Roj av-qib hydroxyethyl cellulose (HEC), ua ib qho tseem ceeb hauv dej-soluble polymer thickener, rheology modifier, thiab stabilizer, tau dhau los ua qhov muaj txiaj ntsig zoo hauv kev rho tawm roj thiab roj av hauv xyoo tas los no. Nrog rau kev nthuav dav ntawm cov qhov dej tob, cov qhov dej tob heev, thiab kev tshawb nrhiav roj thiab roj tsis zoo, kev thov siab dua tau muab tso rau ntawm kev ua tau zoo ntawm cov kua drilling, cov kua fracturing, thiab cov kua tiav. HEC, nrog nws cov solubility zoo heev, kev ruaj khov tshuaj lom neeg, thiab lub peev xwm thickening, tau dhau los ua ib qho tseem ceeb additive rau kev txhim kho kev ua haujlwm ntawm cov roj thiab roj av extraction.
HEC qib roj av muaj cov khoom zoo heev uas yaj tau dej thiab ua kom tuab, ua rau lub cev sib xws sai sai thaum npaj cov kua dej drilling, ua rau cov kua viscosity nce ntxiv, thiab ua rau lub peev xwm nqa tau cov txiav. Thaum lub sijhawm drilling, cov txiav hauv qab ntawm lub qhov dej yuav tsum tau tshem tawm zoo hauv qab qhov kub siab, siab siab, thiab cov xwm txheej ncig ceev ceev. HEC-thickened drilling fluid ua rau lub sijhawm ncua thiab kev thauj mus los zoo dua, nqa cov txiav mus rau lub qhov dej sai sai thiab zam kev pheej hmoo ntawm cov yeeb nkab drilling lo vim yog cov txiav sib sau ua ke ntawm qab ntawm lub qhov dej. Ntxiv mus, HEC muaj kev sib raug zoo nrog brine thiab dej hiav txwv, tswj kev ua haujlwm viscosity ruaj khov txawm tias nyob rau hauv cov chaw muaj salinity siab, ua rau nws tsim nyog rau cov platforms offshore thiab cov haujlwm tsim ua ke.
HEC kuj tseem ua lub luag haujlwm tseem ceeb hauv kev ua tiav thiab kev sib txuas cov kua dej. Nws txhim kho tus cwj pwm rheological ntawm cov kua dej, tswj kev poob kua dej tsawg thiab txhim kho qhov zoo ntawm cov ncuav mog qab zib lim. Lub ncuav mog qab zib lim zoo, nyias, thiab ntom zoo cais cov kua dej tsim, txo qhov puas tsuaj rau lub pas dej thiab ua kom muaj kev ruaj khov ntawm kev tsim khoom tom qab. Tsis tas li ntawd, HEC txhim kho qhov muaj peev xwm ua kua dej thiab proppant suspension ntawm cov kua dej tiav, txhawb kev ua haujlwm du thiab muaj kev nyab xeeb.
Hauv kev siv tshuab fracturing, roj av-qib HEC yog ib qho tseem ceeb ntawm cov kua fracturing ua haujlwm siab. Nws lub peev xwm thickening tso cai rau cov kua fracturing nqa ntau cov proppant mus rau hauv cov pob tawg tob, ua tiav kev hloov pauv reservoir zoo. Thaum lub sijhawm fracturing, qhov kub thiab lub zog shear siab heev, tab sis HEC tswj cov khoom viscoelastic zoo, txo cov xuab zeb settling thiab txhim kho kev txhawb nqa pob tawg. Ntawm qhov tod tes, HEC muaj cov yam ntxwv degradation tswj tau; tom qab kev tsim kho, nws tuaj yeem degrade nyob rau hauv cov xwm txheej tsim nyog, tso tawm ntawm cov pob tawg, txo qhov tsis kam rov qab, xyuas kom meej tias cov roj thiab roj ntws du, thiab yog li ua rau ntau lawm. Hais txog kev tiv thaiv ib puag ncig thiab kev nyab xeeb, HEC tsis muaj tshuaj lom, biodegradable, thiab tsis khaus, ua rau nws yog cov tshuaj ntsuab thiab tus phooj ywg ib puag ncig. Tawm tsam keeb kwm yav dhau los ntawm kev tsom mus rau lub zog ntsuab thiab kev txhim kho ruaj khov thoob ntiaj teb, HEC tsis yog tsuas yog ua tau raws li cov kev xav tau ib puag ncig tam sim no rau cov tshuaj oilfield tab sis kuj pab cov tuam txhab txhim kho lawv cov qib kev tswj hwm ib puag ncig. Piv nrog cov polymers hluavtaws ib txwm muaj, HEC muaj kev phooj ywg ib puag ncig zoo dua thiab kev nyab xeeb khaws cia thiab kev thauj mus los, ua rau muaj cov pa roj carbon tsawg dua thiab muaj kev nyab xeeb dua hauv kev tsim roj thiab roj.
Kev siv cov roj av qibHECkuj tau nthuav dav mus rau ntau qhov chaw, suav nrog kev txhim kho roj rov qab, kev tiv thaiv lub pas dej, thiab kev ua kom zoo dua ntawm kev ua haujlwm ntawm cov kua dej drilling. Nws qhov sib xws hauv cov kab ke kua sib txawv tso cai rau nws ua haujlwm synergistically nrog ntau yam surfactants, ntsev, thiab cov neeg sawv cev crosslinking los tsim cov kab ke tshuaj lom neeg ntau yam hauv cov roj av. Piv txwv li, hauv kev rho tawm roj hnyav, HEC tuaj yeem txhim kho rheology ntawm lub kaw lus txhaj tshuaj thiab ua kom muaj kev txhaj tshuaj zoo dua; hauv kev ua haujlwm roj qhov dej, HEC thickening system tuaj yeem nqa thiab ntws cov kua dej, txhim kho kev tsim khoom roj qhov dej.
Nrog nws cov thickening zoo heev, suspension, rheological adjustment properties, thiab cov yam ntxwv zoo rau ib puag ncig, roj av-qib HEC tau dhau los ua cov khoom siv tseem ceeb rau kev siv roj thiab roj niaj hnub zoo. Txawm hais tias nyob rau hauv drilling, cementing, fracturing, lossis ua tiav kev ua haujlwm, HEC tuaj yeem txhim kho cov txheej txheem ua haujlwm thiab kev nyab xeeb ua haujlwm, pab txhawb rau kev txhim kho zoo thiab kev siv cov peev txheej roj thiab roj.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-08-2025