Ungazi njani uvavanyo lweemodeli ze-PDC bit ROP kunye nefuthe lamandla elitye kwii-coefficients zemodeli?

Isishwankathelo

Iimeko zangoku zexabiso leoyile eliphantsi zivuselele ugxininiso ekuphuculeni ukubhola ukuze kongiwe ixesha ukubhola imithombo yeoyile negesi kunye nokunciphisa iindleko zokusebenza. Imodeli yezinga lokungena (ROP) sisixhobo esibalulekileyo ekuphuculeni iiparameter zokubhola, oko kukuthi ubunzima be-bit kunye nesantya esijikelezayo kwiinkqubo zokubhola ezikhawulezayo. Ngesixhobo esitsha, esizenzekelayo sokubona idatha kunye nesixhobo sokumodela se-ROP esiphuhliswe kwi-Excel VBA, ROPPlotter, lo msebenzi uphanda ukusebenza kwemodeli kunye nempembelelo yamandla elitye kwii-coefficients zemodeli zeemodeli ezimbini ezahlukeneyo ze-PDC Bit ROP: uHareland noRampersad (1994) kunye noMotahhari et al. (2010). Ezi zimbini I-PDC bit Iimodeli zithelekiswa nesiseko, ulwalamano oluqhelekileyo lwe-ROP oluphuhliswe nguBingham (1964) kwiindlela ezintathu ezahlukeneyo zesanti kwicandelo elithe nkqo lequla elithe tyaba le-Bakken shale. Okokuqala ngqa, kwenziwe umzamo wokwahlula isiphumo samandla ahlukeneyo elitye kwii-coefficients zemodeli ye-ROP ngokuphanda ii-lithologies ezineeparamitha zokubhola ezifanayo. Ukongeza, kwenziwa ingxoxo ebanzi ngokubaluleka kokukhetha imida yee-coefficients zemodeli ezifanelekileyo. Amandla elitye, abalwa kwiimodeli zikaHareland noMotahhari kodwa kungekhona kwiBingham, aphumela kwixabiso eliphezulu lee-coefficients zemodeli eziphindaphindayo rhoqo kwiimodeli zangaphambili, ukongeza kwi-exponent ye-RPM eyongeziweyo yemodeli kaMotahhari. Imodeli kaHareland noRampersad iboniswa ukuba isebenza kakuhle kwiimodeli ezintathu ngale seti yedatha ethile. Ukusebenza kunye nokusebenza kwemodeli ye-ROP yendabuko kuyabuzwa, njengoko iimodeli ezinjalo zixhomekeke kwiseti yee-coefficients ezisebenza ngokubonakalayo ezibandakanya isiphumo sezinto ezininzi zokubhola ezingabalwanga kwifomyula yemodeli kwaye zahlukile kwi-lithology ethile.

Intshayelelo

Iibhithi zePDC (Polycrystalline Diamond Compact) zezona bhithi zisetyenziswa kakhulu kwimigodi yeoyile negesi yokugrumba namhlanje. Ukusebenza kweebhithi kudla ngokulinganiswa ngesantya sokungena (ROP), uphawu lokuba iqula ligrunjwa ngokukhawuleza kangakanani ngokwexesha lobude bemingxunya egrunjwayo ngeyunithi nganye. Ukulungiswa kokugrumba kube phambili kwii-ajenda zeenkampani zamandla kangangeminyaka emininzi ngoku, kwaye kuzuza ukubaluleka ngakumbi ngexesha langoku lexabiso eliphantsi leoyile (Hareland and Rampersad, 1994). Inyathelo lokuqala lokuphucula iiparameter zokugrumba ukuvelisa iROP engcono kakhulu kukuphuhliswa kwemodeli echanekileyo enxulumene nokulinganisa okufunyenwe kumphezulu ukuya kwisantya sokugrumba.

Iimodeli ezininzi ze-ROP, kuquka iimodeli ezenzelwe uhlobo oluthile lwebhithi, ziye zapapashwa kwiincwadi. Ezi modeli ze-ROP zihlala ziqulathe inani lee-coefficients ezixhomekeke kwi-lithology kwaye zinokuphazamisa ukuqonda ubudlelwane phakathi kweeparamitha zokumba kunye nesantya sokungena. Injongo yolu phononongo kukuhlalutya ukusebenza kwemodeli kunye nendlela ii-coefficients zemodeli ezisabela ngayo kwidatha yentsimi ngeeparamitha zokumba ezahlukeneyo, ngakumbi amandla elitye, ezimbini.I-PDC bit iimodeli (Hareland and Rampersad, 1994, Motahhari et al., 2010). Ii-coefficients zemodeli kunye nokusebenza kwazo zithelekiswa nemodeli yesiseko se-ROP (Bingham, 1964), ulwalamano olulula olusebenze njengemodeli yokuqala ye-ROP esetyenziswa kakhulu kulo lonke ishishini kwaye isasetyenziswa okwangoku. Idatha yendawo yokumba kwiifom ezintathu zesanti ezinamandla ahlukeneyo elitye iyaphandwa, kwaye ii-coefficients zemodeli zezi modeli zintathu ziyabalwa kwaye zithelekiswa. Kucingelwa ukuba ii-coefficients zeemodeli zikaHareland kunye neMotahhari kwifom nganye yelitye ziya kudlula uluhlu olubanzi kunee-coefficients zemodeli zikaBingham, njengoko amandla ahlukeneyo elitye engabalwa ngokucacileyo kwifom yokugqibela. Ukusebenza kwemodeli nako kuyavavanywa, okukhokelela ekukhethweni kwemodeli ye-ROP engcono kakhulu kummandla we-Bakken shale eMntla Dakota.

Iimodeli ze-ROP eziqukwe kulo msebenzi ziquka ii-equations ezingaguqukiyo ezinxulumanisa iiparameter ezimbalwa zokumba kunye nesantya sokumba kwaye ziqulathe iseti yee-coefficients ezibonisa amandla okusebenzisa iindlela zokumba ezinzima, ezifana nee-hydraulics, ukusebenzisana kwe-cutter-rock, uyilo lwe-bit, iimpawu zokuhlanganisa umngxuma osezantsi, uhlobo lodaka, kunye nokucoca imingxunya. Nangona ezi modeli ze-ROP zemveli ngokubanzi zingasebenzi kakuhle xa zithelekiswa nedatha yentsimi, zibonelela ngelitye elibalulekileyo lokunyuka kwiindlela ezintsha zokumisela imodeli. Iimodeli zanamhlanje, ezinamandla ngakumbi, ezisekelwe kwizibalo ezinokuguquguquka okwandisiweyo zinokuphucula ukuchaneka kokumisela i-ROP. UGandelman (2012) uxele ngophuculo olukhulu kumodeli ye-ROP ngokusebenzisa iinethiwekhi ze-neural zokwenziwa endaweni yeemodeli ze-ROP zemveli kwimithombo yeoyile kwiindawo zangaphambi kwetyuwa eBrazil. Iinethiwekhi ze-neural zokwenziwa nazo zisetyenziswa ngempumelelo ekuqikeleleni i-ROP kwimisebenzi kaBilgesu et al. (1997), Moran et al. (2010) kunye no-Esmaeili et al. (2012). Nangona kunjalo, olo phuculo kumodeli ye-ROP luza ngexabiso lokutolikwa kwemodeli. Ke ngoko, iimodeli ze-ROP zemveli zisasebenza kwaye zibonelela ngendlela esebenzayo yokuhlalutya indlela iparameter ethile yokubhoboza echaphazela ngayo izinga lokungena.

I-ROPPlotter, isoftware yokubona idatha yentsimi kunye ne-ROP modeling software eyenziwe kwiMicrosoft Excel VBA (Soares, 2015), isetyenziswa ekubaleni ii-coefficients zemodeli kunye nokuthelekisa ukusebenza kwemodeli.