IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0063150
(2013-10-25)
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| 등록번호 |
US-9383470
(2016-07-05)
|
|
발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
Patent Portfolio Builders PLLC
|
| 인용정보 |
피인용 횟수 :
2 인용 특허 :
38 |
초록
▼
Streamer and method for deploying the streamer for seismic data acquisition related to a subsurface of a body of water. The method includes a step of releasing into the body of water, from a vessel, a body having a predetermined length together with plural detectors provided along the body; a step o
Streamer and method for deploying the streamer for seismic data acquisition related to a subsurface of a body of water. The method includes a step of releasing into the body of water, from a vessel, a body having a predetermined length together with plural detectors provided along the body; a step of towing the body and the plural detectors such that the plural detectors are submerged; and a step of configuring plural birds provided along the body, to float at a predetermined depth from a surface of the water such that a first portion of the body has a curved profile while being towed underwater.
대표청구항
▼
1. A streamer for collecting seismic data related to a subsurface of a body of water, the streamer comprising: a body having first and second portions;plural detectors provided along the body; andplural birds distributed along the first portion of the body,wherein the plural birds are configured to
1. A streamer for collecting seismic data related to a subsurface of a body of water, the streamer comprising: a body having first and second portions;plural detectors provided along the body; andplural birds distributed along the first portion of the body,wherein the plural birds are configured to position the body, when deployed under water, at predetermined depths from a surface of the water to impart to the first portion of the body a predetermined, variable-depth profile while being towed underwater. 2. The streamer of claim 1, wherein the variable-depth profile is one of a parabola, a circle or a hyperbola. 3. The streamer of claim 1, wherein the plural birds are also distributed along the second portion to achieve a flat profile of the second portion. 4. The streamer of claim 1, wherein the non-linear, variable-depth profile is parameterized and described by z(h), which is a depth of a point of the first portion relative to the surface of the water, and satisfies the following equation: z(h)=z0+s0h(1-0.5(hhc))forh≤hc,where h is a horizontal distance between the point and a first detector provided on the body, z0 is a depth of the first detector relative to the surface of the water, s0 is a non-zero slope of the body at the first detector of the streamer, and hc is a predetermined horizontal distance between the first detector and an end of the non-linear, variable-depth profile. 5. The streamer of claim 4, wherein the second portion is described by equation z(h)=z0+s0·0.5·hc for h>hc. 6. The streamer of claim 4, wherein a projection of the entire body on a line substantially parallel to the surface of the water is less than hc. 7. The streamer of claim 1, wherein the non-linear, variable-depth profile stays substantially the same during the towing. 8. The streamer of claim 1, wherein the plural detectors include hydrophones and accelerometers. 9. A method for seismic data acquisition related to a subsurface of a body of water, the method comprising: towing a body having plural detectors distributed along the body;configuring plural birds along a first portion of the body, to position the body at predetermined depths from a surface of the water to impart to the first portion of the body a predetermined, variable-depth profile while being towed underwater; andrecording with the plural detectors the seismic data while towing the body. 10. The method of claim 9, wherein the profile is a parabola, a circle or a hyperbola. 11. The method of claim 9, wherein a second portion of the streamer has a flat profile and is connected to the first portion. 12. The method of claim 9, wherein the non-linear, parameterized, variable-depth profile is described by z(h), which is a depth of a point of the first portion relative to the surface of the water, and satisfies the following equation: z(h)=z0+s0h(1-0.5(hhc))forh≤hc,where h is a horizontal distance between the point and a first detector provided on the body, z0 is a depth of the first detector relative to the surface of the water, s0 is a non-zero slope of the body at the first detector of the streamer, and hc is a predetermined horizontal distance between the first detector and an end of the non-linear, variable-depth profile. 13. The method of claim 12, further comprising: towing a second portion, connected to the first portion, the second portion being described by equation z(h)=z0+s0·0.5·hc for h>hc. 14. The method of claim 9, wherein the plural detectors include hydrophones and accelerometers. 15. A method for processing seismic data acquired with a variable-depth profile streamer, the method comprising: towing a body having plural seismic detectors;configuring plural birds along a first portion of the body, to position the body at predetermined depths from a surface of the water, to impart to the first portion of the body a predetermined, variable-depth profile while being towed underwater;recording with the plural seismic detectors seismic data generated by a seismic source while towing the body; andprocessing the seismic data to generate an image of a surveyed subsurface. 16. The method of claim 15, wherein the variable-depth profile is one of a parabola, a circle or a hyperbola. 17. The method of claim 15, wherein the plural birds are also distributed along a second portion of the body to achieve a flat profile for the second portion. 18. The method of claim 15, wherein the non-linear, variable-depth profile is parameterized and described by z(h), which is a depth of a point of the first portion relative to the surface of the water, and satisfies the following equation: z(h)=z0+s0h(1-0.5(hhc))forh≤hc,where h is a horizontal distance between the point and a first detector provided on the body, z0 is a depth of the first detector relative to the surface of the water, s0 is a non-zero slope of the body at the first detector of the streamer, and hc is a predetermined horizontal distance between the first detector and an end of the non-linear, variable-depth profile. 19. The method of claim 18, wherein a second portion attached to the first portion is described by equation z(h)=z0+s0·0.5·hc for h>hc. 20. The method of claim 15, wherein the plural detectors include hydrophones and accelerometers.
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