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Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Hd" CONG NGHf XCr LV NLfOC BOM ^P VA HJfU QUA COA N 6 OLTpc AP DUNG 6 M 6 BACH H 6 COA XNLD VIETSOVPETRO Hoang Dinh Tien, Nguyen Thuy Quynh Pham Ba[.]
Hdi thdo khoa hoc "Ndng cao he sdthu hdi ddu md Bqch Hd" CONG NGHf XCr LV NLfOC BOM ^P VA HJfU QUA COA N OLTpc AP DUNG M BACH H COA XNLD VIETSOVPETRO Hoang Dinh Tien, Nguyen Thuy Quynh Pham Ba Hien, Truang Anh TO XNLD Vietsovpetro ABSTRACT For holding the layer pressure to enhancement of oil recovery, the J/V Vietsovpetro inject the sea water in the fields The sea water actiones with new subjects as: collector oil and formation water This fenomen will decrease the permeability and porosity of collectors, cause the corrosion in the hole equipment, also equipment in system PPD Due to this fenomen in system PPD is dosed sodium hypochlorite at pre-treatment stage downstream of the hydrocyclones where it provides a kill of the water organisms Dosing coagulant with flocculant to liberate particles from sea water deaeration by antifoam liberaie dissolved oxygen by oxygen scavenger to have not heard of scaling problems using scale inhibitor to reduce the corrosivity of seawater using corrosion inhibitor and biocides to kill bacteries and et cer But in outside of equipment exits dangedo corrosion In differite parts of equipment, hole bottom zones, even in layer of the field exist the precipitation of nonorganic salts to decrease permeability in the canals of ciculation From this is needs to study and recommendation to deside those problems De tri ap suit via nham nang cao he sd thu hdi dau ddi vdi cac ddi tugng khai thac md Bach Hd cung nhu md Rdng va Dai Hung, XNLD Vietsovpetro va eae nha thiu d md Dai Hung trudc nam 2000 da tien hanh bam nude vao via Khi bam nude vao via xay tuang tac giua nude bam vdi mdi trudng mdi la da chCra va dau Cac tuang tac cd xu hudng lam giam tinh thim chua eua da, lam thay ddi mpt sd tinh chit ly hda eua dau Ddng thdi nude bam cdn ed tac hai gay an mdn thie't bj Idng gie'ng cin dng ep hai cung nhu he thdng bam ep tren mat Oe khic phuc cac hau qua tren XNLD Vietsovpetro da tien hanh nghien eUu va de eae giai phap xCr ly Bien phap d i u tien la xu ly nude bam trudc dua vao via I T H A N H PHAN VA TfNH CHAT COA N G U N NLTCJC BOM f P TRLTCJC KHI X(J LY De xu ly nude cd hieu qua, nam 1994 XNLD da ky hgp ddng vdi hang SERCK BAKER (Contract 1280/ 8525) nghien eCru tinh chit eua nude bam Nghien eCru cpt nude bien d md Bach Hd cho thiy d dp sau 25m nude it tap chit va eae dpng thyc vat, phu du trdi ndi - Trong nude d dp sau it cac phan neu tren song vin tdn tai cac hat cd kich thudc tU nhd 2|.im tdi 5).mi chie'm tdi 39.35% (khoang 10000 hat), cdhat Idn han 5)am chi chiem tdi 5.15% - Trong nude cd phu du, dpng thyc vat, rong tao, cac vi khuan ua va ky khi, dac biet cd vi khuan khu sulfat Cac vi khuan ua chiem tdi 10^-10'' te bao/ml, edn vi khuan ky chie'm tdi 10 -10^ te bao/ml, dd vi khuan khu sulfat dat tdi 10-lOMe bao/ml (Bang 1) - Ion sulfat (SO;^) ham luang kha cao dat 2600 mg/l cd the la ngudn nudi vi khuan khu sulfat - Lugng Oxy ty ludn cd nude bien va dat tdi 4.4-f6.4 mg/l, la ngudn gay an mdn thiet bi Ngoai sdng danh lien tue, ddng chay va v.v cung lam tang eae bpt ehUa oxy nude - Lugng biearbonat khdng cao (trung binh 127 mg/l) va canxi dat 400 mg/l nhung da d mUc dp bao hda Vi vay nhiet dp tang len lupng mudi CaCO., CaSO^ va mpt sd mudi khae de bi sa lang Ham lugng Ba, Sr rit thip (Ba 0.22 mg/l, Sr den 2.7 mg/l) khd cd kha nang tao cac mudi sulfat Bari hay Stronsi 145 Hdi thdo khoa hoc ".\ang cao he sd thu hdi ddu md Bach Ho" - Trong nude ludn ed lugng ty sau dieu che hypoelorit natri cung gay tang tdc dp an mdn (thudng la 1.5 mg/l) - Ngoai cac dac tinh chu yeu tren cdn mpt sd tinh chit khae cua nude nhu dp due (0.2-1.2, trung binh 0.49 NTU)va v.v Bang Tinh chat ly hda eua nude bien Chi tieu dmoOai Hung mo Bach Ho Vi tri liy miu 15m 25 m Ty trpng d T=20°C, g/cm^ 1.023 1.023 Ph 8.2 8.2 DpdindiendT=25°C, mS/cm 52.0 49.3 cr mg/l 18800 18500 SO4", mg/l 2634 2520 HCO3", mg/l 163 124 CO3-, mg/l Na', mg/l 9970 K*, mg/l 550 Ca", mg/l 440 Mg", mg/l 1210 Ba", mg/l 0.03