754 Sii dung cac thilt bj da kenh dg khao sat trang thai ky thuaj^^^ SLT DUNG CAC THIET BI DA KENH DE KHAO SAT TRANG THAI KY T H U A T G I E N G KHOAN 6 CAC MO BACH HO, RONG Pham Xuan Son, Trin Trong[.]
754 Sii dung cac thilt bj da kenh dg khao sat trang thai ky thuaj^^^ SLT DUNG CAC THIET BI DA KENH DE KHAO SAT TRANG THAI KY T H U A T G I E N G KHOAN CAC MO BACH HO, RONG Pham Xuan Son, Trin Trong Lugng XNLD Vietsovpetro TOM TAT N66_V(58) Khdo sdt tinh trgng ky thugt giing khoan cd vai trd rdt quan trgng viec h-i tudi tho cua giing Bdi viit ndy nhdm gidi thiiu cdc thiit bi cdng nghi hiin dgi khdo sdt trgng thdi ky thudt ciia dng chdng, dng khai thac, nd luc ldm chu cdng nghi cua Xi nghiep Dia vdt ly giing khoan vd hiiu qud dp dung ciia chung & cdc md ddu cua XNLD Vietsovpetro M d DAU Qua nhilu nam sir dung, 6ng ch6ng, 6ng khai thac cac gieng khoan hi bao mon, an m6n, bien dang va pha vo, miic gan ket ciia xi mang ciing bi giam siit theo thai gian Chinh vi vay, viec khao sat trang thai ky thuat de phat hien kip thai nhung bien dang, pha buy va c6 bien phap sira chiia kip thoi da tra bat buoc de keo dai tu6i tho, nang cao hieu qua sir dung gieng khoan De khao sat trang thai ky thuat cua 6ng, nguoi ta da sir dung cac loai thiet bi kbac dua tren viec xac dinh chieu day tir duong kinh cua 6ng, bao g6m thiet bi nghien cim t6ng quat kenh (chieu day t6i da va chieu day t6i thieu cua 6ng tai m6i chieu sau nghien cim: MAXMIN) va nghien cim chi tiet bang cac thiet bi da kenh (chieu day chi tiet ciia timg phan 6ng) Thuc te khao sat trang thai ky thuat cua cac loai 6ng kbac a tren 100 gieng khoan cua Vietsovpetro cho thay, cac thiet bi MAXMIN phan Ion cac truang hgp da dap img cac yeu cau khao sat dat ra, cho phep phat hien cac bien dang cua 6ng de tien hanh sira chira Tuy nhien, mot s6 truang hgp 6ng bien dang phiic tap, thiet hi MAXMIN n6i tren kh6ng phan anh day dii hien trang cua 6ng Tuong tu nhu vay, doi vod c6ng tac khao sat chat lugng gan ket xi mang, lap vo xi mang bi nirt va, co kenh dan lien th6ng thi cac may khao sat tong quat xi mang thong thuong khong phat hien dugc Nhung dieu nhu vay gay kho khan cho viec chon lira phuong an sira chira tii uu gilng khoan De khae phuc tinh trang tren, Xi nghiep Dia vat ly gieng khoan da trang bi cac thiet bj da kenh de khao s^t chi tiet xi mang sau Ing ching nhu SBT (tir nam 1995); CAST-V (1997), va khao sat chi tiet trang thai ky thuat ciia Ing bing may da kenh CAST-V(1997); MIT (1999) Hon ban cac thiet bi khao sat t6ng quat, thiet bj khao sat da kenh cung cap tir den 100 gia tri quanh 6ng tai m6i chieu sau nghien cim, cho phep xay dung hinh anh chi tiet ve trang thai ky thuat ciia gieng khoan de xac dinh mot each chinh xac tinh trang hien tai cua gieng GIOI THIEU THIET BI • • Thiet bj khao sat ong MIT (Multi-finger Imaging Tools) cua Sondex Bo phan quan nhit cua thilt bi la cac canh tay ciia may, dong vai tro nhu nhimg dau d6 dl ban kinh ciia Ing Khi lam viec, tit ca cac canh tay (24, 40, 60, Tuygn tap bao c^o Hoi nghj KHCN "30 nam Dau Viet Nam: Cff hoi moi, thach thuc moi' 755 hoae thuoc vao loai thilt bi) cua may dugc ap sat vao Ing va dugc ty vao bo cam biin, chuyin lire co hoc tin hieu dien Cac tin hieu dugc chuyen sang tin hieu s l bing bo biin dii tuong tu - s l va chuyen Ien tram theo duong cap dia vat ly hoae luu tni bo nho cua may gieng khoan Dua vao cac tin hieu chuan may va tin hieu dugc, tram se xac dinh ban kinh cua 6ng iing voi m6i canh tay (Rt) Be day 6ng tai vi tri cua mli canh tay dugc xac dinh theo c6ng thiic: Wail thickness = Rn - Rt Trong do, Rn la ban kinh ngoai danh dinh biet truoc cua 6ng Sai s6 ciia phep ban kinh 6ng la ± 0,03" (0,762mm) Sir dung cac phan mem chuyen dung, cac gia tri se dugc bieu dien duoi dang cac biic tranh 2D va 3D chi tiet ve be mat ben ciia 6ng, tir CO the xac dinh miic bien dang ciia 6ng tai chieu sau nghien ciru (Hinh -^ 10) Cac may duong kinh da kenh MIT (Hinhl) hien dugc ap dung ph6 bien a Xi nghiep Dia vat ly gieng khoan co the khao sat nhieu loai 6ng co kich thuoc kbac Trong d6 cac may MIT 24 kenh diing de khao sat 6ng khai thac, cac may MIT 40; 60 va 80 kenh de khao sat 6ng ch6ng Th6ng s6 ky thuat ciia may dugc trinh bay bang sau: SPECIFICATIONS fooldianvftter No of fingers Rango (nch»» Rangct mm t e m p rating p r e t s rating Rad (a) resoltitloA Vertteatresoltttton tang Hi W«l!Qht typical log speed Max, I09 5pa»d Max, d6vialio(t"* Memory varsion Range a x t e n t i o f i 11/J6" )45wm) 24 17 - 45-114 1530 & 'TIC 15 000 est Vi'd" s54mm) ?.'4'-(?Cmm) 40 4'-{102mm) 60 • 67 «• (204 mm SC 25 - 5.5 - '4 3-r S 57 - 140 216- i55 76-T90 n - 245 15GC & 177 150CA177C t!CC & 177C ISCIC 177C t 5,000 s»i T , O J psi 5,000 psi 15,000 psi O.OOi'iO.OTemrr'i 0,OG5" {0.127mm ODC-S" (0 127rTtm- 0.0i/'i,-:i: Iritiii- im itiUilhlu UA'SAJ liritii: RiiU-ClMM'-ZMiiiO 122 IS" C310 26 c m ) lOO.-lu'is VlTlicil iit (1 k.ilc IVIcn».-i(v Svviciir i-.-ri,\in ^.iM^/fi tif lO-hi •.- •^Liii.m nic.n.M r\-jr:fi.\< 'uvii rj:u:M/.'rN> sy.sr/.M (" iitbuiulnhly: i^ris IKI:QI.IRI:S JM \v(>Ki>s/r'H.\Mi.i Mi:.\SllRKMKNT i>>l»i.>l1k- ijiii.it.ai., Ay.iMUiI.jlSjiiipli.ii; Voni.^lSarnpl.i.t! 17 10-3/6 (5«5.46 c m ) J6.SO192 71 cm) fuh f'.O . psi) ]lAm>\V.ARJ., COMl>WllSSI()N 56 10" (142