Method for generating P-S and S-S- seismic data and attributes from P-P seismic data

• US 6,871,146 B1
• Filed: 12/18/2003
• Issued: 03/22/2005
• Est. Priority Date: 09/14/2001
• Status: Expired due to Fees

• Current Assignee: Emerald Geoscience Research Corporation
• Original Assignee: Emerald Geoscience Research Corporation
• Inventors: Kelly, Michael C., Skidmore, Charles M.
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Gutierrez, Anthony
• Application Number:
  US10/742,105
• Time in Patent Office: 460 Days
• Field of Search: 702/14, 702/18
• US Class Current: 702/14
• CPC Class Codes: G01V 1/32 Transforming one recording into another or one representation into another

Abstract

A method for generating P-S or S-S seismic data from P-P AVO data in P-P travel time for a geographic area includes obtaining a plurality of amplitude and angle of incidence pairs of P-P AVO data. The plurality of amplitude and angle of incidence pairs of P-P AVO data are inverted. Lastly, estimates of the rock property contrasts are produced from the inverted plurality of amplitude and angle of incidence pairs of P-P AVO data, the rock property contrasts including at least one of ΔVp/Vp, ΔVs/Vs and Δρ/ρ.

Claims

1. A method for generating at least one of P-S or S-S seismic data from P-P AVO data in P-P travel time for a geographic area, comprising:

obtaining a plurality of amplitude and angle of incidence pairs of P-P AVO data;

inverting the plurality of amplitude and angle of incidence pairs of P-P AVO data; and

producing estimates of rock property contrasts from the inverted plurality of amplitude and angle of incidence pairs of P-P AVO data, the rock property contrasts including at least one of Δ

Vp/Vp, Δ

Vs/Vs and Δ

ρ

/ρ

.

2. The method of claim 1, wherein at least one of said P-S or S-S seismic data includes a respective P-S attribute or S-S seismic attribute.

3. The method of claim 1, wherein generating at least one of P-S or S-S seismic data further includes generating the data in at least one of P-P travel time, depth, P-S travel time, and S-S travel time.

4. The method of claim 1, wherein inverting the plurality of amplitude and angle of incidence pairs of P-P AVO data includes using at least one of a linear P-P AVO equation or a non-linear P-P AVO equation.

5. The method of claim 1, further comprising:

responsive to the estimates of the rock property contrasts, deriving a rock property response, the rock property response including at least one of a P-S and S-S full stack, angle stacks, rock property contrasts combinations Δ

Zs/Zs, Δ

(Vp/Vs)/(Vp/Vs), Δ

σ

/σ and

any other combinations of rock properties derivable from the rock property contrasts Δ

Vs/Vs and Δ

ρ

/ρ

.

6. The method of claim 5, further comprising:

modifying a vertical scale of the derived rock property contrasts from T_PP to at least one of depth Z, travel time T_PS, and travel time T_SS, wherein modifying includes utilizing at least one of data derived P wave velocities, data derived S wave velocities, and estimates of S wave velocities from P wave velocities.

7. A method for generating at least one of P-S or S-S seismic data from P-P AVO data in P-P travel time for a geographic area, comprising:

obtaining a plurality of amplitude and angle of incidence pairs of P-P AVO data;

inverting the plurality of amplitude and angle of incidence pairs of P-P AVO data using at least one of a linear P-P AVO equation and a non-linear P-P AVO equation,

producing estimates of the rock property contrasts from the inverted plurality of amplitude and angle of incidence pairs of P-P AVO data, the rock property contrasts including at least one of Δ

Vp/Vp, Δ

Vs/Vs and Δ

ρ

/ρ

, wherein generating at least one of P-S or S-S seismic data further includes generating the data in at least one of P-P travel time, depth, P-S travel time, and S-S travel time, and

responsive to the estimates of the rock property contrasts, deriving a rock property response, the rock property response including at least one of a P-S and S-S full stack, angle stacks, rock property contrasts combinations Δ

Zs/Zs, Δ

(Vp/Vs)/(Vp/Vs), Δ

σ

/σ and

any other combinations of rock properties derivable from the rock property contrasts Δ

Vs/Vs and Δ

ρ

/ρ

.

8. The method of claim 7, further comprising:

modifying a vertical scale of the derived rock property contrasts from T_PP to at least one of depth Z, travel time T_PS, and travel time T_SS, wherein modifying includes utilizing at least one of data derived P wave velocities, data derived S wave velocities, and estimates of S wave velocities from P wave velocities.