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Tap chi KHKT Mo Bia chat, so 31, 7120 ''''j^ PHAN TICH DAC TRUTVG KHAI THAC DAUTANG MIOXF MO BACH HO PHAM Dtlrc THANG, NGUYEN VAN MINH Tap doan Ddu khi Viet Nam TRAN DINH KIEN, Tnrang Dgi hoc Mo Dia chdt[.]
Tap chi KHKT Mo - Bia chat, so 31, 7120 'j^ PHAN TICH DAC TRUTVG KHAI THAC DAUTANG MIOXF MO BACH HO PHAM Dtlrc THANG, NGUYEN VAN MINH Tap doan Ddu Viet Nam TRAN DINH KIEN, Tnrang Dgi hoc Mo - Dia chdt Tom tat: Tdng Mioxen hg cd cau tn'ic khd phirc tgp vd la mot nhung thdn ddu khai thdc chinh cua mo Bgch Ho Tuy nhien ket qua khai thdc tdng Mioxen hg mo Bgch Ho cho thdy via dang giai dogn khai thdc cudi ciing sd lirang gieng khai thdc da khoan xong hodn toan vd ngdp nude trung binh toan ddi tirgng Id 71% He sd thu hdi ddu cudi ciing theo "Sa thiet ke cdng nghe khai thdc vd xdy dung mo Bgch Ho " nam 2008 cho toan thdn ddu Id 31% tiraOOSEg dirang 6144 trieti tdn Lirang ddu dir du kien cdn Igi khoang 136''5 trieu tdn Nhu vay, lirang ddu cdn Igi via la rdt lan vd do cdn phai trien khai viec nghien cini dp dung cdc phuong phdp toi irii hod khai thdc de tan thu nguon tai nguyen ndy Bdi bcio ndy trinh bay cdc ket qua nghien ciru vd phdn tich nhung dgc trung ndng lugng via citing nhu lich sir khai thdc cua thdn ddu neu tren Ket qud ndy se giiip chiing la xdc dinh cdc nguyen nhdn lam suy giam sdn lirang tir dua cdc bien phdp nham dieu chinh vd toi ini hod qud trinh thiet ke, khai thdc cd hieu qud ddu thiigc doi tirgng cdt ket Mioxen hg md Bgch Ho 37, 42 va 45 cd gia trj trung binh la 28,8 MPa Tong quan dieu kien dja chat va khai thac quy ddi ve sau tuyet ddi-2810 m (ranh than dau Mioxen mo Bach Ho gidi quy udc ciia bien dudi bao hda dau) [5], Ap / / Khdi qudt ve dac trung dia chat - dja vat ly ciia tdng Mioxen suat via ban dau cua than dau Mioxen d Vdm Phuc he Mioxen thudc diep Bach Hd va Bac tai cac gieng rieng re (79, 98, 130, 136, phat trien hau nhu tren toan dien tich ciia md 202) dugc chap nhan la 29,3 MPa (chuyen doi vdi chieu sau the nam tii' 2759 - 2998 m dudi ve sau tuyet ddi - 2971m, ranh gidi quy udc muc nude bien [1.2] Cac tang san pham cua bag hda dau phirc he tinh tii' tren xudng dudi gdm cac tang Nhiet tu nhien ciia than dau Mioxen 23 24, 25, 26 27 vdi mu'c san pham cao cua bang nhiet ke sau cd chinh xac cao tai chiing dugc quan sat thay d vdm Bac va vdm cac phan ngung tre ciia than gieng nam phia Trung tam Cac tang san pham dugc gidi dudi khoang lam viec cac gilng khai thac han d tren va dudi bdi cac tang phan xa dja va bom ep sau la 80-1 10 "C Gradient dia nhiet chan lan lugt la SH-5 va SH-7 Tang phan xa khoang tii' 1800 - 3600 m la 3,5 "C/IOO dau tien dugc gan vdi ndc via ciia tang san m Do rong ciia tang san pham thay ddi tii' 0pham 23 tang phan xa thu' hai la mat bat chinh 33.5 %, trung binh la 17,7% hgp Mio.xen - Oligoxen tren Dau dat tru' Do tham: cac kit qua phan tich mlu loi lugng cdng nghiep ciia phii'c he dugc chung phdng thi nghiem va cac nghien cuu thiiy minh vao nam 1974 bang ket qua thir GK.BH-1 dong luc cho thay, ham thuc nghiem va quan he o vdm Trung tam cua cau tao Hien tai chi cd giira rdng vdi tham hai trudng hgp tang 23 la ddi tugng dang dugc khai thae [3.4] la ddng dang [6] Cot dia tang tdng hgp ciia phan lat cat chira san pham ciia md Bach Hd dugc md ta tren hinh I Ket qua thdng ke cho thay tham ciia ludi thay ddi tir 0,5 mD - 1650 Sd lieu ap suat via ban dau ciia tang Mio.xen ^- trung binh la239mD a \ dm Trung tam d cac gieng 1, 22 27, 12 lw6M.g