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DL; BAO CHAT LI;ONG OA CHLTA TANG MIOCEN TRUNG CUA MOT so CAU TAO PHIA BAC BE SONG H O N G KS Nguyen OUOng Trung, ThS Tran NhU Huy Cdng ty TNHH MTV Dieu hdnh Thdm dd Khai thdc Ddu khi trong nUdc TS Ng[.]
DL; BAO CHAT LI;ONG OA CHLTA TANG MIOCEN TRUNG CUA MOT s o CAU TAO PHIA B A C BE SONG H O N G KS Nguyen OUOng Trung, ThS Tran NhU Huy Cdng ty TNHH MTV Dieu hdnh Thdm dd Khai thdc Ddu nUdc TS Nguyen Quoc Quan Tdng cdng ty Thdm dd Khai thdc Ddu Tdm t i t Be trdm tich Sdng Hdng dUde hinh thdnh vd phdt trien qud trinh va chgm cua mdng An Dd vdo mdng A vd chuyen ddng trUdt ngang theo hi thdng ddt gdy Sdng Hdng kem theo xoay cua cdc vi mdng Do sUdich chu ngang vd xoay ndy md tiiy tdng kbu vdc be, trdm tich bi cbdn vui sau dd Igi duac ndng lin, bdo mdn dcdc dd khdc Vi vdy, dd sdu hiin tgi cua via chda khdng hodn todn phdn dnh mdc chdn vui cOa dd qu Niu chi thudn dUa vdo quan hi suy gidm dp rdng theo chiiu sdu tUcdc gieng khoan Idn cdn dedubdo ddc tinh chda tgi cdc edu tgo chUa khoan (undrilled prospects) si tiem dn sai sd ldn chUa tinh den dnh bUdng cua qud bdc mdn bi ddy trdm tich phu trin Khi sddung kit hdp tdi lieu dja chdn vd dja vdt ly gieng khoan dkhu vUc ldn edn cd the giup gidm thieu rui ro t dubdo chdt luang dd chda cua cdc cdu tgo chda khoan Sddung cdch tiep cdn vdn dinbutrin, nhdm tdc gid bdo chdt lUdng dd chda tdng Miocen trung eua cdc cdu tgo tiim ndng KLvdDI phia Bdc be Sdng Hdng I.Mddau Be tram tich Sdng Hdng trii dii tU dat lien chiu thd Sdng Hdng eua Viet Nam, xudng phia Nam eua dio Hii Nam - Trung Qude theo hinh ellipse, dii khoing 600km Be tram tieh dupe tao thinh Paleogen va Neogen Chieu diy cua eie Idp phu tram tieh, d trung t i m bdn trung cd ehd dat 17km [2] Dieu niy cho thay cic eau tao (nhat l i d khu vue trung t i m bdn trung) da tUng bi ehdn viii rat siu Tuy nhien, qui trinh nghjch dio kien tao, dp siu hien tai eua cic ciu tao niy khdng phan inh ehinh xie mUe dd ehdn viii trUde dd Qui trinh phit trien cua be tram tieh Sdng Hdng rat phUe tap Theo nhin dinh eua nhdm tic gii, qui trinh nen ^p dan den nghich dio t i p trung d phan phia Bic eua be tram tieh (trong ed Ld 103 & 107 - Hinh 1) xiy manh khoing thdi gian tU 10,5 - 5,2 trieu nam v i sau dd giim di MUe dp ning len v i bio mdn ed chd tren 1.000m (8, 9] (dif doin bdi Idemisu bing phuong phip phuc hdi mat cit - Bio eio dif bio Id, 1995) NhU viy, mUc dp chdn viii v i bio mdn d tUng eau tao rat Idn v i khie nhau, viy viee dU bio tinh ehat chUa theo dp sau g i p nhieu khd khin 12 BIO M l SO 4/2013 Phaong phap dU bao chat lUtfng da chuTa dUa tren tdc dia chan Co sd cua phuong phip la tde dp dja ehan eua dat di Vp = V(K-l-3/4M)/p Trong dd: Vp: Van tdc truyen sdng dpe; K: He sd sdng; p: shear modulus; p: Mat dp dat d i TUcdng thUc tren, cic yeu td ehinh inh hudng len vin tde dia chan gdm: dp rdng; khung d i (hinh qua qui trinh thinh da xi ming hda: qui trinh trao ddi chit xiy sau tram tieh xiy ehu yeu tram tich bj ehdn viii dan den i p suit, nhiet dd ting, tinh chat ly hda cua eie v i t lieu tram tieh, thdi gian ); i p suit thinh hi De lim tien de eho phuong phip, cic yeu td Inh hudng den tde dp truyen sdng ngoai dp rdng dUOe coi l i phdng chung (background) Phuong phip du bao chit luong d i chUa duoc de xuat nhu sau: PETROVIETNAM Dung quan hd dp rdng theo ehieu siu dua tren tai lidu cie giing khoan lin ein.TU dd, xie dinh duoc gidi han trdn v i gidi han dudi cua dp rdng bien ddi theo ehieu siu Mpi du doin eho eau tao chua khoan se nim bien dp cua gidi han Dimg tdc dp xU ly dja chin cua chien djeh thu nd (1 vintage - de dam bio sU ddng nhat eua thdng sd thu nd, cic loai nhieu ed the inh hudng den chat lupng phan tich tde dp xU ly) Trong nghien eUu nay, tde dp dia ehan dupe lay tU t i i lieu dia chin 2D dupe thu nd v i xCr ly nim 2011 bdi Fairfield Vietnam (Hinh 2) DUng quan he tde dp xif ly dja ehan tren ciu tao d i khoan va tdc dp gieng khoan de kiem tra chat luong van tde xU ly Neu d cic vi tri kiem tra thay ring sif thay ddi van tde xU ly tuong ddng vdi van tde gieng khoan theo ehieu sau thi chat lupng van tde xCf ly la tdt va ed the diing de dif bao ehat lupng da ehUa Dung quan he tde dp xU ly dja ehan trdn eau tao mudn du bio tinh chat ehUa v i tde dp dja chin duoc eie gieng da khoan lan can Neu tdc dp dia chan cua cau tao mudn du bao Idn hon tde dp dja chin dupe d eie gieng khoan d dp sau tuong Ung, thi tiem ning ehUa cua cau tao nim d gidi han dudi eua quan he dp rdng ehieu sau d i dung Ket luin theo hudng nguoe lai neu tde dp dia ehan d eau tao mudn du bio eham hon tde dp dja ehan dupe d eie gieng khoan xung quanh DU bio chat lUqrng da chura Ld 103 & 107 Hinh Tdi liiu 2D dia chdn thu nd vd xdly ndm 2011 bdi Fairfield Vietnam Ld 103 & 107 nim d khu vUc ngoai khoi phia Bae vinh Bie Bd va phia Tiy Bie eua be Sdng Hdng (Hinh 1) Khdng ke mdng va bay dia tang, khu vue nghien cUu tdn tai cic bay ciu true nam d d i t d i tudi Oligocen va Miocen Bay dit d i tudi Oligocen t i p trung d sUdn phia Tay eua bdn trung, la noi dat da tudi Miocen bj bao mdn eit gpt manh bdi nghich dio kien tao eudi Miocen Bay dat d i tudi Miocen t i p trung d trung t i m bdn trung, la noi dat da Miocen bj nghjch dio v i bio mdn it Do viy, bay tap trung chu yeu d cae dat d i tudi Miocen, cdn Oligocen thudng rat sau (> 4.000m) [4] nen khdng l i ddi tUpng tim kiem, thim dd Trong sd nhdng eau tao ehua tien hanh khoan thim dd ed cie eau tao thude Oligocen (B va C) v i cic eau tao thupc Miocen (DviKL).TUeie gieng khoan thim dd Ld, quan he dp rdng va ehieu siu dupc thiet lap (Hinh 3) TU quan he eho thay, d ciing dp sau, dp rdng thay ddi mdt dii khoing 10% Nhuviy, viec xac dinh cau tao chUa khoan nim d gidi han tren hay gidi han dudi la co sd quan trpng dU bio chat luong da ehUa Hinh Quan hi dd rdng vd chiiu sdu cua cdc giing khoan L6W3&107 De xay difng eO sd eho vide dU bio dinh tinh chat luong d i ehUa, tde dp dia ehan xif ly d eau tao d i khoan duoe ve trdn cung mdt dd thj vdi tde dp dia ehan gieng khoan de dU bio mUe dp Ideh eua tde dp xU ly dja chin va tdc dp thuc Hinh the hien tde dp xU ly dia chin THAM DO - KHAI THAC DAU KHi v i tde dp dja ehan gieng khoan 103-HAL-1X v i 103-DL-1X va Hinh la tdc dp xU ly dja chan v i tdc dp dja chin gieng khoan HD-1X Ket qui eho thay, gan nhu khdng cd sif chuyen djeh nio eua loai tdc dp cin phii hieu ehinh Van tde xif ly dja chin trdn eie cau tao B, C dupe the hidn Hinh Sau xif ly tdc dp dja ehan gieng khoan HD-1X va CQ-1X, tinh chit chUa theo dp siu cua eac eau tao niy nam khoing gida eua gieng HD-1 X v i CQ-1 X da khoan Ket qui niy cho phep dif bio ning dp rdng 10% cd the bio tdn den dp siu khoing 2.000m (ngoai suy tU quan he dp rdng - chieu siu trdn Hinh 3) Tuy nhien, dif bio niy se tiem an sai sd tip hpp quan he dp rdng, ehieu siu d Hinh ehu yeu l i cic di Miocen va khdng cd sd lieu ciia gieng CQ-1X Vdi eau tao D, van tde xif ly dja ehan duoc dung cimg vdi van tdc dja ehan tU gieng HAL-1X (Hinh 7).Theo 66 thj niy, phan siu dudi giiy, quy luit phin bd dO rdng theo ehieu siu tuong tu giing HAL-1 X; cdn phin siu hon giiy, xu the phin bd dp rdng chia lim hUdng: (1) tuong tu gieng HAL-1 X va (2) cd dp rdng tdt hon Cau tao KL la elu tao cd kich thude die biet Idn (khoing 50km^) dtrong Ld Rui ro Idn nhat cua cau tao niy la dp siu cua tang chUa kha Idn (nhUng dja tang d i phit hien d cic gieng d i khoan deu siu trdn 3.000m De di; bio ning ehUa d dp siu trdn 3.000m, quan he van tdc XLf ly theo ehieu thdi gian dupe dUng d Hinh Trdn quan he nay, tdc dp dja chan gieng khoan DL-1X dUdc dua vao (gieng khoan niy eho thiy dd rdng duoc bio t6n tdt d mdt sd via d diy gieng khoan, dp siu khoing 3.200m, ed lay ddgc mau MDT khi, nhidn khdng thir dupe SLf ed, dp rdng tinh tif log khoing 11%) TU quan he d Hinh 8, xu hudng dp rdng theo ehieu sau, cd nhilu Hinh Quan hi tdc dd xd ly dia chdn theo chiiu sdu thdi gian cdu tgo HAL DL Hinh6.Quanhivdntdcxdt^diachdntheochiiusduthdigianc6u Hinh Quan hi t6c dd xdly dia chdn theo chiiu sdu thdi gian cdu tgo B.Cvd giing khoan 102-HD-1X W2-CQ-1X tgoHD 14 Blum-SO 4/2013 PETROVIETNAM PhUofng hUdng nghien cufu tiep theo Do phuong phap du bio chat lupng 6a ehUa thdng thudng (da trinh bay d phan 2) ehUa tinh den khung d i va i p suit Id hdng, nen vide dU bao cdn nhieu rui ro.Tuy nhidn, phuong phap van la cd sd de ket hop vdi cac phuong phap nghidu cifu khic (nhU mdi trUdng tram tich, dja chan dia tang ) cho ket qua chinh xie hOn Dj thudng i p suit eao eung la mdt yeu td lam ehim tde dd dia chan, do cd the inh hudng den ket qui du bao Tuy nhien dj thudng i p suit cao lai giup bio tdn dd rdng Odi vdi khung da, phuong phap dupe thd nghiem eho d i tram tich lue nguyen Vdi d i carbonate can duoc nghien eUu them Rieng da luc nguyen, thay bing chi dung cic thdng sd quan he theo chieu sau don thuan, ed the phin ehia dat da t i p Idn la ddng taeh giin (synrift) va sau tach giin (post rift) thi vide dU bio cd the se ehi tiet Hinh Quan hi vdn tdcxCflydia chdn theo chiiu sdu thdi gian cduhon tgo Dvd giing khoan 103-HAL-1X Odi vdi sd lieu dja vat ly gieng khoan, neu ed duoe d eie gieng ciing mdt don v] kien tao va gan thi mUe dp tin tudng eua phuong phip se cao hon Tai lieu tham khio I Ld Tuan Viet, Vti Sy Ly, Nguyen Hdng Minh Cdc hogt ddng kiin tgo vd dnh hudng cua no din qud trinh hinh thdnh vd phdt triin khu vdc Tdy - Bae bitram tich Song Hong tCf kit qud phdn tieh tdi lieu trgng lUe vd dia ehdn mdi 2002 JL Ren Jian-Ye, Lei Chao, Wang Shan, Li Tao, Zhang Xiao-Li Tectonic stratigraphy framework of Yinggehai Quidongnan basin and Its Implication for tectonic province division in East Sea 2011 Doan Tham, Le Hai An et all Regional Geology Correlation Blocks 103-107.2008 Petronas Sequence Stratigraphic study of block 102-106, Song Hong basin Vietnam Anzoil Hanoi basin, geological evaluation 1995 Idemitsu Block 102 evaluation report 1995 Hinh Quan hi vdn tdc xdly dja chdn theo chieu sdu thdi gian Total 703-r-G-7X correlation and comparison with cdu tgo KL well 103T-H-1X ning ni m d gidi han trdn eua dd rdng quan he Idemitsu Final well report (Geology) 102-CQ- IX dd rdng - chilu siu d Hinh Nhu vay, t i / 66 thj Hinh 3, cd t h i dl/ doin dd rdng 10% ed the dupe bio tdn it nhat cho d i n 3.500m v i lac quan hon la den 4.000m Tat c i eae t i n g chifa cua elu tao KL d i u cd tudi Miocen trung hoic trd hon, dd di/ doin lac quan l i cd co sd Idemitsu Final well report (Geology) W2-HD-IX 10 Petronas Post-Drill Evaluation report 106-YT-lX I I Tota I Final Well Report (Geology) 103T-H-IX OlUKNf 804/2013 15 THAM DO - KHAI T H A C D A U KHI 12 Total Final Well Report (Geology) 103T-G-1X 13 Total Final Well Report (Geology) 107T-PA- IX 14 PI DC Final Well Report (Geology) 103-HOL-lX (in Vietnamese) 15 PIDC Final Well Report (Geology) W3-BAL-1X (in Vietnamese) 16 Petronas Final Well Report (Geology) 102-TB- IX 17 Petronas Final Well Report (Geology) 106-YT- IX 18 PIDC Exploration master plan, offshore Red River basin (in Vietnamese) 2004 19 Total, Vietnam Evaluation report, gulf of Tokin 20 PVEP-BD Provision of AVO study services blocks 103 & 107 (Landmark Graphics Malaysia) 2010 21 PVEP POC Blocks 103&107 Hong Long - Hac Long - Dia Long - Bach Long HIIP & Reserves Assessment Report 2011 Predicting the quality of Middle Miocene reservoir of some undrilled prospects in North Song Hong basin Nguyen Duong Trung, Tran Nhu Huy Petrovietnam Domestic Exploration Production Operating Co., Ltd Nguyen Quoc Quan Petrovietnam Exploration Production Corporation Summary Song Hong basin evolution was related to the extrusion and clockwise rotation ofthe Indochina block, which were caused by the collision of the Indian Plate and the Eurasian Plate The extrusion along the Red River Fault Zone accompanied by clockwise rotation ofthe Indochina block controlled the Tertiary sedimentation and deformation ofthe North Song Hong basin As the deformation varied along the Red River Fault Zone, the strong uplift and erosion in Late Miocene were only recorded in North Song Hong basin There will be a great uncertainty if we use the relationship of porosity versus depth of drilled wells in uplifted and eroded prospects to predict that relationship for undrilled prospects of which the uplift and erosion are unknown A combination of seismic data and surrounding well data could help minimise the uncertainty in predicting the relationship of porosity versus depth in the undrilled prospects That approach was presented in this paper and applied to Middle Miocene reservoir of prospects KL and D in North Song Hong basin 16 Ilu nil-so 4/2013 ... Oligocen va Miocen Bay dit d i tudi Oligocen t i p trung d sUdn phia Tay eua bdn trung, la noi dat da tudi Miocen bj bao mdn eit gpt manh bdi nghich dio kien tao eudi Miocen Bay dat d i tudi Miocen. .. Bay dat d i tudi Miocen t i p trung d trung t i m bdn trung, la noi dat da Miocen bj nghjch dio v i bio mdn it Do viy, bay tap trung chu yeu d cae dat d i tudi Miocen, cdn Oligocen thudng rat... 3.500m v i lac quan hon la den 4.000m Tat c i eae t i n g chifa cua elu tao KL d i u cd tudi Miocen trung hoic trd hon, dd di/ doin lac quan l i cd co sd Idemitsu Final well report (Geology) W2-HD-IX