Daim ntawv thov ntawmDTS systemsnyob rau hauv qhov kev txiav txim siab yog ib tug paradigm ntawm kev vam meej kev koom ua ke ntawm fiber optic sensing technology rau hauv cov roj thiab roj kev lag luam, uas tau zoo heev advanced kev soj ntsuam ntawm cov roj thiab roj reservoirs thiab kev txhim kho kev loj hlob thiab kev tswj efficiency.
Dab tsi yog Distributed Fiber Optic DTS System?
Ua ntej, peb yuav tsum to taub ob lub ntsiab lus tseem ceeb:
1 . Distributed Fiber Optic Sensing
Tsis zoo li ib txwm taw tes sensors (uas tsuas yog ntsuas ntawm qhov chaw tshwj xeeb), faib fiber ntau optic sensing siv tag nrho cov khoom siv kho qhov muag raws li ob qho tib si kev hnov lus thiab kis nruab nrab. Nws ua kom tsis tu ncua, tiag -lub sij hawm ntsuas lub cev muaj nuj nqis (xws li, kub, acoustic nthwv dej, strain) ntawm txhua qhov chaw raws cov fiber ntau. Qhov no txhais tau hais tias tso ib qho kev kho qhov muag fiber ntau tuaj yeem tsim cov kab ntsuas txuas ntxiv txuas mus rau ob peb mais lossis txawm kaum mais.
2 . DTS System
Luv luv rau Distributed Temperature Sensing System, nws ua haujlwm raws li Raman tawg ua haujlwm. Thaum laser pulses propagate los ntawm fiber ntau optical, lawv cuam tshuam nrog fiber ntau molecules los tsim Raman tawg lub teeb. Qhov sib piv ntawm Stokes lub teeb rau kev tiv thaiv -Stokes lub teeb muaj cov kab ncaj nraim nrog qhov kub thiab txias ntawm qhov sib thooj ntawm cov fiber ntau. Los ntawm kev ntsuas lub sij hawm sib txawv ntawm laser emission thiab teeb liab txais, lub kaw lus muaj peev xwm xam qhov chaw ntawm qhov kub thiab txias.
Hauv cov ntsiab lus yooj yim, DTS system siv cov khoom siv kho qhov muag tshwj xeeb los ua qhov tseeb - ntsuas lub sijhawm thiab qhov chaw ntawm qhov ntsuas kub tsis tu ncua ntawm tag nrho lub qhov dej, los ntawm lub qhov dej mus rau hauv qab lub qhov.
Core Applications of DTS in Logging
Hauv kev nkag teb chaws, DTS thev naus laus zis feem ntau yog siv rau kev txiav thiab kev txhaj tshuaj, muab cov ntaub ntawv tsis tau pom dua rau kev tswj xyuas cov roj thiab cov roj reservoirs.
1.Fluid Production Profile txhais lus
Qhov no yog ib qho ntawm feem ntau classic thiab tseem ceeb daim ntawv thov ntawm DTS. Kev txiav txim siab ntau lawm yuav tsum tau ua haujlwm nyuaj ntau- cov cuab yeej ntsuas cov hlua, uas ua rau cov nqi ua haujlwm siab thiab muaj kev pheej hmoo, thiab tsuas yog muab kev ntsuas snapshot. Hauv qhov sib piv, DTS tuaj yeem ntsia tau mus tas li kom xa cov ntaub ntawv txuas mus ntxiv, tiag - sijhawm.
Txoj Cai Ua Haujlwm:Thaum cov roj thiab cov kua roj ntws los ntawm cov dej tso rau hauv lub qhov dej, qhov kub thiab txias hloov tau tshwm sim vim yog Joule-Thomson effect. Gas expansion absorbs tshav kub, ua rau kub poob ntawm inflow point thiab tsim ib tug tsawg -kub anomaly; Kev sib txhuam ua kua ua kom sov, feem ntau ua rau me ntsis kub nce ntawm qhov nkag mus.
Txoj kev thov:Los ntawm kev txheeb xyuas cov ntsiab lus txawv txav (cov ntsiab lus kub hloov pauv) hauv qhov ntsuas kub ntawm qhov dej, cov kws ua haujlwm tuaj yeem txheeb xyuas qhov ua tau zoo ntawm lub sijhawm thiab qhov sib piv ntawm txhua lub sijhawm. Kev soj ntsuam tas li ntawm qhov kub thiab txias hloov thaum lub sij hawm huv huv -nce tom qab kaw- nyob rau hauv thiab kev tsim khoom pib ua kom pom tseeb ntawm cov dej ntws tawm.
2. Dej / Chav Txhaj Tshuaj Profile Saib Xyuas
Hauv kev rov qab cov roj theem nrab (piv txwv li, kev txhaj tshuaj dej) thiab cov roj hnyav thermal rov qab (piv txwv li, chav txhaj tshuaj), kev nkag siab txog txoj kev tsiv teb tsaws ntawm cov tshuaj txhaj tshuaj yog qhov tseem ceeb.
Dej Txhaum Qhov Zoo Saib Xyuas:Cov dej txhaj tshuaj feem ntau muaj qhov sib txawv ntawm qhov tsim. DTS tuaj yeem paub meej tias lub sijhawm twg nqus tau cov dej ntau ntxiv, yog li ntsuas kev txhaj tshuaj dej, tsis txhob ntiv tes thiab dej channeling, thiab txhim kho cheb efficiency.
Chav Txhaj Tshuaj Zoo Saib Xyuas (tshwj xeeb yog cov roj hnyav rov qab):Nov yog daim ntawv thov tua neeg ntawm DTS. Chav kub yog ntau dua qhov kub ntawm qhov tsim. DTS muaj peev xwm tiag tiag-lub sijhawm qhia txog kev txhim kho ntawm chav chamber thiab txoj haujlwm ua ntej ntawm chav ua haujlwm, qhia ncaj qha qhia tias lub sijhawm twg yog qhov ua tau zoo. Qhov no yog qhov tseem ceeb rau optimizing chav txhaj tshuaj tsis muaj zog (siab, kub, qhuav, txaus tus nqi).
3.Wellbore Integrity Diagnosis
Annular Casing Leak Diagnostic: Yog tias kev sib tshuam -zonal cais tsis ua haujlwm, cov dej xa tawm tshwm sim sab nraum lub casing. Xws li channeling ua rau kub tsis xws luag, uas tuaj yeem kuaj pom thiab nyob ntawm DTS.
Cement Bond Quality Evaluation:Cov cheeb tsam uas tsis zoo ntawm cov cement bonding tau hloov pauv cov yam ntxwv thermal conductivity, uas tuaj yeem cuam tshuam txog qhov kub thiab txias thiab ua lub hauv paus rau kev txiav txim siab.
Pipeline Leak Detection:DTS tuaj yeem saib xyuas cov dej xau hauv cov khoom siv downhole xws li subsurface kev nyab xeeb li qub thiab cov ntim khoom.
4.Fracturing Monitoring thiab Effect Evaluation
DTS kuj tseem ua lub luag haujlwm tseem ceeb hauv ntau- theem tawg ntawm cov kab kab rov tav rau cov khoom siv roj thiab roj tsis zoo (shale gas, roj nruj).
Txoj Cai Ua Haujlwm:Qhov kub ntawm cov kua fracturing txhaj thaum lub sij hawm fracturing txawv ntawm qhov tsim kub.
Txoj kev thov:Los ntawm kev saib xyuas qhov kub thiab txias ntawm txhua pawg thaum lub sijhawm thiab tom qab kev ua haujlwm tawg, cov kws ua haujlwm tuaj yeem txiav txim siab seb cov perforation pawg twg thiaj li nqus cov kua dej tawg thiab ntsuas qhov sib xws thiab kev ua haujlwm ntawm kev tawg. Thaum Distributed Acoustic Sensing (DAS) feem ntau yog siv rau hauv kev soj ntsuam kev puas tsuaj los txheeb xyuas qhov pib tawg thiab nthuav tawm, DTS muab cov ntaub ntawv ntsuas kub ntxiv rau kev ntsuam xyuas tag nrho ntawm kev puas tsuaj. Piv txwv li, "DTS + DAS" system tsim los ntawm Zhiteng Micro tau koom nrog ntau tshaj 90 fiber optic logging tej yaam num thiab 26 ntev - lub sij hawm soj ntsuam tej yaam num rau hnub tim, tom qab xyoo ntawm technologies R&D, teb siv thiab tej thaj chaw deb kev pab cuam.
Qhov tseem ceeb ntawm DTS Technology
Kev ntsuas kev faib tawm tag nrho:Muab qhov txuas txuas ntxiv, ua tiav qhov ntsuas qhov ntsuas qhov zoo uas tsis muaj qhov ntsuas qhov muag tsis pom.
Tiag - sijhawm thiab txuas ntxiv:Tso cai rau 24/7 tsis cuam tshuam kev soj ntsuam kom ntes cov xwm txheej kub thiab txias ntev - lub sijhawm hloov pauv.
Kev txhim kho tas mus li:Optical fibers feem ntau khiav nrog cov hlua ua tiav, muab sijhawm ntev - cov txiaj ntsig los ntawm ib qho - sij hawm nqis peev thiab tshem tawm qhov xav tau rau kev siv ntau zaus, raug nqi ntau lawm.
Hnyav ib puag ncig kuj:Optical fibers yog ua los ntawm quartz, nrog rau siab tiv taus kub, siab siab thiab corrosion, haum rau complex downhole tej yam kev mob.
Tsis muaj cov khoom siv hluav taws xob:Lub downhole seem muaj cov khoom siv passive, ua kom muaj kev ntseeg siab thiab ua haujlwm ntev.
Intrinsically nyab xeeb thiab tawg - pov thawj:Inherently muaj kev nyab xeeb, ua rau nws zoo tagnrho rau flammable thiab explosive roj thiab gas zoo ib puag ncig.
Cov kev sib tw thiab kev txwv
Ambiguity hauv kev txhais lus:Kev hloov pauv kub tuaj yeem tshwm sim los ntawm ntau yam (piv txwv li, cov dej nkag, channeling, geothermal gradient variation). Kev txhais lus dav dav suav nrog kev sib txuas ntawm geological, engineering thiab lwm yam ntaub ntawv tsim khoom (xws li, tus nqi ntws, siab) yog qhov yuav tsum tau, ua rau muaj kev xav tau siab rau cov neeg txhais lus.
Ua lag luam- tawm ntawm qhov kev daws teeb meem spatial thiab ntsuas qhov ntsuas qhov tseeb:Kev lag luam tawm - tawm muaj nyob nruab nrab ntawm qhov kev daws teeb meem spatial (feem ntau nyob ib puag ncig 1 meter) thiab qhov ntsuas qhov ntsuas kub tsis txaus, ua rau nws nyuaj rau qhov tseeb qhov sib txawv ntawm qhov ua rau nyias nyias.
Nyob ntawm qhov sib txawv ntawm qhov kub thiab txias:Kev ua tau zoo ntawm DTS yog nyob ntawm qhov sib txawv ntawm qhov kub txaus ntawm cov kua dej nkag / txhaj tshuaj thiab qhov tsim ntawm qhov kub thiab txias. Kev txhais lus yuav nyuaj thaum qhov sib txawv ntawm qhov kub thiab txias tsawg.
Tus nqi pib nqis peev siab:Kev nqis peev thawj zaug hauv kev ua tiav fiber ntau optic yog qhov siab, yuav tsum tau txais kev ntsuam xyuas nyiaj txiag zoo.
Xaus
Distributed fiber ntau optic DTS systems tau hloov tag nrho cov toj roob hauv pes ntawm cov tsoos ntau lawm txiav. Lawv tau tig lub qhov dej los ntawm cov ntsiab lus ntawm kev ntsuas qhov sib cais mus rau hauv cov kab ntsuas pob tshab, muab cov kws ua haujlwm nrog qhov tsis pom kev pom kev nkag siab ntawm cov dej ntws tawm hauv qhov dej.
Los ntawm kev ua kom ntev -lub sij hawm, tiag- lub sij hawm thiab kev ntsuas kub tsis tu ncua, DTS ua lub luag haujlwm hloov tsis tau hauv cov kua dej ntau lawm kev tshuaj ntsuam xyuas, kev txhaj tshuaj profile optimization, kev ruaj ntseg zoo thiab kev soj ntsuam kev puas tsuaj. Nws yog ib qho ntawm cov thev naus laus zis tseem ceeb rau kev paub txog kev txawj ntse thiab kev ua kom zoo ntawm reservoir tswj thiab txhim kho qhov kawg ntawm cov roj rov qab. Nrog kev nce qib txuas ntxiv ntawm fiber ntau optic thev naus laus zis thiab cov ntaub ntawv txheeb xyuas cov txheej txheem, nws cov ntawv thov kev cia siab yuav nthuav dav dua.
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