Bài học kinh nghiệm về công tác hoàn thiện giếng tại bể cửu long

THAM DO • KHAI THAC DAU KHi BAI H O C KINH NGHIEM VE CONG TAC H O A N THIEN Gie'NG TAI BE CJU LONG ThS Vu Manh H^o, ThS Le Quoc Trung, KS Le Vu Quan Vi$n Ddu khf Viet Nom Email: haovm@vpi.pvn.vn Tom t^t Be Cdu Long Id khu vUc co nhieu md ddu dugc phdt hien vd dang glai doan khai thde nhumd Bach Ho, Rdng, Rgng Ddng, SU TdDen, SU Td Vdng Dieu kien dja chdt eda be khdng cd phdc tap Idn, nhien qud trinh khai thde dd xdy mdt sosUcd: cdt xdm nhdp, ngdp nUdc vd ldng dpng paraffin ddn den gidm tuoi thg gieng, tdng chi phixdlfsucdvd sda chda gieng, Idm gidm hiiu qud khai thde Bdi viet ddnh gid hien trgng cdng tdc hodn thien giing, rut bdi hge kinh nghiem cho cong tdc thiet ke, thi cdng vd djnh hudng sddung cdng nghe hodn thiin gidng tuang lai TUkhda: Hoan thien gieng, be CCfu Long, cdt xdm nhap Gidi thieu Cong tac hoan thien gieng be Cfru Long Cdng tac hoan thien gieng la moi quan t i m hang be Cdu Long, cac gieng khai t h i c tai tang cat ket dau eua cic nha thau dau khf de d i m b i o cho q u i trinh Miocene va Ollgocene sd dung cdng nghe hoan thien khai thic dau khf lau dai va hieu q u i Suthanh cdng cua gieng don de khai t h i c mdt hoae nhieu tang sin pham cdng t i c hoan thien gieng gdp phan cho gieng van hanh ddng thdi, sd dung cdng nghe hoan thien gieng kep de an toan, giam thieu thdi gian va ehi phf cho cdng t i c sda khai thac c i c tang s i n pham rieng blet Phaong phap gieng sau hoan thien via chufa thudng sd dung la t h i ong chdng, Dja tang tram tfch be Cdu Long cd anh hudng Idn den cdng tac hoan thien gieng Khu vUc n i y chu yeu la cac tram tfch cd tudi Miocene, cd tinh bd rdi v i dd gan ket yeu, dd nguy CO cat xam n h i p vao gieng rat Idn tram xi mang va ban due 16 dng chdng Tai cac khu vUc cd nguy co khai thac c i t cao, phan via chufa hoan thien kieu than tran ket hop lap d i t ludi chan eat Tai tang mdng, cac gieng thudng dupe hoan thien bang each sii dung mdt cdt dng khai thac, phan via chda hoan thien D i mdng trudc Cenczoic d be Cdu Long chu yeu la kieu than tran cac da xam n h i p granitoid vdi phan khdng ddng nha't daoc ket tmh d cac dieu kien dja chat va thdi gian De nang cao hieu q u i khai t h i c , dam b i o an toan khic Dac tfnh chda eua da mdng d be Cdu Long q u i trinh van hanh khai thac, g l i m thieu chi phf, khdng ddng deu mdt md va gida cac khu vUc.Tai be eic nha thau da ap dung nhieu giai p h i p , cdng nghe CCfu Long, cic gieng khai thac ddi tUong mdng ehlem gan va thiet bj tien tien hien dai qua trinh hoan thlfen 50%, cic gieng deu duac hoan thien kieu than tran di't gieng nhU: da he d day cd tfnh ran chic va dp dn dinh cao Tuy nhien, ddi tUpng cd die tfnh bat ddng nhi't cao, vdi nhieu khe ndt, nirt ne Idn; cac gieng dapc hoan thien kieu Sd dung packer truong nd de khai t h i e ddng thdi nhieu tang sin pham va kiem soit hl^n tUOng ngap nUdc, dae biet khai t h i c tai tang mdng than tran, gay khd khin viee kiem soit hien tUpng ngap nude Ap dung cdng nghe hoan thien gieng kep viee khai t h i c neng biet nhieu t i n g sin pham Trong bai viet nay, nhdm t i e g i i d i n h gia viec ufng dung cdng nghe edng t i e hoan thien gieng tai tren 350 gieng khai thac d be CCfu Long Tren co sd do, nhdm Sd dung ludi chan eat ddi vdi cic md cd nguy cd bl catxam nhap eao t i c g i i phan tfch hien trang khai thie eua cie md, de xuat Cac yeu to anh hUdng den cdng t i e hoan thien gieng phuong i n thiet ke h o i n thien gieng phu hpp, danh gia gdm: dieu kien dia chat, chieu sau mUe nude bien, nhiet ddng t h i i gieng va tim eic nguyen nhan gay cac khd dp va i p suit via, t h i n h phan H^S va CO Tuy nhien cic khan, phUe tap cdng tac hoan thien gieng yeu td khdng i n h hudng idn vi cic ket q u i nghien edu 12 OAUKHl-Sd 12/2014 PETROVIETNAM 2.1 Cong ngh4 va thiet bj hoan thien gieng cho thay dieu kien dja ly t u nhien cCia be Cdu Long khdng q u i phdc tap, ham lapng CO^ va H^S thap Mdt sd md khai 2.1.1 Doi tuong Miocene va Ollgocene t h i c tai ddi tupng Miocene d khu vUc dat da he cd tfnh chat bd rdi, lien k^t kem, d i xay hien tUpng c i t Cic gieng tai be Cdu Long chu yeu i p dung phuong xam nhap v i o gieng C i t xam n h i p tap trung nhieu d khu p h i p hoan thien gieng don Mdt sd gieng d md Ruby, vUe Ddng Bac be Cdu Long noi tram tich Miocene ed dd Pearl sd dyng phuong phap hoan thien gieng kep PhUPng phap md via phd bie'n nhat ddi vdl cie gieng khai rong > 19% (Hinh 1) thie tai ddi tUpng Miocene la ban due Id dng chdng Day Do tinh chat dau tai be Cdu Long cd ham lupng la phuong phap hoan thien don g i i n v i tiet kiem chi phi, paraffin eao (mdt sd md cd ham lUpng paraffin > 25%), song ed the xiy hien tUong cat xam nhap vao gieng tfnh chat cua node via, sU thay ddl nhiet dd i p suat Do vay, viec ap dung phUPng phap chi dat hiiu qua gieng nen qua trinh khai t h i e x i y tai eic md khdng cd nguy co xiy c i t xam nhap hien tapng l i n g dpng paraffin, lam giam s i n lupng qua trinh khai thac Tai cac gieng khai t h i c tai ddl tUpng khai t h i c [1,5] Ollgocene md Bach Hd, die tinh dat d i e d dp on djnh cao hon nen ap dyng phuong p h i p md via kieu than tran Ddl vdi cac md cd nguy co cat xam nhap cao, phaong p h i p hoin thien via dang t h i n tran ket hpp vdi ludi ch^n eat la giai p h i p tdi Uu nhat Dieu da dupe minh chdng bang hieu q u i kiem soit c i t tot tai cac gieng d md SaTCf Den, Rang Ddng De kiem soit cat thudng sd dung ludi chan cat ddc lap, lUdi chin c i t chen sdi, ladi chin cat gian nd Trong do, lUdi chan eat ddc l i p dupe sd dung phd bien tai md Su Td Den, Rang Ddng, Pearl be Cdu Long, tiet kiem chi phf va hieu qua kilm soit c i t va khai thac cao (Hinh 2) Phuong Hinh So (demo xual hien cdt xdm nhap tai be Cilu Long phap kiem soit c i t bang ludi chan c i t chen sdi dupc i p dyng tai mdt sd • STD >RD • Ruby • Pearl 15 14 t i H F hiili chSn cat a6c Bp gieng md Ruby, song hieu qua khdng cao c i t bit nhet xung quanh ludi, lam g i i m kha nang khai thic 2.1.2 Doi tugng mong nutne Mdng nut ne la ddi tapng khai t h i c chinh eua be Cdu Long vdi gan 200 gieng khai thac va bom ep Cic gieng hoin thien mdng dUOc thiet ke vdi eiu true mdt cdt dng khai thie va hoan thien via kieu than tran Lifcit chan cat chen s( PhUorng phap kiem sodt cdt Hinti Phucmg phdp hem sodt cdt dp dung cho cdc gieng khoi thac tai Miocene Packer trUong nd dUdc i p dung tai nhieu gieng md SuTdDen, SuTd Vang, Ci NgU Vang nham ngan each olu KHi-sd 12/2014 13 THAM DO - KHAI THAC D A U KHI khoing n g i p nUdc ddi vdl cic gieng khai thac tai • • g Qua trinh hoan thien gieng ed vai trd quan trpng, anh hudng den k h i nang khai thic va tudi thp cua gieng Vi vay, trudc gieng dua v i o hoan thien, cae nha thau tien hinh nghien cdu, lUa ehpn cdng nghe = va thiet bi phu hpp d i m b i o k h i nang khai t h i c tdt nhat Su cd xiy q u i trinh hoan thien gieng duoc xdly kip thdi ° in lfmli3.Packettnmgnclsi(dungtaicdcgiengkhaithdctiongtdngmDng Trong qua trinh khai thie, cac md thadng xua't hien hien tupng lang dong paraffin va mudl vd cP, -^ lam giam sin luong khai thac, tang thdi gian va chi phf sda gieng Cic gieng khai thac d tang cat ket L ll Miocene x i y hien tUpng c i t xam nhap, neu khdng sd dung bien phap kiem soit c i t se gay mdn thiet bj ll Idng gieng va cac thiet bj khai thac be mat, lam g i i m IdlttllMiii^i^itil Cit x i m n h i p la hien tupng thadng g i p tai cic gid'ng khai thac doi tupng c i t ket Miocene, ndi ma thinh he cd tinh bd rdi va gan ket kem Hien tUpng xiy tai mot so md Ruby, Rang Ddng, Rdng Hinli San iuong khai thac cua giSng RD-1 BAng Thong k^ ham luang cot khai thde tai mot so gieng mo Ruby Ten gieng Tai md Rang Ddng, c i t xam nhap x i y tai mpt T h d i gian D o i lu'dng k h a o sat so gieng khai t h i c tang Miocene Trong do, gieng RB-1 1/3/2011 RD-1 da phai ddng gieng de sda chda va nao vet c i t , RB-2 2/3/2011 RB-3 5/3/2011 RB-4 7/3/20ri_ Miocene-10/20 I Miocene-9 Miocene-9/~l dupe tiep tuc dUa vao khai thac va sin lupng khai RB-5 9/3/2011 RB-6 17/10/2010 IVliocene-20 (Hinh 4) [3] RB-7 15/10/2010 IVliocene-9/10/30 RB-8 10/3/2011 Miocene-9/10 Da so cac gieng khai t h i c tai md Rang Ddng 6,31 " fVliocene-9/10/20 thac cua gieng hien dat khoang 700 thiing/ khdng lap dat lUdi ehan cit Vi viy, phUdng phap ^^^Pf i r j " 2.2.1 Hiin tugng cdt xam nhap cat chay cao 200 Ift/ngay (2003) Sau dd, gieng • STD ^^m 2.2 sued phdc tgp vd biin phdp khde phuc kha nang khai thic cua gieng j 11 tang mdng (Hinh 3) IVliocene-10 RB-9 16/2/2010 Mong RB-10 18/10/2010 Miocene-9/10 kiem soit c i t hien la kiem soit gieng de cd the khai thac an toan ham lapng cat td 0,01 - 0,1 % the tfch va cac thiet bi dupc n g i n chan mai mdn bang cac bp t i c h Ipc eat tren be mat Khi ham luong c i t vUdt ngudng tren thi giim cdn hoac ddng gieng Cac gieng khai thac cua md Ruby da phan khdng sd dyng bl^n phap kiem soat cat, dd c i t xuat hien sin pham vdl ham lapng tCf - Opptb (pound per thousand barrel), tham chf cd gieng ham lapng c i t vuot q u i gidi han cho phep la ISpptb Mdt sd gieng lap dat ludi chan c i t chen sol nhang khdng dat hieu qua cao Trade tinh hinh do, phuong thde quin ly md dapc xem xet va cap nhat cho phu hop nham phyc 14 DAU KHU 3612/2014 jy 11 ( \ Hinh S Trong r/?a/ khai thac cua cdc gieng tai lang mong mo Sif lUBen PETROVIETNAM vu khai thac dau mdt each hpp ly nhU: theo doi va giam sat ham luong c i t sin phi'm dau tung gieng nhd hon mde eho phep ISptb; thudng xuyen khao sat gieng de kiem soit bang chenh ap va ddi can thiet giim cdn khai thic; djnh ky kiem tra tinh trang Idng gieng de cd glii p h i p kjp thdi, nghien cUu lap dat lUdi chin cat de kiem soat cit Thdng ke lupng c i t qua trinh khai thac tai mdt sd gieng md Ruby (Bing 1) [3], thing, dp ngap nude len tdi 70 - 80%, khien nhieu gieng 2.2.2 Vdn de ngap nUdc doi vdi cdc gieng khai thac tgi bien phap can thiep va sda chda gieng, dac biet la each ngUng phun Do ngap nude trung binh eda ddl tuong mdng md Bach Ho tai t h i n g 1/2007 la 12,7% va chi cdn 30 gieng khai thac eho ddng san pham khdng lan nude Trong dd, 11 gieng cd san lapng rat thap Bing the hien dp ngap nUdc giai doan 2006 - 2007 eCia mot sd gieng khu vUc trung tam md Bach Ho Trudc tinh hinh dd, Vietsovpetro da thuc hien cac ly khoang ngap nadc tdt, dd ngap nude trung binh tang mong cua ca ddi tUdng mdng tang cham, dp ngap nudc Do die thil cua khai t h i e t h i n d i u mdng ndt ne, san pham nam 2008 la 17% [4] ngap nude eua gieng t i n g len r i t nhanh Mdt sd gieng khai thac d ddi tupng mdng md Bach Hd, SuTdDen, SUTd 2.3 Bdi hge kinh nghiem eong tdc hodn thien gieng Vang deu xay hien tupng Cac gieng khai thac ed dp 2.3.1 DOI tuang Miocene, Ollgocene ngap nude cao gay i n h hudng xau den he thdng khai t h i c Theo cac tai lieu tdng hpp, cic phddng p h i p hoin thien gieng tai be Cdu Long gdm: md via bang chdng dng, tram xi mang va ban due Id dng chdng (dupe ap dung chu yeu tai cac md Bach Hd, Rdng, Ruby - Pearl, Rang Ddng - Phuong Ddng); md via t h i n tran ket hdp lUdi chan c i t (dUdc i p dung chu yeu tai md SuTdDen va mdt sd gieng khoan md Rang Ddng - Phuong Ddng) nhU: ddng gieng, chuyen sang khai thac ddi tUOng khic hoac p h i i Ung dung cae phUPng p h i p cp hpc hay chuyen sang khai t h i c theo chu ky Trang t h i i khai t h i c v i mde dp n g i p nUdc eda cac gieng tai tang md SuTdDen, SUTd Vang daoc the hien tren Hinh va [3] Nude xua't hien ddng san pham khai thic tai tang mdng md Bach Hd t d cudi nam 1994 Chi sau vai Cdng nghe hoan thien gieng ddn va cdng nghe S^nlirongkhaith^o hoan thien gieng kep: gieng m i Si/TCf Ving Cdng nghe hoan thien gieng ddn dupc sd dung chu yeu tai cic md va cho hieu qua khai thac cao Cdng nghe hoan thien gieng kep dupe Petronas ap dung cdng tai mdt sd gieng khai t h i c md Ruby, Pearl de khai thac rieng blet cac tang sin pham Cie gl^ng h o i n thien kep deu cho sin lupng khai t h i c dau cao hon cie gieng hoan thien don khai thac cung ddl tupng san pham Dieu da dUOc minh chUng tai gieng RB1P, RB-2P sd dyng hai cdng nghe hoin thien gieng khic de khai thac cung ddi tupng chinh Mlocene-9 va Hinh Trgng thdi khai thde cUa (dc gieng tai tdng mong mo SU Ti Vdng Mioeene-10 (Bing 3, Hinh - 9) [1 ] Bach Sdng Bg ngdp nudc cua cdc gieng crkhu vifc tmng tdm n Ho Gieng k h o a n edngap nudc(%) 1/2006 1/2007 BH-1 BH-2 BH-3 BH-4 BH-5 BH-6 49,1 55,2 23,1 74,9 2,5 BH-7 14.5 79,9 24,9 64,2 67,3 70,2 76,4 46,9 Bdng 3, Bdc trung sdn iUong khai thac ddu cua gieng RB- IP, RB-2P Gieng Kieu hoan thien Ddi tupng khai thac chinh Luu lupng dau khai thac trung binh (thiing/ngay) San luang dau khai thac cpng ddn (trieu thung) Op ngap nudc trung binh (%) RB-1P RB-2P Hoan t h i e n kep Hoan t h i e n d o n MiOcene-9; fVliocene-10 Miocene-9; (VIiocene-10 800 500 0,95 0,7 ••V THAM DO - KHAI THAC DAU KHI Nhuvay, SO vdi gieng h o i n thien don RB-2P, gieng hoan thien kep RB-1P cho hieu suat khai thac tdt hon Ket q u i khai thie cho thay n g i p nUdc cua gieng RB-1 P sau tang eao (tren 20%) thi den ehi cdn khoing % va lUu lUpng khai thie on djnh vdi tren 500 thung/ngiy Ddl vdi gieng RB-2P, dp ngap nadc hien khoang 15%, nhien lau lupng dau khai t h i c thap (dudi 100 thung/ ngay) Do Uu diem eda gieng hoan thien kep, Petronas da ap dung bien p h i p hoan thien gieng n i y cho cac gieng mdi dUa v i o khai t h i c cCia md Pearl Ket q u i cho t h i y gieng cho sin lUdng dau khai t h i c cao (tren 2.000 thiing/ngiy) Petronas dang tiep tue nghien cdu i p dung cdng nghe h o i n thl&n gid'ng kep cho cac gieng p h i t trien khai t h i c sip tdi, dac biet tai cae khu v\Jc cd nhieu tang san pham va cd tfnh chat via tdt 4T—1—-/-^—=" « i SM l / p f P T^in f • 1 Hinh San lUang ddu khai thde gieng RB-1 PL \ Cau true hoin thien gieng don va hien tai Hinh 10 [2] i™ tllT^ 'it m X hoin thien gieng kep dien hinh tai cac gieng khai thic md Ruby, Pearl dupe the "T*^ "=* Cdng nghe hoan thien gieng sd ll dung ludi chSn cat ddc lap: Trong qua trinh khai thic, hien tUdng Kinii San luong ddu khdi thdt gieng RS-IPS eat khai thac xuat hien tai nhieu gieng md Ruby, Rang Ddng, Rdng Ddi vdi cie gieng khdng l i p dat thiet bi kiem soat cat d giai doan dau phat trien md, phai g i i m chenh i p de han ehe c i t x i m nhap Bien phap chi mang tfnh tinh the vi i i m giam lUu lupng khai t h i c va hieu qua kiem soat cat khdng cao Vi vay, cae gieng mdi p h i t trien khai thic g i n d i y {ed nguy cd khai thac c i t cao), dupe de xuat lap dat thiet bj kiem soat c i t de ngan ehan c i t sin pham khai thac Cae gieng sddung ludi chen sdi tai md Ruby, qua trinh khai thie cho thay hieu q u i khdng cao, khdng ngan dupe hien tapng c i t x i m n h i p v i o gieng v i g i i m hl^u q u i khai thac Gieng R-3P md i m - Y/ ^ fPl r n ti n l If] |!rl!m, y| ]!LU D !WJF Hinh Son luang ddu khoi thde gieng RB-2P cdn khoang 600 thCing/ngiy, sin lupng hien tai cua gieng chi cdn khoing 400 thung/ngiy (Hinh 11) [3] Ruby sau ddde l i p dat lUdl chen sol va PhUPng phap kiem soit cat sd dyng eho eac md d khu vue la sd dung tien hanh xd ly acid, san lUpng khai t h i c ludi ehan c i t ddc l i p v i sddung phUPng phap chen sdi Ludl c h i n c i t ddc t d tren 1.000 thung/ngiy g l i m xudng chi l i p la giii phap tdt nhat cho eic via Miocene tai cac md eda Cuu Long JOC, 16 DJiU KHi-SO 12/2014 PETROVIETNAM I " iBintnffliiw coupling) V u an totn 2-7/8- Ong chdng S-S/S- • VantfWt|SSDlJ-l/J' Vu)tn>^(SSD) 9-ilt-fMkB k»MiaM.HH9a) ""i:E: : \ DotnSDgchiBg ; ininiin(blin jomO a.s/a'PHLfw*« BlutJoim 1 tSMim-BOfUrt Mrc*ằô VuitnntfSSI)) ! ã / W/nft 70 Cong nghe hoan thien gieng dan (ben trdi), gieng kep (ben phdi) tai mo Ruby va Pearl JVPC, Petronas Cic gieng khai thac tai d i y dUdc lap dat ludi chan c i t ddc lap va q u i trinh khai thac khdng xay hien tUdng cat xam nhap vao gieng Phuong phap chen sdi dUoc ap dyng tai mot sd gieng md Ruby da lam tang he sd skin va giim hieu qua khai thic Ladi chin c i t ddc lap sd dyng ludl Ipc d trudc khoing khai thac, ed the ap dung hoan thien gieng than tran va gieng chdng dng Khac vdi lUdi chen sdi, khoang khdng vanh xuyen gida lUdl va gieng khdng chdng dng (hoic da chdng dng) rdng Cd loai lUdi thdng thadng dupe sd dyng la: dng Hinh 11 San luang khm thac cua gieng R-iP, mo Ruby loc quan day (wire wrap screen - WWS) va dng Ipc dang lUdl (premium screen - PS) (Hinh 12) Ong Ipc quan day (WWS) gdm bd p h i n ehfnh: dng dye 16, cai (support rod) va day quan (wire w/rap) 6ng loc dang lUdl (PS) cd bd phan chfnh: dng dye 16, Idp thi'm thau (drainage layer), Idp Ipc trung gian (filtration layer), Idp Ipc tang cudng (filtration enhancement) va Idp bao ve ben ngoai (outer shroud) Ong Ipc dang ladi cd Uu diem la dd ben va k h i nang kiem soat c i t cao, song g i i t h i n h cao hdn dng Ipc quan d i y [6] Chde nang chinh cua ladi c h i n cai la b i o ve 6ng l(?c qudn ddy (WWS dng loc dang ludi IPS) va ngan ehan cat, tao nut chan va chdng xoi mdn Hien tUdng xdi mdn g i y ddng chiy chat lUu Hinh 12 Cdu tao liten chdn cat dgng qudn ddy (WWS), dang lilcn (PS) tap trung lUdi, khoang glCfa ludi va gieng OAunil-Sd 12/2014 17 THAM DO - KHAI THAC D A U KHI dng Ifhai thde 4h" Gasilft mandrei 4Vi" Ong chdng 13-3/8" Thiet bIbO trir nhlit Quantum packer Nipple "XW'4«' Quantum paclfer 6ng ching 9-5/8' Hinh 14 Sdn iuong khai thde ddu eua gieng SD- IA, md SuTii^Ben Lutlri chdn cdt Mc l^p (premium) than tran/gl^ng chdng dng cd dp tham cao khi^n ddng chiy co Packer tri/ang nd tdc dp cao Phiu hi/ing cSdng LUdi ehin eit ddc l i p ed g i i t h i n h t h i p , d5 thi^t k^ v i l i p dit Hinh 13 Cdu true hodn thiin giing cd siid{ing iifdi chdn cdt ddc Idp toi mdSuTHSen hPn so vdi lUdl chin c i t chen sdi Vi§c sd dyng ludi chin c i t ddc l^p hoin thifen gl^ng t h i n tran cd t h ^ eung c i p k h i ning d i n tdt hPn CSu trdc hoin thidn gl^ng sd dung ladi chin c i t ddc l i p dUpc thehi&ntrgnHinhlS 2.3.2 Ddi ti/gng mdng ndt ni Packer trUOng nd daoc nghi&n cdu v i sCf dung tai bl^n Bic Na Uy t d n i m 2001, ed t h ^ hoat ddng eic di^u kien mdi tradng nhl§t dd, i p suit cao hoac cd t h ^ ap dung vdi eic gi^ng dOn than, da thin Hi^n nay, packer tradng nddupc sddyng rdng ril tr&n th^gldl v i eho t h i y k h i ning b^n nhl&t va chiu i p suit cao, k h i n i n g l i m kfn tdt, cich ly tdt khoing n g i p nadc v i mu khf Packer truong nd da dupc dng dung t^l nhi^u gl^ng md SUTd Den, SuTCf Ving, C i NgdVang, Rang Ddng K^t q u i eho thcfy gl^ng dupc khai t h i c dn djnh hon, kl^m soit hi^n tupng n g i p nadc tdt q u i trinh gi^ng v i n h i n h khai t h i c Cdng ngh& packer truong nd ngan cich t i n g ng^p nudc d i dUpc i p dung tai nhi^u gl^ng khai t h i c md SUTLT Ben Trong dd, gl^ng SD1A thl^t k^ sCrdyng packer traong nd t^i t h i n t r i n ctia gi^ng nhim dn djnh bd thigt bj Idng g l l n g v i n g i n cich, t^o c^c khoing khai t h i c rlfing bl^t (Hinh 15) Cic t h i l t bj t u i n h o i n dUpc sd dyng t?l khoing giufa packer 6i t h u i n tl$n di4u chinh luu lupng v i ddng/ md khoing khai thic, n i n g eao hi^u q u i khai thic Khi khoing khai t h i c phfa dadI b| ng^p nudc, ehi c i n ddng v i cich ly khoing khai t h i c niy, giing vdn cd t h i t i l p tyc khai t h i c d tSng t r i n Trong q u i trinh khai t h i c g i i n g SD-1 A, h i m lUpng nudc trung binh tri dudi 15%, luu lupng d i u k h i cao d?t trfin 3.000 thung/ ngiy LUu lupng d i u khai t h i c cua g i i n g SD-1 A theo thdi gian dupc Hinh IS Cdu trdc hodn thi(n glfng eda giing SD-1 A, md Su TiBen 12] t h i hl|n t r i n Hinh 14 [3] PETROVIETNAM Kdx luan T i l l i l u tham k h i o Do t i n g Miocene v i Ollgocene taong ddng ve dac Vu Manh Hao va nnk TSng kit ddnh gid cdng tdc diem dja chat nen cSu true hoan thien gieng khai t h i c hodn thien gieng khai thde tqi bi Cdu Long Viin Diu khf it hai tang trdn gidng Tuy nhien, dat d i d vung Vilt Nam 2012 Miocene cd dd rdng cao hdn, d§ bd rdi nen thudng x u l t hi^n c i t qua trinh khai thic Kit q u i thdng ke tai b l Cdu Long eho thay, eic md ed dd rdng > 19% de xay hif n tupng eit x i m nh?p v i o g i l n g khai thac PhUdng p h i p sddyng ladi chin c i t ddc lap giup kiem soat eat xam Bdo cdo hoan thiin giing (Well completion report Completion procedure, end of well report) cOa cdc giing khai thde tgi be Cdu Long Sdn lugng khai thde Bio c i o khai t h i c djnh ky nh^p Cdng ngh^ h o i n thl^n gieng kep dapc Petronas ap (ngay, t h i n g , nam) cua cic gilng md SuTdDen, SuTd dyng t?i mdt sd g i l n g cua md Ruby, Peari de khai thac Ving, Ruby - Peari, Rang Ddng nhieu t i n g sin p h l m dat hieu q u i cao Do dd, can xem xet Nguyen Hai An va nnk Nghiin cdu tai Uu quy dao vd phuong dn hodn thien giing khoan khai thdc/bom ip dp dung cho thdn dau mdng ndt ni mo Bgch Ho Vidn Dau khf Viet Nam 2009 dng dyng edng ngh? cho cac gieng mdi phat trien khai t h i c t^i khu vac cd die diem tuong ddng Cic gilng khai thac tai ddi tUdng mdng ndt ne chu y l u ap dung phUdng phap hoan thien gieng t h i n tran Phuong p h i p kiem soat hien tupng ngap nude tai cic gilng khai thie eCia Vietsovpetro phd bien la dd cau xi m i n g de cich ly khoing ngap nude ben dudi, sau dd tien Bdo edo phdt triin mo (ODP, FDP) cdc md tgi biCdu Long Jonathan Bellarby Well completion design 2009 hanh b i n via d l khai t h i c khoang phia tren Ngoai ra, packer trUPng nd cung dupe mdt sd nha thau i p dung de kiem soat hieu q u i hi^n tapng ngap nudc Bii b i o la k i t q u i nghidn cdu thu dupe td vide thuc hi^n Hpp ddng sd 02/KKT/2010/HD-NCKH Lessons learned from well completion practices in Cuu Long basin Vu Manh Hao, Le Quoc Trung, Le Vu Quan Vietnam Petroleum institute Summary Cuu Long basin is the area where many discoveries of oil and gas have been made and put Into production such as Bach Ho, Rang, Rang Dong, Su Tu Den and Su Tu Vang, etc The geological characteristics in the area is not very complex However, some damages have happened during production, especially the migration of reservoir sand and fines into a wellbore, water breakthrough, and paraffin deposition which can shorten the lifetime of a well, increase operating costs, and decrease well profitability This paper reviews the current application of well completion technologies In the Cuu Long basin and draws lessons for well completion design and execution and technology application In the future Key words: Well completion, Cuu Lorig basin, sand production OAUKrf-SO 12/2014 ... gieng tai be Cdu Long chu yeu i p dung phuong xam nhap v i o gieng C i t xam n h i p tap trung nhieu d khu p h i p hoan thien gieng don Mdt sd gieng d md Ruby, vUe Ddng Bac be Cdu Long noi tram... Den, Rang Ddng, Pearl be Cdu Long, tiet kiem chi phf va hieu qua kilm soit c i t va khai thac cao (Hinh 2) Phuong Hinh So (demo xual hien cdt xdm nhap tai be Cilu Long phap kiem soit c i t bang... Lessons learned from well completion practices in Cuu Long basin Vu Manh Hao, Le Quoc Trung, Le Vu Quan Vietnam Petroleum institute Summary Cuu Long basin is the area where many discoveries of oil