Indima ye-polyacrylamide yezimboni ekukhishweni kukawoyela

Izakhiwo ze-polyacrylamide yezimboni zokuqina, i-flocculation kanye nokulawulwa kwe-rheological of fluids kwenza kube nendima ebalulekile ekukhiqizeni uwoyela.Isetshenziswa kabanzi ekubholeni, ukuxhuma amanzi, amanzi ane-asidi, ukuqhekeka, ukugeza kahle, ukuqeda kahle, ukunciphisa ukuhudula, ukulwa nesikali kanye nokufuduka kukawoyela.

Ngokuvamile, ukusetshenziswa kwe-polyacrylamide ukuthuthukisa izinga lokubuyisela uwoyela.Ikakhulukazi, amasimu kawoyela amaningi angenile emkhiqizweni wesibili nasezingeni eliphezulu, ukujula kwedamu ngokuvamile kungaphezu kuka-1000m, kanti okunye ukujula kwechibi kufika ku-7000m.Ukuhlukahluka kokwakhiwa kanye nezizinda zikawoyela zaphesheya kwezilwandle kubeke phambili izimo eziqinile zokuthola kabusha uwoyela.

Phakathi kwazo, ukukhiqizwa kawoyela okujulile nokukhiqizwa kukawoyela ogwini lwasolwandle ngokufanayo kubeka izidingo ezintsha ze-PAM, ezidinga ukuthi imelane ne-shear, izinga lokushisa eliphakeme (ngaphezu kuka-100 ° C kuya ku-200 ° C), i-calcium ion, ukumelana ne-magnesium ion, ukumelana nokuwohloka kwamanzi olwandle, kusukela ngawo-1980, inqubekelaphambili enkulu yenziwe ocwaningweni oluyisisekelo, ukulungiswa, ucwaningo lwesicelo kanye nokuthuthukiswa okuhlukahlukene kwe-PAM efanele ukubuyiswa kwamafutha phesheya.

I-Industrial Polyacrylamide isetshenziswa njengesilungisi sokumba uketshezi kanye nesengezo se-fracturing fluid:

I-polyacrylamide eyingxenye ye-hydrolyzed (HPAM), etholakala ku-hydrolysis ye-polyacrylamide, ivame ukusetshenziswa njengesilungisi sokumba uketshezi.Indima yawo ukulawula i-rheology yoketshezi lokumba, ukuthwala ukusikwa, ukugcoba i-drill bit, ukunciphisa ukulahlekelwa uketshezi, njll. kulula ukuthola indawo yokugcina amanzi kawoyela negesi, futhi ivumela ukubhoboza, isivinini sokumba siphezulu ngo-19% kunoketshezi oluvamile lokumba, futhi cishe ngo-45% ngaphezu kwezinga lokumba ngomshini.

Ngaphezu kwalokho, kunganciphisa kakhulu izingozi zokubhoboza okubambekile, kunciphise ukuguga kwemishini, futhi kuvimbele ukulahlekelwa nokuwa.Ubuchwepheshe be-fracturing buyisinyathelo esibalulekile sokuvuselela ukwakhiwa kwemibhede eqinile ezindaweni zikawoyela.I-Polyacrylamide crosslinked fracturing fluid isetshenziswa kabanzi ngenxa ye-viscosity yayo ephezulu, ukungqubuzana okuphansi, umthamo omuhle wesihlabathi omisiwe, ukuhlunga okuncane, ukuzinza okuhle kwe-viscosity, izinsalela ezincane, ukuhlinzekwa okubanzi, ukulungiselela okulula kanye nezindleko eziphansi.

Ekwelashweni kwe-fracturing kanye ne-acidizing, i-polyacrylamide ilungiswa ibe yisisombululo esinamanzi nge-concentration ye-0.01% kuya ku-4% futhi iphonswe ekubunjweni komhlaba ukuze iphule ukwakheka.Isixazululo sezimboni se-polyacrylamide sinomsebenzi wokujiya nokuthwala isihlabathi kanye nokunciphisa ukulahlekelwa uketshezi oluqhekekayo.Ngaphezu kwalokho, i-polyacrylamide inomphumela wokunciphisa ukumelana, ukuze ukulahlekelwa kokudluliswa kwengcindezi kungancishiswa.