l u y j n tap bao cao Hdi nghj KHCN "30 nam D^u khi Viet Nam Cff hdi mdi, thach thuc mdi" 955 DANH GIA MOI LIEN HE TU^OTVG TAG G I L T A CAC GIENG KHOAN TRONG QUA TRINH KHAI THAC VIA DAU MONG M O BACH[.]
l u y j n tap bao cao Hdi nghj KHCN "30 nam D^u Viet Nam: Cff hdi mdi, thach thuc mdi" 955 D A N H GIA MOI LIEN HE TU^OTVG TAG G I L T A C A C GIENG K H O A N T R O N G QUA TRINH KHAI T H A C VIA D A U M O N G M O B A C H H O B A N G PHAN TICH T U O N G Q U A N H A N G S P E A R M A N Phung Dinh Thuc, Mai Van Du Cong ty Thdm dd- Khai thde Ddu TOM TAT Trong bdo cdo ndy, cdc tdc gid trinh bdy viec ddnh gid mdi liin he tuomg tdc giua cdc giing khoan via ddu mdng md Bgch Hd qud trinh khai thac bdng phdn tich tuong quan hgng Spearman ddi v&i cdc thdng sd di tiip can nhu lim lugng ddu, nu&c, nu&c bom ep Kit qud nghien cuv cho thdy phdn tich tucmg quan hgng Spearman rdt huti dung cho viec phdn tich vd ddnh gid nhanh cdc ddc diim cua qud trinh khai thde via nhu mdi liin hi thuy luc giira cdc giing khoan, hu&ng ddng chdy thuy luc via ddu, nhdn biit cdc giing bom ip theo muc liin hi thuy luc v&i cdc giing khai thac hay nhdn biit cdc giing bom ip la thu phgm chinh gdy ngap nu&c cdc giing khai thde di dua de xudt diiu chinh chi tiiu khai thac vd bom ep nu&c kip th&i ddi v&i tiing giai dogn khdc cua qud trinh khai thac via ddu mdng md Bgch Hd GI61 THIEU Do nhieu nguyen nhan kbac nhau, qua trinh khai thac via dau mong mo Bach H6 tu nam 1988 den kh6ng phai liic nao cung co the tien hanh nhung nghien eiiu thuc dia de xac dinh m6i lien he thuy lire giua cac gieng khoan nhu nghien eiiu giao thoa, bom chat chi thi, v.v Tuy nhien, de giai quyet nhiing nhiem vu kiem tra va dieu ehinh qua trinh khai thac via dau thi lu6n can nhiing th6ng tin kip thai va dang tin cay ve dong thai cua dong chay dau nuoc via, cung nhu ve m6i lien he thuy lire giua cac gieng khoan qua trinh khai thac Chinh vi vay, viec iing dung cac phuang phap phan tich cac thong so khai thac cac gieng khoan nhu luu lugng dau, nuoc va nuoc bom ep de co dugc nhung thong tin tren mot each nhanh chong thuan tien co y nghia v6 ciing quan de danh gia trang thai khai thac va dua bien phap dieu ehinh nham nang cao hieu qua khai thac via dau Voi muc dich tren, cac tac gia da ap dung phuong phap phan tich tuong quan hang Spearman d6i voi cac th6ng so lam viec cua cac gieng khoan de danh gia m6i lien he thuy lire giua chiing qua trinh khai thac Ket qua nghien ciiu dugc trinh bay bao cao DANH GIA MOI LIEN HE T U O N G TAC GICTA CAC GIENG KHOAN MONG MO BACH HO TRONG QUA TRINH KHAI THAC THEO HE SO TU-ONG QUAN HANG SPEARMAN Cae tac gia da tiln hanh tinh toan he s l tuang quan hang Spearman cho toan bo cac cap gieng khai thac va bom ep nuac theo chi tieu luu lugng diu, nuoc va nuoc bom ep theo cac thai ky kbac ciia qua trinh khai thac via diu mong mo Bach 956 Danh gia mdi lign he tuong tac giua cac gieng khoan qua trinh khai thac via dau H6 De nang cao tin cay eua cac th6ng tin nhan dugc thi chi c6 cac he s6 tuong quan hang Spearman dat chuan ve miic dam bao tin cay theo kiem dinh Student moi dugc dua vao phan tieh de danh gia moi lien he tuong tac giua cac gieng khoan NhQng he s6 kh6ng dat chuan theo kiem dinh Student chi dugc dung de tham khao can thiet Ket qua phan tich cho thay gia tri cua he s6 tuong quan giua cac gieng khoan mong mo Bach H6 thay d6i manh theo thai gian, dac biet la sau bat dau bom ep nuoc de tri ap suat via d giai doan bat dau bom ep nuoc (tu thang 6-1993 den thang 5-1995), ta thay eo m6i lien he cao va d6ng dieu duong giQa cac gieng khai thac theo hau het cac huong ciia via dau Dieu hoan toan tuong d6ng voi ket qua nghien ciiu thuy dong lire co sir phan bo d6ng deu eua ap suat via ben than dau theo thoi gian va khong gian Trong cung mot thai gian thi ap suat via a cac gieng khae va chieu sau khae sau quy d6i ve cung mot chieu sau deu co gia tri tuong duong nhau, mac du be day cua than dau len den hon 1000m va via c6 tinh bat d6ng nhat eao ve cac tinh chat tham chua Giai doan tii thang 6-1995 den thang 12-1996 dugc dac trung boi sir suy giam manh gia tri he s6 tuong quan giQa cac gieng khoan ciia khoi trung tam (Bang 1) Giai doan co sir gia tang manh s6 lugng cac gieng bom ep va khai thac, cung nhu sir xuat hien ciia cac gieng ngap nuac dau tien Ro rang la, viec gia tang san lugng khai thac dau va bom ep nuac a giai doan da tac dong den viec phan b6 lai ciing nhu lam thay d6i huong dong chay thuy lire via va dong nuoc tu cac gieng bom ep chii yeu di theo eae kenh dan lan ciia he th6ng mit ne, gay can tra sir luu th6ng thiiy lire giQa cac gieng, lam giam m6i lien he giua cac gieng a mgt miic nhat dinh Chinh vi nguyen nhan nay, gia tri he s6 tuong quan giua cac gilng khoan co tinh bat d6ng nhat cao theo cac huong khae (Hinh 1) va mli lien he tuong quan tot thuang co huang trung voi buong cua cac he th6ng niit ne va diit gay ehinh mong nhu huong D6ng Bae - Tay Nam, Tay B I C - D6ng Nam hoae a kinh tuyin Co the lay vi du gieng bom ep T04 de minh chung Sau dua gilng vao bom ep mot thai gian thi tat ca nhQng gilng khai thac bao quanh gilng T04, ehi co gieng T02 la bat dau bi ngap nuoc manh Viec nghien eiiu bing bom chit chi thi cung chi xac dinh dugc viee van dong voi tic cao ciia cac chit ehi thi tu gilng T04 din moi gieng T02 ma thoi Tu giai doan bit diu dua gilng T04 vao bom ep din thoi dilm truoc gilng T02 bi ngap nuoc, giua hai gilng t i n tai mli lien he tuong quan am (-0,68) The nhung vao thai dilm gilng T02 bit diu bi ngap nuoc tu gilng T04 thi gia tri lien he tuong quan ciia chiing da tang manh len din +0,96 Trong do, gia tri lien he tuong quan giua gilng bom ep T04 voi nhung gilng khai thae xung quanh khae vin giu miic thap va it biin dii theo thai gian Nhu vay la co sir tuong d6ng giQa ket qua phan tich mli lien he tuong tac giua eae gilng khoan via diu mong mo Bach H6 bang phuang phap phan tieh tuong quan hang Spearman voi kit qua nghien ciiu ciia cac phuang phap thuc dia kbac da dugc ap dung 957 Tuygn tap bao cao Hdi nghi KHCN "30 nam D^u Viet Nam: Cff hdi mdi, thdch thuc mdi" Bang 1: He so tuong quan mot so gieng mong mo Bach Ho cac giai doan: (1) 6/1993 ^5/1995; (2) 6/1995 - 12/1996; (3) 1/1997 - 9/1999; 4) 10/1999 ^ 6/2001 GK 805* B33* B55* BTI** Giar doan 805 4 -0.6 -0.17 -0.49 0.19 -0.6 -0.38 0.23 -0.54 -0.57 -0.08 BOI** 817** 2+* 802** B03** 4 4 822** 807** B08** B20** 4 4 B33 B55 BTI BOI B17 B02 803 822 807 808 820 -0.6 -0.17 -0.49 0.19 -0.6 -0.38 0.23 -0.54 -0.15 -0.04 -0.57 -0.08 0.43 0.04 0.6 0.46 -0,41 -0.55 -0.15 0.18 -0.76 0.12 0.67 -0,62 -0,15 0,34 0.86 0.67 0.43 -0.29 -0.56 0.26 0.14 -0.06 0.97 0.24 -0.21 0.59 0.28 0.62 0.74 -0.5 -0.36 -0.59 -0.37 -0.54 -0.14 0.59 -0.72 0.97 0.47 -0.27 0.03 0,48 0.6 -0.04 0.3 0.07 -0.18 0.3 0.63 0.13 0,37 0,3 -0,22 0,43 0,21 0,65 0,32 -0,54 0.45 0.29 -0.02 -0.97 0.26 -0.18 0.61 -0.97 -0,29 -0,24 0.34 -0.47 0.15 0.7 0.09 0,67 -0,32 -0.15 0.1 -0.01 -0,56 0.28 -0.36 -0.1 0.56 0.6 0.65 -0.66 0.11 0.97 0.27 0.14 0.64 0.88 0.09 0.61 0.22 0.76 0.22 -0.13 0.45 0.8 -0.55 0.84 -0.54 0.64 -0.57 0.61 0.54 0.82 -0.59 0.1 0.44 0.62 -0.17 -0.25 0.19 0.79 -0.14 0.63 0.3 0.8 0.69 -0.15 0.04 0.03 0.6 0.46 0.43 -0.41 0.09 -0.55 -0.15 0.18 0.09 -0.76 0.12 0.67 0.86 -0.62 -0.15 0.34 0.36 0.67 -0.18 0.05 0.36 0.67 0.43 -0.29 0.05 0.3 0.63 0.13 0.37 0.6 -0.04 -0.18 0.05 0.36 0,67 0,21 -0.05 0.09 0.74 -0.62 0.05 0.67 -0.48 0.46 -0,53 0,66 0,44 -0.56 0.5 0.47 0.3 0.09 0.67 0.21 -0.05 0.09 0.67 -0.48 0.46 -0.53 0,3 -0.22 0.43 0.21 -0.56 -0.06 0.04 -0.01 -0.54 0.45 0.29 0.38 -0.97 0.26 -0.18 0.31 -0.97 -0,29 -0.24 -0.02 -0.56 0.26 0.14 0.61 0.97 0.24 -0.21 0.34 0.97 -0.33 0,23 -0.06 0.55 0,44 0.26 0.57 -0,24 0.59 0.28 0.62 0.74 -0.47 0.15 0.7 0.53 0.04 -0.28 0.36 -0.36 -0.59 -0.37 - -0.68 -0,28 0,44 0.16 0.65 -0.66 0.61 -0.5 0.32 0.05 0.39 -0,48 0,47 0,81 0.76 0,76 0.22 -0.13 0.8 -0.55 0.84 -0.5 -0.54 -0.14 0.59 -0.72 0.28 0.97 0.47 -0.27 0.11 0.22 0.45 -0.54 0.88 0.09 -0.25 0.19 0.79 -0.14 -0.18 -0.32 -0.15 0.1 -0,03 0,37 -0,64 -0.36 -0.1 0.56 0.6 0.97 0.27 0.14 0.64 -0.62 0.2 0.74 -0.62 -0.62 0.2 0.66 0.44 0.36 0.07 0.65 0.32 -0.02 0.16 0.65 0.16 -0.23 0.34 0.43 0,13 -0,53 0.37 0.79 -0.22 -0.63 0,36 0,07 0,89 -0,3 0.11 0,11 0.89 -0.3 0.11 -0,02 0.16 0.81 -O.I 0.39 0,42 0,86 0,86 0.74 -0.24 0.11 0.81 -0.1 0.39 0.42 0.82 0.21 0.3 -0,24 0,86 0,71 0,18 0.84 0.77 0.42 0.61 0,56 0.12 0.83 -0.13 0.56 0.03 0.22 0.53 0.56 -0.08 0.34 0.68 0.88 0.48 0.74 -0.17 0.91 0,43 0,14 0.65 0.86 0.43 0.28 0.65 0,86 0,86 0,74 0.5 0.47 0.38 -0.56 -0.06 0.04 0.31 0.65 0.16 0.43 0.13 0.55 0.97 -0.33 -0.23 0.44 0.79 -0.22 -0.23 0.34 0.82 0.21 0.3 0.61 0.86 0.71 0.18 -0.13 0.84 0,77 0,42 -0.53 0.37 0.56 0.12 0.83 0.68 0.56 0.03 0.22 -0.17 0.56 -0.08 0.34 -0.63 0.26 0.88 0.48 0.74 0.57 0.91 0.43 0.14 -0.24 0,53 0.65 0.64 0.09 0.32 0.65 0.9 0.62 0.87 0.9 0.52 0.43 0.82 0,64 0,09 0,32 0.87 0.9 0.62 0.86 0.43 0.28 0.96 0.52 0.43 0.82 -0.03 0.37 -0.64 -0.68 -0.18 0.44 0.16 -0.5 0.32 0.05 0.39 -0.48 0.47 0.81 0.76 -0.43 0.41 0.63 0.04 -0.46 0.47 0.22 0.2 -0.26 0.19 0.16 0.17 -0.6 0.57 -0.05 0.08 0,9 0.96 -0,46 0,47 0.22 0.2 -0.26 0.19 0.16 0.17 -0.6 0.57 -0.05 0.08 0.61 0.82 -0,59 0,1 0.62 -0.17 -0.03 0.81 -0.17 -0.18 0,54 0,44 0.55 0,9 0,23 0,7 0,81 0,18 0.63 0.8 0.69 0.51 0.52 0,23 0.1 0.74 0.3 -0,56 0,46 0.35 0.4 -0.43 0.41 0.63 0.04 0.64 -0,57 0.53 0.04 -0.28 0.36 0.89 -0.16 0.68 0.41 -0.03 0.35 0.52 0.1 0.74 0.51 0.81 -0.17 -0.18 0.55 0.4 0.89 -0.16 0.68 0.41 -0.32 0.2 0.81 -0.29 -0.65 -0.06 0.53 -0.48 0.64 0.18 0.43 -0.32 0.2 0.81 -0.29 -0.65 -0.06 0.53 -0.48 -0.56 0.9 0.23 0.7 0.46 0.81 0.18 0.23 0.79 0.64 -0.18 0.43 0.79 958 Danh gia moi lien hf tuong tdc giQ-a cac gigng khoan qua trinh khai thac via dau ^ f • • Dong tiJr gieng bcnn ep - • Dong tucmg tac giira cac gieng khai thde Rs > 0.9 0.65 < Rs < 0.9 Rs < 0.65 giSng khai thde gidng bcrm 6p Hinh 1: HuoTig dong chay mong mo Bach Ho giai doan 6/1995 ^ 12/1996 iHyjn tap bao cao HQi nghj KHCN "30 ndm Dau Vift Nam: Cff hpi mdi, thach thirc mdi" 959 Cac giai doan tu thang 1-1997 din thang 9-1999 va tu thang 10-1999 din thang 6/2001 dugc dac trung boi viee tilp tue gia tang s6 lugng cac gilng khai thac va bom ep nuac Mac du, giai doan mli lien he tuong tac giua cac gieng khoan dugc phan b l theo nhilu huang khae ban so voi truoc, nhung huong dong chay thuy lire van ehu ylu theo phuong triing voi phuong ciia he th6ng niit ne va dut gay chinh mong (Hinh 2) Viec cac gieng bom ep giai doan co m6i lien he vai cac gieng khai thac theo nhieu buong hon so voi thai ky truac co thi dugc giai thich rang thai ky diu dong nuoc bom ep di chuyen chu yeu theo cac kenh chinh cua he th6ng mit ne, tu tu sau mot phan nuoc bom ep se phan ling lire xulng day via, phan thi tiep tuc theo he th6ng mit ne dugc luu thong mgt each phuc tap ban de di chuyen ve huang cac gieng khai thac kbac Vi vay, giai doan diu cac gieng bom ep c6 moi lien he tuong ho dang kl voi cac gilng khai thac chi theo mot so buong nhat dinh, sau chiing moi tung buac co dugc mli lien he tuong tac theo nhieu huong khae toi nhung gilng khai thac kh6ng luu th6ng true tilp voi chiing th6ng qua cac kenh dan chinh ciia he th6ng mit ne via Can phai nhin manh ring huong dong chay tu cae gieng bom ep den cac gieng khai thac giai doan bing phan tich tuong quan hang Spearman (Hinh 2) blu nhu trung hgp vai kit qua nghien ciiu bom chat chi thi Vien Hat nhan Da Lat tien hanh lam cho cac gilng khoan phia BIC ciia mong mo Bach H6 vao nam 2001 - 2002 [7] Hon nQa, phan tich tuong quan Spearman co the xac dinh dugc buong dong chay cho tit ca cac gilng khoan mong, bom chat chi thi vi nhiing ly vl ky thuat va thuang mai, chi co thi lam cho mot s6 gieng cue bo ma th6i Theo gia trj cua he s6 tuong quan giQa cac gieng bom ep va cac gieng khai thac bi ngap nuoc co the phan chia cac gieng bom ep ba nhom: • Nhom cae gieng bom ep: ngu6n gay ngap nuoc chinh cac gieng khai thac nhu cac gieng BOS, B55, B25 va B47 Hau nhu tat ca cac gieng ngap nuoc ciia khoi Trung tam mong mo Bach Ho deu co he s6 tuong quan duong cao voi cac gieng khoan tren Dieu duong nhien la phai de xuat triet de ban che san lugng bom ep nuac doi voi nhung gieng • Nhom cac gieng bom ep co moi lien he dang ke voi cac gieng khai thac bi ngap nuoc nhu B64, C14, Cl 1, B36, B37 Doi voi nhung gieng nen de xuat han che bat san lugng bom ep nuoc • Va CUOI cung la nhom cac gieng bom ep co moi lien he true tiep khong dang ke voi cac gieng khai thac bi ngap nuoc nhu B27, B33, B52 Doi vai nhung gieng nen de xuat gia tang san lugng bom ep nuoc mot each than trgng truang hgp cin thilt 960 Danh gia mdi lien he tuoTig tac giua cac gilng khoan qua trinh khai thac via dau n t R s > 0.9 0.65 < Rs < 0.9 Rs - gieng khai thde ' - gieng bomi ep Hinh 2: So huong dong chay chinh tir cac gieng bom ep den cac gieng khai thac mong mo Bach H6 giai doan tir 1/1997 - 9/1999 va 10/1999 - 6/2001 Tuygn tap bao cao Hgi nghj KHCN "30 nam Phu Viet Nam: Cff hdi mdi, thach thuc mdi" %! KET LUAN Trong dilu kien th6ng tin tu nhung nghien ciiu true tilp vl mli lien he giua cac gieng khoan kh6ng dugc cung d p thuong xuyen, day dii va toan dien, phuong phap phan tich tuong quan hang Spearman theo chi tieu th6ng so lam viec ciia cac gieng khoan la mot phuang phap thich hgp de phan tich nhanh va cho nhQng th6ng tin dang tin cay ve m6i lien he tuong tac ciia cac gieng khoan cung nhu trang thai khai thac cua via dau mong mo Bach H i nhiing giai doan kbac cua qua trinh khai thac, eu the la phuong phap co thi giai quyet nhung van de chinh nhu sau: Xac dinh mli lien he thiiy lire giua cac gieng khoan Xac dinh huong van dong ciia nuoc va dong chay chat luu via Xac dinh tinh bat d6ng nhat ciia via dau theo dien tieh Xac dinh cac gieng bom ep nuoc la ngu6n gay ngap nuoc chinh cac gieng khai thac - Phan chia cac gieng bom ep nuoc cac nhom kbac de dilu chinh san lugng nuoc bom ep mot each hgp ly TAI LIEU THAM KHAO MHp3afl>KaH3afle A.X., AJIHCB H.A., VDcii^3ajxe X.B H ap., 1997 ^pazMeumu paspadomKU MopcKux necpmezasoebix Mecmopootcdeuuii BaKy: Hs^aTejibCTBO «3JIM» Mnpsafl^aHBaae A.X., OHJinnnoB B.H., AMCTOB H.M., 1998 CucmeMUbie memodu e uecpmedodbme MocKBa, PMHTK «He(|)TeoTAaHa» Mai Van Du, Nguyen Nhu Y, 2000 Ap dung phdn tich tuong quan di ddnh gid hiiu qud bom ip nu&c da chira nirt ne Tap chi Dau CH Azerbaijan, S6 7, 8-2000, tr 37 - 43 Phung Dinh Thuc va n.n.k., 1999 Cdng nghi vd ky thugt khai thac ddu NXB Giao due Ha Noi Tran Le Dong, Mai Van Du, 2000 Cdc ddc tinh thdm chira dac trung cua thdn ddu mdng md Bgch Hd qua phdn tich tdi lieu khdo sdt giing khoan Hoi nghi KHCN 2000 ''Ngdnh Dau tru&c thim thi ky 2r, NXB Thanh nien Ha Noi Tran Le D6ng va n.n.k., 1996 Md hinh dia chdt khdi m&ng ndng md Bgch Hd Tap chi D I U khi, s l Nguyen Huu Quang et al., 2003 Trgeers in water flooding study for reservoir characterization and optimization of oil recovery Technical Forum ""Cuu Long basin production: Challenges and opportunities'" Ho Chi Minh City ... mdi lign he tuong tac giua cac gieng khoan qua trinh khai thac via dau H6 De nang cao tin cay eua cac th6ng tin nhan dugc thi chi c6 cac he s6 tuong quan hang Spearman dat chuan ve miic dam bao... tuong quan am (-0,68) The nhung vao thai dilm gilng T02 bit diu bi ngap nuoc tu gilng T04 thi gia tri lien he tuong quan ciia chiing da tang manh len din +0,96 Trong do, gia tri lien he tuong quan. .. tdc giQ-a cac gigng khoan qua trinh khai thac via dau ^ f • • Dong tiJr gieng bcnn ep - • Dong tucmg tac giira cac gieng khai thde Rs > 0.9 0.65 < Rs < 0.9 Rs < 0.65 giSng khai thde gidng bcrm