I-Hydroxyethyl Cellulose (HEC) idlala indima ebalulekileyo ekusebenzeni kweoli kunye negesi. Njengesixhobo sepolymer esebenzayo, isetyenziswa ngokubanzi kulwelo lokomba, ulwelo olugqityiweyo, ulwelo oluqhekezayo kunye nezinye iindawo. Ukusetyenziswa kunye nokusetyenziswa kwayo kubonakaliswa ikakhulu kule miba ilandelayo:
1. Ukusetyenziswa kolwelo lokomba
a. Ukutyeba
Olona setyenziso luxhaphakileyo lwe-HEC ekugrumbeni ulwelo lufana ne-thickener. Ulwelo lwe-drilling (udaka) lufuna ukuba ne-viscosity ethile ukuqinisekisa ukuba i-drill cuttings iqhutyelwa phezulu ngexesha lokomba ukuphepha ukuvala umthombo. I-HEC inokunyusa kakhulu i-viscosity ye-drilling fluid, inika ukumiswa kakuhle kunye nokuthwala amandla.
b. Iarhente yokwakha udonga
Ngexesha lenkqubo yokomba, ukuzinza kodonga lomthombo kubalulekile. I-HEC inokuphucula ukusebenza kweplagi yolwelo lokomba kwaye yenze umaleko oshinyeneyo wekeyiki yodaka eludongeni lomthombo ukunqanda ukudilika kodonga okanye ukuvuza kakuhle. Esi siphumo sokwakhiwa kweendonga asiphuculi nje kuphela ukuzinza kodonga lomthombo, kodwa kunciphisa ukulahleka kwamanzi okugaya, ngaloo ndlela kuphuculwe ukusebenza kakuhle.
c. Isilungisi seRheology
I-HEC ineempawu ezintle ze-rheological kwaye inokulungelelanisa iimpawu ze-rheological zokucoca ulwelo. Ngokulungelelanisa ukugxininiswa kwe-HEC, ixabiso lesivuno kunye ne-viscosity ye-drilling fluid inokulawulwa, eyona nto ibalulekileyo ekusebenzeni ngokufanelekileyo.
2. Ukusetyenziswa kolwelo lokugqibezela
a. Well udonga uzinzo ulawulo
Ulwelo lokugqibezela lulwelo olusetyenziselwa ukugqibezela imisebenzi yokomba nokulungiselela imveliso. Njengenxalenye ephambili ekugqityweni kwamanzi, i-HEC inokulawula ngokufanelekileyo ukuzinza kodonga lomthombo. Iipropati ezityebileyo ze-HEC zivumela ukuba zenze ulwakhiwo oluzinzileyo lwe-fluid kulwelo olugqityiweyo, ngaloo ndlela lubonelela ngenkxaso efanelekileyo ye-wellbore.
b. Ulawulo lokungena
Ngethuba lenkqubo yokugqitywa komthombo, i-HEC inokwenza ikhekhe lodaka elixineneyo elithintela ulwelo ukuba lungene ekubunjweni. Olu phawu lubaluleke kakhulu ukuthintela umonakalo wokwakheka kunye nokuvuza kakuhle, kwaye iqinisekisa inkqubela phambili egudileyo yenkqubo yokugqiba.
c. Ukulawulwa kwelahleko yolwelo
Ngokwenza ikhekhe lodaka olusebenzayo, i-HEC inokunciphisa ukulahlekelwa kwamanzi kwaye iqinisekise ukusetyenziswa okusebenzayo kokugqiba ulwelo. Oku kunceda ukunciphisa iindleko zokusebenza kunye nokuqinisekisa ukwakhiwa okugudileyo.
3. Ukusetyenziswa kwe-fracturing fluid
a. Ukutyeba
Kwimisebenzi ye-hydraulic fracturing, i-fracturing fluid idinga ukuthwala i-proppant (efana nesihlabathi) kwi-fractures yokwakheka ukuxhasa iifractures kunye nokugcina i-oyile kunye ne-gas channels evulekile. Njenge-thickener, i-HEC inokunyusa i-viscosity ye-fracturing fluid kwaye iphucule umthamo wayo wokuthwala isanti, ngaloo ndlela iphucula umphumo we-fracturing.
b. I-arhente yokudibanisa
I-HEC ingasetyenziselwa njenge-agent edibanisayo ukwenza iinkqubo ze-gel kunye ne-viscosity ephezulu kunye namandla ngokusabela kunye nezinye iikhemikhali. Le nkqubo ye-gel inokuphucula umthamo wokuthwala isanti ye-fracturing fluid kwaye ihlale izinzile kumaqondo aphezulu.
c. I-arhente yokulawula ukuthotywa
Emva kokuba umsebenzi wokuqhawula ugqityiwe, iintsalela kwi-fracturing fluid kufuneka zisuswe ukubuyisela ukunyanzeliswa okuqhelekileyo kokubunjwa. I-HEC inokulawula inkqubo yokuthotywa kokunciphisa i-fracturing fluid ibe yi-low-viscosity fluid ngaphakathi kwexesha elithile lokususwa lula.
4. Ukhuseleko lokusingqongileyo kunye nozinzo
Njengomathiriyeli wepolymer enyibilikayo emanzini, i-HEC ine-biodegradability elungileyo kunye nokuhambelana kokusingqongileyo. Xa kuthelekiswa ne-thickeners ye-petroleum-based-thickeners, i-HEC inempembelelo encinci kwindalo kwaye ihambelana ngakumbi nokhuseleko lokusingqongileyo kunye neemfuno zokuzinza kwimisebenzi yanamhlanje yeoli kunye negesi.
Ukusetyenziswa okubanzi kwe-cellulose ye-hydroxyethyl kwimisebenzi ye-oyile kunye negesi ikakhulu ngenxa yokuqina kwayo okugqwesileyo, ukwakhiwa kodonga, ukuguqulwa kwe-rheological kunye neminye imisebenzi. Ayiphuculi nje kuphela ukusebenza kwe-drilling kunye nokugqiba ulwelo, ikwadlala indima ebalulekileyo kwi-fracturing fluids, ukuphucula ukusebenza kakuhle kunye nokhuseleko. Ngokuphuculwa kweemfuno zokusingqongileyo, i-HEC, njengento ehambelana nokusingqongileyo, inethuba elibanzi lokufaka isicelo.
Ixesha lokuposa: Jul-10-2024