Land streamer surveying using multiple sources

Patent metadata

Field	Value
Publication number	US-9772412-B2
Application number	US-201414298108-A
Country	US
Kind code	B2
Filing date	Jun 6, 2014
Priority date	Jun 6, 2013
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

Various examples are provided for land streamer seismic surveying using multiple sources. In one example, among others, a method includes disposing a land streamer in-line with first and second shot sources. The first shot source is at a first source location adjacent to a proximal end of the land streamer and the second shot source is at a second source location separated by a fixed length corresponding to a length of the land streamer. Shot gathers can be obtained when the shot sources are fired. In another example, a system includes a land streamer including a plurality of receivers, a first shot source located adjacent to the proximal end of the land streamer, and a second shot source located in-line with the land streamer and the first shot source. The second shot source is separated from the first shot source by a fixed overall length corresponding to the land streamer.

First claim

Therefore, at least the following is claimed:

1. A system for seismic surveying, comprising:
a land streamer including a plurality of receivers spaced between a proximal end and a distal end of the land streamer, the plurality of receivers comprising a proximal end receiver located at the proximal end of the land streamer and a distal end receiver located at the distal end of the land streamer;
a first shot source located in-line with the plurality of receivers and adjacent to the proximal end receiver of the land streamer, where the land streamer has a fixed overall length from the first shot source to the distal end receiver of the land streamer; and
a second shot source located in-line with the plurality of receivers of the land streamer and the first shot source, where the second shot source is located on a side of the first shot source opposite the proximal end of the land streamer and separated from the first shot source by the fixed overall length.

2. The system of claim 1 , further comprising a third shot source located in-line with the plurality of receivers of the land streamer, the first shot source and the second shot source, where the third shot source is located on a side of the second shot source opposite the first shot source and separated from the second shot source by the fixed overall length.

3. The system of claim 1 , wherein the land streamer, the first shot source, and the second shot source are configured to maintain alignment and separation while being displaced.

4. The system of claim 3 , further comprising a seismic recording system configured to record a first shot gather from the plurality of receivers in response to firing the second shot source at a source location.

5. The system of claim 4 , wherein the seismic recording system is communicatively coupled to the plurality of receivers through a plurality of channels.

6. The system of claim 4 , wherein the seismic recording system is further configured to record a second shot gather from the plurality of receivers in response to firing the first shot source at the source location, where the second shot source, the first shot source, and the land streamer are linearly displaced by the fixed overall length to position the first shot source at the source location while maintaining the alignment and separation of the second shot source, the first shot source, and the plurality of receivers of the land streamer, and where an extended shot gather comprises the first shot gather concatenated with the second shot gather.

7. The system of claim 6 , further comprising a vehicle that displaces the second shot source, the first shot source, and the land streamer along a predefined survey route.

8. The system of claim 7 , wherein the displacement of the second shot source, the first shot source, and the land streamer by the vehicle is guided by a global positioning system (GPS).

9. The system of claim 4 , further comprising a computing device configured to control firing of the first and second shot sources and data acquisition by the seismic recording system.

10. The system of claim 3 , wherein the plurality of receivers are secured together at even intervals between the proximal end and the distal end of the land streamer.

11. The system of claim 2 , further comprising a seismic recording system configured to record a first shot gather from the plurality of receivers in response to firing the third shot source at a source location.

12. The system of claim 11 , wherein the seismic recording system is further configured to record a second shot gather from the plurality of receivers in response to firing the second shot source at the source location, where the third shot source, the second shot source, the first shot source, and the land streamer are linearly displaced by the fixed overall length to position the second shot source at the source location while maintaining the alignment and separation of the third shot source, the second shot source, the first shot source, and the plurality of receivers of the land streamer.

13. The system of claim 12 , wherein the seismic recording system is further configured to record a third shot gather from the plurality of receivers in response to firing the first shot source at the source location, where the third shot source, the second shot source, the first shot source, and the land streamer are linearly displaced by the fixed overall length to position the first shot source at the source location while maintaining the alignment and separation of the second shot source, the first shot source, and the plurality of receivers of the land streamer.

14. The system of claim 13 , wherein an extended shot gather comprises the first shot gather, the second shot gather and the third shot gather, which are concatenated together.

15. The system of claim 1 , wherein the first shot source and the second shot source are sequentially fired to obtain corresponding shot gathers using the plurality of receivers without displacement of the land streamer.

Assignees

• Univ King Abdullah Sci & Tech

Inventors

• Mahmoud Sherif
• Schuster Gerard

Classifications

• G01V1/201

  Constructional details of seismic cables, e.g. streamers (integrated optoseismic systems G01V1/226; line connectors in general H01R, transducer mountings in general G10K11/004) · CPC title

• G01V1/09

  Transporting arrangements, e.g. on vehicles (G01V1/38 takes precedence) · CPC title

• G01V1/003 Primary

  Seismic data acquisition in general, e.g. survey design (G01V1/3808, G01V1/42 take precedence) · CPC title