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380 Kgt qua nghign ciiu dja hoa gieng khoan Enreca 1 o trung Song Ba mot bang chiing cua^da me KET QUA NGHIEN ClTU DIA HOA GIENG KHOAN ENRECA 1 6 TRUNG SONG BA M O T BANG C H L T N G CUA DA ME SEVH DA[.]
380 Kgt qua nghign ciiu dja hoa gieng khoan Enreca - o trung Song Ba: mot bang chiing cua^da me KET QUA NGHIEN ClTU DIA HOA GIENG KHOAN ENRECA-1 TRUNG SONG BA: M O T BANG C H L T N G CUA DA ME SEVH DAU TUOI MIOCEN VA Y NGHtA CUA NO DOI VOI CAC BE TRAM TICH VIET NAM Le Van Hien Viin Ddu Khi H.L Petersen, L.H Nielsen Cue Dia chdt Dan Mach TOM TAT Trdng Sdng Ba Id mdt bi trdm tich tre, phdt triin doc theo hai ben b& Sdng Ba Ndm 2002, giing khoan Enreca-1 cd chiiu sdu gdn 500m da dugc thi cdng vd thu dugc nhieu kit qud dia chdt thii vi Vi phuong diin dia hda huii co, cdc trdm tich Miocen & day cho thdy chimg rdt gidu vdt chdt hiru ca cd tiim ndng rdt tdt di chuyin hda thdnh hydrocarbon, ddc biit gap rdt nhiiu mdu cd the tr& thdnh da me sinh ddu cd dii cdc diiu kien vi nhiet O Viet Nam, cd nhiiu bi trdm tich Di tam nhu bi Phu Khdnh ndm & vimg ciia Sdng Ba, triing Hd Ndi cd chua nhiiu tap than vd set than, v.v cd thi tim thdy su tuong tu nhu triing Sdng Ba ve phuang dien da me sinh ddu GIOI THIEU Song Ba bat nguon tir cac day nui cao thuge vimg Kon Plong, chay gan theo huang Bic Nam qua An Khe, Phu Thien roi hgp luu voi nhanh A Yun bat nguon tir eao nguyen Pleiku chay theo huong Dong Nam qua Phu Tue den Son Hoa uon dong sang huang Dong truoc bien qua cira Tuy Hoa Nhu vay, triing Song Ba bao quat mgt viing rong Ion bao gom cac tinh Phu Yen, Quang Ngai, Binh Dinh, Gia Lai va Kontum Hai ben song la mgt vimg trung dugc lap day tram tich Neogen - De tu va duge ggi chung la triing Song Ba Triing Song Ba duge tao boi nhieu don vi cau true nhung quan trgng nhat la dia hao Krong Pa co chieu rong toi hon 10km va dai gan 40km, dac biet la lop phii day gan 500m day, khuon kh6 du an ENRECA duoi su tai trg ciia DANIDA (Dan Mach), gieng khoan Enreca-1 da dugc thuc hien voi muc tieu bo sung tu lieu dia chat triing Song Ba va dong gop vao sir so sanh voi cac be tram tich khae khu vue day trinh bay cac ket qua nghien cim dia hoa him co thu dugc tir gieng khoan Enreca-1 va mgt vai nhan xet doi voi cac be tram tich De tam khae Viet Nam SO LUOC VE DIA CHAT TRUNG SONG BA Cac tao Kainozoi (De tam) trung Song Ba ehu ylu eo tu6i Neogen, he tang Song Ba ehilm hon nira dien phan b6 eiia trung Song Ba, thuge phan Dong Nam, tir Pleiku xulng Tuy Hoa voi dien tich khoang 1.700kml Chung chi 16 a ria phia Bic phu triing A Yun Pa ria Tay Nam va Dong Bic phu trung Krong Pa, mgt dai nho Son Hoa, Tuygn tap bao cao Hoi nghj K H C N "30 nam Dau k h i Viet N a m : Co' hoi m o i , thach thuc m o i ' 381 lai nim chim duoi lop phii trim tich De tu va bazan Tram tich eiia he ting dac tnmg eho tuong h6 luc dia thuin tuy, co tinh phan nhip diln hinh Mat cat tir duoi len gom hon 30 nhip, moi nhip bit diu la trim tich hat tho chuyin len trim tich hat min, co the chia phan sau: " " " " ^ V • •'^'NISA ' ,- j fflOOUC, TIIVHOA -^-.-^V -\VTlA'HtA ^^H^u S6N(1H1NH; _ !sôiôƠh/i i t ' BtiTlvH '^"^Ir KKlBt 109" 10 •Tuy KlA I I- Enreca-1 50km Thanh ph^, thi xa -I I EXfdngbifingiCli qu3c gia Tuytf^n mat cSt Di^mkhdo sit * Vi tri GK Enreca-1 Hinh 1: Vi tri dia ly Idiu vu-c nghien ciiu • Phan duoi dugc tao boi tir den nhip tram tich hat tho mau xam gom cuoi ket, cat ket, bgt ket, xen kep set ket, set than, chua via mong than nau, phan lop mong, gan nhu nam ngang, gan ket tot hon so voi phan tren, nhung ehua hoan toan da, c6 chieu day 20 150m Phan gap a gieng khoan 310 (Chu Se) voi nhip tram tich hat tho va thuang 16 a ven ria triing Khoi lugng set ket chiem khoang - 10%, cat ket 60 - 95% • Phan tren ciia he tang phat hien dugc tir 15 den hon 26 nhip tram tieh hat den vira, bao g6m set ket, bgt ket, eat ket; lop kep san ket, cuoi ket chira thau kinh bentonite va - 11 via than nau Tai phu trung A Yun Pa, he tang S6ng Ba co quy m6 phan b6 Ion nhit, phin trung tam bi trim tieh De tir phii day toi 40m ria Bic 16 dai lan nhung bl mat bi phong hoa manh Tai gieng khoan 4, co sau kit thue khoan 450,2m co thi phan chia 26 nhip, dac trung cho phin tren ciia he ting He ting Song Ba o day day hon 500m Kgt qua nghien ciru dja hoa gieng khoan Enreca - d trung Song Ba: mot biing chung ciia da me X CO g * JT O 11 £ I _ji>.i;LljlLljllill liULLl- es a o a o o E il_L_ Inert t:zt Ol i S?^* ll rI.I |i 1 1L_ ; lU J ' O 1 cr : to j ( i/i