Hloov tshiab kawg: Lub Peb Hlis 5, 2026
Kev soj ntsuam microseismic hauv thaj teb tsis tshua yooj yim. Cov teeb liab tsis muaj zog, feem ntau faus rau hauv lub suab nrov, thiab cuam tshuam los ntawm array geometry. Txhim kho qhov tseeb ntawm qhov chaw tsis yog tsuas yog xaiv qhov zoo dua algorithm. Nws nyob ntawm seb peb tsim tag nrho cov kev soj ntsuam xyuas li cas - los ntawm kev xa tawm sensor mus rau kev ua cov ntaub ntawv.
Peb tsim peb -cov ntsiab lus nodal seismographs, thiab dhau los ntawm kev koom tes ntev - nrog cov kws ua haujlwm hauv teb, peb tau pom tias cov cuab yeej tsim thiab array layout ncaj qha cuam tshuam cov txiaj ntsig kawg. Hauv qab no, peb khaws cov qauv zoo ib yam tab sis piav qhia cov ntsiab lus kev coj ua ntau dua thiab ncaj qha. Hauv tsab xov xwm no, peb qhia peb cov kev paub dhau los hauv kev txhim kho qhov tseeb ntawm kev saib xyuas microseismic.
Microseismic Monitoring yog dab tsi?
Cov xwm txheej microseismic yog me me - nplai seismic signals tsim los ntawm pob zeb tawg lossis deformation. Nyob rau hauv unconventional roj thiab roj txoj kev loj hlob, tshwj xeeb tshaj yog thaum lub sij hawm hydraulic fracturing, cov teeb liab no tso cai rau peb saib yuav ua li cas puas fractures loj hlob nyob rau hauv av thiab seb stimulation puas zoo.
Hauv thaj av shale roj xws li Weiyuan, kev soj ntsuam microseismic tau dhau los ua cov cuab yeej ntsuas tseem ceeb. Los ntawm kev nrhiav cov xwm txheej me me no hauv peb - qhov chaw seem, peb tuaj yeem kwv yees qhov siab ntawm pob txha, qhov ntev, thiab kev taw qhia, uas ncaj qha txhawb kev tsim tiav thiab kev kwv yees ntau lawm.
Muaj ntau txoj hauv kev rau kev tso npe yog siv hauv kev lag luam. P- thiab S-wave tuaj txog lub sij hawm sib txawv txoj kev ua haujlwm zoo thaum ob theem nthwv dej yog qhov tseeb, xws li hauv kev saib xyuas hauv qab. Rau cov cim tsis muaj zog saum npoo, Qhov Chaw-Scanning Algorithm (SSA) tau siv dav. Hauv ntau qhov dej num, peb muab cov kev sib txuas: peb thawj zaug siv qhov chaw tshawb xyuas kom pom cov xwm txheej sai sai, thiab tom qab ntawd kho lawv qhov chaw siv txheeb ze mus txawv tebchaws - sijhawm suav. Ob - cov txheej txheem no txhim kho kev ruaj ntseg thaum ua kom muaj txiaj ntsig zoo.
Peb -Component Nodal Seismographs tau txais cov ntaub ntawv Microseismic li cas?
Peb peb -cov ntsiab lus nodal seismographs sau cov lus tsa suab hauv peb cov lus qhia - X, Y, thiab Z - ntawm txhua qhov chaw nres tsheb. Piv nrog rau cov kab hluav taws xob ib txwm muaj, txhua qhov ntawm nws tus kheej ua haujlwm ntawm nws tus kheej, suav nrog GPS sijhawm, thiab txhawb kev xa tawm yooj yim. Qhov no tso cai rau kev teeb tsa sai dua thiab yooj yim dua scaling ntawm thaj chaw saib xyuas.
Hauv cov dej num tiag tiag, peb rov saib dua tias P-yoj lub zog muaj zog dua thiab pom tseeb dua S-wave zog. S- nthwv dej feem ntau tsis muaj zog thiab nyuaj dua los txheeb xyuas hauv qhov chaw muaj suab nrov. Tom qab sib sau ua ke, P-yoj lub zog feem ntau tsim kom muaj zog ntau dua.
Vim li no, nyob rau hauv ntau qhov teeb meem, peb cia siab rau P-yoj lub zog stacking rau qhov tshwm sim thiab qhov chaw. Thaum P–S kev sib koom ua ke yog qhov kev xav zoo nkauj, tsis muaj zog S-yoj lub zog tuaj yeem txo qhov kev ruaj ntseg tag nrho hauv cov arrays. Kev muaj tiag hauv teb chaws feem ntau coj peb los ua qhov tseem ceeb tshaj plaws uas ntseeg siab tshaj plaws.
Kev txo suab nrov yog qhov tseem ceeb sib npaug. Cov ntaub ntawv nyoos saum npoo tuaj yeem ua rau lub suab nrov ntawm ib puag ncig, ua rau lub zog tsom tsis meej. Tom qab kev denoising kom zoo, waveform alignment txhim kho, stacking zog nce, thiab qhov chaw imaging yuav ntau concentrated. Peb kuj pom tau tias P-yoj lub zog yog qhov tshwj xeeb tshaj yog nyob rau ntawm ntsug (Z) feem, uas feem ntau dhau los ua cov lus siv ruaj khov tshaj plaws thaum ua haujlwm.
Microseismic qhov chaw imaging map
Loj npaum li cas yuav tsum saib xyuas thaj chaw kom raug Microseismic Positioning?
Ua ntej xa cov nodes, peb tsim ib qho yooj yim geological thiab tshaj tawm qauv. Forward modeling pab peb to taub yuav ua li cas seismic nthwv dej taug kev los ntawm cov txheej txheej txheej thiab seb lub kaum sab xis qhov tseem ceeb yuav txo tau cov teeb liab siv tau.
Peb feem ntau tswj qhov xwm txheej ntawm lub kaum sab xis ntawm qhov tsim nyog kom tsis txhob muaj P-wave attenuation ntau dhau. Hauv kev xyaum, peb feem ntau tsim lub vojvoog saib xyuas kom sib npaug ntawm lub hom phiaj qhov tob. Yog tias qhov array me dhau lawm, qhov kev ua yuam kev ntsug nce. Yog tias nws loj dhau lawm, cov nqi nce ntxiv yam tsis muaj kev txhim kho hauv qhov raug.
Array geometry yeej ib txwm sib npaug ntawm physics thiab economics.
Dab tsi Array Layout ua haujlwm zoo dua hauv Surface Microseismic Monitoring?
Surface microseismic systems yog feem ntau teem rau hauv thaj, kab sib chaws, lossis radial layouts. Txhua txoj hauv kev muaj qhov sib txawv nyob ntawm qhov project lub hom phiaj thiab qhov chaw nyob.
Patch layouts tsom rau thaj chaw tshwj xeeb tab sis feem ntau ua rau tsis sib xws azimuth kev pab them nqi. Grid layouts muab kev faib tawm ntau dua, tab sis lawv feem ntau xav tau cov cuab yeej siv ntau dua thiab siv sijhawm ntev dua. Thaum tus naj npawb ntawm cov nodes zoo ib yam, peb feem ntau pom tias radial layouts muab azimuth kev pab cuam dav dua thiab txhim kho ntsug sampling efficiency.
Nyob rau hauv ntsug los yog deviated zoo fracturing tej yaam num, tso nodes radially nyob ib ncig ntawm lub qhov dej yuav pom tau tias txhim kho ntsug positioning raug. Hauv ntau qhov kev ntsuam xyuas, cov tshuab radial tau ua tiav qhov tseeb ntawm kwv yees li ± 9.5 meters raws li cov khoom siv sib piv.
Qhov kev txhim kho no feem ntau yog los ntawm geometry. Ib qho radial array kuaj seismic nthwv dej los ntawm ntau cov lus qhia ntau tus sib npaug, uas ua rau lub zog tsom mus rau thiab txo qis qhov tsis paub tseeb. Nrog rau cov kev taw qhia zoo dua, cov xwm txheej qhov chaw ua kom ruaj khov thiab zoo ib yam.
Microseismic teeb liab sib sau ua ke tso saib
Field Case: Radial Monitoring hauv Shale Gas
Hauv qhov project shale gas hauv Weiyuan, lub hom phiaj reservoir yog Longmaxi shale tsim ntawm qhov tob ntawm 1819.5 m thiab 1867.5 m. Txoj kab rov tav ntsuas 48 m thiab tau muab faib ua ob theem tawg.
Muab qhov tsis muaj zog microseismic signals xav tau nyob rau hauv shale, peb tau tsom mus rau qhov nce ntawm qhov ntom ntom ncaj qha saum cov kab rov tav. Kev saib xyuas tau teem caij radially nyob ib ncig ntawm lub qhov dej, nrog kaum kab npog 360℃thiab rau qhov chaw nres tsheb ib kab, sib nrug 300 m sib nrug. Qhov kev teeb tsa no tau tsim los ua kom muaj kev tiv thaiv kev tiv thaiv ntau tshaj plaws thiab txhim kho cov qauv ntsug.
Txhawm rau ntsuas qhov kev ua tau zoo ntawm lub cev, peb tau ua qhov kev ntsuas kev tswj xyuas kev puas tsuaj uas siv cov khoom sib txuas ntawm 20, 30, 40, 50, thiab 60 tau txais channel. Cov txiaj ntsig tau pom qhov sib txawv: raws li tus naj npawb ntawm cov channel muaj txiaj ntsig tau nce, qhov xwm txheej qhov chaw ruaj ntseg tau txhim kho. Thaum siv ntau tshaj 50 channels, qhov chaw ua yuam kev tau los ua qhov ruaj khov, qhia tau hais tias qhov kev faib ua feem ntawm cov khoom siv tau zoo yog qhov tseem ceeb rau qhov tseeb microseismic positioning.
Cov ntaub ntawv no qhia txog lub hauv paus ntsiab lus tseem ceeb hauv kev saib xyuas microseismic: array geometry thiab qhov ntom ntom yog qhov tseem ceeb raws li kev xaiv algorithm. Kev npaj ua tib zoo saib xyuas kom ntseeg tau tias muaj kev ntseeg tau thiab muaj tseeb hauv cheeb tsam ntawm cov teeb liab tsis muaj zog, txawm tias muaj kev sib tw shale formations. Cov qauv tsim radial, ua ke nrog cov kev pab them nqi txaus, tso cai rau peb khaws cov duab ua tiav ntau dua ntawm kev nthuav tawm tawg hauv peb qhov ntev.
Kev soj ntsuam qhov nrug cuam tshuam li cas Microseismic raug
Peb paub tias qhov kev soj ntsuam ntau muaj qhov cuam tshuam loj rau qhov chaw microseismic. Nthuav cov array nyob rau hauv cov kev txwv tsim nyog yuav pab txo qis geometric yuam kev nyob rau hauv ntsug thiab ua rau kab rov tav mus ncig teb chaws - lub sij hawm tsis meej nyob rau hauv kev tswj.
Qee cov ntsiab lus tseem ceeb peb ua raws hauv daim teb:
- Feem ntau cov chaw nres tsheb feem ntau yog ze rau qhov tob dua li qhov kev sib hloov ntawm kab rov tav, uas pab tswj kev mus ncig - lub sijhawm cuam tshuam.
- Kev nce array lub vojvoog tuaj yeem ua rau me ntsis nce kab rov tav geometry yuam kev, tab sis nws feem ntau txo qis qhov yuam kev ntsug- qhov tseem ceeb ntawm qhov tsis paub meej.
- Kev mus dav heev tuaj yeem nce nqi yam tsis tau txhim kho qhov tseeb.
Peb Cov Cai Tsim Qauv rau Peb -Component Nodal Systems
Ntau xyoo ntawm kev ua haujlwm hauv teb thiab kev tsim khoom, peb tau tsim ntau cov lus qhia rau kev tsim array:
- Array Geometry Matters: Thaum cov khoom siv kom muaj nuj nqis yog tsau, radial layouts feem ntau muab qhov chaw ruaj khov dua li daim phiaj layouts.
- Tsom ntsoov rau thaj chaw Qhov Chaw: Yog tias peb paub txog qhov twg cov xwm txheej yuav tshwm sim, peb nce qhov ntom ntom saum thaj chaw ntawd.
- Optimize Line Numbers thiab Kev Pab: Kev nthuav cov kab thiab kev pab cuam nyob rau hauv qhov tsim nyog qhov sib txawv ua rau kev ua tau zoo yam tsis muaj nqi nce ntxiv.
- Teem Lub Radius Raws Li Qhov Chaw Qhov tob: Ib lub vojvoog me me dhau los ua rau muaj qhov yuam kev ntsug, thaum loj heev txo qhov ua tau zoo.
- Channel suav thiab Zoo: Ua kom muaj feem ntau ntawm cov channel tau txais txiaj ntsig yog qhov tseem ceeb rau qhov chaw nyob ruaj khov.
Cov hauv paus ntsiab lus no yog ua raws li kev rov ua dua qhov tseeb, tsis yog kev xav. Txhua qhov project muaj nws cov kev cov nyom, yog li peb kho cov qauv tsim raws li geology, qhov tob, thiab lub hom phiaj cov cim.
Peb tau kawm tias microseismic positioning raug txiav txim los ntawm ntau tshaj li algorithms xwb. Nws nyob ntawm:
- Sensor zoo thiab lub sijhawm ruaj ntseg
- Array geometry thiab node ceev
- Muaj txiaj ntsig channel suav thiab teeb liab zoo
- Kev tswj suab nrov thiab kev npaj xa tawm
Nrog peb -cov txheej txheem nodal, ua tib zoo tsim array, thiab cov tswv yim ua cov tswv yim, peb tuaj yeem txhim kho qhov tsis muaj zog- kev tshawb pom qhov xwm txheej thiab ua tiav peb qhov chaw nyob ruaj khov -.
Txhawm rau hloov cov txiaj ntsig no rau hauv kev ua haujlwm tiag tiag, peb tau cog lus los txhim kho qhov sib xws ntawm lub sensor, lub sijhawm raug, thiab kev xa mus ua haujlwm tau zoo. Qhov no tso cai rau cov pab pawg ua haujlwm tsom mus rau kev txhais cov ntaub ntawv txhim khu kev qha, tsis yog raug txwv los ntawm kev txwv cov khoom siv.
Cov ntaub ntawv
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