Tuyin tap bao cao Hgi nghj KHCN "30 nam Dau khi Vift Nam Cff hgi m6i, thach thuc mdi" 15] VAN DE sty DUNG HOA PHAM TRONG KHAI THAC VA VAN CHUYEN DAU KHI 6 CAC MO CUA XNLD VIETSOVPETRO Tdng Canh Son XN[.]
Tuyin tap bao cao Hgi nghj KHCN "30 nam Dau 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 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 cdc giing khai thde hay 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 khdi hi thdng thiit bi khai thac vd van chuyin ddu a cdc md cua XNLD Vietsovpetro CAC V A N D E TRONG KHAI T H A C VIETSOVPETRO VA VAN CHUYEN D A U XNLD Hang nam, san lugmg dau khai thac tai hai md Bach Hd va Rdng dat khoang hon 10 trieu tan De tri san lugmg 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 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 cang giam, lugmg nude ddng hanh khai thac ciing dau cang tang, nhiet ciia ddng san pham tai mieng gieng ciing giam dang ke so vdi trudc Ngoai ra, viec bom ep nude bien cd 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 suy giam san lugng dau khai thae d cac gieng Trong dd, dau khai thac tai cac md Bach Hd va Rdng ciia XNLD Vietsovpetro la dau nhilu paraffin [I, 2, 3] Nhiet kit tinh paraffin diu dao ddng 152 van de sd dung hoa pham khai thac va van chuyen d mirc 57°C - 59°C, nhiet ddng dae d khoang 32°C - 34°C Nhiet 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 ket tinh paraffin (Bang 1) Bang 1: Cac tinh chat ly hoa ca ban cua dau khai thac tai XNLD Vietsovpetro Thdng sd STT Khdi lugng rieng Nhiet ddng dac Do nhdt, mPa*s Nhiet ket tinh paraffin Ham lugng paraffin Ham lugng nhua asphalten Nhiet ket tinh paraffin Thanh phan phan doan chung cat %V den: Dan vi Gid tri kg/m^ °C d50°C °C %KL %KL 839 32-34 5-7 57-59 23-25 2,2 - 2,7 95 ''C °C V din: lOOV 200''C 300^C 1,5-2,3 16- 17 36,5-38 Cho nen, lang dgng paraffin xuat hien 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 thyc te: nhiet eiia dau tai mieng gieng khai thac d khu vuc phia Bae md Bach Hd thap ban nhieu so vdi nhiet ket tinh paraffin Cdn nhiet cua dau khai thac d cac gieng gaslift chi dao ddng d miic 26°C - 45°C (Bang 2), tire thip hom nhiet 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 10 il Thdng sd ldm viee a mieng gieng Ap suat, (atm) Nhiet do, ("C) 7-13 11 -21 7-18 8-10 5-19 3-10 13-16 2-16 10-13 26-35 42-44 26-38 27-32 28-31 28-31 27-35 28-34 27-31 Sdn lugng (t/ngd) Diu Chat Idng 2-10 65-67 2-60 - 11 19-56 2-12 9-32 -21 7-20 45-55 83-88 8-79 I-ll 28-69 6-13 32-43 -29 8-42 Nhu vay, van de lang dgng paraffin ben 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 Vift Nam: Cff hgi mdi, thach thiic mdi" 153 thdng thu gom, xir ly va van chuyen dau Phan tieh 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 cac mau lang dgng ed the chiem tdi 67%, nhya asphalten khoang - 3%, tap chat co hgc 0,4%o va phan cdn lai la cac hgp chat muoi Bang va Hinh la phan cac phan doan n-paraffin eua paraffin phan chat lang dgng lay tir dng khai thac va ben dudng dng dan dau sir dung lau dai Bang 3: Cac phan doan n-paraffin mau lang dong STT Cdu tir C - C16 Cl7-C2g C28+ Tong Dau thd Hdm luang % KL Paraffin lay tir dng Paraffin lay tir dudng dng da khai thac sir dung lau dai 40,5 45,6 13,9 38,0 41,6 20,4 5,8 69,8 24,4 100 100 100 y.oo ^^^ ' ^ "^ o^^' ^"' o^'^'