Cementing plays lub luag haujlwm tseem ceeb hauv cov roj thiab roj drilling cov txheej txheem, kom muaj kev ruaj ntseg ntawm qhov chaw zoo, thiab kev tswj hwm cov qauv txheej txheem ntawm lub neej thoob plaws nws lub neej. Tus txheej txheem no cuam tshuam nrog kev ua txhaum tshwj xeeb rau hauv lub qhov dej, uas cov kev sib tsoo rau cov kev sib tsoo pob zeb thiab txwv tsis pub tsiv teb tsaws.
Ntawm no tshawb nrhiav cov txheej txheem cementing in the-tobing nws lub hom phiaj, ntau hom xis mas, nrog rau cov khoom siv thiab cov txuj ci xav tau. Txawm hais tias koj yog tus tshiab rau cov roj thiab kev lag luam roj lossis nrhiav kom ua koj cov kev paub tshiab, nkag siab txog kev ua haujlwm zoo rau ib tus neeg cuam tshuam nrog kev sib tsoo thiab ua tiav.
Vim li cas cementing yog qhov tseem ceeb
Qaug ua hauj lwm pab ntau cov haujlwm tseem ceeb uas ua rau muaj kev nyab xeeb thiab ua haujlwm tau roj thiab roj tawm. Lub hom phiaj tseem ceeb ntawm kev cementing suav nrog:
Tswj kev ncaj ncees:CAs txhawb nqa tus dab, ua rau nws nyob hauv qhov chaw thiab ua kom lub condebore tseem nyob ruaj khov thaum kev tsim khoom.
Kev cais kua dej Zones:Cov kev sib txawv ntawm cov kev sib txawv tuaj yeem ntim cov kua dej ntau yam, xws li dej, roj, lossis roj. Cententing cais cov chaw no kom tiv thaiv kev sib kis no, khaws cia qhov tseeb ntawm lub pas dej thiab tiv thaiv ib puag ncig.
Kev tiv thaiv tus casing:Caas muab cov dab los ntawm cov kua dej hauv qhov chaw zoo, uas txuas lub siab lub neej.
Tswj tsim kev ntsuas:Kev cem cementing pab tiv thaiv cov kua tsim los ntawm kev tsiv mus rau hauv qhov chaw ua haujlwm, uas tuaj yeem ua rau tawg lossis lwm yam xwm txheej phom.
Txhawb kev ua haujlwm yav tom ntej:Casenting ua rau lub hauv paus ruaj khov rau cov txheej txheem ntxiv, xws li perforating, fracturing, lossis cov haujlwm ntau lawm.
Cov txheej txheem ua yeeb yam
Cementing yog ib txwm ua tom qab ua pov thawj yog ntsia hauv qhov dej. Cov Maas slurry yog twj tso tawm ntawm lub casing thiab circulated mus rau ib qhov chaw nyob nruab nrab ntawm lub casing thiab qhov chaw nyob. Ib zaug tso, cov cement teev thiab tawv tawv, tsim cov teeb meem ruaj khov ncig lub casing.
Cov kauj ruam tseem ceeb hauv cov txheej txheem cementing yog raws li hauv qab no:
Kev npaj zoo:Ua ntej cementing, qhov zoo yuav tsum tau ntxuav, thiab lub casing yuav tsum tau koom rau kom ntseeg tau tias cov cement yog cov faib nyiaj. Cov hauv paus thiab cov khawb khawb siv rau lub hom phiaj no.
Sib xyaw cov Maas Slurry:Lub slurry yog sib xyaw ntawm cov xis mas, thiab ntxiv, nrog qhov tseeb muaj pes tsawg leeg nyob ntawm cov khoom siv xws li, thiab ntau hom kev tsim.
Tso lub slurry:Cov slurry yog twj tso tawm ntawm lub ntsej muag thiab nce mus rau hauv ib qho chaw hauv ib qho chaw. Nws yuav tsum tau muab tso rau ntawm tus nqi kho kom meej kom nws nyob rau tag nrho cov chaw tsis muaj kev tawm suab lossis cov chaw.
Kev Hloov Chaw:Ib qho kev hloov ua kua dej, feem ntau drilling av nkos, yog siv los thawb cov cement rau hauv annulus thiab ua kom ua tiav kev them nqi ntawm lub casing.
CEMENT teeb:Thaum cov Maas yog qhov chaw, nws xav tau sijhawm sijhawm los teeb tsa thiab tawv. Lub sijhawm kho tau sib txawv raws li hom xis mas thiab cov xwm txheej zoo.
Kev Kuaj Siab:Tom qab teeb tsa, kev sim siab yog ua kom paub tseeb tias txoj haujlwm xis mas txoj haujlwm tau ua tiav thiab tsis muaj dej xau.
Hom Maas siv hauv Qhov Chaw
Cov dej sib txawv yuav tsum sib txawv ntawm cov xis mas kom tau raws li kev xav tau. Qee qhov kev siv hauv cov roj thiab roj tau zoo xws li:
Chav Kawm Maas:Haum rau qhov dej ntiav tsis muaj cov mob tshwj xeeb xws li kub siab lossis kub.
Chav Kawm G thiab H Maas:Feem ntau siv nyob rau hauv cov roj zoo, cov cai no tuaj yeem kho tau nrog cov quav ntxiv kom tau raws li cov kev xav tau ntawm ntau qhov zoo thiab cov xwm txheej.
Pozzolanic Maas:Ua los ntawm kev sib xyaw volcanic hmoov tshauv nrog txiv qaub, cov xis no tiv taus tshuaj corrosion thiab yog qhov zoo rau cov dej acidic lossis saline tsim.
Loojas xis mas:Ntxiv cov luupx txhim kho ib pawg thiab txo cov permeability, tiv thaiv cov roj kev tsiv teb tsaws ib zaug cov xis mas tau teeb tsa.
Cov ntxiv hauv Cementing
Cov ntxiv yog qhov tseem ceeb rau kev hloov kho cov Maas slurry mus rau qhov dej tshwj xeeb. Cov khoom ntxiv suav nrog:
Retarders:Qeeb qeeb lub sijhawm hloov chaw ntawm Maas, tshwj xeeb tshaj yog pab tau rau cov qhov dej tob.
Accelerators:Ceev cov txheej txheem teeb tsa, feem ntau siv nyob rau hauv cov dej ntiav ntiav uas xav tau chaw teeb meem sai.
Cov Tshuaj Ua Dej Ua Dej:Tiv thaiv dej los ntawm kev khiav dim ntawm cov slurry, ua kom tiav kom haum.
Cov neeg sawv cev hnyav:Nce cov Slurry lub ntom ntom rau cov high-siab.
Expressers:Txo cov slurry lub ntom, ua rau nws tau yooj yim rau cov twj tso kua mis rau hauv cov chaw siab siab.
Cov Khoom Siv Ua Yeeb Nkab
Cov txheej txheem cementing nyob rau ntawm cov khoom siv tshwj xeeb, xws li:
Maas Twj:Cov twj muaj cua siab tshaj tawm hauv txoj kev ntseeg qab.
CEMENT MIXE:Cov cuab yeej siv no sib xyaw cov movent, dej, thiab ntxiv rau hauv cov khaub ncaws hnav khaub ncaws slurry.
Caing Centralizers:Xyuas kom cov caseing yog koom rau hauv qhov chaw nyab xeeb rau txawm tias kev faib khoom loj.
Nta Khoom:Ntab diam thiab khau tswj hwm cov ntws ntawm xis mas thiab tiv thaiv nws los ntawm ntws rov qab mus rau hauv lub casing tom qab nqus.
Ntsug khoom siv khoom:Cement plugs are used to separate the slurry from other fluids and assist with displacement into the annular space.
Cov kev sib tw hauv kev ua yeeb yam
Thaum ua kom xis tsa yog qhov tseem ceeb, nws los nrog cov kev sib tw, xws li:
Channeling:Cov kev pab Maas tsis tiav lawm tuaj yeem tsim cov qeb tsim, tso kua rau kom tsiv teb tsaws thiab ua rau muaj peev xwm tswj cov teeb meem kom zoo.
Gas migration:Cov pa roj tuaj yeem khiav tawm mus los ntawm cov xis mas ua ntej nws teeb tsa, tsim kom muaj zog lossis ua rau cov roj muaj roj.
Poob kev ncig:Hauv qee cov qauv, cov slurry tej zaum yuav ploj mus rau hauv pob zeb hloov chaw nyob hauv annulus, ua rau ib txoj haujlwm ua tiav.
MAAs Qaub Shrinkage:Raws li MAAs txheej, nws yuav ntshai me ntsis, tawm ntawm qhov khoob. Cov khoom ntxiv xws li nthuav cov neeg sawv cev tuaj yeem pab txo cov teeb meem no.
Kev coj ua zoo tshaj plaws rau cementing
Txhawm rau kom ntseeg tau tias muaj kev ua tiav zoo, cov kev coj ua hauv qab no yuav tsum ua raws:
Npaj:Kev cem quav yuav tsum tau ua kom haum rau txhua qhov kev tsim tshwj xeeb tshwj xeeb, tsim cov yam ntxwv, thiab qhov siab / qhov kub xav tau.
Centrine:Qhov cuab yeej ua haujlwm zoo yog qhov tseem ceeb rau kev faib cov kev faib khoom cement faib.
Kev Xaiv Ntxiv:Kev xaiv xaiv sib ntxiv ua kom cov cement slurry haum cov hmoov zoo, ua rau kom ua kom tau zoo thiab teeb tsa.
Kuaj thiab soj ntsuam:Siab sim thiab txuas ntxiv yog qhov tseem ceeb yog qhov tseem ceeb kom ntseeg tau tias cov xis mas tau teeb tsa kom zoo thiab tsis muaj xau.
Tag
Cementing yog ib qho tseem ceeb heev kauj ruam nyob rau hauv ensuring lub sij hawm kev nyab xeeb ntev thiab ruaj khov ntawm cov roj zoo. Thaum cov txheej txheem nws tus kheej yuav zoo li yooj yim, kev ua tiav kev ua tiav yuav tsum tau npaj kev ua tib zoo, ua tiav, thiab saib xyuas. Los ntawm kev nkag siab cov txheej txheem cementing, cov khoom siv xiss, thiab cov neeg ua haujlwm tuaj yeem txhim kho qhov ua tiav ntawm lawv cov haujlwm ua haujlwm thiab ua kom muaj kev ncaj ncees ntawm kev ua haujlwm.
