Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Ho" NGUYEN L? OI^U CHINH QUA TRINH KHAI THAC VIA DAU M 6 N G M 6 BACH H 6 TREN CO sd PHAN TfCH OONG THAI BI^N O6 I CAC THONG S 6 LAM viec cCiA GI^N[.]
Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Ho" NGUYEN L? OI^U CHINH QUA TRINH KHAI THAC VIA DAU M N G M BACH H TREN CO sd PHAN TfCH OONG THAI BI^N O I CAC THONG S LAM viec cCiA GI^NG KHOAN Phung Dinh Thuc Cong ty Tham Khai thac Dau Mai Van Du Cong ty dau Viet - Nga • Nhat ABSTRACT The application of some methods to analyze the changing dynamic of well's pedormance parameters in the Bach Ho Basement resen/oir's development process such the Spearman's correlation analysis, analysis of Gini's coefficient and Entropi's analysis shows that they are adequate and convenient to diagnose the process occurring inside the resen/oir the state and efficiency of the resen/oir's development process The results of the research allow authors offer the principle to adjust rationally the resen/oir's development process for reaching the high its efficiency and improving the oil recovery of this resen/oir LMdoAu Trong nhung nam vUa qua viec lua chgn nguyen ly dieu ehinh qua trinh khai thac via dau mdng md Bach Ho gap nhieu trd ngai nhung nguyen nhan sau; - Tinh bat ddng nhat cao eua cac tinh chat tham ehCra theo dien tich cung nhu mat eat vdi tinh phCrc tap cua cau true khdng gian rdng - Tinh phuc tap eua dac tinh bao hoa luu the via cac khdng gian rdng Khdng xac dinh rd rang md hinh ddng chay thuy luc via vi tinh bat ddng nhat cao cua cau true khdng gian rdng cung nhu luu the via va tdn tai nhieu hieu urng phu via nhu hieu Ung phi can bang tham chi ca hieu Crng thuy trieu - Han che thdng tin ve mat sd lugng cung nhu chat lugng cac lan tien hanh nghien eCru thue dia - Chua cd nhung kinh nghiem khai thac cac via dau tudng ttr Chinh vi vay, tac gia lua chgn mdt sd phuang phap cho phep phan tich cac didn bien xay he thdng via bing viec xCr ly eae thdng tin gian tiep de tiep can nhu luu lugng chat Idng eae gieng khoan eua ca via, hay mdt vung ea biet eua nd [1, 2, 4, 8, 10, 11, 12, 13] Cac phudng phap phan tich tuang ho Spearman, he sd Gini, Entropi da dugc ap dung de chan doan trang thai va dua nguyen ly dieu chinh qua trinh khai thac via dau mdng md Bach Hd II PHAN TfCH SONG H A N H O O N G THAI BI^N O | ENTROPI VA HE S GINI QUA TRlNH KHAI THAC VfA DAU MONG M BACH H Nhung nam g i n day, viec phan tich ddng thai bien ddi Entropi va he sd Gini dugc nghien eCru ap dung thu eho hang loat eae md dau eua bien Bae thudc Cdng ty BP hay Statoil cung nhu md Bach Hd va cho nhieu ketquakhaquan[2, 4,10,11,13] Oe danh gia hieu qua qua trinh khai thac via dau mdng md Bach Hd, tac gia tien hanh phan tich ddng thdi ddng thai bie'n ddi he sd Gini, Entropi ket hgp vdi phan tich ddng thai bie'n ddi tdng san lugng khai thac diu va bam ep nuge eua toan via, khdi Trung tam va cac khdi phia Bae Ket qua nghien eUu cho thay dac thu eua qua trinh khai thac via dau dugc the hien rd net qua ddng thai he sd Gini cung nhu Entropi eua nd Viec ap 211 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Ho" dung cac phuang phap phan tich tren ed the giai quyet tUdng ddi tin cay mdt sd nhiem vu chan doan trang thai khai thac via dau nhu sau: Phan chia qua trinh khai thac via diu eae giai doan khae de lua chgn chien luge khai thac diu thich hgp eho mdi giai doan dd Phat hien tinh mat dn dinh va trat tu eua qua trinh khai thac ma nguyen nhan ed the san lugng khai thac chat Idng tU via vugt qua gidi han tdi uu, ap suat via vugt ngoai gigi han tdi uu, su dao ddng manh san lugng khai thac chat Idng hang thing tU via, tinh bat ddng nhat cao eua cac tinh chit thim ehUa eua via - Oanh gia hieu qua qua trinh khai thac via ndi chung cung nhu eae bien phap da ap dung de dieu ehinh qua trinh ndi rieng - Oanh gia tuang ddi mCre san lugng khai thac tdi uu hang thing cao nhat cho toan via cung nhu mdt vung nao dd eua via ma che day diu ddng deu bing nude bam ep khdng bi xao trdn Che dp khai thac dn dinh ed trat tu eua via diu se bi pha vd neu san lugng khai thac hang thing vugt qua mUe Cu the, theo danh gia cua tac gia mUe khai thac dau tdi uu cao nhat eua khdi Trung tam vao khoang 85-90 va eua eae khdi phia Bic 5-6 dan vi Theo ket qua phan tich, che dp khai thac diu dn dinh va ddng deu ddi vdi khdi Trung tam tuang duang vdi khoang bie'n ddi he sd Gini tu 0.3 den 0.35 va cac khdi phia Bae tU 0.4 den 0.47 vdi dieu kien Entropi eua chung bie'n ddi dn dinh Che dp khai thac dau khdng dn dinh eua khdi Trung tam va eae khdi phia Bic tuang duang vdi he sd Gini tuang ung eua chung Idn han 0.37 va 0.5 Cin phai nhin manh ring, viec chuan doan qua trinh khai thac via diu bing he sd Gini va Entropi khdng nen ehi dua vao mdt tieu ehi gia tri tuyet ddi ma edn phai di/a vao dac thu dao ddng eua eae gia tri Che dp khai thac khdng dn dinh eua via eOng tuang ung vdi giai doan ed su dao ddng Idn hoae too dp tang cao eua he sd Gini va Entropi Op tin cay eua viec phan tich ddng thdi he sd Gini va Entropi se cao han phan tich rieng le chung vi day la nhung phuang phap bd trg eho Neu nhu phan tich Entropi nhay cam han viec phan chia toan bd qua trinh khai thac via eae giai doan khae de lua chgn chien luge khai thac thich hgp cung nhu viec phat hien tinh mit trat tu, khdng dn dinh eua qua trinh khai thac lien quan den viec bam ep nude khdng ddng deu theo dien tich, san lugng nude bdm ep hang thing dao ddng manh va ap suit via giam dudi mCre tdi uu thi he sd Gini lai nhay cam han muc bu trU khai thac diu bing bam ep nude cao hay thip qua, ed qua trinh phan bd va td ehUe lai eua he thdng chat Idng via eOng nhu san lugng khai thac va bam ep nude hang thang vugt qua mUe tdi uu cao nhit lam xao trdn che day diu ddng deu bang nude bam ep via va nhu vay tinh hieu qua va he sd day diu bing nude eae khdi matrix se bi giam dang ke III PHAN TfCH TLTONG H SPEARMAN QUA TRJNH KHAI THAC VIA DAU MONG M BACH H Phan tich tuang hd Spearman da dugc Ung diing rdng rai khai thac diu de' xac dinh mdi lien he thuy luc giua eae gieng khoan cung nhu hudng ddng chay thuy luc via [1, 2, 4, 8, 12, 13] Odi vdi via dau mdng md Bach Hd, ma sd lugng nghien cuu giao thoa gie'ng, danh diu phdng xa cung nhu eae phuang phap true tiep khae dugc tien hanh vgi sd lugng han che va khdng lien tue thi viec ap dung phan tich tuang hd Spearman de ed dugc nhung thdng tin cin thie't ve mdi lien he thuy luc giua cac gie'ng khoan la rat can thie't Tie gia nhan thiy, viec phan tich mdi quan he tuang hd eho toan bd cac cap gieng khoan khai thac va bam ep nude theo ehi sd luu li/gng trung binh hang thang eho mdt sd giai doan khae eua qua trinh khai thac via dau mdng md Bach Hd eho ket qua tuang ddng vdi ket qua nghien eUu thue dia ve mdi lien he thuy luc giua cac gieng khoan va hudng ddng chay via bing eae phuang phap nghien cuu true tiep nhu nghien eUu giao thoa gie'ng, danh diu phdng xa [8,12,13] Viec ap dung phan tich tuang hd Spearman ddi vdi via dau mdng md Bach Hd cho phep ta cd dugc nhung thdng tin can thie't de giai quyet nhung nhung nhiem vu cu the nhu sau: 212 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Hd" - Xac dinh mdi lien he thuy luc giu'a eae gieng khoan - Xac dinh hudng van ddng eua nude bam ep va hudng ddng thuy luc via - Xac dinh tinh bit ddng nhat eua via dau theo dien tich, Phat hien cac gieng bam ep - "thu pham" chinh gay ngap nude eae gie'ng khai thac Phan chia cac gieng bam ep theo cac nhdm de ed the dieu ehinh lugng nude bam Cu the la nhdm cac gie'ng gay ngap nude ehinh eae gie'ng khai thac nhu B05, B55, B25 va B47, nhdm cac gieng ed tiem nang gay ngap nude cac gie'ng khai thac nhu B64, C14, C11, B36, B37 va nhdm eae gie'ng cd mdi lien he thuy luc thip vdi eae gie'ng khai thac (it cd nguy ed gay ngap nude cac gie'ng khai thac) nhuB27, B33, B52 IV NGUYEN LY OI^U C H I N H Q U A T R I N H KHAI THAC VIA DAU MONG M BACH H Tren ea sd ung dung cac phuang phap phan tich du doan tinh trang khai thac via diu mdng md Bach Hd da neu tren tac gia dua nguyen ly dieu ehinh qua trinh khai thac via dau theo trinh tu nhu sau: - Tren ca sd phan tich ddng thai bien ddi he sd Gini va Entropi eae khdi rieng biet cung nhu toan via dau danh gia qua trinh thu hdi chit Idng tU via ed hieu qua, dn dinh, trat tu hoae nguge lai - Neu qua trinh dang ed hieu qua thi giu nguyen che lam viec cac gieng khai thac eOng nhu bdm ep Neu qua trinh khdng hieu qua, mat dn dinh va trat tir thi tien hanh phan tich ddng thdi ddng thai bie'n ddi Entropi, he sd Gini vdi eae ehi tieu khai thac toan via (hoae cac khdi, vung rieng biet eua via) nhim tim nguyen nhan gay su mit dn dinh tren - Xac dinh bien phap can tien hanh de dieu ehinh qua trinh khai thac Mudn vay, tren ea sd nghien eUu tuang hd Spearman cung eae phuang phap true tiep nghien eUu xac dinh mdi lien he thuy luc giua eae gie'ng khoan (bam chit ehi thi, chit danh diu phdng xa, nghien cuu giao thoa ) phat hien dac diem lien he thuy luc giua chung vdi va phan chia eae gie'ng khai thac va bam ep theo nhdm de dieu chinh san lugng chit Idng khai thac cung nhu nude bam ep (han che hay gia tang san lugng theo dac diem mdi lien he thuy luc eCia chung) - Tien hanh dieu ehinh qua trinh khai thac theo bien phap da lua chgn - Oanh gia hieu qua qua trinh dieu ehinh tren ed sd phan tich ddng thai bien ddi Entropi, he sd Gini va phan tich eae ehi tieu khai thac via (hoae cac khdi, vung rieng biet eua nd) Neu viec dieu ehinh khdng hieu qua, tCre la qua trinh khai thac vin edn d che dp khdng dn dinh, thi tiep tuc tien hanh phan tich lai de lam rd them nguyen nhan va dua bien phap dieu ehinh tiep - CCr nhu vay theo quy trinh khep kin tren, tien hanh qua trinh phan tich danh gia trinh trang va dua bien phap dieu ehinh qua trinh khai thac via diu mdng md Bach Hd (Hinh 6) Kha nang dieu ehinh qua trinh khai thac via diu mdng md Bach Hd theo nguyen ly tren dugc kiem chCrng phan tich ddng thai bie'n ddi he sd Gini va Entropi qua trinh khai thac khdi Trung tam giai doan tu 41999 den 4-2000, nhat la tU 11-1999 den 2-2000 chung tdi nhan thay ed su gia tang dot bien eua Entropi (tU 2.44 den 2.55 bit) va he sd Gini (tU 0.36 den 0.41) tCre la vugt qua mCfc che khai thac dn dinh ed trat tu da dugc xac dinh eho khdi (0.35) - (Hinh 1) Phan tich ddng thai bie'n ddi eae chi tieu khai thac eua khdi Trung tam cung xac dinh su gia tang manh phan tram nude dau khai thac (Hinh 2) Phan tich ddng thdi ddng thai bien ddi he sd Gini, Entropi va sd lieu nghien cUu dia chat thue dia eho phep chung tdi xac dinh md sd nguyen nhan gay mit dn dinh va xao trdn trat tu cua qua trinh khai thac nhu sau: - Cd su suy giam ap suit via xudng dudi mUc tdi uu ngoai khoang anh hudng ed ich cua hieu Ung phi can bang [6, 7] 213 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Ho' 0.55 2.8 -Gs 0.50 ^ i -F^ia^ 4/•V V if °-35- k ^ 0.30 - * 0.25 - r ^•'^ 3.2 3.0 2.8 26 2.4 2 7=: 20 'Q! O 18"^ LU 16 14 0.20 - % ^ 0.15 - 1.2 0.10 - 10 0.05 - 00 - 1I 08 06 Jan -90 Jan-91 Jan-92 Jan-93 Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Jan -02 Hinh Ddng thai bie'n ddi he sd Gini va Entropi cua cie khdi phia Bic via diu mdng md Bach Hd qua trinh khai thac 215 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Hd" Hnm liroiig uiroc/r 3C 2' 1C Jan-90 ^n-91 ^n-92 Jan-93 ^n-94 Jan-9 Jan-96 Jan-9 Jan- Jan-99 Jan-00 Jan-01 Jan-02 Hinh Odng thai bie'n ddi sin lugng diu khai thac, nude bam ep va ham lugng nude eua eae khdi phia Bae via diu mdng md Bach Hd qua trinh khai thie 370 360 26.0 25.9 330 320 310 300 25.6 25.5 25.4 25.3 25.2 25.1 25.0 24.9 24.8 24.7 ^ 24.6 £ 24.5 § 24.4 24.3 24.2 ^ 24.1 ^ 24.0 23.9 23.8 m O ^^^ 270 260 eJD 250 240 230 220 210 200 190 180 S 170 160 150 140 130 120 110 100 90 23.5 23.4 23.3 23.2 % ^ ' ^ ' ' ^ ' ' ^ ' ^ ^ ^ ' ^ ^ ^ ^ ^ ^ ^ ^ 60 50 Jan-95 22.9 22.8 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01 Hinh 5: Mdng md Bach Hd Bie'n ddi luu lugng khai thac diu mdt sd gie'ng trudc va sau giai doan dieu chinh qua trinh khai thac (02-04/2000) 216 Jan-02 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Hd " Phan tich ddng thai Phan tich dac diem hien ddi cac thdng so thiiy dgng luc He sd Gini Qua trinh khai thac on dinh co trat tu va hieu qua Cac thong so ciia qua trinh khai thac tiep theo Cac thdng sd ciia qua trinh khai thac via Entropi Qua trinh khai thac khong din dinh va hieu qua Phan tich tirong h Oieu ehinh -> Trd lai phan tich trang thai danh gia hieu qua qua trinh khai thac via cung nhu danh gia hieu qua viec dieu chinh va tiep tuc chu ky 217 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Ho" ^ Ap dung nguyen ly dieu chinh qua trinh khai thac via d i u theo chu trinh khep kin va lien tue nhu tren cd the gia tang san lugng khai thac eae gieng khoan va tri tinh ddng deu lien tiie eua qua trinh day dau bang nude bdm ep via nham dat dugc he sd thu hdi dau cao nhat TAI Lieu THAM KHAO MMp3afl>KaH3aAe A.X., Annee H.A., tOcud^aafle X.B v\ flp OparweHTbi paapaSoTKn MopcKnx HectJTeraaoBbix MecTopo>KfleHMi?i BaKy: nsflaTenbCTBO «3T1M», 1997-408 c Mnp3afl>KaH3afle A.X., OunnnnoB B.n., AMeiOB M.M CucreMHbie Meroflbi B HectDTefloSbiHe MocKBa, PMHTK «Hecf)TeoTAaHa», 1998-184 c MMp3afl>KaH3aAe A.X., MaivieflOB tO.r, LUaxBepflneB A.X MnpoBan npatanKa paapaSoTKH HecJDTflHbix MecTopoKfleHMi^ - A3ep6aiifl>KaHCKoe HecjDTaHGe xoaaMCTBO, No7,8.2000 - c37-43 Phung Oinh Thue va nnk Cdng nghe va ky thuat khai thac dau Nha xuat ban giao due Ha Ndi 1999 Phung Oinh Thue, Mai Van Du Kha nang dieu ehinh qua trinh khai thac via dau mdng md Bach Hd qua nghien eUu die diem bie'n ddi eae die tinh thuy ddng luc hgc Hdi nghi KH ky niem 20 nam lap XNLD Vietsovpetro va khai thie tan dau thu 100 trieu - Vung Tau nam 2001 HaH Jle floHr, Mail Ban 3bi npoMbicnoBbie nccneflOBaHUfl HepaBHoeecHbix ocpcjDeKTOB B npoqecce paapaSoTKn HecfjieraaoBbix MecxopoKfleHUM - A3ep6aMA>tKMAKOCTM saKaHKOM BOAbi B opouecce paapaSoxKn 3ane>KM d^yHAaivieHTa MecTopoKAeHUfl Benbiii Turp 06 Hayn jpyAOB" o n BbeTCOBneTpo, 2001 r Mai/i BaH 3bi, Hryen Hbbi H npuMeneHne KoppenflMnoHHoro anannaa Ana OMeHKn 3d)d)eKTMBH0CTM BOAHoro BOSAeMCTBMfl B TpeiAHHOBaTG-nopMCTbix KonneKTopax - A3ep6aMA>KaHCKoe Hec|)T5RHoe xoaflfiCTBO, N97, 2000 - c 37-43 Cao My Lgi, Mai Van Du Xu the bie'n dd he sd san pham cac gieng ting mdng md Bach Hd qua trinh khai thac Hdi nghi KHCN d i u khi- Ha Ndi nam 2000 10 MaweA-aaAe P.B., CyneMMaHOB A.A., KacpapoBa C.B npuweHeHne Koad^d^nMneHra A>tKaHCKoe Hed^iflHoe X03?1MCTB0».- 1999.-No 11.-C.10-12 11 HryeH Hbbi 14, Jle Bbei Xa\A flMarHOCTupoBaHne cocTOflHun paapaSoTKH Tpeu^MHOBaTO-nopucToii 3ane>Kn npuMeneHneM KoadDdDnm-ieHTafl>KHHM.- Aaep5ai?iA>KaHCKoe HedDTflHoe xoaflMCTBO, No7, 8.2000 - C43-46 12 OyHT fluHb TxbiK, Mafi Ban 3bi, HryeH Hbbi M npuMeneHne KoppenflMnoHHoro anannaa p,n9\ onpeAeneHMfl n AnarHOCTupoBaHna cocTOflHUfl paapaSoTKn aane>KM HecjDTH dDyHAaMenra MecTopoKAeHMfl BeribiM Turp Teancbi AOKnaAOB MexKaHa, BaKy 2000 13 Oynr fluHb TxbiK, MaM Ban 3bi ynpaBnenne npoqeccoM paapa5oTKM 3ane>KeM Hedpjv\ c TpeujuHOBaTOnopucTbiMn KonneKTopaMM na ocHOBe AHHaMUMecKoro noxoAa - Aaep6ai;iA>KaHCKoe HectDrnHoe xoafliiCTBO, 2001 218 ... khoan, ed nghla la ed su xao trdn che day diu ddng deu bang nude bam ep via diu Nhu vay nguyen ly dieu ehinh qua trinh khai thac tren ea sd phan tich ddng thai cac thdng sd khai thac gie''ng khoan. .. He sd Gini Qua trinh khai thac on dinh co trat tu va hieu qua Cac thong so ciia qua trinh khai thac tiep theo Cac thdng sd ciia qua trinh khai thac via Entropi Qua trinh khai thac khong din dinh... lien he thuy lire gitra cac gieng khoan I Dieu ehinh qua trinh khai thac theo hien phap lira chon Phan nhom cac gieng khoan de tien hanh dieu chinh san luong khai thac cung nhir hom ep hoae tien