Hauv oilwell cementing, kev tu kom zoo yog qhov tseem ceeb rau kev ua tiav cov cement sib txuas thiab ntev - lub sij hawm zonal cais.
Dab tsi yog ntxhua khaub ncaws hauvroj cementing additive?
Lub tshuab ntxhua khaub ncaws yog cov kua dej tshwj xeeb uas siv los tshem tawm cov av nkos, lim ncuav mog qab zib, thiab cov roj seem ntawm lub qhov dej ua ntej cementing, txhim kho cov cement adhesion thiab tiv thaiv kev sib txuas lossis kev sib txuas tsis ua haujlwm.
Vim li cas Cementing Operations xav tau cov neeg ua haujlwm ntxhua khaub ncaws?
Thaum lub sij hawm drilling, lub qhov dej ntawm lub qhov dej yuav coated nrog cov av nkos, roj -cov seem ntub dej, thiab lim ncuav mog qab zib.
Yog tias tsis tau muab tshem tawm ua ntej siv cov cement slurry, cov kab mob no tsim teeb meem ntawm cov cement thiab tsim los yog casing, ua rau kev sib raug zoo tsis zoo, micro-annulus, thiab muaj peev xwm hloov tau roj.
Cov tshuaj ntxhua khaub ncaws ua kom muaj zog ntxuav thiab ntub dej, ua kom huv si thiab dej -cov chaw ntub dej uas txhawb nqa kev tso cement thiab sealing.
Tus neeg ua haujlwm ntxhua khaub ncaws ua haujlwm li cas hauv cov txheej txheem cementing?
Cov tshuaj ntxuav feem ntau muaj surfactants, cov kuab tshuaj, thiab cov khoom tawg uas:
So thiab emulsify roj-raws li los yog hluavtaws av nkos residues
Disperse khoom hais thiab tshem tawm lim ncuav mog qab zib
Txo qhov nro ntawm lub ntsej muag kom txhim kho kev ua haujlwm huv
Hloov lub qhov dej ntawm qhov dej los ntawm cov roj- ntub mus rau dej- ntub
Cov txheej txheem no txhim kho cov cement slurry compatibility thiab bonding zoo.
Cov tshuaj ntxhua khaub ncaws siv nyob qhov twg?
Washing agents yog siv rau hauv:
Thawj cementing ntawm nto, nruab nrab, thiab ntau lawm casing
Lub qhov dej drilled nrog roj-raws li los yog hluavtaws drilling kua
HPHT qhov dej yuav tsum tau muaj zog cement sealing
Kev ua haujlwm thiab kev tso tseg
Cov qhov dej uas muaj kev pheej hmoo siab ntawm cov pa xa hluav taws xob lossis av nkos
Lawv feem ntau yog siv ua ntej ntawm cov kua dej spacer lossis ncaj qha ua ntej cement.
Dab tsi yog Cov Cheeb Tsam Yam Hauv Cov Tshuaj Ntxuav?
Common washing agent formulations yuav muaj xws li:
Surfactants (anionic, cationic, nonionic, amphoteric)
Cov kuab tshuaj los yog cov kuab tshuaj sib tov
Dispersants los yog detergents
Anti-sludge additives
Corrosion inhibitors
Cov dej- cov tshuaj ntub dej
Qhov tshwj xeeb muaj pes tsawg leeg nyob ntawm hom av nkos, qhov kub thiab txias, thiab kev xav tau ua haujlwm.
Cov txiaj ntsig zoo li cas Ua Cov Tshuaj ntxhua khaub ncaws muab rau Cementing?
Cov txiaj ntsig tseem ceeb muaj xws li:
Txhim kho kev ntxuav cov av nkos thiab lim ncuav mog qab zib
Kev txhim kho tseem ceeb hauv cement-wellbore bonding zog
Txo kev pheej hmoo ntawm channeling, gas migration, thiab micro-annulus
Tiv thaiv cov cement paug thiab slurry instability
Txhim kho ntev - lub sij hawm zonal cais kev ncaj ncees
Cov txiaj ntsig no ua rau cov kua dej ntxuav yog cov kauj ruam tseem ceeb hauv kev coj ua niaj hnub cementing.
Dab tsi yuav tsum tau txiav txim siab thaum xaiv tus ntxhua khaub ncaws?
Engineers yuav tsum ntsuas:
Mud system siv (WBM, OBM, SBM)
Reservoir kub thiab siab
Compatibility nrog spacer thiab cement slurry
Yuav tsum tau twj tso kua mis lub sij hawm thiab ntws tus nqi
Kev xav txog ib puag ncig thiab kev nyab xeeb
Kev soj ntsuam hauv chav kuaj xyuas kom pom qhov ua tau zoo thiab zam kev cuam tshuam tsis zoo nrog lwm cov tshuaj ntxiv.
Xaus
Cov tshuaj ntxhua khaub ncaws ua lub luag haujlwm tseem ceeb hauv kev npaj lub qhov dej rau cementing los ntawm kev tshem tawm cov kab mob thiab txhim kho qhov ntub dej.
Los ntawm kev ua kom huv si thiab ua kom zoo nyob hauv qhov chaw zoo, lawv txhim kho cov cement sib txuas, txhim kho zonal cais, thiab ua kom muaj kev nyab xeeb thiab ua tau zoo.
