Qhov zoo tshaj plaws ntawm azimuthal tsom gamma detector yog tias nws hloov kho cov tsoos 1D GR qhov tob nkag mus rau hauv 2D ncig lub qhov borehole radioactive imaging. Qhov kev hloov pauv loj no hloov geosteering los ntawm qhov muag tsis pom kev drilling mus rau qhov pom kev trajectory steering. Kev paub txog kev ua haujlwm puv ntoob los ntawm cov khoom nyoos suav rau kev txiav txim siab geosteering- ua rau cov tswv lag luam thiab cov koom ua ke los ntsuas qhov ua tau zoo ntawm ZTFT-Ib hom LWD cov cuab yeej.
Sector Division & Tiag -Time Azimuthal Imaging
Nyob rau hauv cov pa ua haujlwm downhole, lub qhov rais nrhiav pom ntawm lub tsom gamma sensor txais lub azimuth qhib ntawm 90℃los yog nqaim. Nruab nrog lub ntsej muag lub ntsej muag lub ntsej muag, lub cuab yeej faib 360℃borehole ncig mus rau 4, 8 lossis 16 sectors thaum sib hloov, thiab khaws gamma ray suav ntawm nws tus kheej rau txhua qhov haujlwm.
Raws li lub laum txoj hlua tig, qhov kev yuav khoom tau faib txhua qhov gamma mem tes mus rau qhov chaw khaws cia los ntawm lub ntsej muag lub ntsej muag. Tom qab kev txheeb xyuas smoothing nyob rau hauv vib nas this mus rau kaum vib nas this, ib tug ua tiav borehole radioactive unfolding daim ntawv qhia yog tsim, hu ua azimuthal gamma imaging. Nws muab intuitive circumferential tsim hluav taws xob faib rau tiag tiag - lub sij hawm geosteering.
Physical Mechanism of Formation Boundary Identification
Ciam teb ceeb toom ntxov cia siab rau qhov pom tseeb ntawm cov xov tooj cua sib txawv ntawm lub pas dej thiab cov pob zeb nyob ib puag ncig. Hauv cov xuab zeb zoo ib yam -shale sequences, reservoir sandstone qhia GR qhov tseem ceeb ntawm 30–60 API, thaum overlying shale mus txog 120–180 API.
Thaum lub sij hawm kab rov tav drilling nyob rau hauv sandstone, thaum lub me ntsis mus txog lub Upper shale ciam teb, gamma siv los ntawm sab sauv sectors nce sharply vim shale nkag mus rau ntawm hluav taws xob txoj kev. Nyob rau hauv daim duab qhia chaw, cov khoom sib thooj qhia cov gamma ntau dua nrog cov xim ci dua. Lub asymmetric sector teb ncaj qha qhia qhov txheeb ze thiab kev taw qhia ntawm tus ciam teb me ntsis thiab tsim.
Saib -Kev Tshawb Nrhiav Ua Ntej & Kev Ua Haujlwm Zoo Zoo
Nruab nyob ze -ntsis txoj hauj lwm nrog rau pem hauv ntej- qaij nrhiav qhov rais, lub azimuthal tsom gamma detector paub zoo saib - tshawb nrhiav ua ntej. Nws txheeb xyuas qhov txawv txav ntawm kev tsim hluav taws xob ua ntej ntawm me ntsis ua ntej hla kev tsim ib thaj tsam.
Ua ke nrog tiag tiag -lub sij hawm LWD geological qauv hloov kho, geosteering engineers tuaj yeem kho qhov tsim thiab tso cov kaum sab xis ua ntej, ua kom lub qhov dej zoo nyob ruaj khov nyob rau hauv nruab nrab ntawm lub reservoir txheej. Qhov kev twv ua ntej no- hloov kho- pov thawj kaw- lub voj voog tswj boosts reservoir nkag mus rau ntau tshaj 90%, zoo heev rau cov lus teb lagging ntawm cov pa GR logging.
Data Compression & Mud Pulse MWD Transmission
Azimuthal gamma imaging tsim ntau cov ntaub ntawv loj dua li ib txwm ib txwm -channel GR cov cav, thaum cov av nkos pulse MWD systems tsuas yog txhawb nqa ultra- tsis tshua muaj kev sib kis bandwidth ntawm ob peb cov khoom ib ob.
Txhawm rau hloov mus rau qhov txwv downhole bandwidth, downhole processor txais cov kev daws teeb meem zoo: kev sib koom ua ke los ntawm 8 mus rau 4 quadrants, xa tsuas yog qhov siab tshaj plaws - tus nqi sector kev taw qhia thiab suav tus nqi sib txawv, thiab uploading compressed imaging slices.
ZITN tsom gamma detectors tso tawm tus qauv tsis zoo pulse signals ncaj qha. Tag nrho cov ntaub ntawv ua thiab compression yog ua tiav los ntawm kev tsim - hauv kev tau txais & kev ua haujlwm. Cov qauv modular ua rau cov neeg sib koom ua ke kom yoog raws qhov sib txawv thiab teeb tsa sib txawv MWD / LWD kis tau tus mob rau ntau yam kev ua haujlwm downhole.