Ojiji nke Usoro Ala Ọma Jijiji na Nnyocha Gas Hydrate
Pendahuluan
Mmiri gas, nke a na-akpọkarị "aịs methane," bụ ngwakọta kristal nke mejupụtara molekul mmiri nke na-ejide molekul gas methane n'ime ha. A na-ahụ mmiri gas n'okpuru ala oké osimiri n'ime omimi ụfọdụ ebe nrụgide dị elu na obere okpomọkụ na-ekwe ka ha dịrị. Dịka ụfọdụ atụmatụ si kwuo, ọnụọgụ methane nke a kpọchiri n'ime mmiri gas nwere ike ịdị ukwuu karịa ihe nchekwa gas nkịtị niile a maara ugbu a.
Dịka isi iyi ike n'ọdịnihu, nchọpụta gas hydrate aghọwo isiokwu nyocha na-adọta uche site na ụlọ ọrụ dị iche iche. Agbanyeghị, nchọpụta gas hydrate na-eweta nnukwu ihe ịma aka teknụzụ, ọkachasị n'ịchọpụta na ịse ebe ọ dị. Nke a bụ ebe usoro ala ọma jijiji na-arụ ọrụ dị oke mkpa.
Ụkpụrụ Ndị Dị Mkpa nke Usoro Ala Ọma Jijiji
Usoro ala ọma jijiji bụ usoro nchọpụta geophysical nke na-eji ebili mmiri na-agbanwe agbanwe eme nnyocha banyere nhazi ala ụwa. Usoro a nwere ike imepụta onyonyo atọ nke ala dị n'okpuru ala, nke na-enyere aka ịchọpụta ọnụnọ nke hydrocarbons, gụnyere gas hydrates. N'ozuzu, enwere ike kewaa usoro ala ọma jijiji n'ime ala ọma jijiji na ala ọma jijiji.
Ntụgharị Uche nke Ala Ọma Jijiji
Usoro ntụgharị uche nke ala ọma jijiji bụ usoro a na-ejikarị eme ihe n'inyocha hydrocarbon. Isi ihe dị na usoro a gụnyere izipu ebili mmiri ala ọma jijiji n'ime ụwa, nke na-alaghachi azụ mgbe ha ruru n'elu mmiri nwere ihe dị iche iche. Ndị nchọpụta na-anakọta data ntụgharị uche a ma hazie ya iji mepụta onyonyo nke ala ụwa.
Ntughari nke ala ọma jijiji
N'adịghị ka ụzọ ntụgharị uche, ntụgharị uche nke seismic na-eji ebili mmiri seismic nke a na-agbanwe agbanwe mgbe ha gafere ókè dị n'etiti oyi akwa abụọ nwere ọsọ ebili mmiri dị iche iche. A na-ejikarị usoro a enyocha oyi akwa ndị dị omimi ma na-eme atụmatụ paramita anụ ahụ dịka ọsọ nke ebili mmiri seismic site na ihe ahụ.
Teknụzụ Ala Ọmarịcha Maka Nnyocha Gas Hydrate
Ojiji nke usoro ala ọma jijiji n'inyocha gas hydrate amụbaala nke ukwuu, yana ụzọ teknụzụ dị iche iche na mgbanwe ndị e mere ka ha kwekọọ n'ihe ịma aka nke gburugburu mmiri. Ụfọdụ n'ime teknụzụ na ụzọ ndị bụ isi e ji mee ihe bụ ndị a:
2D na 3D ala ọma jijiji
– 2D Seismic: Ọmụmụ ihe gbasara ala ọma jijiji nke 2D gụnyere iji otu ma ọ bụ karịa ahịrị ala ọma jijiji wepụta ozi n'okpuru ala. A na-ejikarị ya eme nnyocha mbụ ma na-enye nkọwa zuru ezu banyere nhazi ala dị n'okpuru ala.
– 3D Seismic: Maka onyonyo zuru ezu karị, ọmụmụ ihe gbasara ala ọma jijiji 3D na-eji netwọk ihe nchọpụta dị mgbagwoju anya karị, na-emepụta onyonyo atọ nke ala dị n'okpuru ala. 3D seismic bara uru karịsịa maka nhazi ziri ezi nke nkesa gas hydrate.
Nyocha AVO (Mgbawa Ọnụọgụ na Mbelata)
Nyocha nke Amplitude versus Offset (AVO) bụ usoro nyocha nke na-amụ mgbanwe dị na mmụpụta ebili mmiri na-egosipụta n'ihe gbasara akụkụ nke ihe merenụ ma ọ bụ anya offset. Enwere ike iji AVO chọpụta ihe ndị na-adịghị mma na gas hydrate. Methane dị na gas hydrates nwere ike ibute mgbanwe dị ukwuu na njirimara acoustic nke ihe ahụ, nke na-egosipụta onwe ya na onyonyo seismic dị ka ihe ndị na-adịghị mma na AVO.
Mgbanwe nke ala ọma jijiji
Mgbanwe ala ọma jijiji bụ usoro ihe nlereanya nke na-agbanwe data ntụgharị ala ọma jijiji ka ọ bụrụ profaịlụ mgbochi acoustic, nke enwere ike ijikọ ya na njirimara anụ ahụ na nke petrophysikal nke ala oké osimiri a na-enyocha. Mgbanwe ala na-enye ohere maka foto doro anya nke ọnụnọ na ọkpụrụkpụ nke gas hydrates.
BSR (Ihe ngosi ihe na-eme ka ihe dị n'ala)
Otu ihe na-egosi na ala ọma jijiji dị na ya bụ Bottom Simulating Reflector (BSR). BSR bụ ihe na-egosi na ala ọma jijiji na-agba ọsọ n'akụkụ ala oké osimiri ma na-egosi ókèala ala nke ala mmiri gas hydrate. Mgbanwe a na-akpata site na mgbanwe mberede na ihe ndị dị n'okpuru ala, site na mpaghara nwere ọtụtụ gas hydrates ruo na mpaghara na-enweghị gas n'okpuru.
Ọmụmụ Ihe: Nnyocha Gas Hydrate n'ọtụtụ ebe
Mmiri Ndị Japan Dị n'Oké Osimiri
Japan bụ otu n'ime mba ndị na-etinye aka nke ukwuu n'inyocha na inyocha gas hydrate. Gọọmentị Japan ebidola ọtụtụ nnukwu ọrụ nyocha n'ime mmiri ya dị n'ụsọ oké osimiri. Ojiji nke usoro 3D seismic na teknụzụ AVO arụpụtala ihe ndị dị mma, na-egosi na enwere nnukwu hydrates gas.
South China Sea
Oké Osimiri South China bụkwa ebe a na-elekwasị anya na nchọpụta gas hydrate. Ọmụmụ ihe gbasara ala ọma jijiji nke 2D na 3D n'ógbè a achọpụtala ọtụtụ ihe owuwu nwere ike ịnwe gas hydrates. Ntụle BSR bụ ihe a na-ahụkarị, nke na-egosi nnukwu mpaghara nkwụsi ike gas hydrate na mpaghara ahụ.
Ihe ịma aka na atụmanya
Ihe ịma aka
– Omimi na Nrụgide: Ebe a na-ahụkarị mmiri gas dị n'ime ala dị omimi n'okpuru ala oké osimiri, ebe nrụgide na ọnọdụ okpomọkụ nwere ike ime ka nchọpụta na mwepụta sie ike.
– Mkpebi Data: Ọ bụ ezie na teknụzụ ala ọma jijiji emeela nke ọma, mkpebi data ka bụ ihe ịma aka. Maapụ ziri ezi na nke dị elu dị mkpa maka nchọpụta dị irè karị.
– Nchekwa na Gburugburu Ebe Obibi: Mgbawa gas hydrate nwere ike imebi nkwụsi ike dị n'okpuru mmiri ma chọọ nlezianya pụrụ iche iji hụ na nchekwa na nchekwa gburugburu ebe obibi.
Atụmanya
– Mmepe Injinịa Ala Ọmarịcha: Nnyocha na mmepe na-aga n'ihu na teknụzụ ala ọma jijiji ga-eme ka e nwee usoro ndị ka mma ma dị irè n'ọdịnihu.
– Mmekọrịta Mba Nile: Mmekọrịta dị n'etiti mba dị iche iche na ụlọ ọrụ nyocha ụwa ga-eme ka ọganihu dị ngwa na nchọpụta na mwepụta nke gas hydrate.
– Ike Ọdịnihu: Ebe isi mmalite ike nkịtị na-aghọ ụkọ, gas hydrates na-enye nnukwu ikike dị ka ihe ọzọ maka ike n'ọdịnihu nke nwere ike igbo mkpa ụwa niile.
Mmechi
Ojiji nke usoro ala ọma jijiji n'inyocha gas hydrate enyela aka dị ukwuu n'ịghọta ọnụnọ na nkesa nke akụrụngwa ike a n'okpuru oké osimiri. Ọ bụ ezie na ọtụtụ ihe ịma aka ka dị, mmepe teknụzụ na mmekorita mba ụwa n'ọhịa a na-enye atụmanya dị mma. Dịka isi iyi ike n'ọdịnihu, gas hydrate nwere ike ịbụ isi ihe na-eme ka ọchịchọ ike zuru ụwa ọnụ na-eto eto. Ya mere, nchọpụta na nyocha ọzọ n'akụkụ a dị oke mkpa ma dị mkpa.
