PETROVIETNAM NGHIEN CQU D A N H G I A HIEU QUA CUA TO HOP UC CHE AN MON - CHONG DONG CAN TRONG DIEU KIEN MO PHONG DONG CHAY DONG TREN HE THIET Bl FLOWLOOP TS Hoang Linh Lan'.ThS LeThj PhUOng Nhung^ ThS Do Th^nh Trung^ ThS LS Van Cong^ ' Vien Ddu Viet Nam 'Tong cong ty Dung dich khoan va Hoa phdm Ddu khi- dCP Email: lanhl@vpi.pvn.vn T o m tat T6 hop Uc che an mdn - chong ddng can trin casd N-butyl-2-heptadecenyl imidazoline acrylate vd hap chdt cua acid phosphonic duac ddnh gid hieu qud dieu kien mo phdng ddng chdy dgng trin hi thiet bj flowloop phdng thi nghiem Kit qud thd nghiem cho thay hieu qud chdng dn mdn dgt trin 90% vd hiiu qud chdng ddng can dgt tren 87% , TUkhda: L/c chedn mdn, chong ddng can, thiet bi flowloop Mcf dau Sau thdi gian khai thdc ddu t f l phun, de ddm bdo sdn ! Iflpng khai thac can tien hanh cac phflong phap de tri sdp suat via nhfl b o m ep nfldc, gaslift Trong dd, b d m ep nfldc Id phflong phdp h i i u qud dfloc sfl dung rdng rai nhat jcho cde m d dau hi^n nay, song cung lam ndy sinh cac v i n lde ve an m o n va lang d p n g cde mudi vd eP he t h d n g ^thu g o m , vdn chuyen ddu d o mdi chat chfla cde (itdc nhan gdy dn m d n va d d n g can nhfl: CO^, H^S, vt sinh vat, cac ion mudi khoang Cac ldp can ndy thfldng rat cflng va khd loai bd, cd the ldm tdc dfldng dng, thiet bj cdng nghe, gay edc sflcd nghiem trpng nhfl: chay, nd, d nhiem t m i trfldng va can t r d qua trinh trao ddi nhiet Cac can bam khdng ddng n h i t cdn tao sfl khdc biet ve dien the be mat, day nhanh qua trinh dn m o n tren be mat kim loai hoac *dfldi ldp can Vi vay, viec chdng an mdn va loai bd can bdm nham d d m bao sfl hoat d6ng lien tue cfla he t h d n g dfldng dng, thiet bj la van de rat quan trpng vd chiem m d t phan chi p h i kha Idn cdng nghiep dau Sfl dung edc chat flc che chdng an m o n va chdng ddng cdn Id gidi phap hC^j hieu dUoc dp d u n g rdng rai cdng nghiep [1 - 5] In ' ' ' f Viee ddnh gia hieu qud cfla cac chat flc che jphdng t h i nghiem t h f l d n g dflpc thfle hien dieu kien (Jtinh vd ^ e u kien m d phdng d o n g chdy dpng Tuy nhien, nhien d W i t Nam, t h f l nghiem danh gid an mon va ddng (can chu ydu thfle hien dieu kien tinh tat nhiet d o lithfldng, dp suat t h f l d n g vd dieu kien nhiet d p cao, dp suat ycao Viec nghien cflu edc qud trinh an m d n vd ddng can i r o n g didu kien ddng chdy d p n g phdng t h i nghiem hau nhfl It dflpc thfle hien d o qua trinh m phdng gap nhieu khd khan Do vdy, he t h d n g thiet bj flowloop dflOc chd tao nham m d phdng didu kien d o n g chay ddng, ddnh gia qua trinh an mdn va dong can xdy dudng dng ed ddng chdy se g d p phan nghien cflli, khao sat cde qud trinh an mdn, ddng can va danh gid hieu qud bdo ve cfla cac t d hop flc ehe an m d n - chdng ddng can dieu kien ndy Thuc nghiem 2.1 Thdnh phdn to hap Uc chedn mon - chdng dong can Td hop flc che an m d n - chdng ddng can (td hpp) M7 va M9 dflpc che tao vdi phan g d m pha hoat tinh (dflOc tao thdnh t f l N-butyi-2-heptadeceny! imidazoline acrylate va EDTMPS theo ty le 1:1 va 1:2 tflOng flng) vd phu gia (NPI 0, isopropanol, acid citric) [6] 2.2 Che tgo he thiet bi flowloop phong thi nghiem He t h d n g thiet bi flowloop g d m cac bp phan cP bdn sau: Dfldng dng ehiu d\icic dp s u i t va nhiet d d ; thiet bt dieu khien tdc d p ddng chdy; thiet bj ghi nhan ket qud d o dn m d n (corrosion metter); be chfla chat Idng t h f l nghiem, bom chiu an m o n (Hinh 1) Bam chat ifl đ ^ bôSi % j ??: NOi thCr nghie Du'cmg bcrm Hinh I So nguyen ly he thiet bi Hawlaop [7] HOA - CHE BIEN D A U KHI Mdi trfldng thfl nghiem: nfldc tadlay tfl gian cdng nghe Lien doanh Viet - Ng; "Vietsovpetro"; Toe dp dong chay: 0,1 m/s Tien hanh thfl nghiem ddnh gia hieu qua ciia td hpp nhfl sau: Dong 10 lit nfldc tach tfl gian cdng ngfie Vietsovpetro vdo he thdng den mfle cho phep, day chat binh; Kiem tra cac dau ndi di^n cfle va ndi vac he thdng do; Hinh Hi thiet bi flowloop chi too phong thi nghiem Md van eho hon hpp mdi chat chay Tren co sd so nguyen ly eua thiet bj flowloop (Hinh 1), he thdng thiet bt che tao phong thi nghiem gdm: Bom chiu hoa ehat, ed tdc dp ddng chay tfl - m Vgid; Be chfla mdi chat dung tich - lit; Binh an mdn, dung tich 3-5 lit; - Dfldng dng dan Iflu chat chiu nhiet, chju dp; Cac van dieu khien tde dd ddng chay, chiu hda chat, chju nhiet, ehiu dp; Ddng hd Iflu Iflpng, chiu hoa chat, chju nhiet, chiu ap; Nhi§t ke, daudopH; Thiet bi dieu khien nhiet dp Dien cfle an mdn dflpc gan vao dfldng dng bang cac gioang dam bao kin va chiu dflOc ap Iflc chay cua dong nfldc, nhiet dp M6i ehat (nUdc tach va td hop flc che an mon - chdng ddng can vdt cde ndng dp thCf nghiem) chfla be chfla dflpc bpm cap den binh an mdn va be chfla chat idng tuan hoan vdi Iflu Iflpng cd djnh.Tde dong chay eua mdi chat dflpc dieu khien thdng qua van dieu khien Iflu lUpng va dUpe bang ddng hd lUu lUOng ddng chay Tren bd phan d\jac lap dien cfle: dien cUc lam viec, dien cfle ddi va dien cfle so sanh nham xac dinh tde an mdn eua ddng mot ehat va hieu qua chong an mon cua td hop Nfldc tach dflpc lay tfl day binh an mon nham xac dinh ham Iflpng Ca^+ mdi ehat va hieu qua chdng dong can cua td hop Sau khdi bp phan do, mdi chit dflpc bOm tuan hoan trd lai be chfla, tai day, tiep tuc qud trinh bom Iflu chat trd lai binh Qua trinh tuan hoan mdi chat dupc dien lien tuc, cho den thfl nghiem ket thuc 2.3 Ddnh gid hieu qud cua to hop Uc chedn mon - chong ddng can Dieu kien thUc nghiem: Dien cfle lam viec: thep ASTM AI 06; 34 DSUKHI-S0 2/2016 he thdng vdi Iflu Iflpng phu hpp va tri lify Iflpng dn dmh it nhat 30 phut; Bom tflng td hpp flc ehe theo cac ndng dd can thfl nghiem (05ppm, lOppm, ISppm, 20ppm, 25ppm) Thdi gian de tien hanh mdt phep khoang 720 phut (eho den tdc dd an mdn va hair Iflpng Ca^+ nfldc tdch khdng ddi) Trorig khodng thdi gian nay, nfldc tach dflpc bom tuan hoan he thdng, toe dp an mdn va hair Iflong Ca^"^ nfldc tdch tai binh duoc xac djnh lien tue vdi tan suat 30 phut/Ian eho den kiii gia tri tdc dp an mdn va ham IflOng Ca^+ nfldc tach khong ddi 2.3.1 Ddnh gid hieu qud chong dn mon Hieu qud chdng an mdn cfla cac td hpp lie ehe d cae nong khac dflOc danh gia thdng qua phflOng phdp dien trd phdn cfle Q^ trinh chuan bj mau va tien hanh thi nghiem tfieS tieu ehuan ASTM G170-01a [8] Qud trinh thd nghiem dflpc thiJe hien tren he thiet bj flowloop ndi vdi thiet bi dien hda PARSTAT 2273.Trorg phflong phap nay, dien thd quet dflpc dp dattrei) mau kim loai xung quanh gid trj dien the an tnon (dE - E - Ecorr).Tflede dfldng cong phan cUcthu dflpc phan mem tich hpp tren thiet bi PARSTfll 2273 se xac dmh dien trd phan cfle va tinh toSn tdc dp an mdn trfldng hop ed va k h d n ^ dung td hop flc che an mon - chdng ddng can Bo tdc dp an mdn bang thiet bi dien hdavfi tan suit 30 phut/Ian cho den tdc dp an ma' dat gid tri khdng ddi PETROVIETNAM Hieu qud ehdng dn mdn cfla edc td hpp flc ehe dn mdn Hieu qua chdng dong can (%) = - chdng dong can dUdc xac djnh theo cdng thfle sau: Hieu qud chong an mdn (%)= V^- V x 100% c,-c^ 100% (2) Trong dd: (1) C\ Ham IflOng Ca^* mau nfldc tdch sau Trong do: t h f l nghiem (cd sfl dung hda pham flc ehe), mg/l; V^: Tdc an mdn thep khdng sfl dung flc che, mm/nam; C^: Ham Iflpng Ca'"" mau nfldc tdch sau t h f l nghiem (khdng sfl dung hda pham flc che), mg/l; t V: Tdc dd an mon thep sfl dung flc ehe, m m / nam C^: Ham Iflpng Ca'"" mau nfldc tach trfldc t h f l nghiem, mg/l II 2.3.2 Ddnh gid hieu qua chong dong can K^t qud va thdo luan Theo mpt sd cong trinh da cdng bd [9 - 12], qud ( trinh khai thdc dau sfl dung nUde bien lam nfldc bom ep 3.7 Anh hudng cua nong hda phdm den hieu qud chong dn mon cua tdhop Uc chedn mdn - chong dong can ii nen cde mudi sa Idng chCi yeu la CaCO^ va CaSO^ Do vay, nghien cflu nay, hieu qua chdng ddng cdn dflOe xdc De Ifla chon ndng dp sfl dung tdt flu, t d hpp flc che an j, dinh thdng qua hdm IflOng Ca^"" nfldc tach trfldc vd mdn - chdng ddng can M7 va M9 dflpc t h f l nghiem danh sau sfl dung to hpp flc che an mdn - chdng ddng can gia hieu qud flc che an mdn dieu kien md phdng Thfl nghiem danh gid hieu qua chdng ddng can dflOe tien ddng chdy dpng d cde ndng dp t f l - 25ppm (Bang va hanh theo tieu c h u i n NACE 0374 - 2007 [9] Hinh 3) ll Ket qua t h f l nghiem dieu kien md phdng ddng Nfldc tdch dflpc lay t f l binh vdi tan s u i t gid/lan va dflpc xdc dinh hdm Iflpng Ca^* theo tieu ehuan TCVN chdy ddng eho t h i y , d ndng dp 20ppm, hieu qud ehdng dn mon cfla cac td hpp flc che M7 va M9 deu tang len rd ret > _ 6198 -1996 Hieu qua chdng dong can Ca^+dUpe tfnh theo 90% (lan Iflcft Id 90,50% va 90,15%) Khi tang ndng dd len cdng thfle sau [10]: ;u qud chdng dn mon j Bdng I Anh hudng cua ndng to hop de chedn mdn - chdng ddng TdhgpCtcchefAJ Nong (ppm) Khong sfldung chat flc che Toe an mon (mm/nam) To hopflcche M9 Hieu qud chong 2,183 Tocdoanmbn (mm/nam) Hi^u qud chong 2,183 0,836 _33,18 1,538 61,86 0,856 32,66 60,81 0,238 90,50 91,07 0,217 0,204 90,15 90,63 f 1,51 E I 1.0 ": : : : ^»^™*^— Nong 36 Lfcch^, ppm • ^ ^ " ^ — NSngdo iJcch^, ppm Hinh Anh hudng cua nong to hop Uc che den tdc dd dn mon (a) vd hieu qud de chedn mon (bj DAUKHf-Sd 2/2016 35 HOA - CHg BIEN DAU KHI tren 20ppm, hieu qud chdng an mdn cua to hpp flc che 4) cho thay, ham Iflpng Ca^' dung djch sauithu deu tang khdng dang ke Theo yeu cau nganh nghidm d dieu ki&n md phdng ddng chdy dpng cao hon cdng nghiep dau khi, hieu qua chdng an mdn > 90%, so vdi ddieu kien tinh vdi ham Iflpng Ca^* dung djdi do, ndng dd cua cac td hdp flc ehe M7 va M9 dflpc lUa chfla td hop flc che M7 va M9 ndng dd 15ppm lan Iflpt la chpn la 20ppm 2.153,26mg/l va 2.184,89mg/l [6] Dd la ddng chdy tdt dp cao da cudn di edc mam tinh the dan den khd nang tao 3.2 Anh hudng cua nong hda phdm dd'n hiiu qud chong ddng can cua to hop Uc che dn mdn - chdng ddng can can t h i p hon, do, ndng dd ion Ca^"^ dung djch cao hon Khi sfl dung cac td hpp flc che M7 vd M9, ham Iflpng Ca'+ dung dieh tdng eao hon so vdi trudng Ket qud thfl nghiem hieu qua chdng ddng can Ca^* hpp khdng sfl dung to hpp flc che, chflng td Iflong can dieu kien md phdng ddng chdy ddng (Bdng 2, Hinh bdm tren dfldng dng, thiet bj gidm Hieu qud chong Bing Anh hudng eiia ndng to hop dc chednin - chdng ddng can den hiiu qud chdng ddng can Ham Ifltfng Nong flc che (ppm) T htfp i?c che M ccheM7 Ca^"^ trfldc t h i nghiem (mg/l) Ham Ifldng Ca'" sau t h i nghiem 2.422 1.847,55 422 2.200,57 61.45 2.211,04 63,28 422 2.226,58 65.98 2.232,57 67,02 422 2.336,58 85,13 351,11 87,66 422 2.339,47 85,63 2.352,89 87,97 2.422 2.342,56 86,17 2.354,12 88,18 Khong sCr d u n g flc che a MliuM9 (mg/l) Hieu qua H a m ii/Ong Ca'" Hieu qud chdng dong can sau t h i n g h i e m (mg^) _ chdng dong can (%) aMluM? It II II I II II I i 1! i II II ii [1 Nong i/c che, ppm Hinh5.Hinhthdihoecuamducdnsauquatrinhthdnghiemliongmldetdch-Kh6ngsddungtohapucchelaJ:SddungtohapueeheM7ridiigd6!5ppm(b Sddung to hap de cheM9 nong ISppm (e) I 36 (%) 1.847,55 PETROVIETNAM Bing 3, Ket qud phdn tich thdnh phan nguyin tdsdn phdn Thanh phan nguyen to (% khoi Iflcmg) ° Na Mg AI Si Cl K Ca Tdng Trong mlu can tfldung dich khong sfl dung td hcfp flc che 8,85 5,09 0,24 0,60 0,43 62,82 2,01 19,97 100,00 Trong mau can tCrdung dkh CO sfl dung to hoip flc che M7 nong ISppm 8,97 10,92 o,n 0,92 N/A 69,22 3,97 5,89 100,00 Trong mlu can tfl dung djch CO sfl dung to hcfp flc ch^ i 8,83 11,57 0,04 1,32 N/A 68,81 3,86 5,57 100,00 ddng can Ca^+cua cde td hpp tang eao ro ret vdi ndng dpng cho mdi trfldng nfldc tdch tfl gian cdng nghe cija tfl ISppm trd len Do dd, ndng dd cua eac td hpp M7 va Vietsovpetro la 20ppm M9 dflOe It/a chpn thfl nghiem danh gia hieu qud chdng ddng can la 15ppm cung ndng dp thfl nghiem, hieu qua chdng ddng can Ca^" eija td hpp flc ehe M9 tang eao hPn nhieu so vdi M7 Mau eantfldung dieh sauthflnghtem hieu qua chdng Ket luan He thiet bi flow/loop da dflpc che tao nham nghien cflu, khdo sat cac qud trinh an mdn, ddng can he thdng thu gom va van chuyen dau khiva danh gia hieu ddng can tren he thiet bj flow/loop dflpc phan tieh hinh qua cfla cac id hpp flc ehe an mdn - chdng dong can thai hpe be mat {dnh SEM) va phan tich phan (EDX) dieu kien ddng chay dpng Ket qud nhfl sau- Khi sfl dung td hop flc che an mdn - chdng ddng can M9 d ndng 20ppm dieu kien md phdng dieu kien dong chdy ddng, mdi trfldng thfl nghiem la nfldc tach tfl gian cdng nghe cua Vietsovpetro, hieu qua chdng an mdn dat 90,15% va hieu qua chdng ddng can dat 87,97% Hinh dnh hinh thai hpc be mat mau can (Hinh 5) cho thiy, khdng sfl dyng td hpp flc che, m l u can hinh dung dieh d dang cac tinh the ed hinh khdi vudng, kieh thfldc khd Idn, bam dinh chac Khi cd mat td hop flc che, cac tinh the can thay ddi ca ve hinh thai eung nhfl kich thfldc Tinh the mau can tdn tai d dang bdt co kieh thfldc nhd, de bj phan tdn ddng chay Dieu cho Xh&y, qud trinh phat trien cCia ttnh the, cac phan tfl chat flc ehe da h i p phu tren be mat tinh the, phd vdcau true va lam gidm dd bdm dinh cfla tinh the Ket qud phan tich thdnh phin mau can (Bang 3) cho thay, khd nang tao phflc eija to hpp flc che vdi ion Ca^+ dd lam gidm ddng ke ham Iflpng nguyen td Ca mau can tfl dung djch ed sfl dung td hpp flc che ndng dp 15ppm so vdi m l u dung djch khong sfl dung td hop flc che Qua trinh thfl nghiem ddnh gid hieu qua cua to hpp flc ehe dieu kien md phdng ddng chdy dpng tren he thiet bj flowloop cho thay ndng dp ehat flc che cfla mau M7 va M9 sfl dung dat yeu cau la 20ppm Tuy nhien, Tai lieu tham khao I Defang Zeng, Huan Van 5fudy on an eco-friendly corrosion and scale inhibitor in simulated cooling water American Journal of Engineering Research (AJER) 2013; 2(5):p.39-43 Lekan Taofeek Popoola, Alhaji Shehu Grema, Ganiyu Kayode Latinwo, Babagana Gutti, Adebori Saheed Balogun Corrosion problems dunng oil and gas production and its mitigation International Journal of Industrial Chemistry 2013 Margrethe Nergaard, Chriss Grimholt An introduction to scaling causes, problems and solutions 2010 sfl dung mau M9 hieu qua ehdng an mdn gan nhfl khdng thay ddi nhung hieu qua chdng ddng can thi Eric Greyson, Joseph Manna, Somil Chandrakant tang rd r§t so vdi sfl dung m l u M7 Mau td hpp flc Mehta Scale and corrosion inhibitors for high ehe an mdn - chdng ddng can dflpc Ifla chpn la mau M9 and pressure conditions Patent CA2709033 C 2013 vdi ndng sfl dung tdt flu dieu ki^n ddng chay temperature Gary Woodward, Graham Otter, Keith Davis, DAU KHI - 56 37 HOA - CHE BIEN D A U KHI Robert Talbot Scale and corrosion inhibitors Patent US20030141486A1.2003 Hoang Linh Lan, Phan Cdng Thanh, Pham Vu Dung, Le Thj Phflpng Nhung, Pham Thi Hfldng, Le Thj Hdng Giang Ddnh gid hieu qua cua to hcjp dc che dn mon - chong dong can cho he thong dUdng ong ddn ddu Tap chi Dau 2015; 5: trang 42 - 48 / Richard Thorn, Geir Anton Johansen, Eding A.Hammer Three-phase flow measurement in the offshore oil industry - Is there a place for process tomography 1'' Wodd Congress on Industrial Process Tomography, Buxton, Greater Manchester 14-17 April, 1999 ASTM International Standard guide for evaluating and qualifying oilfield and refinery corrosion inhibitors in the laboratory ASTM Gl 70-01 a of scale inhibitors to prevent the precipitation of calcium sulfate and calcium carbonate from solution (for oil and gas production systems) NACE 0374-2007 10 Defang Zeng, Huan Yan Experimental study on o new corrosion and scale inhibitor Journal of Environmental Protection 2013; 4(7): p 671 - 675 11 Dd Thdnh Trung, Nguyen Xudn Trfldng, Hoang Linh Lan, Phan Cdng Thanh Nghien cdu dng dung he hoa phdm dc chedn mdn tren cO sd imidazolin dung cho bam ^p nUdc cdng nghiep khai thdc ddu Tap chi Dau kbi 2012; 3: trang 28-34 12 Nguyen PhUOng Tung va nnk Xdy dUng cfing nghe sdn xudt cac hda phdm chong sa Idng muoi via vd cac thiet bi khai thdc ddu thd Vien Khoa hpc Vat lieu Cfng dung.2005 The National Association of Corrosion Engineers (NACE) Laboratory screening tests to determine the ability Effect of corrosion and scale inhibitor under flow simulation in laboratory Hoang Linh Lan', LeThi Phuong Nhung' Do Thanh Trung^, Le Van Cong' 'Vietnam Petroleum Institute ^Drilling Mud Corporation Email: lanhl@vpi.pvn.vn Summary In this study, the effect of corrosion and scale inhibitor based on N-butyl-2-heptadecenyl imidazoline acrylate and phosphonic acid compounds was evaluated under the condition of flow simulation in laboratory The results Indicated that the corrosion inhibition efficiency could reach over 90% and scale inhibition efficiency over 87% Key words: Corrosion inhibitor, scale inhibitor, flow loop I 38 DitUKHI-sd2/2016 ... cfle va ndi vac he thdng do; Hinh Hi thiet bi flowloop chi too phong thi nghiem Md van eho hon hpp mdi chat chay Tren co sd so nguyen ly eua thiet bj flowloop (Hinh 1), he thdng thiet bt che tao... cdng thfle sau: Hieu qud chong an mdn (%)= V^- V x 100% c,-c^ 100% (2) Trong dd: (1) C\ Ham IflOng Ca^* mau nfldc tdch sau Trong do: t h f l nghiem (cd sfl dung hda pham flc ehe), mg/l; V^: Tdc... (% khoi Iflcmg) ° Na Mg AI Si Cl K Ca Tdng Trong mlu can tfldung dich khong sfl dung td hcfp flc che 8,85 5,09 0,24 0,60 0,43 62,82 2,01 19,97 100,00 Trong mau can tCrdung dkh CO sfl dung to hoip