Shale inhibitor, tseem hu ua anti-collapse tus neeg saib xyuas, feem ntau yog siv los npaj cov inhibitory hom drilling kua. Thaum drilling mus rau hauv av shale tsim, inhibit nws hydration expansion thiab ua kom lub phab ntsa zoo ruaj khov.
Feem ntau siv shale inhibitors yog:
Asphalt-type shale inhibitors
Ua ntej drilling hauv shale, muab cov dej drilling nrog ntuj asphalt hmoov, thaum drilling nyob rau hauv shale tsim, yog hais tias lub softening point ntawm asphalt thiab phim lub tsim kub, zoo siab sib txawv kev txiav txim nyob rau hauv lub wellbore, asphalt tuaj yeem tsim cov yas ntws, nyem rau hauv shale pore. Thiab kev ua kom tawg, ntim cov kab nrib pleb thiab txhim kho cov yeeb yaj kiab av nkos thiab cov khoom siv av nplaum sab nraud thiab cov khoom noj uas tawv, uas ua rau nws nyuaj rau kev ntxuav, thiaj li tiv thaiv dej los ntawm kev nkag mus rau hauv lub tsim thiab ua si lub luag hauj lwm ntawm stabilizing lub borehole phab ntsa.
Asphalt yog qhov seem ntawm cov roj crude refining. Tom qab qee qhov kev ua ntawm asphalt, nws tuaj yeem ua rau asphalt shale inhibitors rau cov kua dej drilling, suav nrog oxidized asphalt, sulphonated asphalt thiab KAHM uas feem ntau hu ua siab hloov asphalt hmoov.
2. Potassium ntsev thiab humic acids
Nws cov khoom muaj xws li potassium humic acid (KHm), nitrocellulose potassium humic acid (MHP), sulfnated potassium humic acid, potassium silicone humic acid, potassium aluminium humic acid, aluminium humic acid thiab aluminium silicon humic acid, thiab lwm yam.
3. Cationic av nkos shale inhibitors
Cationic shale inhibitor (tseem hu ua av nplaum stabilizer), daim ntawv thov daim teb tam sim no yog epoxy-propyl trimethyl ammonium chloride, feem ntau hu ua cation me me.
Me cation inhibition khib nyiab dispersion nyhuv yog zoo dua li KCl, qhov zoo yog nyob rau hauv hais tias cov cuttings nto adsorbed nrog me cation muaj tej yam hydrophobicity, uas tsis yooj yim rau ua raws li nto ntawm laum ntsis, xyaum dab tshos thiab laum yeeb nkab.
Cov cations me me muaj qee yam kab mob bactericidal, uas tuaj yeem tiv thaiv biodegradation ntawm qee cov tshuaj kho mob;
Cov cations me me tsis cuam tshuam rau cov pob zeb hauv av ntawm cov dej drilling kom pom tseeb, thiab muaj qhov zoo ntawm kev txo cov electrochemical corrosion ntawm cov cuab yeej drilling downhole.
4. Amphoteric ion inhibitors
Lub polymer molecule tau txhim kho lub peev xwm adsorption ntawm drilling cuttings, thiab muaj peev xwm neutralize ib feem ntawm qhov tsis zoo nqi ntawm drilling cuttings, yog li nws muaj ib tug muaj zog muaj peev xwm los inhibit drilling cuttings dispersion.
