Kev siv thiab kev siv HEC hauv kev ua haujlwm roj thiab roj

Hydroxyethyl Cellulose (HEC) ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm roj thiab roj. Raws li cov khoom siv polymer ntau, nws tau siv dav hauv cov dej drilling, cov kua ua tiav, cov kua dej tawg thiab lwm yam. Nws cov ntawv thov thiab kev siv feem ntau yog cuam tshuam hauv cov hauv qab no:

1. Kev siv cov dej drilling

ib. Thickener
Feem ntau siv HEC hauv cov kua dej drilling yog ua cov thickener. Drilling kua ( av nkos ) yuav tsum muaj ib qho viscosity los xyuas kom meej tias cov laum cuttings yog nqa mus rau saum npoo thaum lub sij hawm drilling kom tsis txhob txhaws lub qhov dej. HEC tuaj yeem ua kom cov viscosity ntawm cov kua dej drilling, muab kev ncua zoo thiab muaj peev xwm nqa tau.

b. Phab ntsa-tsev tus neeg saib xyuas
Thaum lub sijhawm drilling txheej txheem, kev ruaj ntseg ntawm phab ntsa zoo yog qhov tseem ceeb. HEC tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov dej drilling thiab tsim cov txheej tuab ntawm cov av nkos ntawm cov phab ntsa zoo kom tsis txhob muaj cov phab ntsa ntub dej lossis cov dej ntws zoo. Qhov kev tsim cov phab ntsa no tsis yog tsuas yog txhim kho kev ruaj ntseg ntawm phab ntsa zoo, tab sis kuj txo qhov poob ntawm cov dej drilling, yog li txhim kho kev ua haujlwm ntawm drilling.

c. Rheology hloov kho
HEC muaj cov khoom zoo rheological thiab tuaj yeem kho cov khoom rheological ntawm cov kua dej drilling. Los ntawm kev kho qhov concentration ntawm HEC, tus nqi tawm los thiab viscosity ntawm cov dej drilling tuaj yeem tswj tau, uas yog qhov tseem ceeb rau kev ua haujlwm zoo drilling.

2. Kev siv cov kua ua tiav

ib. Zoo phab ntsa stability tswj
Cov kua ua kom tiav yog cov kua siv los ua kom tiav cov haujlwm drilling thiab npaj rau kev tsim khoom. Raws li cov khoom tseem ceeb hauv cov kua ua tiav, HEC tuaj yeem tswj tau qhov ruaj khov ntawm phab ntsa zoo. Cov khoom thickening ntawm HEC pab kom nws tsim cov kua dej ruaj khov hauv cov kua ua tiav, yog li muab kev txhawb nqa zoo.

b. Tswj permeability
Thaum lub sij hawm ua tiav cov txheej txheem zoo, HEC tuaj yeem tsim lub ncuav mog qab zib tuab uas tiv thaiv cov kua dej los ntawm kev nkag mus rau hauv kev tsim. Cov yam ntxwv no tseem ceeb heev los tiv thaiv kev tsim kev puas tsuaj thiab ua kom zoo, thiab ua kom txoj kev ua tiav ntawm kev ua tiav.

c. Kev tswj tsis tau dej
Los ntawm kev tsim ib qho av nkos ncuav mog qab zib, HEC tuaj yeem txo cov kua dej thiab ua kom muaj kev siv cov kua dej tiav. Qhov no pab txo cov nqi khiav lag luam thiab ua kom muaj kev tsim kho du.

3. Kev siv cov kua dej tawg

ib. Thickener
Hauv kev ua haujlwm hydraulic fracturing, cov kua fracturing yuav tsum nqa proppant (xws li cov xuab zeb) mus rau hauv cov pob txha ntawm kev tsim los txhawb cov pob txha thiab ua kom cov roj thiab cov kav dej qhib. Raws li ib tug thickener, HEC tuaj yeem ua rau kom cov viscosity ntawm cov kua fracturing thiab txhim khu nws cov xuab zeb nqa peev xwm, yog li txhim kho cov nyhuv fracturing.

b. Cross-linking agent
HEC kuj tseem tuaj yeem siv los ua tus neeg sawv cev sib txuas los tsim cov tshuab gel nrog ntau dua viscosity thiab lub zog los ntawm cov tshuaj tiv thaiv nrog lwm cov tshuaj. Cov txheej txheem gel no tuaj yeem txhim kho cov xuab zeb nqa lub peev xwm ntawm cov kua dej tawg thiab nyob ruaj khov ntawm qhov kub siab dua.

c. Degradation tswj tus neeg sawv cev
Tom qab kev ua haujlwm tawg tiav lawm, cov khoom seem hauv cov kua dej tawg yuav tsum tau muab tshem tawm kom rov qab zoo li qub permeability ntawm kev tsim. HEC tuaj yeem tswj cov txheej txheem degradation kom degrade cov kua fracturing rau hauv cov kua dej uas tsis muaj viscosity nyob rau lub sijhawm tshwj xeeb kom tshem tawm tau yooj yim.

4. Kev tiv thaiv ib puag ncig thiab kev ruaj ntseg

Raws li cov khoom siv dej-soluble polymer, HEC muaj biodegradability zoo thiab ib puag ncig kev sib raug zoo. Muab piv nrog cov roj av-raws li cov khoom ua kom tuab, HEC muaj kev cuam tshuam tsawg dua rau ib puag ncig thiab muaj ntau dua nyob rau hauv txoj kab nrog kev tiv thaiv ib puag ncig thiab kev ruaj ntseg ntawm cov roj thiab roj niaj hnub ua haujlwm.

Kev siv dav dav ntawm hydroxyethyl cellulose hauv cov roj thiab roj ua haujlwm yog vim nws cov thickening zoo heev, phab ntsa-tsev, rheological hloov kho thiab lwm yam haujlwm. Tsis tsuas yog nws txhim kho kev ua haujlwm ntawm drilling thiab ua tiav cov kua dej, nws tseem ua lub luag haujlwm tseem ceeb hauv cov kua dej tawg, txhim kho kev ua haujlwm zoo thiab kev nyab xeeb. Nrog rau kev txhim kho ntawm kev tiv thaiv ib puag ncig, HEC, raws li cov khoom siv zoo ib puag ncig, muaj kev thov dav dua.