Downhole pressure gauges yog cov cuab yeej tseem ceeb rau kev tshawb nrhiav roj thiab roj thiab kev txhim kho (drilling, txiav, ua tiav) nrog rau kev saib xyuas cov roj thiab roj ntau lawm. Lawv lub luag haujlwm tseem ceeb yog txhawm rau txhawm rau khaws cov ntsiab lus tseem ceeb xws li hauv qab qhov siab, tsim siab, thiab casing annulus siab rau lub sijhawm ntev nyob rau hauv qhov chaw qis qis uas muaj qhov kub thiab txias, siab siab, muaj zog corrosion, thiab khaus vibration. Cov ntaub ntawv no muab lub hauv paus tseem ceeb rau kev ntsuam xyuas lub pas dej, kev ua kom zoo tshaj plaws, thiab kev ceeb toom ntxov txog kev nyab xeeb. Raws li "sensing core" ntawm downhole siab gauges, quartz siv lead ua siab sensors nyob hauv qhov chaw nruab nrab tsis tuaj yeem vim lawv cov yam ntxwv tshwj xeeb.
Vim li cas Quartzsiv lead ua?
Qhov tshwj xeeb kev ua tau zoo ntawm quartz siv lead ua sensors yog cov hauv paus hauv lawv lub cev: tsis zoo li cov sensors uas ncaj qha tsim hluav taws xob los ntawm cov nyhuv piezoelectric, cov tub ntxhais ntawm quartz siv lead ua sensor siv lub zog piezoelectric thiab siab Q-factor (zoo factor) ntawm quartz los tsim ib qho me me "tuning diav rawg" resonator (feem ntau yog ib qho SC-txiav siv lead ua). Qhov no resonator yog hermetically kaw nyob rau hauv lub tshuab nqus tsev chamber uas muaj ib tug inert roj (xws li, helium). Thaum lub siab sab nraud ua rau lub siab precision diaphragm, lub diaphragm deforms los hloov lub siab nyob rau hauv lub chamber, thiab lub hydrostatic siab ncaj qha mus rau lub quartz resonator. Siab induces micro-deformation ntawm quartz lattice, yog li linearly hloov nws lub ntuj resonant zaus. Zaus yog qhov muaj nuj nqis digital uas tuaj yeem ntsuas nrog ultra- siab precision (los ntawm kev suav moos pulses), hauv paus tshem tawm suab nrov, drift, thiab nonlinear distortion inherently qhia thaum lub sij hawm amplification thiab kis ntawm analog signals (voltage, tam sim no).
Lub quartz siv lead ua siab sensor yog cov tseem ceeb ntawm cov niaj hnub siab -precision downhole siab ntsuas, thiab nws daim ntawv thov tau hloov pauv qib thiab tus nqi ntawm downhole siab xyuas. Nws lub luag haujlwm tseem ceeb yog feem ntau cuam tshuam hauv cov hauv qab no:
1. Tsis sib xws High Precision thiab siab daws teeb meem
Exceptional precision: Mus txog ± 0.01% ntawm tag nrho cov nplai (FS) lossis siab dua, ua tau zoo tshaj qhov kev ntsuas kev ntsuas ib txwm muaj lossis lub peev xwm sensors (feem ntau ± 0.025% - 0.1% FS).
Ultra- daws teeb meem zoo: Muaj peev xwm txheeb xyuas cov feeb hloov pauv me me li 0.0001 psi (kwv yees li 0.7 Pascals). Qhov no yog qhov tseem ceeb rau kev txheeb xyuas cov teeb meem tsis muaj zog heev hauv qhov dej zoo, xws li cov lus teb ntawm ciam teb thaum ntxov thiab tawg pib siab.
2. Ntev ntev -Lub Sij Hawm Stability thiab Ultra- Tsawg Drift
Lub sij hawm tsawg kawg nkaus - nyob ntawm qhov kev ua tau zoo sib txawv: Qhov kev sib tw txhua xyoo ntawm quartz siv lead ua sensors tuaj yeem qis li ob peb psi, thaum cov khoom siv ib txwm muaj peev xwm nthuav tawm txog kaum tawm psi hauv ib xyoos.
Kev txiav txim siab tseem ceeb rau kev saib xyuas lub sijhawm ntev (piv txwv li, lub hlis lossis xyoo ntawm kev saib xyuas cov dej hauv lub pas dej): Ua kom muaj kev sib piv ntawm cov ntaub ntawv keeb kwm, xav txog qhov hloov pauv ntawm lub pas dej es tsis yog kev cuam tshuam los ntawm lub sensor nws tus kheej.
3. Kev ua haujlwm kub zoo heev
Cov khoom siv quartz nws tus kheej nthuav tawm cov khoom ruaj khov, thiab cov qauv tsim sensor feem ntau suav nrog siab - qhov kub thiab txias them nyiaj (siv cais quartz kub siv lead ua).
Muaj peev xwm tswj tau qhov tseeb nyob rau hauv siab - kub downhole ib puag ncig (feem ntau 175℃, nrog siab - kub qauv mus txog 200℃), ib qho kev ua tau zoo uas ntau lwm cov sensors tawm tsam kom phim.
4. Digital Frequency Signal Output with Strong Anti-Interference Capability
Quartz sensors tso zis zaus signals proportional rau siab. Cov teeb liab zaus muaj zog heev tiv thaiv electromagnetic cuam tshuam (EMI) thiab suab nrov thaum kis tau tus mob piv rau analog voltage lossis tam sim no cov cim.
Qhov no ua kom ntseeg tau tias cov ntaub ntawv ntsuas tseem muaj kev ncaj ncees txawm tias tom qab ntev -kab kis tau tus mob (los ntawm ob peb kilometers downhole mus rau saum npoo).
5. Ua kom muaj cov qauv ntsuas siab thiab ntsuas kev ntsuas siab
Ua tsaug rau nws cov lus teb ceev ceev cov yam ntxwv, quartz siab gauges txhawb siab -ntau zaus ua piv txwv ntawm ntau zaus hauv ib ob lossis txawm kaum tawm zaus hauv ib ob.
Qhov no tso cai rau cov ntaub ntawv raug cai ntawm cov txheej txheem dynamic xws li kev ntsuas tsis ruaj khov, ntsuas pulse siab, hydraulic fracturing ua haujlwm siab, thiab siab hloov pauv hauv kev txiav txim siab ntau lawm, muab cov ntaub ntawv tseem ceeb rau kev txheeb xyuas ze ntawm -wellbore zone tus yam ntxwv, tawg propagation cwj pwm, thiab lwm yam tseem ceeb tsis.
Cov ntsiab lus
Quartz siv lead ua siab sensors tsis yog tsuas yog "lub siab" ntawm downhole siab gauges tab sis kuj tseem ceeb tshaj plaws thiab tseem ceeb "cov ntaub ntawv pob zeb" nyob rau hauv cov txheej txheem ntawm niaj hnub reservoir digitalization thiab kev txawj ntse. Lawv nyob ze - txwv qhov tseeb, kev ruaj ntseg, thiab kev ntseeg siab tau nce qhov ntsuas qhov siab los ntawm lub cuab yeej "saib xyuas" mus rau kev tshawb fawb "diagnostic". Lawv ua kom cov kws ua haujlwm saib xyuas "visualize" hloov maj mam reservoir dynamics uas ib txwm sensors tsis tuaj yeem nthuav tawm, ua haujlwm tseem ceeb hauv lub hauv paus tseem ceeb rau kev tswj xyuas reservoir niaj hnub, txhim kho cov roj rov qab (EOR), thiab kev ua tiav ntawm oilfield digitalization thiab kev txawj ntse. Yog tsis muaj lawv, ntau txoj hauv kev zoo tshaj plaws, kev soj ntsuam cov thev naus laus zis, thiab cov ntaub ntawv -kev txiav txim siab ua kom zoo dua yuav tsis ua tau.