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Tuygn tap bao cao Hoi nghj KHCN "30 nam Phu khi Viet Nam Co'''' hdi mdi, thach thiic moi" 4 5 7 sty DUNG CAC DAC TRUNG D Q N G LlTC (THUOC TINH) CUA TRlTOTVG SONG DIA C H A N D E NGHIEN CUtJ SlT PHAN BO[.]
Tuygn tap bao cao Hoi nghj K H C N "30 nam Phu Viet Nam: Co' hdi mdi, thach thiic moi" 457 sty DUNG CAC D A C TRUNG D Q N G LlTC (THUOC TINH) CUA TRlTOTVG SONG DIA C H A N D E NGHIEN CUtJ SlT PHAN BO CUA CAC DA CHU A TRONG LO 01 VA 02 THUQC PHAN DONG BAC BE C U U LONG • • \.U' Nguyen Huy Ngge Cong ty Petronas Carigali Vietnam ! ,!,,, : Ml, TOM T A T r li c : i i !::•'••< !•. Trong 16 01 va 02 thuge thim luc dia Nam Viet Nam, lAn dAu tien dAu da dugc phat hien vao nam 1994 boi gilng khoan 01-Ruby-IX tii- cac da chua thuge trAm tich Miocen duai va Oligocen cting nhu tir da chiia granit mit ne truoc De tam Ttr din cang CO nhieu dau dugc phat hien khu vuc, bien dAu dang dugc khai thac tir • ' ca cae da chira cat ket thuge Miocen duoi, Oligocen lAn da chira granit nirt ne Cac tai lieu dja chat gieng khoan va tai lieu khai thac dAu cho thAy mirc phirc lap cua tat ca cac loai da chua ke tren vl ca dac dilm phan b l lAn chilu dAy va tinh chAt chira cua chiing Do vay, tii- nam 1997 ky thuat xac djnh mirc In djnh hinh dang xung song dja chan (CCT) va cac thuge tinh dja chan da dugc ap dung dl nghien cim da chira Mgt s l ket qua dat dugc da duge c6ng b l vao nam 2001 cong trinh [3] Voi muc dich danh gia tiem nang lai ciia 16 va nghien eim chi tilt cac cAu tao da CO phat hien dau khi, lam co so cho chuong trinh phat triln mo giai doan lai, loan bg phan lai ciia 16 voi dien lich gAn 2000km^ da dugc khao sat bAng dia chAn ba chilu Trong qua trinh minh giai tai lieu, nhilu c6ng cu minh giai hien dai nhAt da dugc ap dung de nghien cim sir phan b6 da chiia khu vuc DAC DIEM CUA CAC LOAI DA C H I T A Trong 16 01 va 02 dau da dugc lim thAy cac lop cat kll thuge trAm lich Miocen duoi, tram tich Oligocen (bao gIm ca Tra Tan gitra lAn Tra Tan duai) va da granit nirt ne truoc De tam (Hinh 1) 458 Sii- dung cac dac trung ddng luc (thudc tinh) ciia trudng sdng dja chhn dl nghign ciiu^MlPJiajlJ^^ MIOCEN Dirdi OUGOCEN Hinh 1: Anh huong Ien cac trud'ng dia vat ly ciia cac da chiia Miocen duoi, Oligocen va mong Granit nirt ne Cac tap cat ket Miocen duoi dugc dat ten tir MI-08 den MI-60 co chieu day thay doi tir den - 8m nam tap bien tien dugc gioi han boi mat tren la noc ciia tap set Bach H6 va mat duai la mat bien tien Cae tap cat ket ke tren da dugc tao nhiing moi truong tram tich kbac va thay d6i tir moi truong bien n6ng tai bien ven ba va chau th6 (Hinh 2), vi vay ehiing co chieu day va tinh chat chiia thay d6i khu vuc mo Ruby, cac tap cat ket Miocen dugc dae trimg bori s6 lugng Ion (ttr MI-08 den MI-60), dien phan b6 rong, tinh lien tuc t6t va chiia tot, nhung tien vl phia D6ng hoae Dong Nam nhu a cac khu vuc cau tao Topaz va Thang Long cac tap cat tror nen kem ban (Hinh 2) WHta I • OH k^ te^ IU| dMK n » t mOi m e i t Wo ateg biin v«n Mr vl ddn thi ã OkUpcii^TciUMD6ic*tlicU>^tkti^(lai)('i|Aia06iô8do BACHAN ã S*Bằ(fcHiôằUprtidBằy??sHKgW((;K^^^ Mb Hinh 6: Ban d l phi pha (A) va bien dp (B) irng \&i tap c^t MI - 09 v^ MI - 10 the hien dang quat ciia cac tap cat Tuyen tap b^o cdo Hdi nghj K H C N "30 nSm DSu Viet Nam: Co- hdi mdi, thach thiic mdi" 463 Dirqrc minh giii lii cit Biryc minh giai la ^ M ^ ' ^ - ^ y f fi i ' ' ^' » TOPAZ^ /'-^^450 '3116 /2979 Hinh 7: Ban dp cung am hoc the hien sir phan bo ciia tap cat MI - 09 PCV-1995 PCV-2002 Hinh 8: So sanh thuoc tinh dia chSn co kha nang phSn anh ranh gioi dau - nuo-c ciia tap c^t MI - 10 giira c^c tJii li^u dia chSn du-ffc thu n l nam 1995 va 2002 sau nam khai thac Dua tren ket qua dja chat cac gieng khoan, mgt s l tAng chira tuong dii tit da dugc phat hien ca tap D lan tap E, la cac tap cat kit voi chilu day ting toi 30m Ttr vi tri gilng khoan cac tap cat co thi dugc khoanh djnh theo cac dj thuong CCT hoae bien dja chAn (Hinh 9) Nhung cac tap cat se dugc bilu diln ro ret hon bAng cimg am hgc dja chAn va kit qua phan tich phi tai-lieu (Hinh 10) 464 Sii- dung cac dac trung dong luc (thuQc tinh) ciia trudng sdng dia chan d l nghign ciiu su phan bd Thu9C tinh CCT Bien 36 am trung binii Km Ca thuQC tinh CCT va bien am trung binh khong hi^n ro su- phan bo ciia tap cat OL-10 Hinh 9: Cac thuoc tinh dja chan ciia song phan xa tir tap cat QI -10 Do cirng am hoc a tan so 80Hz Do cirng am hpc Km Ca cirng am hoc va dp cirng am hoc a tin so 80Hz the hien ro su- phan bo cua tap cat OL-10 Hinh 10 Do Cirng am hoc cua song phan xa tu-tap cat QL - 10 Cting voi CCT (da dugc tac gia trinh bay c6ng trinh [3]) giai nguge dja chAn (tinh cimg am hgc) va phan tich phi khong chi la nhung c6ng cu hieu qua dl nghien cim cac da chira tram tich, ma la cac e6ng cu hiiu hieu dl nghien ciiu da mong granit nirt ne tai khu vuc nghien ciiu Hinh 11 cho thay kha nang ciia giai nguge dja chAn viec lam ro be mat mong dieu kien ph6ng nhieu cao So voi tai lieu dja chAn thong thuong thi giai nguge dia chAn Tuygn tap b^o cao Hgi nghj KHCN "30 nam Phu Viet Nam: Co' hdi mdi, thach thiic mdi" 465 cho phep lam n6i ro hon cac phan xa ttr diit gay va cac doi mil ne mong (Hinh 12) Tuy nhien Hinh 12 cting cho thay han che ciia giai nguge dja chan viec lam tang anh buong ciia phan tAn so thap t6n tai ben duoi be mat mong D I ban cbl anh huong eiia phAn tan s6 thap phuong phap phan tich phi da dugc nghien eiiu ap dung va da dat duoc kit qua tit (Hinh 13) Hinh 14 va 15 chimg minh hieu qua ciia viec img dung t6 hgp cac c6ng cu giai nguge dja chAn va tilp la phan tich phi nhAm thi hien ro cae doi mit ne mong cac khu vuc ph6ng nhilu cao so voi sir dung c6ng cu CCT hoae chi phan tich Hinh 11: So sanh cac mat dt dia chan (A) va cac mat c^t cu-ng am hoc (B) cho thay mat cat cirng am hoc co kha nang nhan manh cac phan xa tir mat va mat ben mong Hinh 12: So sanh cac lat ck dia chan (A) va lat ck cirng am hoc (B) viec thi hien cac yeu to ben mong 466 Sii dung cac dac trung ddng luc (thuoc tinh) ciia trudng song dja chdn dg nghign ciiu sujph^an bd Hinh 13: So sanh cac lat cat cirng am hoc (A) va lat cat ciia bien cua cirng am hoc (B) 6' thoi gian 2040ms (A) 5mWo«lts,ia»pVla*;(te.TopBaMjPJnv_>4(KHO_025K(j\mpl a F^b Ufpta Contoun Wtb (B) SasW«WMapyi£W;Re_Topa»e_TP_PCTM.«.140.DFT.02SHij^^^ jloitaini Fuill) Uipfitng Coirlom SVtIh Hinh 14: So sanh cac ban bien cua cung am hoc (A) va CCT tu tai lifu dja chan goc (B) 6' mirc 90ms dudi mat mong Tuygn tap bao cao Hdi nghj KHCN "30 nam DIU Viet Nam: Co' hdi mdi, thach thiic mdi" (A) Vii-*OiU"\UpVint Rl- Topflii^ TP hn +'Oi-TJ0 ontCJlintf 467 (B) WsWofki/'MapVlafRe.TopfliieTPPSTM -10 I lOjDn 0"*5hL>inrf Hinh 15: So sanh cac ban bien ciia cirng am hoc (A) va bien tir tai lieu dja chan goc (B) ff muc 90ms duoi mat mong KET L U A N V A D E NGHI Voi muc dich phat hien va khoanh djnh cac da chira, cac dac trung dgng lire dja chAn can dugc khai thac khong chi giai doan nghien cim chi tilt cac cAu tao ma phai dugc sir dung giai doan nghien eim khu vuc nhAm xac djnh moi truong tao va dac diem phan b6 khu vuc cua chiing Y)c nghien cim cae tap cat kit Miocen duoi or trting Cim Long, khao sat va xir ly cac tai lieu dja chAn cAn ap dung cac bien phap nhAm bao tin bien va cac phan tan s6 cao cua cac song phan xa Buoc miu hoa 2ms cAn dugc ap dung qua trinh xir ly s6 lieu Cac ky thuat giai nguge dia chAn va phan tich phi kh6ng chi dugc sir dung dl nghien cim cac dii tugng trAm tich, ma chiing co hieu qua nghien cim cac da chiia granit mit ne thuoc mong truoc De tam TAI LIEU THAM KHAO Dylna Mair, Qingrong Zhu, 2004 High-resolution fades delineation using spectral decomposition in Junggar basin, China Thirty-second annual general meeting of the IPA March 2004 F Hasan Sidi, 2004 Inversion technology for reservoir characterization in Indonesia Thirty-second annual general meeting of the IPA March 2004 468 Su- dung cac dac trung ddng luc (thudc tinh) cua trudng sdng dja chan dg nghign ciiu sir phan bd Peter Majd Tandom, Nguyen Huy Ngoc, 2001 Application of coherence cube technology and seismic attributes in Ruby field SEAPEX 2001- The SEAPEX Exploration conference & Farm-out Forum, Singapore- April 2001 Sigit Sukmono, 2004 Characterizing reservoir using seismic stratigraphy, seismic inversion & seismic attributes Thirty-second annual general meeting of the IPA March 2004 ... kien cua 16 01 va 02 cae kyihual sau da dugc nghien ciiu va iing dung co hieu qua: Tinh w ciing am hoc sau phan^i''fi^^i^^nl^ MOT SO KET*0UA ifNQ DUNG^ ^.^^ _ - , Trong 16 01 va 02 cac ky thuatif«a''qui... Tuong tu nhu o cac khu vuc khae cua trting Cim Long, da granit nut ne thuoc mong truoc De tam eiing la mgt nhung d6i tugng chinh ciia 16 01 va 02 Trong mong granit cac doi nirt ne voi b6n phuang... mdi" 459 Trong trting Cim Long noi chung tap D (Tra Tan gitra) dugc coi la da ehira chinh cho tAt ca cac dii tugng ding thai cting la tap chan chinh cho mong granit mil ne Song or 16 01 va 02 tap