Tuyen tap bao cao Hoi nghj KHCN "30 nam Pdu khi Vict Nam Co hoi moi, thach thuc moi" 27 KET QUA HOAT D O N G TIM KIEM THAM DO DAU KHI CUA TONG CONG TY DAU KHI VIET NAM CO UOI VA THACH THUC Tran Due Ch[.]
Trang 1Tuyen tap bao cao Hoi nghj KHCN "30 nam Pdu khi Vict Nam: Co hoi moi, thach thuc moi" 2 7
KET QUA HOAT D O N G TIM KIEM THAM DO D A U KHI CUA
TONG CONG TY DAU KHI VIET NAM: CO UOI VA THACH THUC
Tran Due Chinh Nguyen Van Dac Trinh Xuan Cirdng
Tdng cong ty Ddu khi liet Nam
TOM T A T
Cong tdc tim kiem thdm dd (TKTD) ddu khi a Viet Nam chrac bdt ddu lir nhirng mini
60 cua the ky XN Irai qua nhieu giai dogn khdc nhau Hoat dpng TKTD ddu khi chi tlnrc
sir dugc phdt trien mcinh me tir sau khi Tong cue Ddu mo vd Khi dot Viet Nam nay Id Tong
cong t\' Ddu khi Viet Nam (Petro Vietnam) dugc thdnh lap 30 nam trir&c day vdo ngdy
3-9-1975 Nha co chinh sdch doi m&i, ma cua ciia Ddng vd Chinh phii, trong thai gian qua
Tong cong tv Ddu khi Viet Nam dd co nhirng bir&c tien virgt bgc ve ca chdl va lirgng 50
hgp dong ddu khi v&i nhieu cong !}• ddu khi l&n cua Ihe gi&i dd dirge ky kel ihirc hien;
trong do 27 hgp dong dang con co hieu lire Ngodi cdc hogt dpng ciia cdc nhd I hdu nirirc
ngodi Tong cdng ly Ddu khi Viet Nam dd vd dang giir inpl vai tro ddng ke trong dieu hdnh
cdc hogt dpng ddu khi cimg cdc doi tdc mr&c ngodi vd von dong gop ngdy nipl limg (iham
gia 24 hgp dong ddu khi trong do co 5 hgp dong co von dong gop t&i 50% ) da bdi ddu
lir dieu hdnh nhieu dir dn TKTD a trong nir&c vd nir&c ngodi Cho t&i nay long so von ddu
tir cho Iham dd khai thac ddu khi tgi Viet Nam dgt tren 7 n'' USD v&i Inm 70 nio/phdt hien
ddu khi, trong do co 10 mo dang khai thac v&i son lirong quy ddu khoang 79.000nr
(530.000 thimg/ngdy dem)
Trir lirang vd tiem ndng ddu khi cdc he trdm tich De tam cua Viet Nam diirxc dir hao
khoang 4.6 ly nr quy ddu, phdn bo chu yen & them luc dia vd vimg dac quyen kinh le
Trong do tiem ndng dd phdt hien khoang 1.210 ly m^ quy ddu Igi cdc he Ciru Long, Nam
Con So-n, Malay - Tho Chu vd Song Hong Tuy nhien, mirc dp TKTD chii yen lap Ining a
1/3 dien lich them luc dia dd ky hop dong ddu khi v&i mirc nir&c dir&i 200m liem ndng
dim khi chira phdt hien a dien lich cdn lgi khd l&n, Id ca hpi dong th&i cimg liem an nhieu
llu'ich Ihirc cho cdc hogt dpng TKTD ddu khi Cong Idc lir dieu hdnh, lir ddu lir TKTD a
trong vd ngodi nir&c dd dirac trien khai khd tich cue, dd co mpt so phdi hien c/dii khi vd
bir&c ddu CO trd' hrang tir mr&c ngodi
De dam bao gia Idng Ini luang hdng ndm khoang 35 - 40 Irieii nr quy ddu nhdm
duy Iri sir phdt trien ben vimg cua Ngdnh Ddu khi Viet Nam, gop phdn ddp dng nhu cdu
ndng lirang quoc gia vd phdt trieu nen kinh te ddi mr&c, Tong cong ly Ddu khi Viet Nam
cdn day mgnh han nira cong tdc TKTD bdng cdch khuyen khich, ihii hiit ddu tir mr&c
ngodi kel hap v&i phdt huy noi lire tdng cir&ng lir dieu hdnh, lir ddu lir TKTD r/ irong
mrirc dong ih&i lien hdnh mua Idi sdn cimg nhir tdng cir&ng ddu tir TKTD a mr&c ngodi
nhdm hii ddp Iru hrang thieu hut a trong mr&c; xdy dirng Tong cong ly Ddu khi Vie! Nam
llianh mgi lap dodn ddu khi co hogt dong a ca trong vd ngodi mr&c
Trang 2- " Kel qua ho;it (long tim kiem thilm do dau khi cua l o n g cong t\ Dau khi \ ict Nam: ( o hoi \ a thach thiic
Viol Nam la mdt qudc gia cd tiem nang dau khi \di dien tich llicm luc dia \a \ img dac qu>cn kinh te gan 1 iricu km" bao gdm cac be tram tich De tam: Sdng Hdng Plui Khanh Ciru Long Nam Cdn San, Mala> - Ihd Chu Tu Chinh - Wing Ma> nhdm be
1 rudng Sa \ a Hoang Sa (Hinh 1)
Hoat ddng TKTD dau khi o Viet Nam da dugc bat dau trien khai o' mien \dng Ha Ndi \'a tning An Chau tu' nhung nam 60 cua tht: k> XX \di sir giiip dd ciia Lien Xd cii
Nam 1975 mo khi Tien Hai "C" da dugc phat hien a mien \dng Ha Ndi va dua vao khai
thac til' nam 1981 cho den nay
0 them luc dia phia Nam hoat ddng TKTD dugc tien hanh tir nhirng nam 1970 boi
cac cdng ty dau khi nude ngoai nhu Mobil Pecten Lnion i^^xas \ \
Sau ngii} mien Nam giai phdng 30-4-1975, cdng tac TKTD dau khi bude \'ao giai doan mdi danh dau bang xiee thanh lap Tdng cue Dau mo va Khi ddt Viet Nam nay la idng cdng ty Dau khi Viet Nam vao ngay 3-9-1975 Cdng tac TKLD dugc trien khai tren
pham vi ca nirdc a dat lien (mien vdng Ha Ndi ddng bdng sdng Ciiu Long) \a thim luc
dja phia Nam bang cac hgp ddng dau khi vdi cac Cdng l> AGIP (Italia), Deminex (CHLB Dire) \a Bo\v\alle\ (Canada)
104°OOE 108°l»E 112'OOe UffiOX
Trang 3Tuyc-n tap bao cao Hoi nghj KHCN "30 nam Pdu khi Vict Nam: C o hoi moi, thach thiic moi" 29^
Mdt bude nsoat quan trgng cua Nganh Dau khi Viet Nam la sir ra ddi cua Xi nghiep
liC-n doanh \'icls()\ petro nam 1981 va den nam 1986 ddng dau cdng nghiep dau tien da
dugc phcii hien lir tram tich Miocen a mo Bach lid Hai nam sau (1988) dau tiep iiic dugc
phai hien trong mdng mit ne trudc De tam Su phat hien na\ lam tha> ddi phan bd mi
lugng va ddi tugng khai thac tai mo Bach Lid gdp phan tang nhanh san lugng khai thac
hang nam ddng thdi dua ra quan diem dja chat mdi trong tham dd dau khi a be Cuu Long
ndi rieng va o them luc dia Viet Nam ndi chung
rir khi cd Luat Ddu tu nude ngoai (29/12/1987) va Luat Ddu khi (6/7 1993) da cd
hang chuc cdng ty tap doan dau khi Idn tren the gidi dau tir vao TKIT) tren toan them luc
dia Viet Nam
Ngoai cac hoat ddng TKTD do cac nha thau dau khi nude ngoai thuc hien irong
nhung nam qua, PetroVietnam da va dang tich cue dau tu, tu dieu hanh cac du an IKTD o
trong nude va da cd nhung bude di ban dau trong vice dau tu TKTD dau khi o' nude
ngoai Cho den nay, nhieu de an dau khi o nude ngoai da dugc ky ket va dang dugc thuc
hien trong di^i cd cac dc an PetroVietnam la nha dieu hanh Day la mdc danh dau sir truong
thanh vugt bae cua PetroVietnam tren con dudng trd thanh tap doan diiu khi cd hoat ddng
o' ca Irong va ngoai nude
CAC THANH TUD TRONG CONG TAC TKTD D A U KHI
\ Cac hoat dong TKTD dau khi
0 trong nude, den nay 50 hgp ddng dau khi PSC .IOC va BCC da dugc ky ket
trong dd 27 hgp ddng (Hinh 2) dang boat ddng idng sd vdn dau tu i'KTD cho den nay
dat gan 5 ly USD, trong dd su tham gia gdp vdn, vai trd dieu hanh ciia PetroVietnam giir
mdt vi lri dimg ke va ngay mdt tang (PetroVietnam cd ty le gdp vdn nhat djnh trong 24
hgp ddng dau khi, trong dd 5 hgp ddng chiem tdi 50%) Nhieu ky thuat va cdng nghe mdi
tien lien dugc ap dung da dem lai thanh qua to ldn, tiep theo vice phat hien dau trong
mdng nirt ne trirdc De tam tai md Bach Hd da phat hien nhieu md dau mdi trong ddi tugng
mdng nhu cac mo Rdng I Idng Ngge Rang Ddng Su Tu Den Sir Tu Vang Sir lu Irang
(be Cuu Long) Dai Hiing (be Nam Cdn Son) vii BIO (mien vdng 1 la Ndi)
Ngoai viec tham gia ciing \eVi cac nha thau trong cac hgp ddng dau khi trong thdi
gian qua PetroVietnam da va dang lich cue diiu tu, tu dieu himh 7 du an i K IT) a lir
Chinh - Vung Miiy, mien vdng Hit Ndi vinh Bae Bd viing bien mien Irung (be Phii
Khanh) \a dang khai thac mo Dai Hiing, Tien Hai C da khao sat khoang 3().()()0km dia
chiin 2D 830km" dja chiin 3D \ii khoan hon 10 gieng khoan tim kiem iham dd vii ihiim
lugng (TKTD&TL) vdi tdng chi phi khoang 150 trieu USD vit 200 ty VND Cdng uic lu
diiu lu dci cho phep di trudc mdt bude trong giai quyet cac muc lieu dieu tra co ban danh
gia tiem nang diiu khi phuc \u hoach dinh chien luge TKTD tiep theo cung nhu lao co so
keu ggi dau tu nude ngoai Ben canh mdt sd kel qua TKTD ban dau dang khich le (2 phat
hien khi gieng khoan (GK) thiim lirgng 05-1-DH 14X cho kel qua 650 liin dau/ngiiy)
cdng Uic lir dim lu da gdp phiin niing cao nang lire dieu hanh cua PelroN'ielnam
Nhieu chirong trinh nghien ciru khoa hgc cap Nha nude, ciip Ngiinh \ di himg tram de
Uii hoae nhiem \ u nghien ciru \a trien khai cdng nghe dii dugc ihuc hien gdp phim dinh
Trang 430 Ket qua hoat dong tim kiem tham do dau khi ctia T6ng cong ty Dau khi \ ict Nam: Cff hoi va thach thiix^
hudng va giai quNel cac \an dc khoa hgc - cdng nghe do thirc te TKTD dat ra di cd ddng gdp nhat dinh vao thanh luu trong TKTD dau khi ciia PetroVietnam
Qua hon 40 nam boat ddng TKTD tren lanh thd \ a thim luc dja Viet Nam Nganh Dau khi va cac cdng ty dau khi nude ngoai da lien hanh khao sat gdn 300.000km tu\en dja chan 2D khoang 30.000km" dia chan 3D, khoan tren 600 gieng khoan thiim dd thiim lugng va khai thac (Hinh 3 4) vdi tdng chi phi tren 7 t\ I'SD Da phat hien tren 70 mo/phat hien trong dd 10 md dang khai thac vdi tdng san lugng khai thac lir ciic mo niiy den thang 12-2004 dat tren 195 trieu m"* dau va 19 ty m^ khi Nhieu phat hien dau khi khae (d cac be Sdng Hdng Ciiu Long, Nam Cdn Son, Malay - Thd Chu) da va dang dugc thiim lugng va phat trien
O nutVc ngoai, tir cudi nhung nam 1990 PetroVietnam da cd chu truong va tiing bude trien khai dau tu TKTD dau khi d nude ngoai Cho den nay, PetroVietnam da tham gia vao 7 de an tham dd khai thac (TDKT) a nude ngoiii, trong dd cd 2 de an la nha dieu hanh Cac de an nay dang trong giai doan tham dd va tham lugng Du kien eudi nam 2006 dau 2007, PetroVietnam se cd san lugng dau dau tien tii' cac de an dau tu nude ngoai Diiy
ia mdc danh dau sir trudng thanh vugt bae ciia Tdng cdng ty Dau khi Viet Nam tren con dudng trd thanh tap doan dau khi cd boat ddng ca d trong va ngoai nude
^W'>0OE IOSOQOE 1 1 2 ' ' 0 0 E lieOOOE
Hinh 2: Cac hop dong dau khi dang hoat dong tai Vict Nam
Trang 5Tuyen tap bao cao Hoi nghi KHCN "30 nam Dau khi Viet Nam: Co hoi moi, thach thuc moi" 31
Nhu vay, trong 30 nam qua, dac biet tir khi cd chinh sach ddi mdi mo cua den nay hoat ddng lim kilm tham dd dau khi da dugc PetroVietnam (PV) trien khai rat tich cue, ddng bd loan dien d ca trong va ngoai nude, d ca khu vuc cac hgp ddng dau khi (dau tu nude ngoai) lan tu ddu lu, lu dieu hanh; nang lire quan ly va dieu hanh cdng tac TKTD da
cd nhirng bude truang thanh dang ke va da mang lai nhiing kel qua quan trgng trong xac dinh/gia lang trii' lugng va san lugng khai thac dau khi hang nam ddng gdp quan trgng viio
su phat trien cua diit nude
Ndm
1993, 1995
1995, 1998
2002 2004-2005
2002
2003
2003 2003-2004
Khoi lugng
12.000km
1 GK 7600km
2 G K
2 G K
1 GK 831km-9.672km
Hgp ddng phat trien md dau Amara
Hgp ddng tham dd - tham lugng dau khi
Id 433a cS: 416b
Hgp ddng PSC Id PM304
1 Igp ddng PSC Id SK305
1 lop ddng PSC Id Ddng Bae Madura I
1 lop ddng PSC Id Ddng Bae Madura 11
1 lop ddng PSC cac Id 19, 21, 22 TamtsaR
Khu virc ddu tir
Irae Angieri Malaixia Malaixia Inddnexia Inddnexia Mdng Cd
Ty Irong tham gia cua PV
100 (dilu hiinh)
40 (dilu hanh) 4,5 + 10.5= 15
29-4-2002 30-6-2003 1-8-2000 16-6-2003 14-10-2003 14-10-2003 5-11-1999
Trang 6Ket qua hoat dong tim kiem tham do dau khi cua Tong cong t\ Dau khi \ ict Nam: Co' hoi >a thacli thiic
i'u\ nhien do cdng lac TKTD chii yeu dua vao dau tu nude ngoiii nen luirc do
khdng ddng deu mdi lap trung chu yeu d \iing cd trien \gng nirdc ndng tdi 200m dien lich cac Id da ky hgp ddng dci cd boat ddng dau khi chi chiem khoang 1/3 dien tich loiin
them luc dia gan 2/3 dien tich cdn lai chii \eu o \iing nude sau xa bd v.v chua co uii
lieu hoae mdi chi dugc nghien eiru dia \at ly khu \irc can phai dugc day manh cdng lac TKTD Canh tranh trong thu hiit dau lu nude ngoai \ao TKTD trong khu \ire rat ga> gat can tiep tuc hoan thien cac chinh sach khuyen khich cae cdng l\ diiu khi qudc te dau lu vao Viet Nam Cdng tac dau tu, tu dieu hanh TKTD d trong \ a ngoai nude cdn nhd be ehua dap irng yeu cau do thieu kinh nghiem ehua cd hanh lang phap ly phii hgp va ban
che ve co che dieu hiinh hien hanh
Hinh 4: Ket qusi cong tiic thu no dia chan va khoan trong nam 1988 - 2004
2 Ket qua nghien ciiu dia chat va tiem nang ciia cac be tram tich Oe tam Viet Nam
Kel qua cdng tac TKTD trong thdi gian qua da xac djnh va lam sang td nhung ntH eau triic dja chat va he thdng dau khi ca ban eua cac be tram lich De lam cd triln vgng ddu khi o thcMu luc dja va dat lien eiia Viet Nam bao gdm cac be Sdng Hdng, Phii Khanh, Ciru Long, Nam Cdn Son Tu Chinh - Vung May, Malay - Thd Chu va nhdm cac bl trdm lich Hoang Sa, Trudaig Sa Trong dd cac be Sdng Hdng, Cuu Long, Nam Cdn San, Malay -Thd Chu duge xac dinh la cac be chira dau khi vdi nhieu phat hien ddu khi vit cae mo dans khai thac
Cac \iin de \ e dac diem cau Iriic dja chat, mdi trudng trdm lich, he thong ddu khi (cac chi lieu sinh chii-a, chan, thdi gian hinh thanh bay va dich chuyin ddu khi) vii dac biel \ iec danh gia tiem nang dau khi eiia Viet Nam ndi chung, ciia timg bl tram lich De tam ndi ricMig da dugc PetroVietnam nghien ciru danh gia theo mdl Id hgp phuonu phiip
\ il he thdng thdng nhiil
Irong khudn khd de an danh gia tdng the liem nang ddu khi Viet Nam - VITRA-IL tiem nang \a trir lugng diiu khi da dugc danh gia cho cae play (doi tugng chira ddu khi) chinh: mdng nirt nc trudc Kainozoi (play I), cat ket Oligocen (play 2) cat kit Miocen
Trang 7Tuy^n tap bao cao Hoi nghj KHCN "30 nam Dau khi Viet Nam: C o hoi mdi, thach thiic mdi" 33
(play 3), carbonat Miocen (play 4) va da phun trao (play 5) (Bang 3) Dudi da\- chi neu ldm tdt cac kit qua nghien cim dja chat va danh gia tiem nang dau khi ciia cac be tram lich
De tam cua Viet Nam cap nhat den het 31/12/2004:
Bang 3: Cac loai play 6 cac be tram tich Kainozoi Viet Nam
3b/Da manh vun
3 a/Da manh vun
2d/Bay dja tang do
2b/FIuvial dong bang
chau thd hoae dam hd
Phil Khdnh
Ciru Long
Nam Cdn San
Tu Chinh
Malay Thd chu
-MVHN
a Bi Sdng Hdng
Cac tai lieu hien cd cho thay, be Sdng Hdng la be dang pull-apart keo tach cd cau tnic dja chat phirc lap, keo dai tir mien vdng Ha Ndi ra bien theo hudng Tay Bae - Ddng Nam (TB-DN) chiem phan ldn vinh Bae bd den khu vuc bien mien Trung tiep giap vdi be Phil Khanh Sir hinh thanh va phat trien bl Sdng Hdng cd lien quan true tilp din boat ddng ciia he thdng dirt gay Sdng Hdng theo hudng Tay Bde - Ddng Nam va A Bde Nam thudc ria Tay Bae Bien Ddng Chinh cac he thdng dirt gay nay da phan chia vii khong chi cac don vi cau tnic chinh cua be Sdng Hdng (Hinh 5)
Trang 83 4 Ket qua hoat dong tim kiem tham do dau khi ciia Tong cong ty Dau khi \ iet Nam: Co hoi \a thach thiic
Be Sdng Hdng dugc lap day bdi tram lich Kainozoi \di be day cd the dat ldi tren 14km d trung sau trung tam Can cir vao dac diem tram tich, be cd the phan ra 2 viing Bae
va Nam vdi dac diem tram tich khae nhau Dia tang d phia Bae gdm ca mien vdng Ha Ndi dugc thanh tao bdi cac tram tich luc nguyen, ddi chd chira than cd tudi tii' Eoxen den De tir nhung chieu day, mdi Irudng tudng tram tich phan ngoai bien cd thay ddi so vdi dat lien
6 phia Nam ngoai cac thanh lao luc nguyen cdn cd cac thanh tao carbonat tudi Miocen dudi (gieng 115-A-lX) va giira (Id 118 va 119) 0 day cd nhieu va day du cac ddi tugng chira ddu khi He thong ddu khi tai be Sdng Hdng da dugc nghien ciru va cd eae dac diem sau:
• Dd sinh: Cd hai tang da sinh chinh cd tudi Miocen giua va Oligocen Tang sinh
Miocen giiia cd ham lugng vat chat hiru co (VCHC) trung binh, chii yeu loai III cd kha nang sinh khi lii chinh 6 phan trung sau la da trudng thanh va mdi bude vao pha
di cu tir eudi Miocen Tang sinh Oligocen cd ham lugng VCHC trung binh, tdt ban d phia Nam be, nhung van la dang VCHC loai III la chinh, mdt sd noi cd gap VCHC loai
II, I cd kha nang sinh ddu tdt hon (phu be Hue, GK PV-XT-IX) Hau het da me Oligocen da trai qua tat ca cac pha tao san pham va di cu each day 1 0 - 2 0 trieu nam
• Dd chira: Trong pham vi be Sdng Hdng cd 2 loai da chira chinh dd la cac thanh tao
luc nguyen ed tudi Oligocen, Miocen, Pliocen dudi va da carbonat cd tudi Miocen Trong dd da chira carbonat phan bd chu yeu d phia Nam ciia be Ngoai ra, cac da mdng phong hoa nirt ne trudc De tam (da vdi) da phat hien d GK BIO-STB-IX la ddi tugng chira dang quan tam
• Dd chdn; Da cd kha nang chan d be Sdng Hdng la da hat min gdm set ket, bdt ket
tudi Oligocen va Miocen xen ke vdi cac da chira la nhting tang chira mang tinh chat dja phuong Ngoai ra, tang set ed tudi Pliocen sdm phd bien d phan Trung tam va phia Nam
be la tang chan khu vuc
• Bdy ddu khi: Cac loai bay dau khi d be Sdng Hdng rat da dang bao gdm cac cau tao
vdm, ban vdm ke dirt gay, bay dia tang lien quan den diapir set, cac ddi vat nhgn dja tang, cac than cat dang dap chan, ldng sdng cd, fan cat, cac bay hdn hgp va cac khdi xay carbonat tren dja liiy Tri Tdn Tuy nhien, cac bay cau tao d phan phia Bae ciia be dugc hoan thien mudn (cudi Miocen) nen sir tich tu ciia dau khi cd phan ban che
Trang 9Tuygn tap bao cao Hoi nghj KHCN "30 nam Dau khi Viet Nam: Co hoi moi, thach thiic mdi' 35
Hinh 5: He thong diit gay chinh va cac doi cSu true bl Song Hong
(theo PIDC)
Qua cac chi tieu neu tren va ket qua khoan TKTD da phat hien nhilu cdu tao chira khi quan trgng, be Sdng Hdng dugc danh gia cd triln vgng vl ddu khi, trong dd tilm nang sinh khi la chii yeu Tuy nhien, do anh hudng cua cac boat ddng nui lira Ire nen riii ro gap khi CO2 d khu vuc Nam - Ddng Nam Trir lugng va tilm nang ddu khi ciia bl Sdng Hdng dy' bao khoang 1100 trieu m^ quy ddu (chu ylu la khi) chiim khoang 24%o tdng tilm nang dau khi Viet Nam, trong dd tap trung chii ylu d play 3 va 4 (80%o) Tilm nang du bao ciia cac play chua dugc xac nhan chira ddu khi (1, 2a, 2b va 2d) cbilm 13%o tilm nang ciia bl cdn la cac ddi tugng TKTD tiem nang trong tuong lai Tai nguyen khi da phat hien khoang
250 ty m'' khi (da loai trir CO,), trong dd md khi Tiln Hai "C" d miin vdng Ha Ndi dang dirge khai Ihac va md D14, Ddng Quan "D" dang dugc thir via dai ngiiy nhdm danh gia kha nang thuong mai ciia cac phat hien nay
b Bi Phu Khdnh
Be Phil Khanh phan bd dge theo bd bien mien Trung, phdn ldn dien lich ciia bl cd
do sau nude bien tren 200m do vay mdi chi cd cac nghien ciiu dja chdn va chua cd khoan
tim kiem tham dd Du bao tram tich Kainozoi cd chieu day thay ddi ldn tir vai tram met d dge viing ria phia Tay din 7000 - 8000m lai trung sau phia Ddng, bao gdm cac thanh lao luc nguyen va cac thanh tao carbonat Be Phii Khanh bj chia cdt va khdng cbl bdi cac dirt gay hirdng Bae Nam va Tay Bde - Ddng Nam, chia bl ra cac don vj kiln lao chinh nhu them Da Ndng, them Phan Rang, trung Phu Khanh va ddi trugt Tuy Hoa (Hinh 6)
Trang 1036 Ket qua hoat dong tim kiem tham do dau khi ciia Tong cong ty Dau khi \ i e t Nam: Co' hoi vii thach tiiiic
Hinh 6: He thong dul gay chinh va cac doi cau true be Phii Khanh
(theo Nopec vd VPI)
Cac play cd kha nang phat trien d be Phu Khanh la cac thanh tao luc nguyen tudi Oligocen (play 2), Miocen (play 3), carbonat Miocen (play 4) va mdng phong boa nirt ne (play 1), tuy nhien do d viing nay chua cd cac gieng khoan tham dd nen cac dac diem sinh, chu'a, chan chi cd the du bao dua vao cac lien ket vdi cac be lan can va cac nghien CU'U diem Id dau tren bd
• Dd sinh; Be Phii Khanh cd the cd mat da me tudi Oligocen va Miocen sdm Ket qua
phan tich mau diem Id d khu vuc Dam Thj Nai, sdng Ba va Kontum cho thay mau tram tich hat min ludi Neogen tuong ddi giau VCHC (TOC = 1,79 - 2,64%, trung binh 2,0%), S2 = 8,22kg/T, PI < 0,3, HI = 242 - 866 Kit qua xay dung md hinh boa vdi ddng nhiet vao thdi ky dau Oligocen 1,22HFU, cudi Oligocen 1,35HFU, cudi Miocen sdm 1,07HFU, do sau dat cira sd tao dau d 3000 - 5000m
• Dd chira: Cac da chua la la cat ket tudi Oligocen, Miocen va Pliocen Ngoai ra, cac
thanh tao carbonat tudi Miocen va mdng phong hoa nirt ne ciing la da chira cd liem nang
• Dd chdn; Cac thanh tao set ket, set ket xen bdt ket tudi Oligocen va Miocen cung
nhu Pliocen la cac man chan quan trgng cho cac bay dau khi
• Bdy ddu khi: Ket qua minh giai tai lieu dia chan da phat hien mdt sd cau lao dang
vdm, ban vdm ke dirt gay, cac am tieu san hd ludi Miocen, ngoai ra cd the phat trien cac biiy thach hgc dia lang, cac bay hdn hgp va cac khdi nhd mdng trudc Dc tam bi chdn viii
Trang 11Tuyen tap bao cao Hoi nghj KHCN "30 nam Dau khi Viet Nam: Co hoi moi thach thiic mdi" 37
Mac dii he thdng dau khi lai be nay chua dugc xac dinh do chua cd gieng khoan TKTD nhung vdi chieu day tram lich Idn lai nam ke lien vdi cac be da cd phat hien va dang khai thac dau khi (be Cuu Long Nam Cdn Son) cung nhu cac dau hieu dau khi o viing ven bd bien nen be Phii Khanh dugc danh gia la be cd trien vgng dau khi Tiem ming dau khi cd the thu hdi cua be Phii Khanh du bao khoang 370 trieu m' qu\ diiu bang 8% ldng liem nang dau khi Viet Nam Tu>' nhien, do lai lieu cdn rdt ban che nen du bao vl liem niing nay chi phan anh dugc mdl phan liem nang ddu khi cua be nay
Hinh 7: Phan viing kien tao be Ciiu Long {iheo VSP)
• Dd me; Kel qua phan tich dia hoa cho thay cac tap tram tich hat mjn trong Oligocen
iren lii tiing sinh chinh lai be nay Hiim lugng VCHC trung binh 0,9 - 6,1% cd noi dai gia lri cao hon Sl dat l.38kg/T va S2 = 12,6lkg/T, chu ylu la Kerogen loai ll, ngoiii
ra cd ca loai I vii loai III nen sinh dau la chii yeu Trong Oligocen dudi (va Eoxen) vai
lieu hiru CO Cling phong phii (TOC = 0,97 - 2,5%) Kerogen loai II la chinh rat il loai III chu >cu chiing dugc lich luy o viing hd, ddm ldy Phdn Idn dien lich ciia Irdm lich
Trang 123 8 Ket qua hoat dong tim kiem tham do dau khi ciia Tong cong ty Dau khi \ iet Nam: Co hoi va thach thiic
nay ndm d ddi sinh ddu RO = 0,6 (2900m) - 1,35% (4200m) Chi cd cac khoi sul Ddng
va Tay cau tao Bach Hd nam trong ddi sinh khi condensat (bat dau lao khi 4400m) Ngoai ra cac tap set Miocen dudi (he lang Bach Hd) vdi TOC tren dudi 1% lii Uing sinh dau khi liem nang luy nhien chiing chi mdi bude vao pha truong ihimh o nhung vimg trung sau cua be Cac nghien cim md phdng qua trinh sinh dau khi cho thay pha
di cu cua dau khi tir da me sdm nhat cd the bat dau each day khoang 22 trieu nam (vao Miocen sdm)
• Dd chira; Trong khu vuc nghien ciru da chira mdng nut ne trudc De tam la ddi tugng
rat quan trgng va la da chira chii yeu d be Cuu Long Do rdng cd the dat tdi 13% va do thdm len tdi hang nghin mD Da cat ket Oligocen cting la ddi tugng chira quan trgng vdi do rdng thay ddi tir 2 - 22,4%), do thdm cd thi dat tdi hon 200mD Do sir bien tudng nhanh va do rdng, do tham khdng dn djnh nen khai thac dau tii' cac than cat Oligocen thudng gap nhieu khd khan Da cat kel Miocen ha ciing bat gap tai hau het cac md dang khai thac Do rdng tir 19 - 25,5%o, do tham 0,1 - 150mD Ngoai ra, cdn cd the cd da chira volcanic, tuy nhien be day, do rdng va tham rat khdng dn dinh cd riii ro rat cao
• Dd chdn: Tang set Rotalia Miocen sdm vdi ham lugng set chiem 90 - 95% ddi chd
100%o, phd bien rdng khap trong loan be, cd chieu day dn djnh tir 180 - 200m la tang chan khu vuc rat tdt Ngoai ra, cdn cd cac lang chan mang tinh dja phuong dd la cac tap set Oligocen dudi, Oligocen tren (tap D) va Miocen dudi
• Cdc dgng bdy: Trong pham vi be Cim Long cac dang bay cau tao phat trien ke thira
mdng, bay man chan kien tao kha phd bien trong tram tich Oligocen va Miocen dudi, ngoai ra bay hdn hgp (dja tang va man chan kien tao), bay phi cau tao (vat nhgn dja tang, doi cat ldng sdng cd) cting phat trien trong tram tich Oligocen va Miocen Dac biet, dang bay khdi mdng nirt ne dugc phii bdi cac tram lich hat mjn ddng vai trd bet sire quan trgng
Trii lugng va tiem nang dau khi cua be Cim Long dugc du bao khoang 820 trieu m"^ quy dau (18%o tdng tiem nang dau khi Viet Nam) chii yeu tap trung d mdng niit ne Tru lugng dau khi da phat hien d mdng, cat ket tudi Miocen va Oligocen khoang ban 500 trieu m'^ quy dau (chiem 61% ldng tiem nang dau khi ciia be) nhu vay trii lugng cdn lai chua phat hien se vao khoang 320 trieu m^ quy dau Hien tai, dau khi dang dugc khai thac tir 5
md Bach Hd, Rdng, Su Tir Den, Rang Ddng, Ruby va chuan bj phat trien md Su Tir Vang,
Su Tir Trang Tdng san lugng dau khi khai thac tir mdng den nay dat tren 120 trieu m"^ da
va dang khang dinh mdng nirt ne cd tiem nang dau khi ldn (70%o tru lugng va tiem nang ciia be) Trong tuong lai, mdng van thuc sir la ddi lugng TKTD can dugc quan tam ban nua khdng chi d be Ciru Long ma cdn d cac be lan can Ngoai ra, d be Ciru Long cac dang bay hdn hgp phi cau tao trong tram tich Oligocen kha phd biin va hy vgng cd thi phat hien cac md dau khi mdi tir cac dang bay nay Tiem nang dau khi ciia phan dat liln bl Ciru Long (trting Ciru Long) chua dugc danh gia mdt each day du do tai lieu cdn rat ban cbl, tuy nhien cd the du bao sir tdn tai cac trting Mesozoi ma tiem nang dau khi ciia nd dugc chimg minh d cac viing trung Ddng Bae Thai Lan Bdi vay, trong thdi gian tdi can phai dau lu nghien ciru danh gia liem nang dau khi cua cac thanh tao Mesozoi d dat lien thudc khu vuc be Ciru Eons