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11UMDODJAVATLYL6 KHOAN C U I ^ ^ O I E S N
L>in dddn Vdt ty Dia chdt. Km9. Nguyin Trdi. Thanh Xudn. Hd Ngi
khd ndne ma r6n<, ni^ innn t- z.i •.•- . * ^rcei quan ty 400 kenh do (cd
I.MdTDAU
Phuong phip dia chin Id mft phuong phdp chu Ivc ttong nghifin ciiu, dilu tta flidm dd dja chat khodng sin vd dia chit cdng ttinh bing phuong phip dja v|it ly.
Phuang phip dia chin da dugc iing dung 6 Vift Nam tir rat Iiu, ttong ca mdi trudng dat liln vd mdi ttudng nudc. Tuy nhifin, cdc fliiet bj do dja chin cua Vift Nam Sii dvng tu ttudc din nay diu Id cic ti?m nhd (24 - 48 kfinh) vd phuc w chu yeu cho cdng tic nghien ciiu ndng, dia Chan cdng ttinh. Cic nghifin ciiu sau hon nhu dfi tim kilm khoing sdn dau md, khi dit... fliudng do nudc ngodi dua fliiit bj vi cdng nghf vdo flivc hifn. Dfi ndng cao ndng Ivc dieu tta tiiim dd dia chit khodng sin. gidi quylt cic nhifm vy phiic tap d df siu ldn hon, nhu tim kilm tiian d ding bing Sdng Hdng... Ufin dodn Vat \f Dja chit da dugc ttang bj tram do dja ehan E428XL cua hang Sercel vi t r ^ do dja vat \f iS khoan ciia hang Robertson. Cic ttam ndy da dugc dua vdo su dvng tii ndm 2013.
II. BAC ei^M CAc MAY DjA VAT LY 1. Ti?m ao ^ ihin E42aXL cua h a ^ Sercel Md hlnh tt?m do dja chin E428XL Ciia hang Sercel dugc md ta nhu hlnh 1. Hf tiidng ttam do dugc qudn \f bdng 1 miy tmh chii chay bing hf dilu hdnh Linux Tat cd cic diilt bi diu dugc ding bf vl mdt flidi gian qua GPS nfin t&h chmh xdc rat cao. Trgm mdy bao gim hai LAUX trong dd mft LAUX dl kit nii ttvc tilp VOT Ute Box vdi chiic ning luu ttO dfm vi ttuyen so lifu sd hda vl miy chii; mft LAUX cd flie kfio ddi linh dfng ^ kit ndi VOT ttiyen do t?o ra sv linh dfng cho ttam do, cung nhu an ttidn vdi cho ttam do vdi nhimg viing cd dia hlnh phiic tap.
Dilu khiln nguin nl: vifc kich nl cung an Uidn hon vdi vifc kit hgp kich nl su dvng cdng nghf khdng diy gifla mdy no min vd mdy chiu
Moi kfinh do gom mdt nhdm vdi 9 miy tiiu kfit noi vdi nhau, mii nhdm kit nii VOT mft FDU cd chiic ndng sd hda vi tniyen du lifu; 6 FDU lien tilp dugc kit no. vdi LAUX cd chuc ndng tip hgp dfl heu flidnh cdc gdi dfl lifu dl chuyin tilp Tram mdy quan \f 400 kfinh do (cd khd ndng md rfng den 1000 kfinh).
Hinh 1. Hi thdng trgm mdy do dfa chdn E428XL ctia hang Sercel.
Hifn nay, Uen dodn Vft ly Dja chit dang khai tiidc 210 kfinh do, tuong duong tii da Id 3150 m trfin mft chdng do, viSi so kfinh do ndy chiing ta cd thi nghien ciiu d df sdu khodng 3 km.
Ndm 2013, Ufin dodn Vft 1;^ Dja chat da tiivc hifn dl dn "Dilu tta, ddnh gid tdi nguyfin tiian phin dit liln, bl Sdng Hing"
bdng fr^un do dja chin E428XL vdi cdc flidng sl Bdng 1.
Bdng 1. Cdc thdng s l ky thu|t do ghi dja chdn Khao sdt
Kiem nguon Ky ttiugt
Tdc df truyfin thi hifu~
Thong so 2D Gdynl 8Mbps
Ky thugt Budc ma hda Kieu IQC Thdi gian ghi
Thong so 0,5 ms Cye tieu
4s Ttong giai do^n dau flii cdng dl in
"Dieu fra, ddnh gid tdi nguyfin tiian phan dit liln, bl Sdng Hing" Ufin dodn Vft Iy Dja chit liy cdc tiiam sl: Sampling rate (budc mau hda sl lifu) Id 0,5 ms vd tiidi gian do Id 4 s. Vdi diam s i ndy cd khd ndng fliu dugc cdc mit phin x? ca ban d vitag triing sdng Hing.
Cic file so lifu fliu dugc cd djnh dang chuin vdi phin mem xu 1^ s6 lifu dja
chin hifn nay. Dudi ddy l i mft vf dy vk so lifu thu dugc frong giai do^ui flii cdng dl dn "Dilu tra, ddnh gid tdi nguyfin flian phan dat Uen, be Sdng Hing" dugc hiln flii ttfin phin mem Vista (Hinh 2).
Ket qud budc dau ip dvng thinh cdng ttam do dja chin mdi dl gidi quylt m\ic tifiu nhifm vv d ^ ra cua dfi dn "Dilu tn, ddnh gid tdi nguyfin than phin dit liln, b^
Sdng Hing".
Hlnh 2. Bdng dia chdn vd sd liiu thu
»,h^JV" ^ ^ "*• '* fl'*"B khoan
MICROLOGGER - 2 ciJa hang ROBERTSON
Dja vft Iy gilng khoan Id mft llnh vuc ciia^dja vft 1^, bao gim vifc sir dyng nhieu phuang phdp vft ly hifn dai dfi khdo sdt lit cit dja chit dgc tiidnh gilng khoan nhdm phdt hifn vd dinh gid cdc khodng sdn cd fch, ding tiidi tiiu tii|p cdc
B*« S«y 4v U ^ theo 1^ Ufa d|a rh^B
duac trong khdo sdt be than song Hong.
tiidng tin vl van hdnh khai tiiac md vi vl trang tiidi ky tiiudt ciia gilng khoan.
Cung nhu cic he do ghi cua cic phuang phip dja vat Iy ttfin mit, moi phuang phip dja vat ly ttxing p i n g khoan dugc tiivc hifn nhd mft hf tiling tiiiet bj do ghi. Hf do ghi ndy cd hai phin chfnh Id
miy gifing vi tram ghi. Hai phdn ndy lam vifc ddng bd vdi nhau nhd cdp ndi giua chiing, cip dugc quan tten tdi cd dgng ca dfi thvc hifn vifc keo, thi. Miy gieng, hay cdn ggi Id dng do (Sonde) Id phin may thd vdo gifing khoan. Miy gifing cd chiic ndng phat tfn hifu vd thu tin hifu idi truyen lfin tram ghi d iiidt dit qua cdp chuyfin dvng. Tram ghi la phan mdy lap ddt trfin mat dat cd cau hinh gdm cic khdi chiic ndng vd mdy tfnh chuyfin dvng thvc hifn nhifiu chiic ning khic nhau nhu cung cip ngudn ddng cho mdy gifing ldm vifc, ttuyin cdc thdng sd difiu khifin xuing mdy gifing, thu nhan cdc tfn hifu tir mdy gilng vi luu gifl kit qud do.
Tram do dia vat ly gilng khoan cua hang Robertson (Vuong quic Anh) dugc md td d Hlnh 3.
Tram miy do ghi dja vdt 1^ gilng khoan RG Micrologger - 2 Id tiiilt bj ghfip
ndi nhd vd thufn tifin di dfng. Tr^m cung cdp ngudn cho Sonde vd cdc ket nii bj thong phv trg cua cdc thifit bj RG Portalog, ProLogger yd PCLogger. Tr?m bao gdm mft ghfip ndi sonde tifin tiln c6 kha ndng giao tifip vdi tit cd cdc mdy do RG md khdng cin phdi cd cdc mddun bl sung. Tr?m Micrologger- 2 ciing cd th^
chap nhan mft bang mach b l sung dl cd till cung cip kha ndng xfl ly tin hifu video cho cdc umg dvng chvp anh gifing khoan.
Tdi RG 2000 m cua hang Robertson c6 chieu ddi cdp 1000 m vd 2000 m, 4 15i, dugc thilt ke dam bdo an todn vd tifn lgi cho ngudi sfl dvng.
Tr^m do dja v|it ly gilng khoan c(5 thfi dp dyng dugc cic phuomg phdp:
Do gamma tv nhifn d(?c tiidnh gilng khoan.
S m a r t
Winch 2 0 0 MicroLogger USB Link r Video <6;fc.n) T I ~ „ ~ " ^
Hif^
Tension G a u g e S o n d e
\y
Looging C o m p u t e
1 2 Volt D C
Micro-
Logger 2 M a i n s P o w e r Unit or Battery .Earth
S U I c e
ly^icroLogger and Smart Winch - Interconnections for Logging Setup
Hinh 3. Hi thong trgm do dia vdt If giing khoan Mierologer -2 cua hdng Robertson.
Do gamma mat do doc flianh gilng khoan.
- Do difn ttd dgc tiidnh gilng khoan.
- Do nhiet do gilng khoan.
- Do sifiu am dgc tiianh gilng khoan.
- Eto cdc tiiam sd ttang tiiii Io khoan:
dudng kfnh, do lech vd phuong vi gilng khoan.
Mft dng do cd till su dung cho mft phuang phdp hodc nhilu phuang phdp cung mft liic. Vdi tram mdy ndy, dugc fliiet kfi cac Ing do nhu sau:
/. dng Oo IO14720: dng do dugc fliiit kfido ding tiidi cdc phuang phdp difn
^ ^ gamma ty nhifin; gamma mat do;
dudng kfnh gilng khoan.
Cdc thong sd chinh: Dudng ki'nh dng do 50 mm; Tic df do tifiu bilu 4 m / phut
Ddi hogt dpng: Dudng kfnh gilng khoan tu 50 - 300 mm (2-12 inch)
2. dn^ 1002141: Ing do dugc thiet kl do ding flidi cdc fliam so tt^g fliii gifing khoan: df Ifch (nghifing) va phuang vj gieng khoan.
Cdc thong sd chinh: Dudng kfnh Ing do 42 mm.
Ddi hogt dpng: Df nghifing tii 0 - ±90 df.
Hgn ehe: Gdc Ifch phuomg vj cd flil khdng xdc djnh dugc vdi l l khoan cd kim loai (nhu Ing chdng, be tdng cd sdt...).
3. dng 1014634: dng do dugc fliifit kl do ddng tiidi cdc tiiam so dudng kfnh vd nhift df gifing khoan.
Cdc thong sd chinh: Dudng kfnh Ing do: 38 mm, tie df do tifiu bilu: 5 m/phiit.
Ddi hogt dpng: Cinh tay ngin: tfr 40- 710 mm.
4. Ong 1002184: dng dugc tiiifit kl do sifiu am dgc tiidnh gieng khoan.
Thong s6 chinh: E)udng kfnh Ing do:
48 mm (khi trang bj mddun hudng).
Ddi do gieng khoan cd dudng kinh tii 67-200 mm; tie df do (cdp 4 day):
Do phdn gidi 90 pixel/vdng quay: Tdc df = 9,59 m/phut.
Df phan gidi 120 pixel/vdng quay:
Tdc df = 7,3 m/phut.
Df phan giai 180 pixel/vdng quay : Tic do = 4,9 m/phut.
Do phdn gidi 360 pixel/vdng quay:
Tic df = 2,54 m/phlit.
Ddu do: Tic do quay: 20 vdng/giay (tdi da); Tic df bdn (pixel/vdng quay):
360 ldn moi vdng xoay (tii da).
Biin dp/Thu thdp: Df phdn giai bien do: 8 bit; Df phan gidi tiidi gian tiiu phdt:
0,1 n s ( b f dim 12 bit).
Kfit qud da dp dyng ttam dja vat 1^
gifing khoan Micrologger- 2 cua hang Robertson tiidnh cdng frong khdo sdt flian thufc de dn "Dilu fra, ddnh gid tdi nguyen than phin dit liln, bl Sdng Hdng" va cdc dv an khdo sit dia chit cdng ttinh Hinh 4 vd 5.
III. K t r LUAN
Cdc ttam do mdi cd df tt'eh hgp fliiit bi rat cao, vifc ttiln khai hoat dfng ttfin pham vi rfng hom cic ttam cu. Cin xdy dvng quy ttinh do cho phu hgp vdi tt?m do mdi nhdm khai flidc cd chit luang vd hifu qud Idu ddi.
r S p S c*S CAMMAnfiiiS cSfovSNOG atNTROsiAT NHitroO t*
'. .«w I I 1 t I
tncinkn 0 I U 400 0 CPS 200 1 OMM 100 » to
Hinh 4. Kit qud do dja vdt If giing khoan, du&ng cong thi hiin ro tgp than bi Sdng Hdng (phdn mdu den) cpt dfa tdng gieng khoan.
w * * ! not - LM - lyptt
Hinh 5. Kit qud do siiu dm khdo sdt dia chdt c6ng trinh khu vuc Dio Cd ddxdc dinh duprc hi thong khe nut khd ro.
Ket qud budc diu cho fliiy, phuang phdp do dja vat \f gilng khoan fliu dugc flie hifn bing cic dudng ghi phdn dnh khd rd dja tang dgc flidnh gilng khoan. Cdc bdng ghi dja chin khd phan dj, flil hifn dugc cic mdt phdn xa co bdn ciia dit dd fliufc vimg nghifin ciiu.
VAN L i f u
1. Catalog ttam mdy 428XL User's Manual. Voll, Vol2, Vol3.
2, Catalog ttam miy Robertson Geologging Micrologger-2 Operating Manual.
SUMMARY
Introduction to the Sercel Seismic Monitoring Station and the Robertson Well Longging Station
„ - Nguyin Tudn Ndm. Hodng Hdi Hd
„ . '^Suyen Vdn Sang Nguyin Khde Due, Bid Minh Thdnh
Ngu&i biin tgp: TS Nguyin Truang Luu.
