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Shale gas - ntxiv chaw ntawm lub zog thiab tej teeb meem
Shale gas yog ib yam ntawm cov nkev, nws yog tsim los feem ntau ntawm methane thiab feeb meej nyob rau hauv shales.
Shale pob zeb hu ua folding ntawm ob peb khaubncaws sab nraud povtseg thaum uas tig mus rau lub uas tsis muaj-kub minerals (chlorite, sericite, actinolite, muscovite li al.).
Cov pob zeb yam ntxwv muaj peev xwm mus tau yooj yim phua rau hauv daim hlau txoj kev qhov chaw (lolus) ntawm uas accumulates shale gas.
Cov lolus yog tsis nplua nuj roj reserves, tab sis, cuaj kaum, lawv yeej txaus siab los npaj coj mus muag ntau lawm.
Shale deposits nyob rau txhua sab av loj, uas lub teb chaws muaj peev xwm ua tej yam uas tsis yog-volatile, kev muab cov kev pab tsim nyog.
Extraction ntawm no gas nqi yog siab vim lub fact tias muas thaum chiv thawj nws tau txuam nrog lub qhib ntawm chaw loj loj, siv hydraulic fracturing technology (hydraulic reservoir) thiab qhov drilling ntawm ntev qhov nyob rau hauv loj tus xov tooj, tsim nyob rau hauv lawv ib tug keej rau roj siv.
nkev ntau lawm
Tus thawj coj mus muag ntau lawm ntawm cov pa roj los ntawm shale deposits nyob rau hauv lub tebchaws United States tau nqa tawm.
Tom qab ntawd zoo technology, sib txuas ntsug thiab kab rov tav drilling, uas txo tus nqi ntawm cov roj.
Niaj hnub no shale gas yog ua los ntawm nqa tawm lub drilling ntsug los yog kab rov tav qhov dej siv multiotvodov nyob rau tib lub tob thiab multistage dej (kab rov tav) nyob rau hauv lub qhov hluav taws xob mus rau peb kis lus mev.
Technology qhia shale gas txhaj dej drilled nyob rau hauv ib tug sib tov ntawm dej, xuab zeb thiab cov tshuaj. Dej rauj tshwm sim, uas lov cov roj reservoir phab ntsa, uas tso cai rau tso mus rau qhov chaw ntawm tag nrho cov muaj roj.
Kab rov tav drilling tshuab siv ib lub txheej txheem 3DGEO seismic modeling, uas combines geological kev tshawb fawb hab kuas nrog computer ua ntaub ntawv, nrog rau visualization.
Kab rov tav zoo drilling yuav tsum tau nqa tawm nrog nruj kev xav txog tag nrho cov kev cai, piv txwv li, qhov tseeb drilling lub yuav tsum phim lub kaum sab xis ntawm inclination ntawm lub shale tsim.
Shale gas khoom
Tus nqi ntawm cov roj ntau lawm yog txiav txim los ntawm xws li ntsuas:
- cov ntsiab lus ntawm lub zog sands ntawm av nplaum, uas yog tau nqus lub zog ntawm cov pob txha lov ua, uas tsub kom tus nqi ntawm cov tshuaj siv thiab tej yam nyob rau hauv them nqi;
- leej faj dioxide (sab xam tus nqi ntawm cov leej faj dioxide pa roj tsub kom tus nqi nyob rau hauv qhov kev siv);
- kerogen cov ntsiab lus;
- nqi nyob rau hauv tuab shales thiab thermally muaj zog teej tug mus rau Paleozoic thiab Mesozoic lub sij hawm;
- hais txog ntawm tus txheem ntawm silica (dua nws yog, qhov ntau nkig shale thiab txo tau tus nqi).
zoo ntawm ntau lawm
- txoj kev loj hlob ntawm shale deposits siv fracturing tej zaum yuav nqa tawm nyob rau hauv densely populated cheeb tsam;
- sib thooj shale gas teb mus xaus neeg siv;
- ntau lawm sau tsis tau kev tso cai ntawm tsev cog khoom roj cua.
shortcomings
- nrog hydraulic fracturing technology yuav tsum tau loj nyiaj ntawm cov dej nyob ze teb, lub kua yog kab mob thiab nyuaj yuav tsum tau muab pov tseg;
- shale dej yog tsawg check nyob rau hauv kev siv dua pa;
- drilled qhov dej txo lub tus nqi ndlwg sai heev - los ntawm 30-40% tauj ib xyoo;
- mus extract shale gas, siv txog 85 lom kab mob, txawm hais tias lub caij nyoog tooj yog pub leej twg paub;
- lub extraction ntawm methane gas yog ho poob, uas tsub kom lub tsev cog khoom nyhuv ;
- profitability ntawm ntau lawm yog tsim xwb nyob rau hauv lub xub ntiag ntawm siab roj gas thiab thov;
- ancient shale deposits muaj theem ntawm gamma tawg, uas tsub kom lub keeb kwm yav dhau tawg raws li ib tug tshwm sim ntawm cov pob txha lov ua.
Environmental thiab shale gas
Yog hais tias shale gas yog ib tug uas twb muaj lawm technology yuav tsis tau ib tug zaum lwm txoj rau tej yam ntuj tso.
Txawm li cas los, nrog ceev faj tswj ntawm cov ib puag ncig roj extraction los ntawm roj shale yog tau nyob rau hauv sparsely populated cheeb tsam.
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