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Hgi nghi Khoa hgc ky'''' niem 35 ndm Vien Khoa hgc vd Cong nghe Viet Nam Hd Ngi 10/2010 XAY Dl/NG VA THlT NGHIEM CAC HE HON HOP CHAT HOAT DONG BE MAT/ PHOI T R O N VOI NANO SiOz PHUC VU TANG CUONG THU HO[.]
Hgi nghi Khoa hgc ky' niem 35 ndm Vien Khoa hgc vd Cong nghe Viet Nam - Hd Ngi 10/2010 XAY Dl/NG VA THlT NGHIEM CAC HE HON HOP CHAT HOAT DONG BE MAT/ PHOI T R O N VOI NANO SiOz PHUC VU TANG CUONG THU HOI DAU TAI MO DONG NAM ROIVG DESIGN AND EVALUATION OF SURFACTANT MIXTURES OR BLENDING WITH NANO SiOz FOR APPLICATION TO EOR IN DRAGON SOUTHEAST OILFIELD Nguyen Phu-gng Tung, Le Kim Hiing, Pham Duy Khanh, Le Thi Nhu Y, Van Thanh Khue va Nguyen Bao Lam, Vien Khoa hgc Vat lieu iTng dung, Mac DTnh Chi, Q 1, Tp Hd Chi Minh Tel: 848 38237927; Fax: 848 38236073; Email: nptuns(w,vast-hcm.ac.vn Tom tat: Nhdm phu yu bam ep tdng cirang thu hdi ddu (TCTHD) tgi cdc md xa ba, hi dung dich chdt hogt ddng bi mat (HDBM) phdi tiran^ hgp tdt vai nuac biin cd cirng cao, ddm bdo gidm sire cdng bi mat (SCBM) ddii-nuac hiiu qud, bin a nhiet via vd cd khd ndng cdi thien tinh dinh irat ddi vai nuac ciia dd dinh irat ddu ciing nhu it hdp phu len bi mat dd via De phuc vu cho du dn TCTHD tgi mdng md Ddng Nam Rdng (DNR), tir nhirng mdu chdt HDBM thuang mgi, cdc tdc gid dd sir dung cdc phuang phdp khdo sdt tinh tuong hgp, SCBM ddii-nirac vd ddnh gid bin nhiet mdi trudng via di lua chon cdc mdu phii hgp cho qud trinh tdi ini hda thue nghiim tiip sau Cdc he chdt HDBM tdi ini lAMS IAMS-M2 vd 1AMS-M2-P nhdn dugc dd cho gidm SCBM ddu-nuac tai vdi trdm Idn vd bin nhiet tdt nirac biin DNR Kit qud bam ip cdc dung dich ndy tren md hinh mdu loi nhdm TCTHD diiu kiin via DNR cho thciy hiiu qud cdi thien he sd ddy ddu dgt 7,2 - 7,8%o Trin ca sa cdc kit qud thu dugc, Xi nghiep Lien doanh Vietsovpetro (Vietsovpetro) da chdp nhdn de dua vdo thir nghiem bam ep TCTHD a quy md Pilot Ben cgnh dd, cdc tdc gid da chirng minh dugc cd mat cdc hgt Nano Si02(Si02NP) dung dich chira cdc chdt HDBM, hiiu irng hgp trdi xudt hien giiip gidm SCBM xudng gdn 10 Idn Nhirng kit qud ndy ma mot huang mai irng dung cdc hgt nano vdo TCTHD giiip gia tdng hieu qud ddy ddu vd an todn han vai mdi tnrang cho phep thay thi mot lugng chdt HDBM ddt tien bdng cdc chdt tu nhiin tir phdn huy sinh hoc Abstract: In order to serve as an injection agent for the enhanced oil recovery (EOR) in offshore oilfields, the surfactant solutions have to be able in good compatibility with high hardness brine, effectively reduced the oil-water interfacial tension (IFT), and thermostable in reserx'oir conditions The capacity of altering wettability of reservoir rock to medium or waterwet is also required for EOR solutions Among various cotnmercial surfactants, the authors have used the tests on compatibility, thermal stability and IFT reduction to select the necessary components for further experimental optimization peiformance The founded optimum solutions lAMS IAMS-M2 and IAMS-M2-P provided the capacity of the oil-water IFT reduction in several hundred times and excellent heat resistance The experiments of injecting theses solutions into core tnodels at Dra^ igon 11 Tieu ban: Khoa hgc cong nghe Bien ISBN: 978-604-913-01 5-1 Southeaster (DSE) reservoir conditions showed that the EOR efficiency increased in 7.2 - 7.8% Base on these results, the Joint Venture Vietsovpetro (Vietsovpetro) has accepted the systems for further field tests Furthermore, the authors have demonstrated that in blending SiOz nanoparticles (SiOzNP) and surfactant solutions, the strong synergistic effects appeared and IFT has reduced down nearly 10 times These results open up a new application of NP in EOR to increase efficiency, environment safety when allowed to replace a big amount of expensive surfactants by a natural and biodegradable material MddSu Tang cudng thu hdi dau (TCTHD) la mot ITnh virc rat quan trgng ciia cdng nghiep khai thac dau the gidi, dac biet hien va tuang lai, nhiing md dau cd the de dang khai thac dang can kiet ma chi phi de tim kiem va dua vao khai thac cac md dau mdi cang tdn kem, khd khan Trong nganh cdng nghiep dau mdi 35 tudi ciia nude ta, hudng nghien cim TCTHD hien dugc dat rat cap thiet, md dau Idn Bach Hd, md Rang Ddng da qua giai doan khai thac dinh cao, md Ddng Nam Rdng (DNR) cung giam san lugng va bom ep nude kem hieu qua vi dau cd nhdt cao Cho den nay, chua cd mot thir nghiem TCTHD dugc xem la cdng Do tat ca cac md dau ciia Viet Nam hien deu la nhirng md xa bd, via dau cd nhiet cao, nude bien bam ep cd cirng cao nen bat ky mot phuang phap nao dugc lira chgn, deu phai dugc trai qua nhiing quy trinh thir nghiem phii hgp, khd khan Dd chinh la nhung thir thach va ciing la sir cudn hiit ddi vdi nhdm Vat lieu phu gia dau va cac hgp chat trung gian - Vien Khoa hgc vat lieu ung dung qua trinh thue hien hudng ''Nghien ciru vd phdt triin cdc hi chdt hogt ddng bi mat phuc vu bom ep tdng cirang thu hdi ddii\ Mot sd cdng budc dau ma chung tdi se trinh bay bao cao ciing la mot phan ddng gdp cua cac nha khoa hgc Vien Khoa hgc va Cdng nghe Viet Nam cho su nghiep khai thac dau hieu qua va ben vung 1.1 TCTHD vd cdc ea che hoat dong cua phuang phdp bom ep chdt HDBM cac via chira dau sau dugc md, ap lire via, dau tu phun theo dng khai thac len den mieng gieng vao he thdng thu gom khai thac va day dugc ggi la giai doan khai thac so cap Trong giai doan nay, khai thac dugc khoang 5-15% lugng ddu tai cho (OOIP) vdi chi phi khai thac thap nhat Sau mot thdi gian khai thac, ap sudt via sut giam va khdng du vugt qua ap suat thuy tTnh de day dau len D I tri ap sudt via va quet ddu khdi cac bay chira, nude, hoi nude hoac hydrocacbon dugc bom ep vao via va day la giai doan khai thac thir cap hoac giai doan bom ep nude vi bom ep nude la phuang phap tri ap sudt via thdng dung va it tdn kem nhat Trong giai doan nay, cd thi khai thac dugc 30-50% OOIP Sau giai doan dinh cao, lugng dau khai thac sut giam va nude ddng hanh tang nhanh gieng khai thac, dan den tinh trang ngap nude, gilng ngirng hoat ddng Vi vay, san lugng dau giai doan khai thac thir cdp bat ddu sut giam, cac bien phap TCTHD phai dugc xem xet ap dung Dac diem ciia giai doan TCTHD la bam ep vao via cac luu chat ma tmdc dd khdng cd via nham thay ddi, cai tao mot sd dac tinh luu chdt via, tir dd cd thi thu dugc mot lugng dau niia, cho din 10% OOIP Cac luu chdt thudng dugc diing de bam vao via la: (CO2, N2), hai ndng, hoac cac dung dich kiem, polymer, chat HDBM [1] Md DNR d each Vung Tau hon 200 km Ddu dugc khai thac chii yeu tir tdng mdng da gdc dioritoir nirt ne, da rdng, da tham va nhiet via tuong ddi cao (9rC) Ddu mo DNR cd ham lugng nhua asphanten cao dan den nhdt cao, ty sd dau-nudc dilu kien via > nen nude day dau khdng hieu qua Vdi cac dac diem nhu vay, bom ep khd kha thi ve kinh te va cung se rat tdn kem bom ep polymer Vi vay, bam ep cac chdt 78 Hgi nghi Khoa hgc ky' niem 35 ndm Vien Khoa hgc vd Cong nghe Viet Nam - Hd Ngi 102010 HDBM la phuong phap dugc lira chgn dk nghien ciru va irng dung nham TCTHD tai mdng DNR [2] Dau bi giii lai via cd the dugc chia lam hai loai: dau luu nhirng viing dugc quet bdi nude bom ep va dau linh ddng nhiing viing khdng dugc quet hay nhiing vimg dugc quet rat it bdi nude bam ep [3] Yeu td quyet dinh TCTHD la hieu qua day dau khdi cac mao dan ciia da, dugc phan anh qua gia tri bao hda dau du Sdd d nhiing nai dugc tiep xiic vdi chat Idng bam ep Lire mao dan va lire nhdt (lire thiiy ddng) kiem soat sir phan bd ciia cac pha va su dich chuyen cua cac chat luu mdi tardng rdng, dd chi phdi he sd day dau vi md TCTHD nhiing via nirt ne tu nhien bang phuang phap bam ep chdt HDBM dua tren nhiing co che chinh sau: 1.1.1 Gidm dp luc mao ddn, gidm SCBM giira hai pha ddu nuac: De the hien tuong quan giiia hai lire chinh kiem soat qua trinh day dau via, lire nhdt va lire mao dan, ty sd giua chiing-sd mao dan Ne (Hinh 1.1) dugc dua [4]: VJU Lwc Nc Lwc mao ^ COS U d day, V va )i la van tdc va nhdt cua chat luu thay the, o: SCBM dau-nudc, 0: gdc dinh udt; AP/L : gradient ap suat theo chieu dai mao dan t o a \\ Xi,r n g m m a o d ^ n (Imbibition) P ' •o o ' ^V.^X- T h a o k h (X)rainage) Rl i.E4e 1.E-05 E •""JS tn 1.E04 1.EJH OL i N ^ „ ^