30 Qhov Tseem Ceeb Tseem Ceeb Txog Zoo Log Txhais

Nyob rau hauv lub ntiaj teb complex ntawm kev tshawb fawb roj thiab roj, drilling muab lub cev "caj npab" ncav mus rau hauv lub ntiaj teb, tab sis kev txiav kom zoo yog qhov tseem ceeb "qhov muag," nthuav tawm cov lus zais zais hauv pob zeb. Cov nkhaus thiab cov ntaub ntawv muab los ntawm kev txiav ntoo tuav tus yuam sij rau kev nkag siab lithology, porosity, permeability, thiab hydrocarbon cov ntsiab lus. Txawm li cas los xij, kev hloov pauv cov kev ntsuas raw rau hauv kev paub txog geological yuav tsum muaj kev paub txog kev txhais cov cav- kev qhuab qhia sib xyaw geology, physics, thiab cov ntaub ntawv tshawb fawb.

Daim ntawv qhia dav dav tsis ntev los no los ntawm kev lag luam qhov chaw "Precision Oilfield Development" tau kho 30 qhov tseeb ntawm kev txhais cov cav. Npog txhua yam los ntawm cov ntsiab lus yooj yim mus rau cov txheej txheem siab heev, cov khoom sau no ua rau muaj txiaj ntsig zoo rau cov qub tub rog thiab lub hauv paus ruaj khov rau cov neeg tuaj tshiab. Ntawm no, peb distilled no 30 hardcore insights.

1. Dab tsi yog Kev Sau Npe Zoo?
Nws yog kev xyaum ua kom ntxaws cov ntaub ntawv (ib lub cav) ntawm cov geological formations nkag los ntawm ib tug borehole. Cov cuab yeej tshwj xeeb yog siv los ntsuas lub cev lub cev ntawm cov pob zeb thiab lawv cov kua dej.

2. Lub Hom Phiaj Tseem Ceeb ntawm Kev Txiav Txim?
Yooj yim muab, peb yam:Nrhiav hydrocarbons( txheeb xyuas cov pob zeb reservoir),Ntsuas cov hydrocarbons(Kev ntsuam xyuas cov dej zoo thiab cov hydrocarbon saturation), thiabUa cov hydrocarbons(qhia kev txhim kho thiab cov tswv yim tsim khoom).

3. Qhib Qhov vs. Cased Qhov Logging

• Qhib Qhov Logging:Ua tom qab drilling tab sis ua ntej khiav casing. Qhov no captures qhov tsim nyob rau hauv nws feem ntau natural state thiab yog lub sij hawm tseem ceeb rau kev ntsuam xyuas.
• Cased Hole Logging:Ua tom qab casing yog teem. Nws lub hom phiaj suav nrog kev ntsuam xyuas cov haujlwm cement, saib xyuas cov kev hloov pauv ntau lub sijhawm, thiab ntsuas cov roj saturation ntxiv.

4. Kev sib raug zoo: Kev txiav ntoo, av nkos, thiab Coring
Peb cov no yog cov kwv tij ua ke:

• Mud Logging:Muab cov sijhawm tiag tiag -, cov ntaub ntawv zoo los ntawm cov pob zeb txiav thiab cov pa tawm ntawm qhov chaw. Nws yog pem hauv ntej - kab qhia.
• Zoo Loggging:Muab kev txuas ntxiv,kom muaj nuj nqislub cev parameter nkhaus piv rau qhov tob.
• Coring:Rov qab tau cov qauv pob zeb tiag tiag. Nws muab cov pov thawj ncaj qha thiab tseeb tshaj plaws tab sis kim thiab tsis txuas ntxiv. Cov ntaub ntawv tseem ceeb yog siv los "calibrate" log txhais lus.

5. Dab tsi yog "Conventional Nine Lines"?
Qhov no yog hais txog qhov yooj yim tshaj plaws thiab feem ntau siv suite ntawm logging curves uas tsim lub hauv paus ntawm kev txhais lus. Nws feem ntau suav nrog: Gamma Ray (GR), Spontaneous Potential (SP), Caliper (CAL), Sonic Transit Time (AC / DT), Bulk Density (RHOB), Neutron Porosity (NPHI / CNL), thiab peb txoj kab nkhaus resistivity (dav, ntiav, thiab micro- tsom).

6. Gamma Ray (GR) - Qhov taw qhia Shale
GR ntsuas lub ntuj radioactivity ntawm kev tsim. Shales feem ntau yog cov xov tooj cua feem ntau, thaum cov pob zeb reservoir zoo li sandstones thiab carbonates tsawg dua. Nws yog cov cuab yeej tseem ceeb rau kev paub qhov txawv ntawm shale los ntawm cov pob zeb muaj peev xwm reservoir.

7. Kev Muaj Peev Xwm Muaj Peev Xwm (SP) - Daim Npav Permeability ID
SP teb rau electrochemical muaj peev xwm ntawm cov dej tsim thiab drilling av nkos filtrate. Nyob rau hauv cov cheeb tsam permeable, SP nkhaus qhia tau hais tias ib tug txawv deflection los ntawm shale baseline, ua rau nws ib tug ncaj qha qhia ntawm permeability.

8. Caliper (CAL) - Lub Boehole Sketch
CAL ntsuas lub cheeb ntawm lub borehole. Cov cheeb tsam permeable tuaj yeem pom ib txoj kab me me (vim av nkos buildup), thaum shales los yog friable formations feem ntau ntxuav tawm, qhia ib txoj kab uas hla loj. Nws yog ib qho tseem ceeb rau kev txheeb xyuas lithology thiab ua qhov kev kho ib puag ncig ntawm lwm cov cav.

9. Resistivity - Hydrocarbon "Qhov tseeb daim iav"
Qhov no yog qhovqhov nkhaus tseem ceeb tshaj plawstxhawm rau txheeb xyuas cov roj thiab roj. Hydrocarbons yog hluav taws xob insulators, thaum tsim dej (feem ntau saline) ua hluav taws xob. Yog li ntawd,siab resistivity nyob rau hauv ib tug ntxeem tau cheeb tsam qhia tau hais tias muaj cov hydrocarbons.

10. Sib sib zog nqus vs. Nthuav Resistivity - Lub Permeability "Touchstone"
Sib piv cov kev ntsuas kev tiv thaiv ntawm qhov sib txawv ntawm qhov tob ntawm kev tshawb nrhiav qhia qhov "nkag mus rau qhov profile." Yog hais tias drilling av nkos filtrate tau invaded tsim, cov nkhaus yuav sib cais. Qib ntawm kev sib cais feem ntau cuam tshuam nrog permeability.

11. Density (RHOB) - The Porosity "Scale"
Cov cuab yeej no ntsuas qhov ntom ntom ntawm qhov tsim. Los ntawm kev sib piv qhov ntsuas qhov ntom no rau qhov paub qhov ntom ntom ntawm cov pob zeb matrix, porosity tuaj yeem xam. Nws tseem yog qhov tseem ceeb rau kev txheeb xyuas ntau hom pob zeb (xws li sandstone vs. dolomite).

12. Neutron Porosity (NPHI) - Hydrogen Detector
Neutron cav feem ntau yog rhiab heev rau hydrogen atoms. Raws li cov kua dej (roj, dej) nyob rau hauv qhov pore qhov chaw muaj ntau hydrogen, lub cav no feem ntau qhia txog cov kua - puv porosity ntawm qhov tsim.

13. Lub Neutron-Density "Crossover" - Gas Kos Npe
Nyob rau hauv cov pob zeb huv si reservoir, yog hais tias lub neutron porosity nyeem qis dua qhov ntom - tau txais porosity, nws yog ib qho kev qhia classic ntawmgas. Gas has a very low density (making density porosity high) and low hydrogen content (making neutron porosity low), causing the curves to separate or "cross over."

14. Sonic Transit Time (AC/DT) - Pob Zeb Ultrasound
Qhov no ntsuas lub sij hawm rau lub suab yoj mus los ntawm ib chav nyob deb ntawm pob zeb. Nws yog siv los xam cov porosity, txheeb xyuas lithology, ntsuas cov cement zoo, thiab kuaj cov pob txha tawg (qee zaum qhia los ntawm "lub voj voog hla").

15. Photoelectric Factor (PE) - Lub Lithology ntiv tes
Kev ntsuas PE yog qhov tsis tshua muaj siab rau cov ntxhia hauv pob zeb, ua rau nws zoo heev rau kev sib txawv ntawm lithologies xws li sandstone, limestone, thiab dolomite hauv complex formations.

16. Qhov "Peb-kauj ruam" ceev-Saib txoj kev:
Lub luag haujlwm tseem ceeb rau kev txheeb xyuas qhov zoo:

1. Txheeb xyuas Lithology:Siv GR/SP cais shales los ntawm tej thaj chaw reservoir.

2. Ntsuas qhov porosity:Siv cov neutron, ntom ntom, thiab sonic nkhaus los ntsuas qhov dej zoo (kev txhim kho porosity).

3. Kev Txiav Txim Siab Cov ntsiab lus:Siv cov kab hluav taws xob tiv thaiv los txiav txim siab seb thaj chaw zoo li cas muaj cov hydrocarbons lossis dej.

17. Crossplots rau Lithology
Los ntawm kev npaj ob qho kev ntsuas kev ntsuas rau ib leeg (piv txwv li, neutron vs. density), cov ntaub ntawv cov ntsiab lus los ntawm cov lithologies sib txawv hauv cov cheeb tsam sib txawv, tso cai rau kev txheeb xyuas tau zoo txawm tias nyob hauv cov mineralogies nyuaj.

18. Porosity yog "Synthetic Art"
Tsis muaj ib qho cuab yeej porosity zoo meej. Qhov tseeb porosity feem ntau yog muab los ntawm kev sib txuas cov ntaub ntawv los ntawm neutron, ntom, thiab sonic cav nyob rau hauv ib tug qauv petrophysical uas suav rau cov lithology tshwj xeeb.

19. Lub hauv paus ntawm Saturation: Archie's Equation
Cov mis empirical no yog lub hauv paus rau kev xam cov dej saturation hauv cov qauv huv. Kev siv kom raug yuav tsum muaj peb lub ntsiab lus tseem ceeb: porosity, tsim dej tiv taus (Rw), thiab qhov tseeb tsim tawm resistivity (Rt).

20. Rw yog qhov hloov pauv tseem ceeb
Tsim cov dej resistivity yog qhov nquag nquag thiab nyuaj rau kev txiav txim siab hauv kev suav cov saturation. Nws tuaj yeem kwv yees los ntawm SP log, los ntawm cov qauv dej tsim, lossis los ntawm cov qauv hauv cheeb tsam. Ib qho yuam kev hauv Rw ua rau muaj qhov yuam kev loj hauv kev suav cov hydrocarbon ntim.

21. Teem "Cutoffs" txhais tau tias Them
Tsis yog txhua qhov ntxeem tau, hydrocarbon-cov kabmob pob zeb tuaj yeem tsim kev lag luam. Cov neeg txhais lus yuav tsum tsim kom muaj qhov tsawg kawg nkaus (kev txiav tawm) rau qhov tsis xws li porosity, permeability, thiab hydrocarbon saturation los txhais "nyiaj them" - lub caij nyoog uas yuav pab tau rau kev tsim khoom.

22. Ib txwm tso siab rau qhov "Nrhiav ceev"
Ua ntej cia siab rau kev ua haujlwm hauv computer nyuaj, ib qho yuav tsum pom qhov muag pom cov ntaub ntawv raw cov ntaub ntawv. Ntau qhov pom tseeb hydrocarbon zones, geological ciam teb, thiab cov ntaub ntawv teeb meem zoo yog tam sim ntawd pom tseeb rau qhov kev cob qhia qhov muag ntawm ib daim ntawv sau npe.

23. Cov xwm txheej ntawm lub borehole yog qhov yuam kev loj
Qhov tsis zoo ntawm qhov loj, hom av nkos thiab cov khoom, qhov kub thiab txias, thiab qhov siab tag nrho cuam tshuam rau kev nyeem ntawv. Kev txhais lus tseeb yuav tsum pib nrog kev kho ib puag ncig.

24. Mud Filtrate Invasion Tsim "False Appearances"
Kev ntxeem tau ntawm cov av nkos filtrate rau hauv thaj chaw permeable hloov cov kua dej nyob ze ntawm lub qhov dej, cuam tshuam rau qhov ntiav - nyeem cov cuab yeej. Thaum qhov "invasion profile" lees paub qhov permeability, nws yuav tsum raug suav tias yog qhov tseeb tsim cov kua dej saturation.

25. Vertical Resolution Limits – Qhov Kev Sib Tw "Thin Bed"
Txhua lub cuab yeej muaj qhov kev daws teeb meem ntsug ntsug. Yog tias lub txaj nyias dua li cov cuab yeej daws teeb meem, qhov kev nyeem ntawv yuav "nruab nrab" nrog cov pob zeb nyob ib puag ncig, uas yuav ua rau nyias nyias, cov txheej txheem ua haujlwm tsis zoo.

26. Cov cuab yeej Calibration yog lub neej zoo
"Rau khib nyiab hauv, khib nyiab tawm." Ua ntej- thiab tshaj tawm- kev txheeb xyuas txoj haujlwm, thiab ua kom cov seem rov ua dua zoo kawg nkaus, yog cov kauj ruam tseem ceeb tshaj plaws hauv kev lav cov ntaub ntawv siv tau.

27. Normalization yog tus kav rau ntau-Txoj Kev Kawm Zoo
Kev sib txawv ntawm cov txheej txheem tuaj yeem tshwm sim ntawm cov cav khiav los ntawm cov vintages sib txawv ntawm cov cuab yeej lossis cov tuam txhab kev pabcuam sib txawv. Ua ntej ntau-kev sib raug zoo los yog kev ua qauv ntawm lub pas dej, cov cav yuav tsum tau ua kom zoo li qub kom tshem tawm cov kev hloov pauv tsis yog -geological.

28. Daim Ntawv Teev Npe - Muab lub borehole "CT Scan"
Cov thev naus laus zis zoo li hluav taws xob lossis acoustic imaging tsim cov ncauj lus kom ntxaws, duab -zoo li sawv cev ntawm phab ntsa borehole. Qhov no tso cai rau kev pom ncaj qha ntawm pob txha, vugs, thiab sedimentary nta, revolutionizing qhov kev ntsuam xyuas ntawm complex reservoirs.

29. Nuclear Sib Nqus Resonance (NMR) – Cov kua dej ID
NMR logging ntsuas cov lus teb ntawm hydrogen nuclei nyob rau hauv lub pore kua, feem ntau ywj siab ntawm pob zeb matrix. Nws tuaj yeem paub qhov txawv ntawm cov dej khi thiab cov dej txav tau yooj yim, muab tag nrho cov porosity zoo thiab muaj zog permeability kwv yees - tshwj xeeb tshaj yog muaj zog nyob rau hauv qis -tsis kam them lossis cov txheej txheem pore complex.

30. Production Logging – The Well's "Stethoscope"
Qhov no suav nrog cov cav khiav hauv lub qhov dej los txiav txim siab seb lub sijhawm twg yog cov roj, roj, lossis dej. Nws muab cov duab dynamic ntawm kev ua tau zoo, txheeb xyuas cov ntsiab lus ntawm cov dej nkag, saib xyuas kev ua haujlwm cheb, thiab qhia kev ua haujlwm rau kev ua haujlwm kom zoo.

Lub teb ntawm kev txhais cov cav yog qhov loj, thiab cov 30 qhov tseeb no tsuas yog lub ntsiab lus tseem ceeb xwb. Qhov siab tshaj plaws ntawm kev txawj ntse yog nyob rau hauv seamless kev koom ua ke ntawm lubkev txawj txhais lus, covlub zog ntawm kev txheeb xyuas kev suav, thiab kev nkag siab tob txog qhovhauv zos geology. Kev paub txog cov hauv paus no yog thawj kauj ruam tseem ceeb tshaj plaws ntawm txoj hauv kev kom pom lub pas dej kom meej meej los ntawm lub qhov muag ntawm cov cav.

Yog xav paub ntxiv, thov tsis txhob yig tiv tauj pab pawg Vigor kom paub meej ntxiv txog cov khoom lag luam.