Hdi nghi Khoa hgc vd Cdng nghe Biin loan qudc Idn^ thd [ PHAT TRIEN HE THONG DUY TRI AP SUAT VIA CAC MO DAU KHI THUOC LIEN DOANH VIET NGA VIETSOVPETRO Vu Quoc Tuyen, Le Nhat Tuan, Vu Lc Trung, Nguyen Cong Hieu Lian doanh Viet Nga Vietsovpetro 105- Le Loi, Phuong 7, t/p Vung Tau, Ba Rja Vung Tau Email: tuyenvq.rd@vietsov.com.vn Tom tat: Bain ep nude tri dp sudl via nhdm muc dich ndng cao he sd thu hdi ddu Id mgl cdc phuang phdp ca bdn dang dugc dp dung a Lien doanh Viet Nga Vietsovpetro Phuang phdp ndy dugc hdt ddu tien hdnh lir ndm 1987 cho ddi tugng Mioxen dudi mo Bgch hd mot ndm sau md rdng cho cdc tdng oligoxen dudi rdi den than ddu dd mdng den phdt trien hdu khdp Iren cdc mo ddu thugc Lien doanh Viet Nga Vietsovpetro (Hinh Sa kel ndi he thdng tri dp sudl via cdc md ihugc Lien doanh Vietsovpetro) Nhd linh todn khoa hgc, irien khai hgp ly vd Ihuc hien lot cdc yeu cdu phdt trien md nen he thdng tri dp sudt hdng bam ep nude da phdt huy tdi da lac dung Tinh den thdi diem 01.01 2011 theo linh todn sa cdng nghe 1998 he sd thu hdi ddu Id 17% nhung thuc te Id 23-32%, sdn luvng ddu khai thdc cong don ke tit bdt ddu khai thdc la 189.9 trieu tdn, da bom ep vdo via vai khdi luang mrdc dd duac xir ly Id 263,3 trieu m vd dua ve ba 22 387,26 trieu met khoi dot ENHANCE AND MAINTAIN THE RESERVOIR PRESSURE IN OIL AND GAS FIELD OF J V VIETSOVPETRO In order to maintain the reservoir pressure and enhance the recovery factor, water injection method has been employed by Vietsovpetro over the past years This method was first used in 1987 for targets in lower Miocene in Bach Ho field One year later, it was utilized in lower Oligocene layers and then reservoirs in the basement Nowadays, the method has been widely applied in almost all oil & gas fields operated by Vietsovpetro (Figure Scheme of the apparatus for maintaining reservoir pressure in Vietsovpetro's fields) Thanks to scientific calculation, reasonable implementation and adherence to the reservoir development requirements, the apparatus for maintaining reservoir pressure by water injection has been optimized Until 01.01.2011, according to the data of the 1998 technological scheme, the recovery factor is n% but the real factor is 23-32% instead; the accumulated production of oil since production commencement is 189.9 million tons; 263,3 million cubic meters of processed water have been injected and 22.387,6 million cubic meters of gas have been transported onshore ,jfr Irinh, Vdn tdi vd Cdng nghe BiHn 303 Nguon nude bo"m cp Nude biin thim luc dja Viet Nam duge sir dung vao muc dich bgm ep via tri ap sual va dugc idy lir sau 25m Cac mau nude duge lay idy tit dp sau d khu vuc STK2 md 13ach hd va eac mau nude lay tir phin loc tinh d Id hgp may bgm BM duge giri vi phdng thi nghiem nude Vien NlPl phan tich Kit qua phan lich cac mdu dugc dua bang rheo ket qua phan tich, nude bom ep sau xu ly dap ijrng cac yeu cdu lieu chudn ki thuat de va ehg thay nhirng dac linh hda ly cita nude biin va nude bom ep (da dugc xu ly) khdng khac Nude biin dau vao va nude biin da dugc xir Iy hdu nhu hoan loan sach ( mirc chira tap chdt co hge chi tu 0,2 mg/1 den 0,4 mg/I) dap img yeu cdu vi chat lugng cua nude bgm cp (khdrig ldn hon mg/1) Nhung, di chuyin trgng cac dudng ong, nude bgm ep bj nhiem ban va tai mieng giing bgm ep dd nhiem bdn cua nd cd the dal tdi mg/1 (gidi han cho phcp) Bdng Cdc ddc linh hod ly sinh cita mrdc biin vd nuac bam ep Sd TT 10 11 12 13 14 15 16 17 18 19 20 21 Nude bien d STP-2 Idy tir Nude bom ep BM dd sau 25 m 40000 sau xir ly Mau sac Khdng mau Khdng mau Khdng Mill Khdng Ty trong, g/cm"* 1,023 1,023 7,7 pH 8,1 19104 18980 Cr, mg/1 S04'",mg/1 2611 2518 HCOj', mg/I 134 157 COj^', mg/I OH", mg/I 0 S ~ , mg/1 11268 11270 Na* +K*, mg/I 406 363 Ca**,mg/I 1286 1249 Mg"*"*, mg/1