Đang tải... (xem toàn văn)
Hoi nghi KHCN 2000 "Nganh Dau khi Viet Nam trifdc them theky 21'''' DAC TI''''NH NGAP NLTOC CAC GIENG KHAI T H A C TANG MONG MO BACH HO KS Truang Cong Tai Vien NCKH & TK • XNLD Vietso vpetro TOM TAT dmo Bac[.]
Hoi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' DAC TI'NH NGAP NLTOC CAC GIENG KHAI THAC TANG MONG MO BACH HO KS Truang Cong Tai Vien NCKH & TK • XNLD Vietso vpetro TOM TAT dmo Bach Ho mdt loat cac gieng khai thae bi ngap nude a cac khoang nam a phan tren ciia than dau, cd the nude bam ep a ddi sau da dich chuyen len theo cac ddi eg tham tot, lien quan den cac ddi pha huy kien tao: Nude bam ep van dong via rat phirc tap, chii yeu la theo cac ddi dap va Vi mat ranh gidi dau nude khdng dong deu tinh tham chira ciia da mdng khdng ddng nhat nen da xuat hien mot sd luai nugc cd chieu cao den vai tram met lam cho he so quet khdng cao Lien doanh Dau Vietsovpetro da ap dung cdng mot he thong khai thac mdi nham kiem soat chat che su van ddng ciia nude bam ep de dieu chinh hgp ly qua trinh khai thac va bam ep Tuy nhien can tiep tuc thue hien cac nghien cUu thuy ddng luc qua tnnh khai thac, su thay doi ly hda chat luu, irng dung cac chat chi thi de lam rd dac tinh ngap nude tang mdng va cung cap cac thdng sd cho md hinh tinh toan thuy dgng luc, qua dd de xuat cac giai phap hitu hieu dekiem soat qua trinh ngap nude TiNH TRANG NGAP NUOC CAC GIENG KHAI T H A C TANG MONG MO BACH HO Bam ep nude bien vao vting can day de tri ap suat via cua tang mdng md Bach Hd la mdt quyet djnh cdng nghe mang y nghla khoa hgc, thgc tien ign va da duge phap ly hda bang viee phe duyet cae van lieu thiet ke khai thae md eua hdi ddng tham djnh cap Nha nude phe duyet 1993 va 1999 [ , 2] Vdi eae phuang phap khai thae tang mdng cd tri ap suat via, he sd thu hdi dau cao han so vdi phuang an khai thac theo che tg nhien 1,5 den han lan Dac trung ngap nude tang mdng md Bach Hd theo tinh toan md hinh (phuang an SDCN - 98) the hien tren Hinh Viec bam nude vao tang mdng dugc bat dau tg thang nam 1993 Gie'ng khai thac dau tien cd nude bam ep xuat hien san pham la gie'ng 094 (thang nam 1995) va sau dd ed them mdt sd gieng khai thac nua bi ngap nude; den cudi 1999 da ghi nhan hon 20 gie'ng cd nude san pham (chiem gan 30% tdng quy gieng khai thae) Ty le nude trung binh nam 1999 san pham tang mdng d mdc 3,7%, ed tdi gieng khai thae vdi luu lugng ban dau kha Idn: 600 - 800T/ng.d, gieng da ngUng tg phun do ngap nude eao Ddng thai ngap nude cae gieng khai thae khd'i Trung tam tang mdng md Bach Hd duac the hien tren Hinh va Hinh DAC TI'NH NGAP NLTOC CAC GIENG KHAI T H A C TANG MONG MO BACH HO Mdt loat gieng khai thac bj ngap nude d cac khoang nam d phan tren cua than dau, tham ehi d vting can nde mdng each ddi bam ep nude den 500 - 600m Vj tri eae khoang bi ngap nude cua mdt sd gieng dugc the hien tren Hinh Cd the gia thie't rang nude bam ep d ddi sau da djch chuyen len phfa tren theo eae ddi cd tha'm tdt lien quan chat che vdi eae ddi pha huy kien tao Mat cat dia chat - dia chan tren Hinh the hien hudng djch chuyen eua nude bam ep tu cac gie'ng bam ep 542, 545 den gieng 741 d phia tren theo cac ddi da mdng bj pha huy phde tap Nhjp ngap nude cac gie'ng khai thae rat nhanh, sau thang den - nam da dat 60 - 70% nude san pham, gieng se ngung phun San lugng thu hdi giai doan khai thac cd nude thudng nhd han 158 Hoi nghj KHCN 2000 "Nganh Dau Viet Nam trWdc them theky 21' 20% tdng san lugng dau cua gie'ng dd (Hinh 6) Tren Hinh thay rd rang, gieng 208 khai thae dugc trieu 150 ngan tan dau giai doan khai thae khdng ed nude, nhung tu bj ngap nugc den ngung tg phun chi khai thac dugc 144 ngan tan, hay 11% tdng san lugng, ty le d gie'ng 714 dg bao ^ 12 -14% Dac tfnh ngap nuge cac than dau da cacbonat nUt ne hang hde tudi Phan trang vung Graznui (Tresnia) cd nhung net tuang tg (Hinh 7) Dac tinh ngap nude nhu the thudng xay theo ca che day piston, nghla la chat luu van ddng chu yeu theo cac nUt ne Trong dieu kien matrix cd bao hda dau (nhu bao cao trU lugng md Bach Ho neu ra) thi he sd quet d dd cung rat nhd, va vi vay he sd thu hdi dau chung se khdng eao Nguge lai, nhu trugng hgp cac md d Groznui, nai matrix bao hda nude, dau nam nut ne hang hde, duang nhien he sd quet dau se cao va ket qua he sd thu hdi dau eao Dieu dd gdp phan ly giai van de he sd thu hdi tang mdng md Bach Hd khdng eao nhu cac md vting Groznui [3, 4] NHCTNG GIAI PHAP CHINH DI§U CHINH QUA TRJNH KHAI THAC VA BOM EP TANG MONG MO BACH HO Trong nhung nam then khai So dd edng nghe khai thac md Bach Hd, XNLD Vietsovpetro da cd nhieu giai phap nham nang cao hieu qua khai thac tang mdng Da de xuat va da then khai cdng viee hoan thien he thdng khai thac He thd'ng khai thae eu gdm ddi (Hinh 8) • Odi 1: Odi mu thd sinh, mdt sd gieng khai thae chu Igc d ddi dan dan bj loai bd bj tach manh, lam giam dang ke san lugng • Od 2: Ogi khai thae dau ehinh, cd chieu cao khdng Idn lai nam kep giua ddi mu khf thU sinh va dd bam ep nen rat de bj ngap nude, luu lugng cae gieng khdng cao va ludn bj de dga bdi sg banh trugng eua mu • Ddi 3: Ogi bom ep vdi eae gie'ng thang ddng, tiep nhan thap khdng dii bti khai thae va phai bam ep vdi chenh ap Idn d§ gay ngap nude cac gieng khai thac d phan tren Nham khae phue cae nhugc diem eua he thd'ng khai thac eu, tU nam 1995 da trien khai cdng mdt he thd'ng khai thac mdi gdm ddi (Hinh 9) • Ddi 1: Ddi khai thae d phan can nde • Ddi 2: Ddi bam ep nude d phan can day GiUa ddi la vung chuyen tiep cd vai trd dieu tiet qua trinh ngap nude Trien khai he thdng khai thae mdi, da khoan mdt sd gie'ng a ngang d phan can nde hoae chuyen khoang khai thac cac gieng len phan tren eho luu lugng cao; khoan mdt loat gie'ng a ngang d phan can day ed tiep nhan Idn, dam bao bu du lugng dau khai thae, gid duge ap suat via d mdc hgp ly Cac gie'ng bam ep d phan cao eua than dau da lan lugt dung bam ep va ban len phan tren de khai thae dau Kiem soat chat che su van ddng cua nude bam ep de dieu ehinh hgp ly qua trinh khai thac va bam ep dd cd viee kiem soat ddng thai ngap nude, cae ehi sd thuy ddng luc hgc, ddng thai cac chi' sd hda ly cua chat luu ke ca cac vi nguyen td, cae chat chi thj mau va danh dau phdng xa Viec dam bao dugc san lugng eao dn djnh eua tang mdng (10-12 trieu T/nam) vdi ngap nude san pham thap phti hgp vgi phuang an khai thac da dugc phe duyet la mdt edng Idn eua XNLD Vietsovpetro, dd cac ket qua nghien cuu dac tinh ngap nude eua than dau, then khai eae giai phap ky thuat edng nghe huu hieu cd vai trd dang ke 159 Hoi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' 90 70 cT "S 50 c Sr 40 c Q 30 20 10 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 He s6' thu hdi ddu, pdv Hinh Dac trung ngap nude cua than dau da mdng, md Bach Hd (Phuang an 3, SDCN-1998) i.,is< oiiaas OS ,ãằ os,ias oiisn si ,as ,,.,ô niaa aign ằ , ằ , ô7 lan ô , ã ! „ , « o, inr oiiin os iw7 o> i»t » » , i,,»? o,