Hpi nghj KHCN 2000 "Nganh Dau khi Viet Nam trifdc them theky 21'''' D A N H GIA KET QUA KHAO SAT CHAN OE GIAN KHOAN TAI MO BACH H(3 KS Dang The Phuang, KS Dao Van Minh, KS Mai Dire Toan Vien NCKH TKDau k[.]
Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' D A N H GIA KET QUA KHAO S A T C H A N OE G I A N KHOAN TAI MO BACH H(3 KS Dang The Phuang, KS Dao Van Minh, KS Mai Dire Toan Vien NCKH- TKDau bien • XNLD Vietsovpetro TOM TAT (:::,dng tac khao sat chan de gian khoan vdi muc dich de nhan va tri chdng chi eua dang kiem qudc te da dugc thue hien tai XNLD Vietsovpetro tunam 1993 tOi Hien da ed 10 gian khoan khai thae ed dinh dang I va gian nhe dang BK va cac gian edng nghe khae da dugc cap chirng ehi phii hgp ciia dang kiem qudc te cho toa bd phan chan de va dam chiu luc Chinh vi vay, cdng tae khao sat chan de phue vu eho edng tae chdng ehi da dug tien hanh hang nam eho phan chan de nam quyen va nam/lan cho phan ngap nude theo quy dinh chung ciia cdng tac dang kiem Bao cao danh gia mdt sd ket qua khao sat chan de cac edng trinh bien thdi gian qua tai mo Bach H GIOl THIEU Hien XNLD Vietsovpetro dang tien hanh khai thae d i u tren viing md Bach Ho va Rdng tai them luc phia Nam Viet Nam Hien ed 10 gian khoan tham dd khai thae cd djnh (dang MSP) la eae gian MSP - i , 3,4, 5, 6, 7, 8, 9,10,11 va RP - va gian nhe khai thac (dang BK) la cac gian BK - , 2, 3, 4, 5, 6, 7, va RC - va cac gian cdng nghe (CTP, WIP, CCP) da ed chdng chi phu hgp eiia dang kiem qudc te va cue Oang kiem Viet Nam cho toan bd phan chan de, rieng hai gian: gian nen khf Idn (CCP) va gian ep via (WIP) da duge c i p chdng ehi ciia dang kiem qudc te eho toan bg gian Theo quy dinh cua cac ed quan dang kiem qudc te, thdi han cd gia trj ciia chdng ehi la nam, nhung de tri chdng ehi hay de chdng ehi ed gia trj, eae hang dang kiem deu quy djnh phin edng trinh nam tren quyen phai tien hanh khao sat hang nam va phin cdng trinh nim dudi nude phai khao sat nam mot lin Ndi dung va khdi lugng edng viee c i n khao sat tuan theo quy djnh ciia dang kiem qudc te Chfnh vi vay, cdng tae khao sat chan de tai md Bach Hd va Rdng da duge tien hanh theo thda thuan vdi ca quan dang kiem qudc te KHAO SAT PHAN KHI QUYEN Cdng tac khao sat phan khf quyen cho t i t ca cac cdng trinh tren da dugc thyc hien day du, diing thdi han theo quy dinh mdi nam mdt lin, dugc tien hanh bdi Ban khao sat edng trinh bien ciia Xi nghiep xay lip edng trinh bien thuge XNLD Vietsovpetro Ndi dung bao gdm cac cdng viee khao sat sau: Khao sat tryc quan tdng the (GVI) Khao sat tryc quan chi tiet Khao sat tryc quan ky ludng Khao sat khuyet tat bang phuang phap khdng pha hiiy Khao sat va do day, bam dinh eiia son phii Oo day edn lai ciia thep Do nghieng, khoang tinh khdng eua gian 389 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' Ket qua khao sat trye quan tdng the toan bg chan de cae gian eho ta thay mdt sd nhan xet chung nhu sau: • Tren t i t ea eae gian khoan deu khdng cd sy bie'n dang, khdng thay ddi kich thudc, dieu dd chung td ring eae gian deu dugc thiet ke tdt, da tinh toan diy dii mgi tac nhan tae ddng len gian, dd khdng phat hien cae bien dang cung nhu khuyet tat khae, eho de'n thdi diem hien chua phat hien thiy cac khuyet tat dang nUt qua tai hay mdi • Cae ket qua khao sat tu trudc nam 1995 deu eho thay phin chan de nam viing nude ban (cao han thiiy trieu), xung quanh vj tri mat ngang 02 ciia MSP (tU -2m cho de'n +3m td 02) va 04 eua BK bj an mdn manh nhat, son phii da bj pha hiiy gan nhu 100% be mat, an mdn khdng deu tao cac Idi Idm tren be mat, Idp ri san pham an mdn phii diy ed chd len den - 5mm Nhung cac ket qua khao sat hien 1998 -1999 da eho thiy hiu het chan de eae gian khoan tai viing da duge son phii chdng an mdn tdt bang loai son phii epoxy hay polyester • Cac ket qua khao sat tU trudc nam 1995 deu cho thiy phin chan de nam viing khf quyen bj an mdn manh, Idp son phii bi pha hiiy tU 50% den 100% Be mat thep bj an mdn khdng deu, Idi Idm, Idp ri san pham cd chd day - 3mm Nhung eae ket qua khao sat hien 1998 -1999 da cho thay hiu het chan de cac gian khoan tai vung da duge son phii chdng an mdn tdt bang loai son phu epoxy hay polyester Khao sat true quan chi tiet cac khuyet tat cho t i t ca cac gian tren eho ta eae ket qua ehinh nhu sau (Bang 2): • Tdng sd khuyet tat phat hien duge tren tit ca eae gian cho den nam 1998 la 390 khuyet tat, dd khuyet tat tim duge nam 1998 chi ed 45 khuyet tat, edn lai 345 khuyet tat la cac khuyet tat cu da phat hien nhung nam trudc Nhd vay sd khuyet tat nam 1998 da tang len 11,3% so vdi nhdng nam trudc • Dang khuyet tat phat hien duge tU trudc den ehii yeu la hu hdng ea hgc (xude, mop Id thiing) chiem 71,28% • Dang khuyet tat nguy hiem nhat la vet ndt cd vet, chiem 1,79% Tat ca cac vet ndt deu khdng phai mdi ma deu va cham ca hgc • Bang thdng ke sd lugng khuyet tat da phat hien tu trudc den nam 1998 eho tit ca eae gian khoan Khao sat tryc quan ky ludng (CVI) cae md'i han sau eao sach gi, son, tien hanh phun eat den sach: Sa 2,5, ket hgp vdi phuang phap kiem tra khdng pha hiiy bang thiet bj MPI, thiet bj sieu am da dugc tien hanh cho tit ea cac gian tren cac nut duge chgn la eae nut chju tai trgng Idn va nhat la cd ben mdi kem nhit theo tinh toan ly thuyet Ket qua khao sat da cho thiy chua phat hien dugc vet ndt tren cae mdf han d nhung nut nguy hiem nhit dd Ket qua do day cdn lai dng thep tren cae gian khoan da eho ta thay an mdn manh tren viing nude bin tU +2m den +7m ke tU mat nude bien trung binh Thiiy trieu d vung Bach Hd cd mdc chenh lech 4,1m giua mUc nude eao nhat va mdc nude thip nhat Ha bam day dac tu myc nude -1,0m (tU myc nude trung binh) trd xudng, dudi Idp son edn tdt va khdng quan sat thay thep an mdn tae dung bao ve ciia he thdng protector Td mdc -1,0m (td mye nude trung binh) trd len den mdc +0,0m bam rdi rac va xuat hien an mdn yeu TU mdc +0,0m den 2,0m an mdn dang ke (an mdn cue bd sau den 1mm) TU muc +2,0m den +4,0m (tu myc nude trung binh), sdn bi pha huy 100% va thep bi an mdn manh nhat (an mdn diem sau den 3mm) tao Id Idi Idm tren be mat thep, Hinh va theo ddi sy bien thien day dng thep khao sat an mdn theo eao td riiye nude tai d'ng chinh eua gian BK - Cac ket qua khao sat sau 390 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' eho thay van cdn vet tich Idi Idm mac dii son phu da dugc sdn sda ehda Viing 4,0m den 7,0m an mdn cd phan giam han nhieu so vdi vung +2,0m den +4,0m So sanh gia tri day thep edn lai duge nam 1996, 1998 va 1999 tren mdt gian cu the, MSP - 9, theo [2] eho ta ket qua sau: Bang 1: Ket qua do day thep cdn lai theo thdi gian nam 1996,1998 va 1999 Do day thiet lo H •'O cn 395 Hoi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' VKlr 5V5 ^1" nl nl^tt** t* M C I HAl 210 ã ã rôla6va to MUI NAl Pn,STrfnN D T T n c K L e t / n j chinh (KM) r % U a ô to DATOTr ã* i * - a o B ^:Ê + 1>.D0 B :aa-fc ã, ^- _2*il_,tuằô ^ • ^ S — * 11.00- > -"-'*• L^^t2 ^4 5, ^ ~~ ã 1.10 *ôJi ãô,iO •«-•• -J — 'ftjiRO ii- ' ' - r-ft* - u bsDt wmH tfai^-n—• TM ^ i * hnin cdoc J i ^ Hinh Theo doi an mon theo cao tren ong chinh 210-17 gian BK-2 t 1.00- T.OO- a * _ , ,.00 CEKTHE LINE D2 DATIIM UNDER SIDE O r o z : ' ( g O M LINE D2J1AT1JM _ [ f ^ M— K D O toiriB S I M (It O Fm in IUivrTur* '•J"" TOT M A l g C qtOWTH * "nue^AU teal* ; Tj\k&ttAkj 5:1 TOP MARINE GROWTH' •- • u built ' ^ Hinh Theo doi an mon theo cao tren ong chi'nh 214-21 gian BK-2 S ^ ^:i% > NifaggBBh»::2gM^ /M ^ ^ ^ 1^^ -'^ - ' • • • ^ • ; > ^ S^C ^ ^ • -AtSiftSn^' i-T^^^SBBHffi^SffwB Hinh Vet nCrt tai vi tri -11.0 m tai gian MSP-4 Hinh Ong can khoan xuyen thung ngang nen Theo dau khae danh dau lan khao sat 1994,1997 Vi chan de tri giai han vet nut gan nhu khong thay ddi tCr nam 1994den nam 1997 396 Hoi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' ChartofMGofMa5-(Bl-1998 @Hanl DSoft • Corrp 100 150 200 250 Height (ran) Hinh Do day bam theo sau tai ong chan de gian MSP, nam 1998 chCrng chi, can thiet phai c6 cac bien phap sau: Can phai tien hanh dgn sach cac vat the la nam tren cac chju luc cue chan de cung nhu a day bien vung D6 cua chan de Cong tac tfnh toan lai thie't ke theo ket qua khao sat can phai thgc hien kjp thdi de gia han dugc chirng chi dung han va gop phan giam thieu khoi lugng cong viec sCra chura, tiet kiem dirge chi phi sira chua (Vl du chi phi cao dudi nude rat tdn kem) TAI LIEU THAM KHAO Dang The Phuong, Dao Van Minh, Le Cong Thuy , Andrew R Banks, Sergey A Klimenko Corrosion inspection for offshore platforms in White Tiger oil field Bao cao Hgi nghj Chau A va Thai Binh Duang ve kiem soat an mon,2-5/11/1999 Banks A.R., Klimenko S.A Letter • report ofsun/ey for MSP - 9, 5/1999, Report of in-vi^atersun/eyMSP-5,1998 Banks A.R., Klimenko S.A Letter - report ofsun/ey for MSP - 5, 5/1999 Bao cao tdng ket de tai NIOKR - V7 nam 1998 cua Phong Khao sat va Chirng chi cong trinh bien, Vien NCKH-TKDau bien 397 ... tau ehd khdng phai mdi (Hinh 4) • Mdt khuyet tat dang d''ng bj xuyen thiing rai cin khoan td tren eao va cin khoan v i n cdn cim tren d''ng la khuyet tat rd ret nhit gay vat rai (Hinh 5) • Tit... sat nam mdt lin lin khao sat dae biet KET LUAN Ket qua khao sat chan de gian khoan thdi gian qua da khang djnh gian khoan dugc thiet ke va lip dat an toan Hien nay, dang kiem qudc te va VIRES... cd chd day - 3mm Nhung eae ket qua khao sat hien 1998 -1999 da cho thay hiu het chan de cac gian khoan tai vung da duge son phii chdng an mdn tdt bang loai son phu epoxy hay polyester Khao sat