Hydroxyethylcellulose (HEC) yog ib qho nonionic, dej-soluble polymer muab los ntawm cellulose los ntawm ntau cov tshuaj tiv thaiv. Nws yog dav siv nyob rau hauv ntau yam lag luam, nrog rau kev lag luam roj thiab roj, ua lub luag haujlwm tseem ceeb hauv kev drilling thiab ua tiav cov kua dej. Hauv cov ntsiab lus no, HEC ua tus hloov kho rheology, tus neeg saib xyuas kev khiav dej num, thiab tackifier, pab txhim kho tag nrho cov txiaj ntsig thiab kev ua tiav ntawm kev ua haujlwm ntawm cov roj av.
1.Introduction to Hydroxyethyl Cellulose (HEC)
Hydroxyethylcellulose yog ib tug derivative ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Kev taw qhia txog cov pab pawg hydroxyethyl los ntawm kev hloov tshuaj lom neeg txhim kho nws cov dej solubility, ua rau nws muaj ntau yam sib xyaw haum rau ntau yam kev siv. Hauv kev lag luam roj thiab roj, HEC muaj nuj nqis rau nws cov khoom rheological, kev ruaj ntseg, thiab kev sib raug zoo nrog lwm cov khoom siv ntxiv hauv cov kua dej drilling.
2. Kev ua tau zoo ntawm HEC ntsig txog kev siv roj av
2.1. Dej solubility
Cov dej solubility ntawm HEC yog cov yam ntxwv tseem ceeb rau nws cov kev siv roj av. Lub polymer cov dej solubility ua rau nws yooj yim mus sib tov nrog lwm cov khoom xyaw drilling kua thiab xyuas kom meej txawm faib nyob rau hauv lub kua system.
2.2. Rheology tswj
Ib qho ntawm cov haujlwm tseem ceeb ntawm HEC hauv cov dej hauv av yog los tswj rheology. Nws hloov lub viscosity ntawm cov kua thiab muab stability nyob rau hauv txawv downhole tej yam kev mob. Cov cuab yeej no yog qhov tseem ceeb rau kev tswj xyuas cov yam ntxwv ntawm cov dej drilling thoob plaws hauv txheej txheem drilling.
2.3. Kev tswj tsis tau dej
HEC yog tus neeg saib xyuas dej tsis zoo. Pab tiv thaiv kom tsis txhob poob ntawm cov dej drilling rau hauv kev tsim los ntawm kev tsim ib qho kev tiv thaiv ntawm cov phab ntsa zoo. Cov cuab yeej no tseem ceeb heev rau kev ruaj ntseg zoo thiab txo qis kev tsim kev puas tsuaj.
2.4. Thermal stability
Oilfield kev khiav haujlwm feem ntau ntsib qhov kub thiab txias. HEC yog thermally ruaj khov thiab tswj nws cov kev ua tau zoo hauv kev tswj rheology thiab cov kua dej poob txawm tias nyob rau hauv qhov kub thiab txias tau ntsib hauv qhov tob tob drilling.
2.5. Compatibility nrog lwm yam additives
HEC yog sib xws nrog ntau yam additives uas feem ntau siv hauv cov dej drilling, xws li ntsev, surfactants thiab lwm yam polymers. Qhov kev sib raug zoo no txhim kho nws txoj kev siv ntau yam thiab tso cai rau kev cai drilling kua tshuab los tsim raws li cov xwm txheej tshwj xeeb.
3. Daim ntawv thov nyob rau hauv cov roj av kua
3.1. Drilling kua
Thaum lub sijhawm ua haujlwm drilling, HEC tau ntxiv rau cov kua dej drilling kom ua tiav cov khoom zoo rheological. Nws pab tswj cov viscosity ntawm cov kua dej, kom ntseeg tau tias kev thauj mus los ntawm cov laum cuttings mus rau saum npoo thiab tiv thaiv cov teeb meem tsis ruaj khov.
3.2. Ua kua dej tiav
HEC tuaj yeem siv los ua tus neeg saib xyuas kev pom hauv cov kua ua tiav siv thaum ua tiav thiab ua haujlwm ua haujlwm. Nws tsim ib qho kev thaiv ntawm phab ntsa zoo, pab kom muaj kev ruaj ntseg ntawm phab ntsa thiab tiv thaiv kev puas tsuaj rau ib puag ncig formations.
3.3. Fracturing kua
Hauv hydraulic fracturing, HEC tuaj yeem siv los hloov kho cov khoom rheological ntawm cov kua fracturing. Nws pab txhawb nqa kev ncua thiab kev thauj mus los, ua rau muaj kev vam meej ntawm cov txheej txheem fracturing thiab tsim kom muaj kev sib koom tes zoo.
4. Formulation xav txog
4.1. Ua kom pom tseeb
Qhov concentration ntawm HEC nyob rau hauv cov kua drilling yog ib qho tseem ceeb parameter. Yuav tsum tau ua kom zoo raws li cov xwm txheej tshwj xeeb, cov dej yuav tsum tau ua thiab muaj lwm yam khoom ntxiv. Kev siv ntau dhau lossis tsis txaus siab tuaj yeem cuam tshuam rau kev ua haujlwm ntawm cov kua dej.
4.2. Cov txheej txheem sib tov
Cov txheej txheem sib xyaw kom raug yog qhov tseem ceeb los xyuas kom meej qhov sib txawv ntawm HEC hauv cov kua dej drilling. Kev sib xyaw tsis tiav tuaj yeem ua rau cov kua dej tsis sib xws, cuam tshuam rau kev ua haujlwm tag nrho ntawm cov dej drilling.
4.3. Kev tswj kom zoo
Kev tswj xyuas kev ua tau zoo yog qhov tseem ceeb rau kev tsim khoom thiab siv HEC hauv kev siv roj av. Kev sim nruj yuav tsum tau ua kom paub tseeb tias kev ua haujlwm ntawm polymer thiab ua kom muaj kev ua tau zoo ib yam.
5. Kev xav txog ib puag ncig thiab kev nyab xeeb
5.1. Biodegradability
HEC feem ntau suav tias yog biodegradable, uas yog ib qho tseem ceeb hauv kev ntsuam xyuas nws cov kev cuam tshuam ib puag ncig. Biodegradability txo cov peev xwm mus sij hawm ntev ntawm HEC rau ib puag ncig.
5.2. Kev noj qab haus huv thiab kev nyab xeeb
Thaum HEC pom tau tias muaj kev nyab xeeb rau kev siv hauv kev siv roj av, cov txheej txheem tuav kom raug yuav tsum tau ua raws li kev tiv thaiv raug. Cov Ntaub Ntawv Kev Nyab Xeeb Cov Ntaub Ntawv (MSDS) muab cov ntaub ntawv tseem ceeb txog kev tuav pov hwm kev nyab xeeb thiab siv HEC.
6. Cov tiam tom ntej thiab kev tsim kho tshiab
Kev lag luam roj thiab roj txuas ntxiv mus nrhiav kev tsim kho tshiab los txhim kho kev ua haujlwm drilling thiab txo qhov cuam tshuam ib puag ncig. Kev tshawb fawb tsis tu ncua yog tsom rau kev tsim cov polymers tshiab nrog cov khoom zoo dua qub thiab tshawb nrhiav cov kev hloov pauv hloov mus rau ib txwm siv cov kua dej ntxiv.
7. Cov lus xaus
Hydroxyethylcellulose ua lub luag haujlwm tseem ceeb hauv kev lag luam roj thiab roj, tshwj xeeb tshaj yog nyob rau hauv drilling thiab ua tiav cov kua formulations. Nws qhov tshwj xeeb ua ke ntawm rheology tswj, kev tiv thaiv dej tsis zoo thiab kev sib raug zoo nrog lwm cov tshuaj ntxiv ua rau nws yog ib qho tseem ceeb hauv kev ua kom muaj kev vam meej thiab ua haujlwm zoo. Raws li thev naus laus zis, txuas ntxiv kev txhim kho thiab cov kua dej tsis yeem, yog li kev tshawb nrhiav hauv cov roj thiab roj peev.
Post lub sij hawm: Dec-02-2023