DK3036566T3 - Samtidig kildeanvendelse under både seismisk indhentning og seismisk inversion - Google Patents
Samtidig kildeanvendelse under både seismisk indhentning og seismisk inversion Download PDFInfo
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/282—Application of seismic models, synthetic seismograms
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- G—PHYSICS
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- G01V1/003—Seismic data acquisition in general, e.g. survey design
- G01V1/005—Seismic data acquisition in general, e.g. survey design with exploration systems emitting special signals, e.g. frequency swept signals, pulse sequences or slip sweep arrangements
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- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
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Claims (15)
1. Fremgangsmåde til at udlede en model for hastighed under overfladen eller anden fysisk egenskab, der omfatter: at opnå (702) seismiske data, der bliver indhentet i en undersøgelse, ved at fremføre en forreste kilde og en efterfølgende, bageste kilde langs en kildelinje med en ikke fast fordeling af modtagere, og ved at aktivere hver kilde ved udvalgte intervaller langs kildelinjen, hvorved hver aktiveringsplacering for den bageste kilde falder på en tidligere aktiveringsplacering for den forreste kilde, og hvorved der bliver benyttet en udvalgt feltindkodning for alle kildeskud med feltindkodningen for den bageste kilde altid værende den samme, som tidligere blev anvendt til den forreste kilde ved den samme aktiveringsplacering, hvilket resulterer i en række af skudoptagelser, der hver samtidig optager begge kilder, men med hvert skud optaget med mindre end en fuld fordeling af modtagere; og at behandle skudoptagelserne med trin, der omfatter: (i) at konstruere (703) en flerhed af uægte superskudoptagelser fra skudoptagelserne, som er konstrueret således, at hver har data fra en fuld fordeling af modtagere, hvorved hver uægte superskudoptagelse indbefatter en flerhed af kildeplaceringer; (ii) at indkode (705) hver uægte superskudoptagelse og at sammenhobe dem til at danne en samtidighedskildeoptagelse af målte data; (iii) at benytte en computer til at simulere (706) samtidighedskildeoptagelsen af målte data, idet der benyttes den samme indkodning som benyttet i (11) og også feltindkodningen, og at benytte en antaget model for hastighed under overfladen eller anden fysisk egenskab; og (iv) at sammenligne (707) den simulerede samtidighedskildeoptagelse med samtidighedskildeoptagelsen fra målte data og fra det at bestemme en justering af modellen for hastighed under overfladen eller anden fysisk egenskab.
2. Fremgangsmåde ifølge krav 1, hvorved de indhentede undersøgelsesdata indbefatter i det mindste én, samtidigt indhentet, parallel kildelinje, hvorved hver kildelinje har en forreste kilde og en efterfølgende, bageste kilde med sammenpassede kildeaktiveringsplaceringer for alle kildelinjer, hvorved hver aktiveringsplacering for en bageste kilde på en hvilken som helst kildelinje falder på en tidligere aktiveringsplacering for den forreste kilde på denne kildelinje, og hvorved der bliver benyttet en udvalgt feltindkodning for alle kildeskud med feltindkodningen for hver bageste kilde altid værende den samme, som tidligere blev anvendt til dens tilsvarende forreste kilde ved den samme aktiveringsplacering.
3. Fremgangsmåde ifølge krav 1, hvorved den forreste kilde og den bageste kilde er adskilte af en fast afstand d, der underdeles til et helt antal N af skudintervaller, idet sådanne skudintervaller er det nominelle eller gennemsnitlige skudinterval for undersøgelsen.
4. Fremgangsmåde ifølge krav 3, hvorved der bliver konstrueret N + 1 uægte superskudoptagelser i (i) , der hver er af fast varighed og rumlig udstrækning, idet varigheden er større end eller lig med en lyttetid, der bliver benyttet i undersøgelsen, og dertil er en minimal tid for, at vibrationer fra et kildeskud bliver formindsket til et forudbestemt niveau; og den rumlige udstrækning er større end eller lig med en maksimal modtagerforskydningsafstand, der bliver benyttet i undersøgelsen, og dertil er en minimal afstand, over hvilken kildeamplituden bliver formindsket til et forudbestemt niveau.
5. Fremgangsmåde ifølge krav 4, hvorved (i) - (iii) bliver gentaget en flerhed af gange under benyttelse af andre skudoptagelser fra andre skudplaceringer langs kildelinjen, og så bliver (iv) udført under benyttelse af resultater fra alle gentagelser af (i) - (iii) .
6. Fremgangsmåde ifølge krav 5, hvorved alle data, der er indhentet langs kildelinjen, bliver indbefattet i det mindste i én uægte superskudoptagelse.
7. Fremgangsmåde ifølge krav 1, der yderligere omfatter at tage den justerede hastighedsmodel fra (iv) og at gentage trinnene (i) - (iv) under benyttelse af forskellig computerindkodning i (ii) .
8. Fremgangsmåde ifølge krav 1, hvorved feltindkodningen omfatter én eller flere af tilfældige tidsforskydninger, tilfældige kildeplaceringer, faserotationer og forskellige bestrygningsfunktioner.
9. Fremgangsmåde ifølge krav 1, hvorved konstruktionen i (i) omfatter at benytte én eller flere af at vinduesafgrænse, at tidsforskyde, at udfylde i tid eller spor og at vedhæfte.
10. Fremgangsmåde ifølge krav 1, hvorved den seismiske undersøgelse omfatter: en maritim undersøgelse, i hvilken et fartøj, der bevæger sig, trækker én eller flere kilder og ét eller flere bånd af modtagere; eller en undersøgelse på land eller havbund, der involverer en rullende fordeling af modtagere, når undersøgelsen skrider frem langs en undersøgelseslinje.
11. Fremgangsmåde til at gennemføre en seismisk undersøgelse med en flerhed af samtidige kilder og en ikke fast fordeling af modtagere og at udlede en model for hastighed under overfladen eller anden fysisk egenskab, der omfatter: (a) at aktivere to eller flere kilder med en udvalgt feltindkodning, som bliver anvendt på hver kilde ved en placering langs en kildelinje med en første, delvis fordeling af modtagere; (b) at aktivere de to eller flere kilder eller identiske kilder, idet f eltindkodningen i (a) gentages, ved den samme placering langs kildelinjen med en anden, delvis fordeling af modtagere, hvorved den første, delvise fordeling og den anden, delvise fordeling, når de kombineres, udgør en fuldstændig fordeling af modtagere for placeringen langs kildelinjen; (c) at gentage (a) og (b) for én eller flere yderligere placeringer langs kildelinjen; og så at behandle optagelser af seismiske data, der er optaget med modtagerne fra aktiveringerne i (a) - (c), med trin, der omfatter: (d) at konstruere en flerhed af uægte superskudoptagelser fra skudoptagelserne, som er konstruerede til at være af den samme varighed og rumlige udstrækning, og sådan at hver har data fra en fuldstændig fordeling af modtagerplaceringer, hvorved hver uægte superskudoptagelse indbefatter en flerhed af kildeplaceringer; (e) at computerindkode hver uægte superskudoptagelse og at summere for at danne en enkelt samtidighedskildeoptagelse af målte data; (f) at benytte en computer og en model for hastighed under overfladen eller anden fysisk egenskab, idet der simuleres en samtidighedskildeoptagelse af syntetiske data med én fremadgående modelleringsoperation for at forudsige samtidighedskildeoptagelsen af målte data; og (g) at sammenligne samtidighedskildeoptagelsen af målte data med den simulerede samtidighedskildeoptagelse, at bestemme en afvigelse, og at benytte afvigelsen til at justere modellen for det under overfladen.
12. Fremgangsmåde ifølge krav 11, der yderligere omfatter at tage den justerede model for det under overfladen fra (g) og at gentage trinnene (e) - (g) under benyttelse af en forskellig computerindkodning i (e) .
13. Fremgangsmåde ifølge krav 11, hvorved feltindkodningen omfatter én eller flere af tilfældige tidsforskydninger, tilfældige kildeplaceringer, faserotationer og forskellige bestrygningsfunktioner.
14. Fremgangsmåde ifølge krav 11, hvorved konstruktionen i (d) omfatter at benytte én eller flere af at vinduesafgrænse, at tidsforskyde, at udfylde i tid eller spor og at vedhæfte.
15. Fremgangsmåde ifølge krav 11, hvorved den seismiske undersøgelse omfatter: en maritim undersøgelse, hvori et fartøj, der bevæger sig, trækker én eller flere kilder og ét eller flere bånd af modtagere; eller en undersøgelse på land eller havbund, der involverer en rullende fordeling af modtagere, når undersøgelsen skrider frem langs en undersøgelseslinje.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361869292P | 2013-08-23 | 2013-08-23 | |
| PCT/US2014/046361 WO2015026451A2 (en) | 2013-08-23 | 2014-07-11 | Simultaneous sourcing during both seismic acquisition and seismic inversion |
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| Publication Number | Publication Date |
|---|---|
| DK3036566T3 true DK3036566T3 (da) | 2018-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK14744730.4T DK3036566T3 (da) | 2013-08-23 | 2014-07-11 | Samtidig kildeanvendelse under både seismisk indhentning og seismisk inversion |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US9772413B2 (da) |
| EP (2) | EP3351972A1 (da) |
| AU (1) | AU2014309376B2 (da) |
| BR (1) | BR112015030104A2 (da) |
| CA (1) | CA2913496C (da) |
| DK (1) | DK3036566T3 (da) |
| ES (1) | ES2671789T3 (da) |
| MX (1) | MX359179B (da) |
| WO (1) | WO2015026451A2 (da) |
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| US10036818B2 (en) | 2013-09-06 | 2018-07-31 | Exxonmobil Upstream Research Company | Accelerating full wavefield inversion with nonstationary point-spread functions |
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- 2014-07-11 CA CA2913496A patent/CA2913496C/en not_active Expired - Fee Related
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| EP3351972A1 (en) | 2018-07-25 |
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| WO2015026451A2 (en) | 2015-02-26 |
| AU2014309376A1 (en) | 2016-03-03 |
| EP3036566A2 (en) | 2016-06-29 |
| BR112015030104A2 (pt) | 2017-07-25 |
| ES2671789T3 (es) | 2018-06-08 |
| US20150057938A1 (en) | 2015-02-26 |
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