IHydroxyethylcellulose (HEC) i-nonionic, i-polymer encibilika emanzini etholakala ku-cellulose ngochungechunge lokusabela kwamakhemikhali. Isetshenziswa kakhulu ezimbonini ezahlukahlukene, kubandakanya imboni kawoyela negesi, idlala indima ebalulekile ekubholeni nasekuqedeni uketshezi. Kulo mongo, i-HEC isebenza njenge-rheology modifier, i-ejenti yokulawula ukugeleza, kanye ne-tackifier, esiza ukuthuthukisa ukusebenza kahle okuphelele nempumelelo yokusebenza kwendawo kawoyela.
1. Isingeniso se-Hydroxyethyl Cellulose (HEC)
IHydroxyethylcellulose iphuma ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo. Ukwethulwa kwamaqembu e-hydroxyethyl ngokuguqulwa kwamakhemikhali kuthuthukisa ukuncibilika kwawo kwamanzi, okuwenza abe inhlanganisela eguquguqukayo elungele ukusetshenziswa okuhlukahlukene. Embonini kawoyela negesi, i-HEC ihlonishwa ngezakhiwo zayo ze-rheological, ukuzinza, nokuhambisana nezinye izithasiselo ezisetshenziswa ekubholeni uketshezi.
2. Ukusebenza kwe-HEC okuhlobene nezicelo ze-oilfield
2.1. Ukuncibilika kwamanzi
Ukuncibilika kwamanzi kwe-HEC kuyisici esibalulekile sokusetshenziswa kwayo kwendawo kawoyela. Ukuncibilika kwamanzi kwe-polymer kwenza kube lula ukuxutshwa nezinye izithako zoketshezi lokumba futhi kuqinisekisa ukusatshalaliswa okulinganayo ngaphakathi kwesistimu yoketshezi.
2.2. Ukulawulwa kwe-Rheology
Omunye wemisebenzi eyinhloko ye-HEC ku-oilfield fluids ukulawula i-rheology. Ishintsha i-viscosity yoketshezi futhi inikeza ukuzinza ngaphansi kwezimo ezihlukene ze-downhole. Lesi sakhiwo sibalulekile ekugcineni izici zokugeleza ezidingekayo zoketshezi lokumba kuyo yonke inqubo yokumba.
2.3. Ukulawula ukulahlekelwa kwamanzi
I-HEC iyi-ejenti esebenzayo yokulawula ukulahleka kwamanzi. Isiza ekuvimbeleni ukulahlekelwa uketshezi lokumba ekwakhekeni ngokwenza umgoqo ovikelayo ezindongeni zomthombo. Lesi sakhiwo sibalulekile ekuzinzeni kwe-wellbore kanye nokunciphisa umonakalo wokwakheka.
2.4. Ukuzinza okushisayo
Ukusebenza kwe-Oilfield kuvame ukuhlangana namazinga aphezulu okushisa. I-HEC izinzile ngokushisa futhi igcina ukusebenza kwayo kahle ekulawuleni i-rheology nokulahlekelwa uketshezi ngisho nangaphansi kwezimo zokushisa eziphakeme okuhlangatshezwana nazo ekubhojweni komthombo ojulile.
2.5. Ukuhambisana nezinye izithasiselo
I-HEC iyahambisana nezinhlobonhlobo zezithasiselo ezivame ukusetshenziselwa uketshezi lokumba, njengosawoti, ama-surfactants namanye ama-polymer. Lokhu kuhambisana kuthuthukisa ukuguquguquka kwayo futhi kuvumela amasistimu oketshezi okumba ngokwezifiso ukuthi akhiwe ngokusekelwe ezimeni ezithile zomthombo.
3. Ukufaka uketshezi endaweni kawoyela
3.1. Uketshezi lokumba
Ngesikhathi sokusebenza kokumba, i-HEC yengezwa oketshezini lokumba ukuze kuzuzwe izakhiwo ezinhle ze-rheological. Isiza ukulawula i-viscosity yoketshezi, iqinisekisa ukuthuthwa okuphumelelayo kwezinsimbi zokubhoboza phezulu kanye nokuvimbela izinkinga zokungaqini kahle kwe-wellbore.
3.2. Uketshezi lokuqeda
I-HEC ingasetshenziswa njenge-ejenti yokulawula ukuhlunga ekuqedeni uketshezi olusetshenziswa ngesikhathi sokuqedwa kahle nokusebenza kokusebenza. Yakha umgoqo odongeni lomthombo, okusiza ukugcina udonga oluqinile futhi luvimbele ukulimala kokwakheka okuzungezile.
3.3. Uketshezi oluqhekekayo
Ku-hydraulic fracturing, i-HEC ingasetshenziselwa ukuguqula izakhiwo ze-rheological ze-fracturing fluid. Isiza ekumisweni okushelelayo nasekuthuthweni, okunomthelela empumelelweni yenqubo yokuqhekeka kanye nokudala inethiwekhi esebenzayo yokuphuka.
4. Ukucatshangelwa kokwakhiwa
4.1. Gxila
Ukugxila kwe-HEC oketshezini lokumba kuyipharamitha ebalulekile. Kufanele ithuthukiswe ngokusekelwe ezimeni ezithile zemithombo yamanzi, izidingo zoketshezi kanye nokuba khona kwezinye izithasiselo. Ukusebenzisa ngokweqile noma ukugxilisa ingqondo okwanele kungaphazamisa ukusebenza koketshezi.
4.2. Inqubo yokuhlanganisa
Izinqubo zokuxuba ezifanele zibalulekile ukuze kuqinisekiswe ukuhlakazwa okufanayo kwe-HEC oketshezini lokumba. Ukuxuba okungaphelele kungabangela izakhiwo zamanzi ezingalingani, okuthinta ukusebenza okuphelele koketshezi lokumba.
4.3. Ikhwalithi yokulawula
Izinyathelo zokulawula ikhwalithi zibalulekile ekukhiqizeni nasekusetshenzisweni kwe-HEC ekusetshenzisweni kwendawo yamafutha. Ukuhlolwa okuqinile kufanele kwenziwe ukuze kuqinisekiswe ukusebenza kwe-polymer nokuqinisekisa ukusebenza okungaguquki.
5. Ukucatshangelwa kwemvelo nokuphepha
5.1. I-Biodegradability
I-HEC ngokuvamile ibhekwa njenge-biodegradable, okuyisici esibalulekile ekuhloleni umthelela wayo kwezemvelo. I-Biodegradability inciphisa umthelela wesikhathi eside ongaba khona we-HEC endaweni ezungezile.
5.2. Impilo nokuphepha
Nakuba i-HEC ibhekwa njengephephile ukuze isetshenziswe ekusetshenzisweni kwendawo yamafutha, izinqubo zokuphatha ezifanele kufanele zilandelwe ukuvimbela ukuchayeka. I-Material Safety Data Sheet (MSDS) inikeza ulwazi olubalulekile mayelana nokuphathwa okuphephile nokusetshenziswa kwe-HEC.
6. Izitayela zesikhathi esizayo nezinto ezintsha
Imboni kawoyela negesi iyaqhubeka nokufuna izindlela ezintsha zokuthuthukisa ukusebenza kahle kokumba kanye nokunciphisa umthelela wendawo. Ucwaningo oluqhubekayo lugxile ekwakheni ama-polymer amasha anezakhiwo ezithuthukisiwe kanye nokuhlola ezinye izindlela ezisimeme kunezithako ezijwayelekile zokumba uketshezi.
7. Isiphetho
IHydroxyethylcellulose idlala indima ebalulekile embonini kawoyela negesi, ikakhulukazi ekubholeni nasekuqedeni ukwakheka koketshezi. Inhlanganisela yayo eyingqayizivele yokulawula i-rheology, ukuvimbela ukulahlekelwa uketshezi kanye nokuhambisana nezinye izithasiselo kuyenza ibe yingxenye ebalulekile ekuqinisekiseni ukusebenza okuphumelelayo nokusebenza kahle kwe-oilfield. Njengoba ubuchwepheshe buthuthuka, ucwaningo oluqhubekayo nentuthuko lungase luholele ekuthuthukisweni okwengeziwe kwe-HEC kanye nokwakhiwa koketshezi lokumba, ngaleyo ndlela kusize ekuhloleni okusimeme nokunesibopho kwemithombo kawoyela negesi.
Isikhathi sokuthumela: Dec-02-2023