DK200000720A - Fremgangsmåde til kompensation for geometriske variationer ved densitetsmålinger med dataopsamling under boring - Google Patents
Fremgangsmåde til kompensation for geometriske variationer ved densitetsmålinger med dataopsamling under boring Download PDFInfo
- Publication number
- DK200000720A DK200000720A DK200000720A DKPA200000720A DK200000720A DK 200000720 A DK200000720 A DK 200000720A DK 200000720 A DK200000720 A DK 200000720A DK PA200000720 A DKPA200000720 A DK PA200000720A DK 200000720 A DK200000720 A DK 200000720A
- Authority
- DK
- Denmark
- Prior art keywords
- segment
- compensating
- data collection
- density
- during drilling
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 18
- 238000005553 drilling Methods 0.000 title description 3
- 238000013480 data collection Methods 0.000 title 1
- 238000001739 density measurement Methods 0.000 title 1
- 230000015572 biosynthetic process Effects 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000001427 coherent effect Effects 0.000 description 2
- 238000004181 pedogenesis Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/08—Measuring diameters or related dimensions at the borehole
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
- G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
- G01V5/12—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma or X-ray sources
- G01V5/125—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma or X-ray sources and detecting the secondary gamma- or X-rays in different places along the bore hole
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- High Energy & Nuclear Physics (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
Patentkrav: 1. Fremgangsmåde til bestemmelse af densiteten af en jordformation, som gennembrydes af et borehul, under boring af borehullet, kendetegnet ved at fremgangsmåden omfatter: (a) rotation og fremføring af et værktøj i borehullet på en borestreng, hvor værktøjet omfatter en kilde for kernestråling og en langafstandsdetektor samt en kortafstandsdetektor, der er anbragt aksialt i forskellige afstande fra kilden, (b) frembringelse af en reaktion fra langafstandsdetektoren og en reaktion fra kortafstandsdetektoren i et antal azimutborehulssegmenter, hvor hver reaktion indikerer kernestråling fra kilden, der samvirker med jordformationen, (c) bestemmelse for hvert segment af en segmentformati-onsdensitet ved at kombinere reaktionerne fra langafstandsdetektoren og reaktionerne fra kortafstandsdetektoren i det segment, (d) korrektion af hver segmentformationsdensitet for værktøjets standoff, hvorved der dannes et antal korrigerede værdier for segmentformationsdensiteten, (e) dannelse af et 2-dimensionalt billede ud fra formationsdensiteten ud fra antallet af korrigerede værdier for segmentformationsdensiteten, hvor billedet omgiver den fulde periferi af borehullet, og (f) azimutmæssig midling af de korrigerede segmentdensi-teter med i det væsentlige konstant værdi bestemt ud fra billedet til dannelse af en første 1-dimensional log af formationsdensiteten med hensyn til en azimutreference-vektor. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den omfatter de yderligere trin: (a) korrektion af hver segmentformationsdensitet for tidskorreleret standoff, og (b) korrektion af hver bestemt formationsdensitet for hvert segment for dybdekorreleret standoff. 3. Fremgangsmåde ifølge krav 2, kendetegnet ved, at den tidskorrelerede standoff foretages under anvendelse af en ryg-og-ribben korrektionsmetode. 4. Fremgangsmåde ifølge krav 2, kendetegnet ved, at den dybdekorrelerede standoff-korrektion foretages ved dybdeforskydning af langafstandsdetektorens reaktion og kortafstandsdetektorpunktet til et referencemåle-punkt på værktøjet. 5. Fremgangsmåde ifølge krav 1, kendetegnet ved, at azimutreferencevektoren bringes på linie med en lav side i borehullet. 6. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den indbefatter det yderligere trin at danne to eller flere 1-dimensionale logs og at referere hver nævnte log til en forskellig azimutreferencevektor. 7. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den indbefatter det yderligere trin at udføre alle beregningerne, der er nødvendige for at opnå nævnte formationsdensitetslog, under anvendelse af computermidler i værktøjet. 8. Fremgangsmåde ifølge krav 7, kendetegnet ved, at den indbefatter det yderligere trin at teletrans-mittere nævnte formationsdensitetslog til jordens overflade , 9. Fremgangsmåde ifølge krav 7, kendetegnet ved, at den indbefatter det yderligere trin at lagre nævnte informationsdensitetslog i et lagerorgan i værktøjet og efterfølgende at genfinde nævnte log, når værktøjet returneres til jordens overflade. 10. Fremgangsmåde ifølge krav 1, kendetegnet ved, at hvert segment er lige stort vinkelmæssigt. 11. Fremgangsmåde ifølge krav 1, kendetegnet ved, at alle segmenterne er sammenhængende og omgiver hele periferien af borehullet. 12. Fremgangsmåde ifølge krav 1, kendetegnet ved, at kilden omfatter et isotopisk gammastråleudsendende materiale. 13. Fremgangsmåde ifølge krav 1, kendetegnet ved, at lang- og kortafstandsdetektorerne hver omfatter et scintillationskrystal, der er optisk koblet til et fo-tomultiplikatorrør. 14. Fremgangsmåde ifølge krav 1, kendetegnet ved, at i det mindste den første 1-dimensionale log af formationsdensiteten omfatter de azimutmidlede områder med konstant korrigeret densitet plottet som funktion af målt dybde af værktøjet i borehullet. 15. System til bestemmelse af densiteten af en jordformation, der gennembrydes af et borehul, under boring af borehullet, kendetegnet ved, at det omfatter: (a) et værktøj, der er monteret i en krave i en borestreng, og som omfatter en kilde for kernestråling og en langafstandsdetektor samt en kortafstandsdetektor, der er aksialt anbragt i forskellige afstande fra kilden, og roteres og fremføres i borehullet af borestrengen, (b) langafstandsdetektcren og kortafstandsdetektoren giver en reaktion i et antal azimutborehulssegmenter, hvor hver reaktion indikerer kernestråling fra kilden, der samvirker med jordformationen defineret af segmentet, (c) en computer, der er forbundet med lang- og kortafstandsdetektorerne, til for hvert segment at bestemme formationsdensiteten ved at kombinere langafstandsdetektorens reaktioner og kortafstandsdetektorens reaktioner i det segment, hvor hver bestemt formationsdensitet for hvert segment korrigeres for værktøjets standoff, hvorved der dannes et antal korrigerede densitetsværdier for hvert segment, og (d) computeren danner et 2-dimensionalt billede af korrigeret formationsdensitet ud fra antallet af korrigerede densitetsværdier og azimutmidlede områder med konstant korrigeret densitet bestemt ud fra billedet til dannelse af i det mindste en 1-dimensional log af formationsdensiteten med hensyn til en azimutreferencevektor. 16. System ifølge krav 15, kendetegnet ved, at computeren korrigerer for værktøjets standoff og omfatter : (a) organer til at korrigere hver bestemt formationsdensitet for tidskorreleret standoff, og (b) organer til at korrigere hver bestemt formationsdensitet for hvert segment for dybdekorreleret standoff. 11. System ifølge krav 16, kendetegnet ved, at computeren er forbundet med en hukommelse til lagring af instruktioner fra en såkaldt spine-and-rib-proces. 18. System ifølge krav 16, kendetegnet ved, at korrektionen for dybdekorreleret standoff foretages ved dybdeforskydning af langafstandsdetektorens reaktion og kortafstandsdetektorpunktet til et referencemålepunkt pa værktøjet. 19. System ifølge krav 15, kendetegnet ved, at azimutreferencevektoren ligger på linie med en lav side i borehullet. 20. System ifølge krav 15, kendetegnet ved, at der er dannet to eller flere 1-dimensionale logs, og hver log refererer til en forskellig azimutreferencevek-tor. 21. System ifølge krav 15, kendetegnet ved, at hvert segment er lige stor vinkelmæssigt. 22. System ifølge krav 15, kendetegnet ved, at alle segmenterne er sammenhængende og omgiver hele periferien af borehullet.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/310,893 US6307199B1 (en) | 1999-05-12 | 1999-05-12 | Compensation of errors in logging-while-drilling density measurements |
Publications (1)
Publication Number | Publication Date |
---|---|
DK200000720A true DK200000720A (da) | 2000-11-13 |
Family
ID=23204543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK200000720A DK200000720A (da) | 1999-05-12 | 2000-05-02 | Fremgangsmåde til kompensation for geometriske variationer ved densitetsmålinger med dataopsamling under boring |
Country Status (9)
Country | Link |
---|---|
US (1) | US6307199B1 (da) |
AU (1) | AU741634B2 (da) |
BR (1) | BR0002413A (da) |
CA (1) | CA2307444C (da) |
DK (1) | DK200000720A (da) |
GB (1) | GB2349947B (da) |
IT (1) | IT1317761B1 (da) |
NL (1) | NL1015081C2 (da) |
NO (1) | NO20002150L (da) |
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-
1999
- 1999-05-12 US US09/310,893 patent/US6307199B1/en not_active Expired - Lifetime
-
2000
- 2000-04-11 AU AU27682/00A patent/AU741634B2/en not_active Ceased
- 2000-04-14 GB GB0009241A patent/GB2349947B/en not_active Expired - Fee Related
- 2000-04-27 NO NO20002150A patent/NO20002150L/no not_active Application Discontinuation
- 2000-05-02 DK DK200000720A patent/DK200000720A/da not_active Application Discontinuation
- 2000-05-02 CA CA002307444A patent/CA2307444C/en not_active Expired - Fee Related
- 2000-05-02 NL NL1015081A patent/NL1015081C2/nl active Search and Examination
- 2000-05-11 IT IT2000MI001049A patent/IT1317761B1/it active
- 2000-05-11 BR BR0002413-9A patent/BR0002413A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2349947A (en) | 2000-11-15 |
US6307199B1 (en) | 2001-10-23 |
NO20002150D0 (no) | 2000-04-27 |
CA2307444C (en) | 2003-07-15 |
NL1015081A1 (nl) | 2000-11-14 |
ITMI20001049A0 (it) | 2000-05-11 |
AU741634B2 (en) | 2001-12-06 |
GB0009241D0 (en) | 2000-05-31 |
IT1317761B1 (it) | 2003-07-15 |
ITMI20001049A1 (it) | 2001-11-11 |
NO20002150L (no) | 2000-11-13 |
NL1015081C2 (nl) | 2007-10-05 |
AU2768200A (en) | 2000-11-16 |
BR0002413A (pt) | 2001-01-02 |
CA2307444A1 (en) | 2000-11-12 |
GB2349947B (en) | 2001-11-14 |
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