true ma cdt dng chdng eudi eCing ed dudng kinh Idn han hoae bing 178mm, khoing khoan tao nhinh ed gdc nghieng tdt nhat la nhd han 45° vdi cudng do thay ddi gdc trong doan nay khdng vugt qua 1,15°/100m
1 Li/a chon quy dao than gieng
Viec lua chgn quy dao than gie'ng het sCre quan trgng, viec lua chgn nay la cd sd de lua chgn thiet bi va edng nghe thich hgp va eae giai phap thi edng Ngoai ra viec lua chgn nay se dugc quyet dinh tu dieu kien thue
te eua diem khoan (gian khoan), than gie'ng ehinh se khoan hoae da khoan, sa dd phan bd eae nut ne eua mdng
va muc dich khoan
Odi vdi eae gie'ng khoan da diy eho ddi tugng mdng md Bach Hd, viec tao nhinh eua than gie'ng chi thue hien trong mdng (tU than trin hoae md cua sd qua cdt dng chdng)
Phuang vi eua cac nhanh nay dugc chgn sao cho eat ngang cac nCrt ne eua da mdng cang nhieu cang tdt Than gieng cua cac nhanh nay phai nim ngang (gdc bang 90 do) hoae gdc nghieng Idn va se dugc chinh xac
Trang 4Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Hd"
350
700
1050
1400
1750
2100
2450
2800
3150
3500
3850
4200
4550
4300
i i ;
-J
240/1.20
382/3.30'
672/0.90
1725/2 25
; ;Vl875/8.25
- 1 r \ 2122/21 C
; ; \ 2 2 7 5 / 1 7
_ - ' L A 2 4 2 5 / 2 5
50 ; 25 •
• ' \ 2 6 0 0 / 2 6 7 5 '
J '' \ 2775/31.00
; ; \ 2 9 7 5 / 3 3 0 0
: ^ ^ « 5 5 / 3 1
; ; ; : IV3950/2
;
-: 7 4 3 8 8 / 3 1
f^" • V*^
50 i ' 06 < " • -']—
1 • ; ; ;
/25.50: ; ; ; 0/37.25 1 ; y ""
' ' ' ' • " " ' ' : :
theo dieu kien dia chat cu the Trong mdt than gieng chinh
cd the khoan tU 2 nhinh den nhieu nhanh (day) tuy thudc vao dieu kien cii the eua gie'ng, vi tri khoan va dac dien
cu the eua da mdng d khoang tao nhanh (Hinh 3.1)
2 Cac thiet bi dac chung va quy trinh thi cong
2.1 Cac loai Packer
- Packer loai ea hoe (Mechanical Set Anchors)
(xem Hinh 3.2.1, 3.2.2)
-350 0 350 700 1050 1400 1750 2100 2450 2800 3150
Hinh 3.1 Ouy dao gie'ng da day
Hinh 3.2.1 Millennium Packer and Retrievable Latch (diing trong than trin)
Hinh 3.2.2 MX Packer
and Retrievable Latch (diing trong dng chong)
Thie't bi Millennium Packer dugc dat bing cap, tao nen tang de eat than mdi Khi hudng eua packer da dugc xac dinh, mang nghieng va chdt ed k h i nang thu hdi dugc dinh hudng tren mat dat tdi diem eit xien da dugc chgn va dugc tha xudng gie'ng Khi keo len, packer dugc giu nguyen tai ehd de sCr dung sau nay, trong khi
v i n eho phep tiep can vdi cie vung phia dudi
- Packer loai thuy luc
(Hydraulic Set Anchors) (Hinh
3.2.3 va 3.2.4)
Thiet bi MX paker dugc
dua xudng gie'ng ciing vdi mang
nghieng, dugc dinh hugng, dat
bing thuy luc va eat eua sd Khi
mang nghieng dugc keo len, chdt
dugc tich khdi packer, de lai
packer tai ehd lam ed sd eho
nhurng than gie'ng phu ke tiep se
dugc khoan va de vao lai than
gie'ng phu
Anchor-Stock Pack-Stock Hinh 3.2.3 Hydraulic Retrievable
(diing trong dng chdng)
Anctior Hinh 3.2.4 Inflatable Retrievable
(dung trong than tran)
Ba loai packer nay dugc tha ciing vai mang trugt va cai dat bing nguyen ly thuy luc Day la he thdng eat than mdi mdt lan keo tha Khi tha tdi chieu sau cin thie't Retrievable Anchor-Stock dugc dinh hugng va sau dd dUde cai dat bang thuy luc Neu cin thu hdi, ehi thue hien mdt lin keo tha va than gie'ng dugc tra lai trang thii khdng cd can trd nao Retrievable Pack-Stock dugc tha va dat trong mdt lan keo tha, tuang tu nhu Retnevable Anchor-Stock Tuy nhien he thdng nay eho phep ngan each phin than phia dudi Lien lac vdi phin phia dudi dude phuc hdi bang each thu hdi neo chdt, qua trinh nay dugc thue hien trong mdt lin keo tha Than gie'ng dugc
Trang 5RUNNING TOOL
MILL (PDC or NATURAL DIAMOND)
HINGE CONNECTOR SUB HYDRAULIC SWIVEL (OPTIONAL)
tra lai trang thai khdng cd can trd nao TAM Inflatable Retrievable Anchor dugc tha, dinh hudng va dat bang thuy luc chi trong mdt lan keo tha Thiet ke cho phep packer dugc dat trong than gieng ed hinh dang khdng deu
va bao dam chju duac moment cin thiet eho viec eat dng hoae tao than phu Khi thu hdi mang xien, ed the thu hdi hoae de lai packer dudi gieng
2.2 Quy trinh thi cong
+ Ddi vdi loai Packer thuy luc:
- Tha he thdng bd md eCra sd
va tao nhanh vao gieng den
chieu sau tinh toan (Run
in Hole)
-Oinh hudng phuang vi cua
ming trugt (Orient Whipstoek)
- Cai dat Packer bing thuy luc
(Set Anchor)
- Cat chdt (Shear Off)
- Md eCra sd (Mill Windows)
- Khoan tao nhinh (Drill at Hole)
- Khoan tach nhanh ra ngoai
(Pull out of Hole)
+ Ddi vdi loai Packer ca hgc:
- Tha he Packer vao gieng
den chieu sau tinh toan
(Run in Hole)
- Oinh hudng phuang vi va cai
dat Packer bang ea hgc
(Orient and Set Anchor)
- Tha he thdng bd md cCra sd va tao nhanh cung ming trugt vao gieng den chieu sau cua packer (Run
in Hole)
- Md eCra sd (Mill Windows)
- Khoan tao nhanh (Drill at Hole)
- Khoan tach nhinh ra ngoai (Pull out of Hole)
2.3 Bg khoan cu lay goc va khoan ngang
Oe dam bao thi edng xay dung hieu qua cac nhanh nam ngang trong mdng, du kien bg khoan cu cat, lai
va ehinh xien eho cac trudng hgp:
- Odi vdi eae gie'ng khoan ed edt dng chdng eudi cung la 177.8mm va than trin 0=165.1mm:
Chodng 6" + Ding tam 5^'^' + Odng ea diy (BHS) 4^'^" + MWD 4^'^" + Cin khoan 175-180m + Bua + Can khoan 175-180m + bua + Cin khoan
- Odi vdi cac gieng khoan cd edt dng chdng eudi cung la 244.5mm:
Chodng 8"^" + Ding tam 8"'" + Odng ca day (BHS) 6^'^" + Ding tam 7"^' + MWD 6"^' + Cin khoan
1000-1200m + Can khoan
Hinh 3.2.5: Sa dd lap dat bo khoan cu cat tao nhanh trong than tran
Trang 6Hdi thdo khoa hoc "Ndng cao he sd thu hdi ddu md Bach Hd "
IV LL/A CHON \\% DUNG DICH THfCH HOP CHO THI C O N G G I ^ N G KHOAN NGANG TRONG T A N G SAN
PHAM DA MONG M6 BACH H6
Da mdng trudc Kainozoi gdm cac the xam nhap Granitoid Oa bi nCrt ne manh, dp sau phan bd tu 3050 m den tren 5000m vdi be day eua ting sin pham da mdng la tren 1000m Nhiet dd tai da mdng len den 150°C Hien
nay gradient ap suit via ehi vao khoang 0,8 Viec ap dung dung dich phu hgp se gdp phin quan trgng nang cao
hieu qua khoan, khai thac tai day Oieu dd ddi hdi dung dich can ed dp ben cau true cao, ben nhiet, do bdi tran tdt,
ty trong thip va it gay hu hai ting sin pham De thi cdng eae gie'ng khoan, dac biet la nhung gieng khoan ngang,
dung dich phai ed cau true ben vung nham giu pha rin d trang thai la ICrng va van chuyen chung len be mat Trong cie thdng sd the hien dp ben eiu true cin quan tam den do ben gel tue thgi va thgi gian sa ling eua pha ran
1 He dung dich cho tang san pham da mong
Tu dae diem eua ting sin pham da mdng va phin nghien cUu dugc trinh bay d tren cung vdi ket qua
nghien cuu ve eae he dung dich dang sCr dung tai XNLD Vietsovpetro da de cap trong nhieu edng trinh khoa hgc, chung tdi lua chon he dung dich polyme it set PAACOR de khoan ngang trong da mdng, dam bao ben nhiet, do
ben ciu true cao, dd bdi tran tdt, ty trgng thip va giam thieu anh hudng xiu den ting sin pham nay
Thanh phan va ehUe nang tUng hda pham eua he dung dich khoan lua chgn, dugc trinh bay d Bang 1
Bang 1
He dung dich polyme it set
(PAACOR)
Xanvis
Chit bdi tran
Diet khuan
Soda
Bentonit
CMCHV
Polyme silic huu ca
PAV
ChCrc nang Chinh Phu
Tao cau true Tang do nhdt Bdi tran |
-Diet khuan Ket tCia canxi Oieu ehinh pH Tao cau true Tang dp nhdt Giam dp thai nude Tang dp nhgt Tang do ben nhiet Ky nugc Giam luc cang be mat ^ , , „ , -• , nn Giam nhe ty trong
giua cac pha eua DD J ^
Nhan xet: TU eae thanh phan dung dich duac trinh bay d tren eho thiy, ba thanh phin ehinh eua he polyme
it set PAACOR la set bentonit API, Xanvis, KR-22 Set vdi ham luang nhd han 3% vUa ed tac dung tang dd ben
eiu true, dn dinh nhiet, nhung vin khdng gay bit nhet dang ke ting san pham Xanvis ed tinh chay loang cao, giup tang dp ben eiu true va giam tdn thit thuy luc khi tuin hoan Polyme silic huu ca ky nude (KR-22) gdp phin tang dd ben nhiet, tao tinh ky nude nham tang he sd thu hdi diu eho d i mdng nCrt ne He dung dich nay
ed ham luang pha ran thip nen dd ma sat va ty trpng se nhd han so vdi he dung dich set, dac biet thuan lgi eho
thi edng nhung gieng khoan ngang trong da mdng
2 Ddn pha che vdi thdng so dung dich de khoan trong da mdng
Oua hang loat eae ket qua nghien eUu thi nghiem va thCr nghiem da dua ra dugc ddn pha che va eae thdng sd eua he dung dich PAACOR nhu Bang 2
Nhan xet: He polyme it set PAACOR ed dan pha che vdi eae thdng sd dung dich nhu tren rat phu hgp khi
thi cdng khoan ting sin pham da mdng (ke ca khoan ngang), do ben nhiet, cd dp ben eiu true cao va ham lugng pha rin thip
Trang 7Bang 2
Thanh phan
dung djch
Nude ky thuat
Bentonit
CMC-HV
Xanvis
KR-22
Vietlub-150
Vietbae-21
NaOH
Na2C03
PAV
Ham lugng, kg/m^
20-30 10^12
1 3^4
10
; 10-15
1 0,5-1,5
i 0,5
5
T°,
°C
25
150 (3h)
y, g/cm' FV, s
1,01±0,02 30-35
1,01±0,02 25^30
Thong so dung djch
PV rP<, ^^' ^El-i/io, ' Lb/IOOft^ : Dyn/cm^
2^^^° 25.30
12-17/
10.15 20-25 20.25
FL, ml/30'
4-5
5-6
pH
^ 9±0,5
8,5±0,
5
3 Hieu qua ap dung he dung dich polyme it set
- So sanh gia thanh giua he PAACOR vdi eae he dung dich khae dang su dung tai md Bach Hd dugc trinh bay trong Bang 3
Bang 3
GK
BH-1011
BH-1010
BH-428
BH-1016
He dung djch
i Set - KR 22 Polymer phi set
1 Polymer it set Polymer it set
GiadUtoan USD/m^DD 100.00 220.00 110.00 110.00
Gia thuc te USD/m^ DD USD/m 69.60 68.60 175.70 181.20 92.00
67.27
235.00*
67.60
Ghi chu: * Bi mat dung dich khoan Nhan xet Gia thanh eua he dung dich polyme it set thap hdn nhieu so vdi he dung dich polyme phi set
va tuang duang vai he set - KR 22
- San lugng diu khai thac ban diu tai da mdng vdm Trung tam, a mot so gieng khoan ngang da sCr dung
nhung he dung dich khae nhau, dugc trinh bay trong Bang 4
Bang 4
No
1
2
3
4
5
6
7
_,,_,,, Oo sau thUc te khoang md ^^ San lUdng ban dau GK-BH • X • - / N He dung dich w-'I^A •••,
trong mong (m) ; a (tan/24 gio)
456 3600-5378 Set-CMC 210
478 3620-4840 Set-CMC 260
467 4015-4852
428 3740-4520
1111 3632-4300
923 i 3847-4375
Set - CMC 300 Polymer it set 926 Set-CMC 130 Set - Viet pav M 804
920 3475-4570 Set-KR22 570
Trang 8Hdi thdo khoa hoc "Ndng cao he sd thu hdi ddu md Bqch Ho"
TU ket qua nghien eCru tren eho phep rut ra mdt sd nhan xet sau:
1 He dung dich PAACOR hoan toan thich hgp de khoan trong ting sin pham da mdng nCrt ne md Bach
Hd, do ed dp ben nhiet cao han va gii thanh ha han he dung dich polyme phi set KCI-PHPA-Glyeol Cac ket qua nghien eCru eho thay, dung dich polyme it set ed eae thdng sd ky thuat dim bao va it gay anh hudng xau eho tang san pham nay so vdi he dung dich set
2 Cac ket qua nghien cCru cung chi ra rang, he dung dich tren cd eae thdng sd luu bie'n hoan toan dam bao de thi edng nhung gie'ng khoan xien cd gdc lech Idn va khoan ngang trong da mdng
V NHCTNG KHO KHAN VA T H A C H THCTC
• Chieu sau Idn: Khoan tao da nhanh (da day) deu phai thuc hien trong mdng va cd chieu sau Idn,
day cung la mdt khd khan eho viec thao tie dat he thdng mang trugt tao nhanh eho dung phudng vi cin khoan Mat khae, day cung ehinh la mdt trd ngai Idn eho viec thao va dd he thdng thie't bi mang trugt len de trien khai tiep edng doan khoan tao nhanh mdi
• Nhiet do cao: Khi khoan trong mdi trudng nhiet do cao khd khan duy nhat cd the thay la cac linh
kien bang cao su nhu cac joint lam kin hay cac thie't bi khdng chiu nhiet se mit tic nang eua nd (ddng ea day), dieu nay dan tdi kha nang lam kem hieu qui hoae khdng the thuc hien dugc
• Ap suat di thudng thap: Ddi tugng mdng ed ap suit di thudng rit thip vdi gradient ap suit bang
0.8-0.9 nen phuc tap ed the gap khi khoan trong mdng la hien tugng mit dung dich vdi cudng do Idn va trim trgng, gay nhieu khd khan eho trudng hgp khoan bing ddng ea day
• Cong nghe va thiet bi ky thuat chuyen dung: La edng nghe va thie't bi ky thuat chuyen dung mdi
nen ddi hdi phai cd thdi gian tiep can hgc hdi va lam quen
VI KHA N A N G AP D U N G C O N G N G H E XAY DL/NG GI^NG K H O A N OA THAN VA DA O A Y
• Khoan da than: Cdng nghe khoan da than ehi cd the ap dung a nhung gie'ng khoan mdi tren eae
gian ed dinh hoae gian nhe BK eho cac gie'ng khoan ddi tugng mdng tai vdm Trung tam, vdm Nam md Bach Hd
va md Rdng cGng nhu eae eiu tao khae ed cung dac diem dia chat tuang tu Nhung vdi dieu kien la phai ed eae loai thie't bi chuyen dung nhu thiet bi phan nhanh, thie't bi mieng gieng phu hgp vdi cau true mdi nay va thie't bi cay thdng eho loai gie'ng hai than
• Khoan da day: Cdng nghe nay ed the dugc ap dung eho eae gieng da khoan va eae gieng khoan
mgi trong ddi tugng mdng ed eiu true phu hgp vgi cie dieu kien edng nghe-ky thuat yeu eiu Vdi edng nghe nay khdng nhung eho phep khoan mdt hay hai nhanh ma cd the khoan dugc nhieu nhanh vgi than nim ngang trong mdng ma van su dung dugc phin than gie'ng phia dudi da khoan Cie nhanh than gie'ng nay phai de than trin , dieu nay rit phu hgp vgi dac diem da mdng eua md Bach Hd va Rdng Nhung vdi dieu kien la phai ed eae loai thie't bi chuyen dung nhu thiet bi packer, mang trugt, thie't bi md eCra sd va tao nhanh ed dudng kinh phu hgp vgi dieu kien thue te eua Vietsovpetro
TU dieu kien cu the cua cie gieng da khoan tren eae gian ed dinh va gian nhe, nhung gieng sau day ed the i p dung dugc giai phip khoan tao nhanh mai trong mdng (Bang 6.1)
• Con ngUdi: Kha nang ip dung cie edng nghe nay thanh edng hay khdng ngoai nhung yeu td va
dieu kien khich quan cdn mdt yeu td het sUe quan trgng dd la yeu td chu quan eon ngudi Viec tiep can, hieu va thao tac thanh thao cac cdng nghe - ky thuat nay ddi hdi phai ed mdt ddi ngu can bd va edng nhan ky thuat tuang xUng Oe ed dugc doi ngu can bd va edng nhan ky thuat nay thi dieu trudc tien la phai dao tao va cap nhat khoa hoe ky thuat mdt each cd he thdng va bai ban
Trang 9Bang 6.1 Ten gieng
khoan
439-BH
467-BH
556-BH
412-BH
419-BH
423-BH
432-BH
478-BH
8-BH
410-BH
414-BH
442-BH
426-BH
435-BH
436-BH
437-BH
438-BH
447-BH
457-BH
460-BH
464-BH
465-BH
479-BH
Dudng kinh ong chong sau cung, mm
245
245
245
194
194
194
194
194
194
194x178 194x178 194x178
178
178
178
178
178
178
178
178
178
178
178
Dudng kinh Khoang chieu sau dU than tran, mm kien cit tao nhanh, m 215.9 4000-4100 215.9
215.9 165.1
3500-3900 3570-3850 3850-4600 165.1 3650-4500 165.1
215.9 215.9 165.1 215.9 215.9 215.9 215.9 215.9 215.9 215.9 215.9 215.9 215.9 215.9 215.9
3600-4100 3240-3460 3500-4500 3450-4100 3400-3740 3670-4670 3900-4400 3600-4150 3400-3700 3700-4400 3700-4400 3500-3800 3840-4600 3500-3800 3850-4700 3400-3700 215.9 3500-4000 215.9 3500-4000
Goc nghieng trong l.lioang chieu sau dUkien, dp 30-45
29-32 11-12
2-9 5-9 3-8
10-15 14-31
3-8 4-8
36-39
2-9
2-12 12-17
2-8 1-2
20-35 34-38 30-40
2-3
20-28 14-23 24-34
VII.K^TLUAN
+ Tren ca sd nhung kinh nghiem thuc te trong edng tie khoan xien dinh hudng va khoan ngang d Vietsovpetro ed the khang dinh rang kha nang ap dung edng nghe khoan gie'ng da than va da day la hoan toan thue hien dugc
+ TU sd lieu thue te eua eae gie'ng khoan ddi tugng ndng nCrt ne eho phep ap dung dugc edng nghe khoan gie'ng da day vdi cie tiian nim ngang hoae ed gdc nghieng Idn
+ Oe tien hanh thi edng eae gieng khoan da than va da day can thie't phai dat mua eae thie't bi chuyen dung nhu da trinh bay d tren