CMC thiab PAC ua haujlwm li cas hauv kev lag luam roj?

Sodium carboxymethyl cellulose (CMC) thiab polyanionic cellulose (PAC) yog ob qho tib si dav siv hauv kev lag luam roj, tshwj xeeb tshaj yog nyob rau hauv drilling thiab ua tiav kua. Lawv ua lub luag haujlwm tseem ceeb vim lawv lub peev xwm los hloov kho cov khoom rheological, tswj cov kua dej tsis zoo, thiab txhim kho kev ruaj ntseg zoo. Nov yog li cas CMC thiab PAC siv hauv kev lag luam roj:

1. Drilling Fluid Additives:
   • CMC thiab PAC feem ntau yog siv los ua cov khoom ntxiv hauv cov dej hauv cov dej drilling los tswj cov khoom rheological xws li viscosity, yield point, thiab kua dej poob.
   • Lawv ua raws li viscosifiers, ua kom cov viscosity ntawm cov dej drilling kom thauj cov laum txiav mus rau saum npoo thiab tswj kev ruaj ntseg zoo.
   • Tsis tas li ntawd, lawv pab tswj cov kua dej los ntawm kev tsim cov ncuav mog qab zib nyias, impermeable lim rau ntawm phab ntsa ntawm lub qhov dej, txo cov dej poob rau hauv permeable formations thiab tswj hydrostatic siab.
2. Fluid Loss Control:
   • CMC thiab PAC yog cov neeg ua haujlwm tswj cov dej tsis zoo hauv cov dej drilling. Lawv tsim ib lub ncuav mog qab zib nyias, resilient filter ncuav mog qab zib rau ntawm phab ntsa wellbore, txo cov permeability ntawm kev tsim thiab txo cov dej poob rau hauv cov pob zeb ib puag ncig.
   • Los ntawm kev tswj cov kua dej poob, CMC thiab PAC pab kom muaj kev ruaj ntseg zoo, tiv thaiv kev tsim kev puas tsuaj, thiab ua kom zoo dua qhov drilling efficiency.
3. Shale Inhibition:
   • Nyob rau hauv shale formations, CMC thiab PAC pab inhibit av nplaum o thiab dispersion, txo txoj kev pheej hmoo ntawm wellbore instability thiab daig yeeb nkab teeb meem.
   • Lawv tsim ib qho kev tiv thaiv kev tiv thaiv ntawm qhov chaw shale, tiv thaiv dej thiab ions los ntawm kev cuam tshuam nrog cov av nplaum ntxhia thiab txo qhov o thiab tawg paj.
4. Fracturing Fluids:
   • CMC thiab PAC kuj tseem siv rau hauv hydraulic fracturing (fracking) kua los hloov cov kua viscosity thiab tshem tawm cov khoom siv.
   • Lawv pab thauj proppant mus rau hauv lub pob txha tawg thiab tswj qhov xav tau viscosity rau kev tso chaw zoo thiab kev puas tsuaj.

sodium carboxymethyl cellulose (CMC) thiab polyanionic cellulose (PAC) ua lub luag haujlwm tseem ceeb hauv kev lag luam roj los ntawm kev hloov kho qhov drilling thiab ua tiav cov kua dej kom ua tiav qhov kev ua tau zoo, txhim khu kev ruaj ntseg zoo, tswj cov dej tsis zoo, thiab txo qhov tsim kev puas tsuaj. Lawv lub peev xwm los hloov kho rheological zog, inhibit shale o, thiab tshem tawm cov khoom ua rau lawv indispensable additives nyob rau hauv ntau yam oilfield ua hauj lwm.