Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu mo Bach Hd'''' MOT s6 GIAI PHAP CONG NGHE VA K? THUAT GOP PHAN NANG CAO SAN Ll/ONG GÎ NG DAU VA HE S6 THU H 6 | DAU M 6 BACH H 6 Phung Dinh Thi/c Cong ty Tha[.]
Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu mo Bach Hd' MOT s6 GIAI PHAP CONG NGHE VA K? THUAT GOP PHAN NANG CAO SAN Ll/ONG GI^NG DAU VA HE S6 THU H | DAU M BACH H6 Phung Dinh Thi/c Cong ty Tham & Khai thac Dau ABSTRACT Bach Ho oil field is classified as the world large oil fields with two specific characteristics: (1) oil is in granite basement and (2) high paraffin oil From these specific characteristics, in order to enhance oil recovery, it is extremely important to study and propose technical and technological solutions In this paper the author presents six (06) technical and technological measures in attempt to enhance well ultimate recovery and overall recovery factor of the field Md dau Bach Hd thudc loai md ed tru lugng Idn tren the gidi vdi hai dac trung ca ban: Dau chua da mdng va dau nhieu parafin Vdi tru lugng dau - hien cd, tu hai dac trung ed ban tren, viec nghien cuu de eae giai phap edng nghe - ky thuat dung nham nang cao he sd thu hdi dau ed y nghTa dac biet quan trpng, Trong bai bao tac gia trinh bay cac giai phap chu yeu ve edng nghe - ky thuat gdm sau diem nham gdp phan nang cao san lugng gieng dau va he sd thu hdi dau toan md, I DUY TR] AP SUAT VIA, KI^M SOAT VA OI^U KHI^N QUA TRJNH BOM ^P NL/CJC - KHAI T H A C VIA DAU De tri ap suat via dau Bach Hd, XNLD Vietsovpetro da ap dung bien phap bam nude vao tat ca eae tang san pham, dd, quan trpng nhat la viec tri ap suat via, kiem soat va dieu khien qua trinh khai thac dau - bdm ep nude vao tang mdng Qua trinh bam ep nude tri ap suat via tren tang mdng dugc bat dau thuc hien tu nam 1993, Bleu dd thay ddi ap suat via tang mdng trung tam Bach Hd dugc trinh bay tren Hinh 1, MO BACH HO, TANG MONG KHOI TRUNG TAM 400 BIEU DO THAY DOI AP SUAT VIA TRONG QUA TRINH KHAI THAC 160 380 Hinh 1: Bieu dd thay ddi ap suat via qua trinh khai thac 14 180 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu mo Bqch Hd " Rd rang tri ap luc vi'a da gdp phan quan trpng tang luu lugng cac gieng, dn dinh ti sd - dau, va dac biet la dn dinh san lugng dau khai thac TU thuc te khai thac dau Bach Hd cung nhu eae md khae tren the gidi, cho thay edng cua qua trinh tri ap luc via phu thudc rat Idn vao viec kiem soat va dieu khien qua trinh bam ep nude khai thac dau Muc dich cua dieu khien qua trinh bdm ep nude - khai thac dau la tang he sd bao trum cua nude bdm ep, tang he sd quet day dau, keo dai thdi gian khai thac cac gieng dau khdng bi ngap nude va eudi cung la tang he sdthu hdi dau De dieu khien qua trinh bam ep nude - khai thac dau, trudc het can tap trung kiem soat qua trinh bam ep nude ma thuc chat la kiem soat su chuyen ddng cua ddng nude bam vao vi'a Ndi dung chu yeu cua qua trinh dd la tien hanh kiem tra va phan tich thudng xuyen trang thai ngap nude bang cac phuang phap true tiep (lay miu, gay nhieu thuy luc va thir giao thoa, danh dau phdng xa, chat chi thi mau, phan tich vi lugng) va gian tiep (ap dung cac thuyet entropy, tu dieu chinh, fractal, isoeor, phan tich tuang hd spearman, phan tich he sd gini, v.v,,.).Xem Hinh 2^8 2.6 2.4 2.2 2.0 1.8 ^ 'Q 1.6 c UJ 1.4 1.2 1.0 0.8 I I I I > i I I > i* 0.00 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 bien ddi he sd Gini va Entropi cua khdi Trung tam via dau mdng md Bach Hd qua trinh khai thac Ket qua tdng hgp eae phudng phap tren se cho ta mdt btre tranh thuc, tdng the ve ddng thai cua qua trinh khai thac dau lam ca sd tin cay de dieu khien qua trinh khai thac dau, bdm ep nude vdi viec ap dung cac bien phap sau: - Bam ep vao phan dudi ngap nude cua than dau mdng, cac trudng hgp cu the cd the ap dung tUng phan cho than dau Mioxen dudi va Oligoxen dudi, dam bao ap suat day cao han ap suat bao hoa Cu the la ddi vdi dinh mdng Bach Hd (tai 3050m), de dat dugc he sd san pham cao nhat, can tri trudng ap xuat d mUe 1,05 ^ 1,1 P.bh (ap suat bao hoa) Khi dd, ap suat via trung binh cua toan bp vung nudi cap cac gieng khai thac se bang 1,2 ^ 1,25 P.bh, va ap suat via tai chieu sau 3850 m se bang , ^ 1,45 P.hb 15 Hoi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bach Hd" - De tang he so he sd thu hdi dau ddi vdi cac ddi vi nut ne can dieu ehinh trudng ap suat via theo chu ky tir tdi da den tdi thieu cho phep va nguge lai Cu the, tai dinh mdng cho ap suat giam xudng bang 1,05 P.bh sau dd tang nhanh len 1,1 P.bh; tai chieu sau 3850 m giam xudng 1,35 sau dd tang nhanh den 1,45 P.bh Viec tri ap suat theo chu ky dd se tam thdi pha vd trang thai can bang, tao hieu ung xung ap suat lam tang tinh chat thuy ddng luc cua mdi trudng matrix va tang cudng chuyen ddng dau tU mdi trudng matrix vao he thdng nUt ne; sau dd lai tiep tuc bam nude tang cudng nham tang he sd quet dau va eudi cung la tang he sd thu hdi tu cac ddi vi nUt ne - Dich chuyen tuan tu eae khoang khai thac tU dudi len tren d cac gieng khai thac da mdng Viec bam ep de tri ap suat via can phai dugc tien hanh tU phia day via vdi viec day dau ddng deu tU phia dudi (vung cd mCre dp the hien hieu irng phi can bang thap vdi Pv > 1,4 P.bh) len tren (vung cd mUe dp the hien hieu ung phi can bang cao vdi Pv < 1,4 P.bh) de tan dung tdi da nang lugng phat sinh cua hieu ung phi can bang viec gia tang hieu qua cua qua trinh day va quet dau len tren - Dieu ehinh ap suat day cua mdi gieng bdm ep va khai thac theo thdi gian, dam bao ranh gidi dau-nude dich chuyen dn dinh, tranh tao cac "ludi nude" bang each han che gradien thuy ddng luc nhd han gradien trpng luc ddi vdi da mdng - Bang phuang phap phan tich tuang quan, xay dung "Bleu dd ddng tuang quan"(isocor) de bleu thi muc dp anh hudng cua quan he nhan qua giua cac gieng bam ep nude va cac gieng khai thac dau (Hinh 2) Tren cd sd dd, tang cudng bam ep va khai thac eae gieng d vung ddng tuang quan thap de tang he sd tuang quan cua cac gieng vung len trung binh, giam he sd tuang quan d vung ddng tuang quan cao xudng trung binh de du tru nang lugng via, tao dieu kien dn dinh ranh gidi dau nude, nang cao hieu qua khai thac bam ep thudc vung tuang quan cao nhung khdng giam khdi lugng khai thac cac vung cd mat dp tap trung cao cac dudng ddng tuang quan ed the khoan them gieng khai thac d vi tri thich hgp [6,8,9] - Ap dung edng nghe mdi viec phat hien va ngan each khoang nude cac gieng khai thac nham tan khai thac dau cac phan than dau chua bi ngap nude - Thiet ke du sd lugng cac gieng khoan bam ep nham dam bao giu ap suat via, han che thap nhat su hinh cac "ludi nuge" Chuan bi ca sd ky thuat edng nghe de tien hanh khoan cac gieng khoan song than va da than - Ap dung nguyen ly dieu chinh khai thac vdi dau mdng md Bach Hd theo chu trinh khep kin lien tuc: Phan tich trang thai, danh gia hieu qua qua trinh khai thac via -> Tim nguyen nhan gay mat dn dinh va thieu hieu qua -> Dua bien phap dieu ehinh -> Dieu ehinh -^ Trd lai phan tich trang thai danh gia hieu qua qua trinh khai thac via va danh gia hieu qua viec dieu chinh -> tiep tue chu ky - Vdi than dau da via, tham chua khdng deu can nghien cUu dieu ehinh hudng ddng tham Ipe bang nut hoa hpc - Ddi vdi than dau Mioxen dudi va Oligoxen dudi, eae bien phap dau tien de nang cao he sd day dau de nghi ap dung la: Sir dung tac ddng bang hon hgp - nude vao via cd dung ddng hanh hoae tien hanh bdm ep dung dich hoat tinh be mat hoae hgp phan cua nd dang tao nut II HOAN T H I $ N M A N G LL/CJI PHAN B G I ^ N G KHAI THAC BANG V I $ C KHOAN B SUNG GI^NG DL/PHONG TC;CAC GIAN N H E BK ( O O N G MCJI HOAC HOAN CAI) VA KHAI T H A C G I ^ N G Q U A THAN THQ HAI Qua trinh tham dd phat trien md Bach Hd, dac biet la tang mdng cho thay tinh ddng nhat cua cac tang san pham thap; mang ludi phan bd gieng d mdt sd khu vuc tuang ddi thua Nhung dieu kien tren la nguyen nhan hinh cac vung via dau bi cd lap ma mang ludi gieng da thiet ke khdng khai thac dugc 16 /A^ [:K!IOr HOCVAKVTfM.iATi \l Tt?UNG LfON>5,- ij Hdi thdo khoa hpc "Ndng cao he sdthu hdi ddu md Bqch Hd' De tan thu dau tu cac vung bi ed lap nhu tren, can tien hanh khoan them cac gieng du tru hoae eae gieng phu trg cho eae gieng dang ed theo thiet ke Cac gieng bd sung dugc khoan tU eae gian nhe ddng mdi, hoan cai va mdt sd tai MSP nai cd du dieu kien ky thuat Ddi vdi cac md giai doan hai cua qua trinh phat then nhu md Bach Hd, day la bien phap tdi quan trpng de tri nhip dp khai thac [11] Tren ca sd xem xet cac tai lieu khao sat dia vat ly thuy ddng hpc xac dinh vung ngap nude va vung dau ed lap, cac bien phap sau se dugc tien hanh: - Cd lap tap ngap nude - Khoan than thir hai - Khoan gieng thCr hai thay the Trong dd, bien phap ke tiep dugc tien hanh neu bien phap trudc khdng kha thi hoae khdng cho ket qua III A P D U N G M A N H CAC BIEN PHAP KHAI T H A C THCTCAP Ket qua thCr nghiem tren thuc te da chirng minh rang dieu kien cua md Bach Ho, phudng phap khai thac ca hoc gaslift la phu hgp va dap irng yeu cau ve cac chi sd kinh te ky thuat Mac du cd vdn dau tu ban dau kha cao, gaslift cd hang loat cac uu diem [2,3,4]: - Giai lam viec rdng tU 20-2.000 tan/ng; vdi san lugng thap hdn cd the ap dung gaslift theo chu ky - Cd the tu ddng hoa hoan toan qua trinh khai thac - Cd the ap dung cho moi gieng cd dp sau, dp cong, nhiet dp day gieng bat ky, - La phudng tien tdi uu de gpi ddng va lam sach gieng sau khoan hoae sira chua - Thdi gian giua hai lan sira chua Idn (3-4 nam), mpi thao tac sira ehUa khdng ddi hdi nang bd can; ed the tien hanh cac bien phap xCr ly day gieng, khao sat, v.v ma khdng can keo tha bd can khai thac cung cac thiet bi ngam Trong giai doan den 2005, mdt bien phap quan trpng la tiep tuc qua trinh chuyen ddi gieng sang che dp khai thac bang gaslift, dd cd ca gieng tren vdm Trung tam va vdm Nam tang mdng Bach Hd (tren cac gian nhe BK) vdi tien dp nhu sau: Nam Sd gieng gaslift (edng ddn) San lugng khai thac bang gaslift (tan/ng) \ 2001 2002 2003 2004 2005 69 72 90 95 99 5239 5828 8314 8003 7826 Tat ca cac gieng mdi hoae gieng dua vao khai thac sau sura chua se dugc trang bi sin cac van gaslift Sau giai doan tu phun viec chuyen ddi sang gaslift se de dang khdng ddi hdi sura chua gieng, bao toan dugc vung day gieng khdi bi nhidm ban, nang cao dugc san lugng gieng Ddi vdi cac gieng gaslift bien phap quan trpng nang cao hieu qua la thudng xuyen kiem tra va dinh che dp lam viec tdi uu cho mdi gieng nham tang san lugng dau, giam tieu hao IV AP DUNG CAC BI$N P H A P T6NG HOP X(J LY V O N G C A N O A Y GI^NG - De dam bao gia tang san lugng khai thac dau, ngoai nhiem vu dua cac gieng mdi cua md vao khai thac, viec ap dung cac phuang phap tang san lugng bang each tac ddng len vung lan can da^ mdt giai phap thudng xuyen \ YV£,^ VIET NAM _O.Q_ THlI VIE (^ Hoi thdo khoa hoc "Ndng cao he sd thu hoi ddu md Bqch Ho" Tai XNLD Vietsovpetro, tren ca sd dieu kien dia chat, ky thuat cu the nhung nam tiep theo edng nghe xu ly vung can day sau day dugc de xuat ap dung[12]: IV.1 X\i ly axi't ket hdp vcfi hoat chat be mat, bcfm rCra vung can day Day la edng nghe xu ly ed hieu qua kinh te ky thuat cao nhat cac bien phap xCr ly LCDG, vdi axit chu ye'j dugc dung la HCL va HF Tuy nhien, edng nghe edn mdt sd nhugc diem, dac biet la tang mUc dp an mdn tniet bi, vi vay can tiep tue nghien ciru khae phuc theo hudng bd sung hoa cac Uc che an mdn, cac chat hoat tinh be mat dung dich xu ly Mat khae, de khae phuc nhung nguyen nhan gay nen anh hudng xau tdi dp tham thau vung LCDG sau XLf ly, tiep tuc hoan thien phuang phap xCr ly theo nhung hudng nhu sau: * Thao rCra nhanh cac san pham phan irng xir ly axit nha hon hgp hoa pham bi phan giai Tai nhung nai chua ed he thdng khai thac dau bang gaslift, qua trinh gpi ddng sau sua chua gieng va cung XLT ly vung LCDG thudng lam cham qua trinh thao rCra tU via day gieng nhung san pham phan ung sau xO ly axit Vi le dd, can ap dung giai phap khai thdng gieng sau xu ly vung LCDG nhd hdn hgp hoa pham bi phan giai dudi tac ddng cua nhiet dp via cao (> 80°C) tao mdt khdi lugng Idn tra Nj Phuang trinh phan Crng cua hdn hgp hoa chat xay nhu sau: XPi + XP2 —-^°°^ > NaCI + H2O + N j t San pham sau la mudi hoa tan nude va dudi tac ddng cua chenh ap Idn tao su phan giai hdn hgp hoa pham cung vdi khdi lugng Idn tra (Nj) se bi day day gieng va dugc dua len khdi mieng gieng mdt each de dang, Tai nhung nai da cd he thdng gaslift, xd ly ngoai axit edn ed the gpi ddng bang gaslift * Giai phap nhu twang - dau - axit Ban chat cua giai phap la: Dung dich xCr ly ngoai axit edn ed dau va dudi dang nhu tuang Nhu dau - axit se lam giam be mat tiep xuc giua axit vdi dat da vdng ngoai va tao dieu kien hon hgp di sau vao via sau han so vgi hdn hgp axit binh thudng Ddng thdi, nhu tUdng dau- axit se lam giam kha nang an mdn kim loai cua axit De tang nhanh thdng via sau xCr ly, hdn hgp nhu tuang dau - axit edn them pha Giai phap nhu tuang - dau - axit dugc tien hanh bang each bam ddng thdi hoae ke tiep cac phan nhu tuang - dau - axit vao gieng xCr ly Ty le the tich cua eae phan va trinh tu bam nhu tuang dugc lua chpn cho dat dugc kha nang hoa ign nhat hdn hgp dung dich nhu tuang dau - axit va dam bao chac chan hon hgp nhu tuang - dau - axit xam nhap vao cac khe nUt cua via Nhu vay, d nhung ddi tugng xu ly ed ap suat via thap thi sau xu ly, vung LCDG dugc khai thdng manh va thao nhanh nhung chat gay ban va eae san pham phan ung tU via vao day gieng va theo san pham khai thac di len * Xir ly axit duai ap suat lan c6 chen ep propant (cat nhan tao) vai nong thap cho doi tugng mong nirt Trong qua trinh khoan, sua chua gieng va khai thac, dung dich set va cac tap chat lang dpng tao nhung mang bpc tren be mat khe nUt ne, Ngoai ra, ddi vdi cac gieng khai thac, theo thdi gian ap suat via giam dan lam cho cac khe nUt d vung LCDG ed xu hudng khep lai bien dang dan hdi cua dat da Ddi vdi eae gieng bam ep cac phan tu eUng chat Idng bam ep cd the lam bit eae kenh dan hoae nhung Idp set cac vi khe nUt va khe nut (chu yeu d phan dudi) duac khdi phuc lai gan nhu trang thai ban dau hoae md rdng them Sau dd, cac khe nut dugc chen ep bdi propant de khdi bi khep lai, Ngoai ra, cac chat gel san pham phan ung cua axit va chat ban dugc rua sdi manh bdi dung dich dudi ap suat cao, dugc day day gieng va dua len be mat qua trinh gpi ddng gieng, Cd che tac ddng cua xu ly axit dudi ap suat Idn cd chen ep propant vdi ndng dp thap d tang mdng va quy trinh cu the da dugc trinh bay rd edng trinh [5], • ' ' / ' 18 ^* ' ' , i; Hoi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Hd" IV.2 Cac bien phap phuc hoi va nang cao san liTdng gieng bang dung moi hoa tan Mdt nhung nguyen nhan lam suy yeu giam san lugng ciJa eae gieng la qua trinh ddng nhua va parafin nhiet dp va ap suat day gieng giam; su hinh nhu tudng ben vung va tang dp nhdt dau d vung day gieng Nhieu bien phap khae da dugc thCr nghiem de giai quyet cac van de neu tren dd cd bien phap XLf ly bang cac dung mdi hoa tan ket hgp vgi hoa pham pha nhu tuang Ket qua thi nghiem tren eae md hinh via phdng thi nghiem va thu nghiem thuc dia cho thay dung mdi hoa tan P-1 (Three-metilen clorua CICHj- CHj- CHj-CI, Di-mentin-bezon H3C -O - CH3) cho ket qua tdt Viec sir dung phuang phap tren ed the ket hgp vdi cac phUdng phap khae nhu xCr ly axit, vd via thuy luc de nang cao hieu qua khdi phuc san lugng gieng IV.3 Nut via thuy liTc ket hdp bdm chat chen khe nut Cdng nghe nut via thuy luc can tiep tuc hoan thien de ap dung tai VSP theo hudng ket hgp cac bien phap [5,11]: - NUt via thuy luc cd lua chpn eae tap cd dp tham thau nham can ddi profil ddng san pham tU via Bang bien phap he sd thu hdi dau se dugc cai thien ddi vdi cac gieng cd nhieu tap san pham khdng ddng nhat - NUt via thuy luc phai ket hgp vdi cac bien phap tri ap suat via - Cdng nghe phai dugc lua chpn cho tUng gieng cu the tren ca sd nghien ciru cau true dia chat, dac diem profil ddng san pham va cau true gieng khoan nham tranh eae su ed cd the xay V THL/C HIEN CAC BIEN PHAP XCT LY LANG DONG PARAFIN TRONG CAN N G KHAI T H A C Tai cac gieng dau cd san lugng nhd nhiet dp san pham tren be mat thap (28-3rC) thudng xay hien tugng lang dpng parafin can dng khai thac d dp sau 100-150m Hau qua la san lugng cua gieng bi giam, tieu hao gaslift tang, khdng van hanh dugc eae thiet bi Idng gieng De giai quyet nhung phire tap tren can ap dung cac bien phap sau [11]: - Bien phap nhiet: Bam rira bd can khai thac bang dau ndng tU eae gieng lan can - Ca khi: Lam sach bd can dng bang eae thiet bi ed hpc (thdng, nao) - Gaslift theo chu ky: Chuyen cac gieng gaslift ed san lugng thap sang hoat ddng theo chu ky chu ky nghi, dau tuvia dugc tich lai bd can dng den dp sau 700-1.000m vdi nhiet dp 100-110°C Khi muc dau dat dp sau da dinh gieng chuyen sang chu ky lam viec, dau dugc cao ap day len be mat vdi van tdc 6m/s (tUdng duang san lugng 180-200 tan/ng); vdi van tdc nhu vay, nhiet dp ddng dau dugc dam bao va parfin khdng ed dieu kien hinh bd can dng - Cac bien phap hoa hpc: Hoa pham dude bam vao ddng cao ap trudc di vao gieng Phan tir cua hoa pham dugc hap thu tren be mat cua tinh the parafin tren dng, ket qua la eae parafin bi ddng chay cudn len tren be mat Hoa pham dugc sir dung cho trugng hgp la hon hgp polyme va dung mdi gdc thdm VI HOAN T H I $ N H E T H N G XAY Dl/NG M Trong giai doan den 2005 cac cdng trinh Idn nhu gian ep via - 30.000 m^ gian CNTT-3, BK-7, BK-9 can dugc xay dung theo dung tien dp de dam bao edng suat xir ly dau, va nude bam ep via Cac cdng trinh khae can phai tiep tue hoan thanh: - He thdng dudng dng gaslift den tat ca cac gian nhe 19 Hoi thdo khoa hoc "Ndng cao he sdthu hdi ddu mo Bqch Ho' - He thdng dudng dng dau, den tU gian nhe den gian CNTT-3 - He thdng dudng dng nude ep via den tat ca cac gian nhe - Cai hoan he thdng cdng nghe cac gian MSP de dam bao chat lugng xu ly dau nude - Lap dat va dua vao hoat ddng eae UPOG tren cac BK-5, 8, - Trang thiet bi phan phdi gaslift tren eae gian nhe - Lap dat he thdng cap dien ngam 6KV dam bao nang lugng dn dinh cho cac gian nhe * Hoan thien cong nghe thu gom dau nham giam ap suat mieng gieng Cho tdi thdi diem hien nay, dang ton tai sd dd van chuyen san pham tU cac gian nhe theo cdng nghe da pha Vdi cdng nghe dd tdn hao ap suat tren dudng dng van chuyen la rat Idn din tdi phai tri ap suat mieng gieng tren cac gian nhe gidi han (40-60bar) [1,7,10] Vdi ap suat mieng gieng nhu vay, kha nang tang san lugng cac gieng dau bi gidi han Vi vay, giai phap cdng nghe la chuyen sang van chuyen mdt pha: Dau va phai dugc tach tren cac gian nhe va van chuyen dudng dng nhu cac pha rieng biet; vdi cdng nghe dd ddng thdi vdi viec thay ddi dudng kinh dng phu hgp, dac biet, doan dng tU mieng gieng den dng dung, tdn hao ap suat tren tuyen dudng dng van chuyen giam manh, cho phep giam ap suat mieng gieng tdi 20-25 bar, nghTa la san lugng dau tang len dang ke Theo tinh toan neu giam ap suat mieng gieng cac gieng tang phong hoa dugc 2-12 bar thi kha nang tang san lugng ehi rieng cho eae gieng BK-4, 6, la 1.600 tan/ng, neu giam 12-26 bar thi kha nang tang la 28.000 tan/ng Viec ling dung edng nghe van chuyen chat Idng mot pha neu tren ngoai tac dung giam ap suat mieng gieng ed cac uu diem sau: - Nang cao edng suat xCr ly cua gian CNTT-2 va cac MSP Theo thiet ke gian CNTT cd edng suat xir ly tdi da 15.000 tan/ng vdi dau thd, phan da dUde tach tai UPOG nen cdng suat XLT ly cua gian CNTT dugc nang len 20.000 tan/ng - On dinh eae thdng sd lam viec cua cac thiet bi edng nghe giam thieu cac xung dot ddng chay - Tan thu eae phan nhe dau, tang lugng LPG va Condensat thu dugc dugc tach true tiep tren gian nhe d dp cao 100-110°C K^T L U A N Xuat phat tU thuc tidn san xuat va dieu kien cu the cua VSP, tren ca sd phan tich khoa hpc, chung tdi neu len cac giai phap cdng nghe ky thuat gdm diem nham gia tang san lugng gieng dau va he sd thu hdi dau tai md Bach Hd, dd la: - Duy tri ap suat via, kiem soat va dieu khien qua trinh bam ep nude- khai thac via dau - Hoan thien mang ludi phan bd gieng khai thac bang viec khoan bd sung gieng du phdng tU cac gian nhe BK (ddng mdi hoae hoan cai) va khai thac gieng qua than thu hai - Ap dung manh eae bien phap khai thac thU cap - Ap dung cac bien phap tdng hgp xCr ly vung can day gieng - Thuc hien cac bien phap xij" ly lang dpng parafin can dng khai thac - Hoan thien he thdng xay dung md 20 Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Hd" Ben canh cac giai phap neu tren, mdt van de Idn dang dat trudc cac nha khoa hpc dau Viet Nam la yeu cau ve Idi giai cho viec thu hdi them mdt lugng Idn dau tU cac ddi vi nurt ne than dau da mdng Trong pham vi bai bao nay, tac gia neu len nhung y tudng vdi ndi dung chu yeu la tri trudng ap suat via d tang mdng vdi muc trung binh bang 1,2 ^ 1,25 P.bh (1,05 -^ 1,1 Pb.h tai 3050 m) ket hgp bdm ep nude theo chu ky thay ddi tU tdi da den tdi thieu cho phep va nguge lai de tao trang thai mat can bang tam thdi Trang thai dd se lam tang su chuyen ddng dau tu mdi trudng vi nirt ne vao he thdng nut ne, va sau dd, tiep tue dugc lugng nuge bam ep tang cudng quet, day len phia tren Td chCre va thuc hien tdt cac giai phap neu tren chac chan se mang lai hieu qua cao va gdp phan quan trpng de dat dugc muc tieu nang cao he sd thu hdi dau va dn dinh san lugng dau khai thac cua VSP nhung nam tgi TAI L I $ U THAM KHAO 1, Phung Dinh Thuc, Ha Van Bich Ap suat tdi han cua hdn hgp dau - - nude va che dp lam viec cua he thdng khai thac, thu gom, van chuyen dau Tap ehi Dau Ha Ndi Nol-1995 2, Phung Dinh Thuc Cau true thiet bi gieng dau chuyen sang khai thac bang gaslift Tai lieu hudng dan, VSP, 1998 (tieng Nga) 3, Phung Dinh Thuc, Tran Sy Phiet va nnk Dinh hudng ca ban cai tao he thdng thu gom d Bach Hd Ung dung phuang phap bang gaslift cac gieng dau Tap chi Dau Ha Ndi No2-1998 4, Phung Dinh Thuc, Le Ba Tuan, Cd sd khoa hpc lua chpn phudng phap khai thac ca hpc dieu kien md Bach Hd Tap ehi cdng nghiep dau khi, Adeebaijan No5-1999 (tieng Nga) 5, Phung Dinh Thuc, Duang Thanh Lam, Luu VTnh Hung Ca sd va cdng nghe nut via thuy luc - axit ddi vdi cac gieng thudc tang mdng md Bach Ho Tap chi Dau khi, Ha Ndi No4-1999 6, Tran Hong Phong, Phung Dinh Thuc, Danh gia, dieu khien qua trinh bam ep nude - khai thac dau tang mdng tam md Bach Hd bang phuang phap phan tich tuang quan Tap chi Dau Ha Ndi, No7-1999 7, Phung Dinh Thuc, Phuang phap tiep can mdi phan tich cac giao ddng cua hdn hgp dau Tap ehi edng nghiep dau khi, Adeebaijan Noi 1-1999 (tieng Nga) 8, Phung Dinh Thuc Cfng dung toan hpc khai thac dau tai them luc dia phia Nam Viet Nam Bao cao khoa hpc tai Hdi nghi toan qudc lan thir nhat ve ung dung toan hpc Ha Ndi 23-25.12.1999 9, Phung Dinh Thuc L/ng dung thuyet Fractal khai thac dau khL Bao cao khoa hpc tai Hdi nghi toan qudc ve Ung dung toan hpc Ha Ndi 23 -> 25-4-1999 va Hdi thao khai thac dau Bacu 12 -^ 15-12-2000 10, Phung Dinh Thuc Nghien cuu dac tinh ddng luc hpc cija he thdng khai thac dau tai them luc dia phia Nam Viet Nam, Tap chi edng nghiep dau khi, Adeebaijan No4-2000 (tieng Nga) 11, Phung Dinh Thuc, Duang Thanh Lam, Le Ba Tuan, Nguydn Van Canh Cdng nghe va ky thuat khai thac dau Nha xuat ban Giao due 2000, 462 trang 12, Phung Dinh Thuc, Duang Thanh Lam Hoan thien cdng nghe xCr ly vung can day gieng d tang mdng md Bach Hd Bao cao tai "Hdi nghi khoa hpc cdng nghe: Nganh Dau trudc them the ky 21" Ha Ndi, 2000 21 ... d vung ddng tuang quan cao xudng trung binh de du tru nang lugng via, tao dieu kien dn dinh ranh gidi dau nude, nang cao hieu qua khai thac bam ep thudc vung tuang quan cao nhung khdng giam khdi... mdt giai phap thudng xuyen \ YV£,^ VIET NAM _O.Q_ THlI VIE (^ Hoi thdo khoa hoc "Ndng cao he sd thu hoi ddu md Bqch Ho" Tai XNLD Vietsovpetro, tren ca sd dieu kien dia chat, ky thuat cu the nhung... phap khae nhu xCr ly axit, vd via thuy luc de nang cao hieu qua khdi phuc san lugng gieng IV.3 Nut via thuy liTc ket hdp bdm chat chen khe nut Cdng nghe nut via thuy luc can tiep tuc hoan thien