Tuyin tap bao cao Hgi nghj KHCN "30 nam Dau khi Vift Nam: Cff hgi m6i, thach thuc mdi" 15]
VAN DE s t y DUNG HOA PHAM TRONG KHAI THAC VA VAN CHUYEN DAU KHI 6 CAC MO CUA XNLD VIETSOVPETRO
Tdng Canh Son XNLD Vietsovpetro
TOM T A T
Nhicng ndm gdn ddy, vdn di tdng cudng khai thde ddu tgi cdc md cua XNLD Vietsovpetro duac ddc biet quan tdm, ddi hdi phdi dp diing nhung gidi phdp him hiiu di tan thu ddu, tdng cudng khd ndng ldm viec ciia he thdng cdc thiit bi hien cd tren cdc cdng trinh biin. Phdn ldn nhirng gidi phdp ndy diu lien quan true tiip din viec sic dung cdc dgng hda phdm khdc nhau, ddn din nhu cdu ngdy cdng tdng cao. Cho nen, viec tim kiim cdc phuang phdp sir diing hod phdm d XNLD Vietsovpetro mpt cdch hiiu qud cd mpt y nghia kinh ti rdt ldn.
Nhu dd biit, ddu khai thde tgi cdc md ciia XNLD Vietsovpetro Id ddu nhiiu paraffin.
Vdn di lang dgng paraffin trong cdc giing khai thde hay trong hi thdng thu gom, xu ly vd van chuyin ddu thudng Id nguyin nhdn chu yiu ldm gidm luu lugng khai thde cua giing vd hgn chi khd ndng ldm viec cua hi thdng thiit bi. Trong mpt sd trudng hgp cd thi gdy hdu qud nghiem trgng nhu ldm rdi logn qud trinh ldm viec cua thiit bi khai thde vd hi thdng thu gom, xu ly van chuyin ddu npi bp md.
Bdi bdo ndy trinh bdy mpt sd vdn de lien quan din viec sir diing hda phdm xu ly ddu thd di hgn chi lang dgng paraffin nhdm tdng cudng khd ndng khai thde ddu a cdc giing gaslift vd phuang phdp tdy rua chiing ra khdi hi thdng thiit bi khai thac vd van chuyin ddu khi a cdc md cua XNLD Vietsovpetro.
CAC
V A N D ETRONG KHAI
T H A C V AVAN CHUYEN
D A U6 XNLD VIETSOVPETRO
Hang nam, san lugmg dau khai thac tai hai md Bach Hd va Rdng dat khoang hon 10 trieu tan. De duy tri san lugmg nay duge nhieu nam va tdi im hda cac qua trinh khai thac dau, XNLD Vietsovpetro da phai ap dung nhieu giai phap edng nghe, chang ban nhu sir dung bien phap bom ep nude de duy tri ap suat via, tang cudng khai thac dau bang phuong phap thir cap gaslift hoae bam ngam hoae xir ly khoi thdng viing can day gieng,
V.V..
Tuy nhien, theo tien trinh khai thae dau va khi, luu Iugng eiia gieng ngay cang giam, lugmg nude ddng hanh khai thac ciing dau cang tang, nhiet do ciia ddng san pham tai mieng gieng ciing giam dang ke so vdi trudc. Ngoai ra, viec bom ep nude bien cd do khoang hda khae so vdi nude hien hiiu d via lai la nguyen nhan gay lang dgng mudi, v.v... Tat ca cac yeu td tren cang lam tang them miic do suy giam san lugng dau khai thae d cac gieng. Trong khi dd, dau khai thac tai cac md Bach Hd va Rdng ciia XNLD Vietsovpetro la dau nhilu paraffin [I, 2, 3]. Nhiet do kit tinh paraffin trong diu dao ddng
152 van de sd dung hoa pham trong khai thac va van chuyen...
d mirc 57°C - 59°C, nhiet do ddng dae d khoang 32°C - 34°C. Nhiet do diu tai mieng giing eua hiu hit cac giing khai thae bang gaslift va di vao he thdng thu gom, xir ly va van chuyin diu d ndi bd md chi d khoang 35°C - 45°C, nghia la thip born nhiet do ket tinh paraffin (Bang 1).
Bang 1: Cac tinh chat ly hoa ca ban cua dau khai thac tai XNLD Vietsovpetro
STT 1 2 3 4 5 6 7 8
Thdng sd Khdi lugng rieng
Nhiet do ddng dac Do nhdt, mPa*s
Nhiet do ket tinh paraffin Ham lugng paraffin Ham lugng nhua asphalten Nhiet do ket tinh paraffin
Thanh phan phan doan chung cat %V den:
Dan vi kg/m^
°C d50°C
°C
%KL
%KL ''C
°C V din:
lOOV 200''C 300^C
Gid tri 839 32-34
5 - 7 57-59 23-25 2,2 - 2,7
95 1,5-2,3
16- 17 36,5-38 Cho nen, lang dgng paraffin xuat hien trong hau het cac dng khai thae eua gieng gaslift va thiet bj ciia he thdng thu gom, xir ly va van chuyen dau d ndi bd md. Theo sd lieu do thyc te: nhiet do eiia dau tai mieng gieng khai thac d khu vuc phia Bae md Bach Hd thap ban nhieu so vdi nhiet do ket tinh paraffin. Cdn nhiet do cua dau khai thac d cac gieng gaslift chi dao ddng d miic 26°C - 45°C (Bang 2), tire thip hom nhiet do ddng dac cua diu (32°C - 34°C).
Bang 2: Mot so thong so lam viec ciia cac gieng dau khai thac bing gaslift d md Bach Ho Cdc gieng a gidn
1 3 5 6 7 8 9 10 il
Thdng sd ldm viee a mieng gieng Ap suat, (atm)
7-13 11 -21
7-18 8-10 5-19 3-10 13-16
2-16 10-13
Nhiet do, ("C) 26-35 42-44 26-38 27-32 28-31 28-31 27-35 28-34 27-31
Sdn lugng. (t/ngd) Diu
2 - 1 0 65-67
2 - 6 0 1 - 11 19-56 2-12 9-32 1 -21 7-20
Chat Idng 45-55 83-88 8-79 I - l l 28-69
6-13 32-43
1 -29 8-42 Nhu vay, van de lang dgng paraffin ben trong dng khai thac khdng nhiing lam giam san lugmg ciia giing, ma cdn ban chi hieu qua lam viee cua cac thilt bj thudc he
Tuyen tap bap cao Hgi nghj KHCN "30 nSm Dau khi Vift Nam: Cff hgi mdi, thach thiic mdi" 153 thdng thu gom, xir ly va van chuyen dau. Phan tieh thanh phan cae mau paraffin lay tir dng khai thae d cac giing ciia md Bach Hd va tir eae dudng dng van chuyen dau da sir dyng lau dai cho thiy, ham lugmg paraffin trong cac mau lang dgng nay ed the chiem tdi 67%, nhya asphalten khoang 2 - 3%, tap chat co hgc 0,4%o va phan cdn lai la cac hgp chat muoi. Bang 3 va Hinh 1 la thanh phan cac phan doan n-paraffin eua paraffin trong thanh phan chat lang dgng lay tir dng khai thac va ben trong dudng dng dan dau sir dung lau dai.
Bang 3: Cac phan doan n-paraffin trong mau lang dong
STT
1 2 3
Cdu tir
C 2 - C16 C l 7 - C 2 g
C28+
Tong
Hdm luang. % KL trong.
Dau thd 40,5 45,6 13,9 100
Paraffin lay tir dng khai thac
38,0 41,6 20,4 100
Paraffin lay tir dudng dng da sir dung lau dai
5,8 69,8 24,4 100
y.oo
^^'^ .^"^ o^^'' .^"' o^'^'' <P^^ Z' ^^ ^^ ^^ s^ s^ &^ y ^^ / / S^^
Cdu tir
Hinh 1: Thanh phan phan doan trong cac mau paraffin
Bang 3 va Hinh 1 cho thay, phan doan n-paraffin ed khdi lugmg eao (C28 -C32) chiem nhieu hon trong thanh phan paraffin eiia mau lay tir dng sir dyng lau dai. Trong khi dd, thanh phan phan doan n-paraffin C2 - C|6 ciia paraffin trong thanh phan lang dgng lay tir dng khai thae lai nliieu nhat. Dieu nay chumg td ban dau trong dng khai thac chi tao ldp lang dgng mem do Itm lugmg ddng hdn hgp trong dng nhd. Nhung sau mdt thdi gian dai, ldp ling dgng nay dan chac hom. Nhu vay, van de lang dgng paraffin trong gieng khai thac
154 van de sd dung hda pham trong khai thac va van chuyen.
va trong cae thilt bj khai thac, xir ly va van chuyen dau d ndi bd md se lam cho thiet dien eiia chiing bi giam di dang ke. Ket qua la san lugmg khai thae ciia cae gieng nay se giam, kha nang luu thdng cua cae thilt bj edng nghe va he thdng dudng dng din dau ciing giam theo.
Sir DUNG HOA P H A M TRONG KHAI T H A C V A VAN CHUYEN D A U Of XNLD VIETSOVPETRO
Hang nam, XNLD Vietsovpetro sir dyng mdt lugmg ldn cac loai hda phim phye vu khoan, khai thac va van chuyin diu khi. Chi tinh rieng trong ITnh vyc Ichai thae va van ehuyin diu khi: hoa phim diing dl xir ly nude bom ep via da hon 1000 tan (gdm chat diet khuin, irc chi an mdn, ire ebl ling dgng muoi, chit hip thy oxy, chit ddng ty, v.v...); hda phim xir ly khoi thdng viing can day giing khoang 2000 tin (gdm cac loai axit, chat tao bgt, dung mdi huu co, mudi Cl, NO3, v.v...), hda phim xir ly va van chuyen dau (gdm chat ha dilm ddng dac, lic ebl ling dgng paraffin, chit pha nhii tuong diu nude, v.v...) nhim cai thien tinh luu biin ciia diu thd, ban chi ling dgng paraffin, khoang tren 1000 tan. De sir dyng hieu qua cac loai boa phim ndi tren da phai tiln hanh nghien eiiu ban dau trong phdng thi nghiem dl lya chgn nhumg boa phim cd hieu qua cao khi sir dyng tai dieu kien cac md Bach Hd va Rdng. Trong bao eao nay, chiing tdi se trinh bay mgt so vin de trong sir dung boa phim nhim tang cudng kha nang khai thae va van chuyen dau tai cac md Bach Hd va Rdng ciia XNLD Vietsovpetro.
1. Sir dung hoa phim giam nhiet do dac, tang cu-dng tinh lu-u bien cua dau thd de van chuyen bang du'dng ong
Nhu da trinh bay d tren, diu thd khai thae tai cac md Bach Hd va Rdng la loai dau nhilu paraffin cd do nhdt va nhiet do ddng dae cao. Khi nhiet do giam xudng dudi nhiet do kit tinh paraffin thi qua trinh kit tinh paraffin trong dau bit dau xay ra. Liic nay, dau chuyin tir trang thai Niuton sang phi Niuton, nghTa la de eho dau djch chuyen, phai cd mdt img lye tae ddng vao diu ldm horn img suat trugt ciia dau d nhiet do dd [4, 5]. Vi vay, dl duy tri trang thai chay ciia diu d nhiet do tuomg ddi thap, trudc het phai giam dugc nhiet do ddng dac ciia dau thd. Ket qua nghien eim d phdng thi nghiem (Bang 4) cho thay, sir dyng hda pham chuyen dung giam nhiet do ddng dae vdi djnh lugng 200g/t cd the lam giam nhiet do ddng dac ciia diu thd tir 32°C - 34°C xudng edn 20°C - 24°C va do nhdt hieu dyng xudng 3 lan so vdi khdng sir dyng hda pham.
Bang 4. Tinh chat liru bien ciia dau tho co va khong xir ly hoa pham
Nhiet dp
20 24 26 28 30
TDD. "C
Khdng hda phdm U'ng suat
trugt. Pa 32,7 19,1 10,5 2,8 2,3
Do nhdt deo, Pa*s
553 349 209 50 41
Do nhdt hieu dung, mPa*s
1188 732 419 106 88 3 2 - 3 4
200 e/m Ung suat
trugt. Pa 6,2 4,5 2,5 0,6 0,1
Do nhdt deo,mPa*s
183 121 61 22 12
Do nhdt hieu dung, mPa*s
307 211 111 34
14 2 0 - 2 4
Tuyin tap bao cao Hgi nghi KHCN "30 nam Dau khi Vift Nam: Cff hgi mdi, thach thuc mdi" 155 Ket qua la tinh linh ddng eua dau thd d nhiet do thap duge tang len, kha nang van chuyen dau d nhiet do dd tang rd ret, ap suat bom dau trong eae dudng dng giam di nhilu lan so vdi khdng xir ly hoa phim, dieu quan trgng la van de lang dgng paraffin duge cai thien. Ket qua thyc te nhilu nam van hanh an toan cac dudng dng cd khoang chieu dai ldn va cac dudng dng tir md Bach Hd sang Rdng d XNLD Vietsovpetro da chiing minh kha nang cai thien tinh luu bien ciia dau thd bang hda pham giam nhiet do ddng dae.
2. Su- dung hda pham han che lang dong paraffin de tang cudng kha nang khai thac dau ciia cac gieng khai thac bang gaslift
Nhu da ndi d tren, nhiet do dau khai thac d cac gieng gaslift d md Bach Hd nhd hom nhiet do ket tinh paraffin, tham ehi nhd hom ca nhiet do ddng dac ctia dau thd. d nhiet do nhu vay, kha nang linh ddng ciia dau trong dng khai thac giam di dang kl, miic do ling dgng paraffin ben trong thanh dng va thiet bj edng nghe cua he thdng thu gom, xir ly va dudng dng van chuyen dau tang se lam cho tiet dien dng bj thu hep. Nhu vay, ton hao ap suat nang dau trong dng khai thac cung nhu trong dudng dng van chuyen dau cao. Chi phi khi cdng tac cho timg gieng gaslift tang. Ket qua la sau mdt thdi gian lam viee, gieng se ngimg cho san pham. De phye hdi kha nang lam viec ciia nhirng gieng nay phai tien hanh rira ldp lang dgng paraffin trong dng khai thac bang dau ndng eiia cac gieng ben canh cd nhiet do eao hoae phai diing hoi nude ndng cao ap cua thiet bi chuyen dyng. Thye te, khai thac dau d md Bach Hd cho thay cii mdt thang phai cd 2 lan tien hanh dimg gieng de tay riia paraffin trong dng khai thae.
De ban che viec dimg gieng, cai thien kha nang lam viec eua cac gieng khai thac bang gaslift can han che lang dgng paraffin, tang kha nang luu chuyen ciia chat Itm va giam ty trgng eiia ddng hdn hgp dge theo than gieng. Tren co sd y tudng nay da tien hanh nghien ciiu sir dung hdn hgp hda pham ban che lang dgng paraffin va chat boat ddng be mat. Viee lua chgn hda pham lic che lang dgng paraffin, cai thien tinh linh ddng va giam do nhdt ciia dau thd dugc thyc hien trong phdng thi nghiem nhd thiet bj chuyen dyng Rotovisco, ngdn tay lanh va thiet bj nghien eim kha nang tao bgt. Bang 5 va 6 gidi thieu mdt sd ket qua nghien ciiu kha nang lie che lang dgng paraffin trong dau thd khai thac tai md Bach Hd.
Bang 5: Mot so ket qua nghien ciru lang dong paraffin bang phuong phap ngon tay lanh STT Dinh luang hda
phdm. (g/t)
Tdc dp lang dgng paraffin, (g/m /ngd)
Mirc dp ice che lang dgng paraffin (%)
Dau md Bach Hd 1
2 3 4
0 150 300 500
3930 2747 2680 2546
0 30,1 31,8 35,2
Bang 5 cho thiy, sir dyng chit lie ebl ling dgng paraffin cd thi giam dugc mirc do ing dgng paraffin len den 35,2%.
156 van dl sd dung hda phim trong khai thac va van chuyen.
Bang 6: Kha nang tao bot ciia dau khi co tac dung ciia chat hoat dong be mat STT Dinh lugng hda
phdm, (g/t)
The tieh bgt, (ml)
Mirc do tgo bgt so vdi khdng cd hda phdm, (%)
Dau md Bach Hd 1
2 3 4 5 6
0 100 200 300 400 500
45 50 55 50 45 45
- 11 22 11 - -
Chat boat ddng be mat sir dung trong hdn hgp vdi chat lie che lang dgng paraffin cho cac gieng gaslift nham tang cudng kha nang tao bgt cua hdn hgp dau va nude vdi khi ddng hanh. Nhu vay, khdi lugng gieng ciia ddng hdn hgp dau - nude - khi se giam, tdn that thuy lye eho viee nang san pham len mieng gieng ciing giam dang ke. Bang 8 la mot sd ket qua nghien eiiu d dieu kien phdng thi nghiem ve kha nang tao bgt eiia dau khai thac d khu vyc phia Bae md Bach Hd d nhiet do 50°C vdi cac djnh lugng hda phim khae nhau.
Nhu vay, neu sir dyng chat boat ddng be mat de bom vao ddng hdn hgp dau - nude - khi thi mirc do tao bgt cua dau se tang them 22% so vdi khdng sir dyng hda phim. Tren ca sd ket qua nghien cim d phdng thi nghiem da tiln hanh thir nghiem edng nghiep tai mdt sd gieng gaslift d gian 5 (MSP-5) va 7 (MSP-7) d khu vyc phia Bie md Bach Hd bing each bom vao ddng khi gaslift hdn hgp hda phim irc chi ling dgng paraffin va chit boat ddng be mat. Ket qua thu duge trinh bay d Bang 7.
Bang 7: Ket qua thir cong nghiep hoa pham tang cudng kha nang khai thac dau cho cac gieng gaslift
Gieng
104 510 145 715 704
Lmi lugng ddu, (t/ngd)
Khdng hda pham
12,6 28,1 11,4 11,8 8,2
Cd hda pham
20,1 42,6 13,6 15,7 8,4
Mirc dp tdng sdn lugng,
(%)
38 34 19,8 33,1 2,4
Chi phi khi cdng tdc.
(m^/t) Khdng hda
pham 450
168 367 259 379
Cd hda pham
303 133 275 232 277
Mire dp gidm khi edng tdc.
(%)
32 21 25,0
10,3 27,0
Ket qua thir nghiem cdng nghiep eho thiy, khi bom hon hgp hda phim lic ehi ling dgng paraffin va chat hoat ddng bl mat vao ddng khi cdng tac eiia eae giing khai thac bang gaslift, san lugng diu ciia nhiing giing nay tang 2,4 - 33%, chi phi khi edng tae cung giam trung binh 25%. Cac sd lieu do thuc tl cho thiy trong thdi gian 30 - 40 ngay thir nghiem tai cae gieng d gian 7, tdng lugmg diu khai thac them d gian nay len tdi 225 - 355
Tuyin tap bao cao Hgi nghj KHCN "30 nam Dau khi Vift Nam: Cff hgi mdi, thach thde mdi" 157 tan. Ngoai ra, viee sir dyng hda pham de xir ly cac gieng gaslift cdn lam tang thdi gian dimg djnh ky gieng dl tiy rira paraffin trong dng khai thae len khoang 15-17 ngay so vdi khdng sir dyng hda pham.
3. Su- dung hda pham de tay rira lang dong paraffin trong gieng khai thac nhim phuc hoi kha nang lam viec cua gieng
Viec sir dyng hda pham de xir ly san pham gieng khai thae hay cho van chuyin bing dudng dng nham cai thien ddng chay, ban che lang dgng paraffin khdng thi giai quylt triet de van de lang dgng paraffin. Vi vay, sau mdt thdi gian lam viec, giing se ngimg eho san pham vi bj tac nghen bdi paraffin. De phye hdi kha nang lam viee eiia giing cin tiy rira ldp lang dgng paraffin trong dng. Nhirng nam gin day, XNLD Vietsovpetro sir dyng nhiet do eao ciia dau d cac gieng ben canh de nia lang dgng paraffin d cac giing ndi tren.
Tuy nhien, do chieu dai dng khai thac ldn nen trong nhieu trudng hgp hieu qua rira thip.
De dat hieu qua hon, da tien hanh nghien eiiu lya chgn hda pham tay rira paraffin trong cac dng khai thac d nhiet do thap. Nhu da biet, thdi gian lam viec ciia cac giing gaslift cd nhiet do thap cang dai thi lang dgng paraffin cang ran hon, cac paraffin phan tir cao trong thanh phan lang dgng cang nhieu, viec tay rira paraffin cang phiic tap. Vi vay, de cd hieu qua da sir dyng hdn hgp dung mdi thom eao phan tir vdi chat lie che paraffin hay td hgp sinh hda. Chat ire che paraffin hay td hgp sinh hda ed tac dyng tham udt va tham nhap cau true ran chac paraffin, cdn dung mdi thom eao phan tir ed nhiem vy hda tan paraffin. Ket qua thir nghiem kha nang hda tan paraffin d dieu kien phdng thi nghiem dugc trinh bay trong Bang 8.
Bang 8: Mirc do hoa tan lang dong paraffin ciia mot so hoa pham Mdu
paraffin
c,
C2
Ten hda phdm
Td hgp hda sinh va dung mdi Dung mdi lie che paraffin Xylen
Td hgp dung mdi va sinh hda Dung mdi lic che paraffin Xylen
Nhiet dp hda tan "C
30 40-50 40-50
30 30 40-50 40-50
<30
Thdi gian ngdm paraffin, ngdy
8 3 3 8 8 3 3 8
Mirc dp hda tan.
% 30 60-70 60-70 25-35
70 80-90 80-90
70 Ghi chit: Cl - Mau lang dgng paraffin lay d cac dng dan dau sir dung lau dai
C2 - Mau lang dgng lay tir dng khai thac cua gieng d gian 7
Ket qua cho thay, de dam bao kha nang tay rira cao can ngam cac chat lang dgng paraffin trong dung mdi lie che paraffin d nhiet do khdng thip ban 40°C va duy tri khoang thdi gian tdi thieu la 72 gid. Nhiet do tay rira cang thip thi mirc do hoa tan paraffin rin cang kem va thdi gian ngam lang dgng trong dung mdi lic ebl paraffin cang phai dai.
158 van dl sddung hda phim trong khai thac va van chuyen...
Tren co sd ket qua nghien eiiu phdng thi nghiem da tiln hanh thir nghiem cdng nghiep d 2 giing 801 va 811 eiia gian MSP-8 md Bach Hd. Kit qua xac djnh kich thudc dudng kinh dng khai thac sau thdi gian tay rira paraffin 60 - 80 gid eho thay, phan ldn ling dgng paraffin trong dng khai thac dugc day ra ngoai. Sau dd, giing dugc dua vao van hanh. Kit qua khao sat gieng lam viec trudc va sau khi tay rira paraffin ciia cac gieng 801 va 811 dugc trinh bay trong Bang 9.
Bang 9: Cac thong so lam viec thuc te ciia gieng 801, 811 trirdc va sau khi tay rua lang dong paraffin
Thai diem do
Lim lugng. (t/ngd) vd nhiet dp ddufC). a mieng Giing 801
Ldng Diu Nhiet do
Giing 811
Ldng Diu Nhiet do Trudc khi tay rira lang dgng paraffin
3-4/2 10-12/2 17- 19/2 24 - 26/2
2-4/3 9-11/3 16-18/3 Trung binh
28/3 - 1/4 6-8/4 13-15/4 27 - 29/4 3-6/5 10-13/5 Trung binh
Tang, %
40 29 6 39 35 34 9 27,4
32 21 5 27 25 26 7 20,4
31 31 28 31 31 30 30 30-31
14 21 15 21 14 13 16 16,3
10 15 12 16 11 10 13 12,4
30 29 29 31 31 30 30 30 Sau khi rira lang dgng paraffin
31 28 25 30 34 28 29,3
-
23 22 18 29 27 21 23,3
14
31 30 30 31 32 32 30-32
-
42 17 12 19 18 24 26,4
-
25 13 9 15 14 18 15,7 26,6
30 30 30 30 30 30 30
-
Ket qua d Bang 9 eho thiy, sau khi tay rira chit ling dgng paraffin, luu lugng ciia giing tang trung binh 14 - 26%. Ngoai ra, thdi gian thye tl phai dimg giing dl tiy nia djnh ky lang dgng paraffin ciia cac giing ndi tren da tang them 40 - 45 ngay.
KET L U A N
Van de lang dgng paraffin trong cac gieng khai thac hay trong thilt bj cdng nghe ciia he thdng thu gom, xir ly va van chuyen dau la nguyen nhan lam giam kha nang khai thac dau ciia giing va ban che hieu qua lam viec ciia he thdng cac thilt bj cdng nghe tai cac md diu.
Tuyin tap bao cao Hgi nghj KHCN "30 nam Dau khi Vift Nam: Cff hgi mdi, thach thde mdi" 159
• Sir dyng hda pham chuyen dyng giam nhiet do ddng dac cd the giam nhiet do ddng dac eua dau thd xudng d mire 20°C va giam do nhdt hieu dyng ciia nd din 3 - 4 lan, dam bao kha nang van chuyen dau bang dudng dng ngam dudi day bien khdng bgc each nhiet vdi khoang chieu dai ldn.
• Viee bom hdn hgp hda pham giam nhiet do ddng dac, chat ire chi ling dgng paraffin nham cai thien ddng chay eua chat ldng trong dng, ban chi ling dgng paraffin va chat boat ddng be mat ed the lam tang san lugmg eiia giing khai thae len den 15 - 20%), ddng thdi giam chi phi khi gaslift den 25%).
• Sir dyng hdn hgp dung mdi vdi chat ire che lang dgng paraffin hay hdn hgp sinh hda ed the tay rira phan ldn chat lang dgng paraffin khdi dng khai thae, phue hdi kha nang lam viec ciia gieng va lam tang dugc san lugmg khai thac. Ngoai ra, edn lam tang thdi gian dimg djnh ky gieng khai thae de lam sach paraffin.
T A I L I E U THAM K H A O
1. Phung Dinh Thuc, Tong Canh Son, Ha Van Bich, 2000. Complexity and technological solution in gathering, processing and transporting high wax crude oil of the Rong field. Petrovietnam Review, Vol. 4, p. 16-21.
2. Ha Van Bich, Tong Canh Son, Le Dinh Hoe, 2003. Gathering, treatment and transportation systems in development and production of White Tiger field.
PetroVietnam, Technical forum "Cww Long basin production - challenges opportunities - 2003", p. 138 - 149.
3. Nguyen Thuc Khang, Ha Van Bich, Tong Canh Son, Le Dinh Hoe, 2003. Transporting oil and gas mixture in gathering system at White Tiger oil field. SPE-80507, Asia Pacific Oil and Gas Conference and Exhibition held in Jakarta, Indonesia, 15-17 April 2003.
4. Phung Dinh Thuc, Ha Van Bich, Tong Canh Son, Le Dinh Hoe, 1999. A new approach to study on thixotropic properties of wax crude oils from Dragon and White Tiger fields offshore Vietnam. SPE-54374, Asia Pacific Oil and Gas Conference and
Exhibition held in Jakarta, Indonesia, 20-22 April 1999.
5. Phung Dinh Thuc, Ha Van Bich, Tong Canh Son, Le Dinh Hoe, 2003. The problem in transportation of high wax crude oil through submarine pipeline at JV Vietsovpetro oil field, offshore Vietnam. Joumal of Canadian Petroleum Technology, June 2003, Vol.
42,N''. 6,p. 15-18.
