Amasu Okucubungula Idatha Ye-Poststack Seismic
I-Pendahuluan
Ekuhloleni kwe-geophysical, idatha ye-seismic idlala indima ebalulekile ekusizeni ososayensi nonjiniyela baqonde isakhiwo esingaphansi komhlaba soMhlaba. Idatha ye-seismic isetshenziselwa ukuthola izinsiza zemvelo ezifana namafutha, igesi, namaminerali, kanye nokuhlolwa kwengozi ye-seismic kanye nocwaningo lwesayensi olujwayelekile. Enye indlela ebalulekile ekuhlaziyweni kwedatha ye-seismic ukucubungula idatha ye-poststack seismic. Lesi sihloko sizoxoxa ngokujulile ngokucubungula idatha ye-poststack seismic, ukuthi kungani ibalulekile, kanye nezindlela ezahlukene kanye nobuchwepheshe obuhilelekile kule nqubo.
Ukuqonda Ukucutshungulwa Kwedatha Ye-Poststack Seismic
Ukucubungula idatha ye-Poststack seismic kubhekisela kumasu ahlukahlukene okucubungula asetshenziswa kudatha ye-seismic ngemva kokufaka i-stacking. Ukufaka i-stacking kuyinqubo yokuhlanganisa izimpawu ezifanayo ze-seismic ezivela ezindleleni eziningi zokubonisa ukuze kuthuthukiswe isilinganiso sesignali-kuya-kumsindo. Idatha ehlanganisiwe ibe isicutshungulwa kusetshenziswa amasu ahlukahlukene e-poststack ukuze kuchazwe ngokunembe kakhudlwana.
Eminye yemigomo eyinhloko yokucubungula idatha ye-poststack seismic yile:
1. Thuthukisa ukuxazululwa kwendawo kanye nesikhathi kwedatha yokuzamazama komhlaba.
2. Nciphisa umsindo nezinto ezingasetshenziswa ngemuva kokufakwa kwenqwaba.
3. Lungiselela ukubonakala kwezakhiwo ezingaphansi komhlaba ukuze kuhlaziywe futhi kuchazwe.
Amasu Okucubungula Idatha Ye-Poststack Seismic
Kunezindlela eziningana zokucubungula idatha ye-poststack seismic ezivame ukusetshenziswa, okungukuthi:
1. Ukufuduka
Ukufuduka kuyindlela esetshenziswa ukuhambisa idatha yokuzamazama komhlaba kusuka kusizinda sesikhathi kuya kusizinda sokujula, noma ukuphinda kugxilwe izibonisi ezisusiwe ngenxa yesimo sendawo esiyinkimbinkimbi noma ukushintshashintsha kwejubane endaweni engaphansi komhlaba. Ukufuduka kungenziwa kusetshenziswa izindlela ezifana nokufuduka kwesikhathi noma ukufuduka kokujula.
– Ukufuduka Kwesikhathi: Kusetshenziswa lapho ijubane eliphakathi nendawo lingaguquguquki kahle futhi isakhiwo sangaphansi komhlaba silula.
– Ukufuduka Kokujula: Kusetshenziselwa izakhiwo eziyinkimbinkimbi kakhulu ezingaphansi komhlaba kanye nesivinini esiphakathi esihlukahlukene.
2. Ukuhlunga
Ukuhlunga kusetshenziselwa ukunciphisa umsindo nokucacisa izimpawu zokuzamazama komhlaba. Amanye amasu okuhlunga afaka:
– Ukuhlunga i-Bandpass: Kuhlunga amaza angaphandle kwebanga lemvamisa oyifunayo.
– Ukuhlunga kwe-FK: Kunciphisa umsindo ezizindeni zemvamisa kanye nezinombolo zamagagasi.
– Ukuhlunga Okuphakathi: Indlela engeyona eqondile yokunciphisa umsindo we-spike.
3. Ukulungiswa Kobukhulu
Ukulungiswa kwe-amplitude kuhlose ukukhokhela ukusabalala kwamandla okuzamazama komhlaba kanye nokuncipha okwenzeka ngaphakathi kwendawo. Lawa masu afaka:
– Ukubuyisa Inzuzo: Ukusebenzisa izindlela ezifana ne-AGC (Automatic Gain Control) ukubuyisela ubukhulu besiginali esibuthakathaka.
– Ukuvuselelwa Kwe-Amplitude Yangempela: Kusebenzisa izindlela ezibonakalayo ukulinganisa nokulungisa ukuncishiswa kwesignali.
4. Ukuqeda ukuguquka
Ukususa i-deconvolution kusetshenziselwa ukuthuthukisa ukuxazululwa kwesikhashana kwedatha yokuzamazama komhlaba nokunciphisa imiphumela yokusabalala kwamagagasi. Le ndlela ihilela ukususa imiphumela yokuhlunga ebangelwa yidivayisi yokurekhoda kanye nendawo yemidiya.
5. Ukuhumusha Okuzenzakalelayo Nokusebenzisana
Ukusetshenziswa kwesofthiwe esekelwe ku-AI kanye nezindlela zokuxhumana zokuhumusha izici ze-geological kusuka kudatha yokuzamazama komhlaba ecutshunguliwe. Lokhu kufaka phakathi ukunqunywa komkhathi, ukuhlonza amaphutha, kanye nokuchazwa kwesitsha.
6. Ukulinganisa Okubonakalayo
Ukulinganisela kwe-Spectral kusetshenziselwa ukuthuthukisa impendulo yemvamisa yesethi yedatha nokwandisa ukuxazululwa kwesignali yokuzamazama komhlaba ngokunxephezela ukuncishiswa okusheshayo kwemvamisa ephezulu uma kuqhathaniswa nemvamisa ephansi.
7. Ukuhlaziywa Kokuhambisana kanye Nezimfanelo
Ukuhlaziywa kokuhambisana kanye nezimfanelo kuyizindlela ezithuthukisiwe ezisetshenziswa ukuthuthukisa ukuchazwa kwedatha yokuzamazama komhlaba. Ukuhambisana kusetshenziswa ukuthola izici eziqondile ezifana namaphutha, kuyilapho izimfanelo zokuzamazama komhlaba ezifana ne-amplitude, isigaba, kanye nemvamisa zisetshenziswa ukuhlonza izakhiwo ze-lithological kanye ne-stratigraphic.
8. Ukuguqulwa Kwe-Poststack
Ukuguqulwa kwe-Poststack kuchaza inqubo yokuguqula idatha yokubonakaliswa kwe-seismic ibe yimodeli ye-acoustic impedance. Le modeli inikeza ulwazi oluningiliziwe mayelana nezakhiwo zezinto ezingaphansi komhlaba futhi ivame ukusetshenziswa kanye nedatha yelogi yomthombo ukuze kuchazwe ngokunembe kakhudlwana.
Ukuthuthukiswa Kobuchwepheshe Namathuluzi Ekucutshungulweni Kwedatha Ye-Poststack Seismic
Ngokuthuthuka kobuchwepheshe, amathuluzi kanye nesofthiwe esetshenziselwa ukucubungula idatha ye-poststack seismic nayo iye yathuthukiswa kakhulu. Ezinye zesofthiwe ezidumile embonini namuhla zifaka:
– I-Seismic Unix (SU): Isofthiwe yomthombo ovulekile yokucubungula idatha ye-seismic.
– I-ProMAX: Isetshenziswa kabanzi embonini ngezigaba ezahlukene zokucubungula ukuzamazama komhlaba okuhlanganisa ukuqoqa inqwaba kanye nokucubungula inqwaba.
– I-Petrel: Isofthiwe evela ku-Schlumberger enikeza ipulatifomu ehlanganisiwe yokucubungula nokuhumusha idatha ye-seismic.
– I-Kingdom Suite: Isofthiwe evela ku-IHS Markit esetshenziselwa ukuhlaziywa kwe-geological kanye ne-geophysical.
Ngokwethula i-cloud computing, ukuhlaziywa kwedatha enkulu, kanye nobuchwepheshe bokufunda komshini, ukucubungula idatha ye-poststack seismic kungenziwa kahle kakhulu futhi kunikeze imiphumela enemininingwane eminingi futhi esheshayo.
Isiphetho
Ukucutshungulwa kwedatha ye-Poststack seismic kuyisinyathelo esibalulekile ekuhlaziyweni kwedatha ye-seismic, okuhloswe ngaso ukuthuthukisa ukuchazwa kwezakhiwo ezingaphansi komhlaba. Kusetshenziswa amasu ahlukahlukene njengokufuduka, ukuhlunga, ukulungiswa kwe-amplitude, ukususa i-convolution, nokunye, ikhwalithi yedatha ye-seismic ehlanganisiwe ingathuthukiswa kakhulu. Intuthuko kwezobuchwepheshe besofthiwe kanye nokusetshenziswa kwezindlela zesimanje ezifana nokufunda komshini kuyaqhubeka nokucindezela imingcele yokunemba nokusebenza kahle ekucutshungulweni kwedatha ye-seismic.
Ngokuqonda kahle lawa masu kanye nokusetshenziswa kwamathuluzi afanele, ososayensi nonjiniyela bangenza izinqumo ezinolwazi nolwazi oluthe xaxa ekuhloleni izinsiza zemvelo kanye nokunciphisa izingozi ze-geological.
