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Offshore earthquake measurement method and system

A technology of seismic sources and control components, applied in the field of completion of marine seismic data acquisition and measurement

Active Publication Date: 2010-09-08
WESTERNGECO SEISMIC HLDG LTD
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  • Abstract
  • Description
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Problems solved by technology

However, none of these systems depend on or take into account a wide range of input conditions and parameters, including the various purposes and constraints of seismic survey equipment and methods
Again, none of these systems attempt to actively control the spread with a set of coordinated guides deployed throughout the spread area (including both sources and receivers), so such complex systems are required

Method used

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  • Offshore earthquake measurement method and system
  • Offshore earthquake measurement method and system
  • Offshore earthquake measurement method and system

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Embodiment Construction

[0079] Figures 1A-1B A typical marine seismic data acquisition survey spread (also simply "spread") 10 for conducting a 3D seismic survey is illustrated. Spread 10 is characterized by a number of components, some of which are controllable, referred to as spread control components. The deployment components typically include one or more marine vessels 11, such as that described in US Patent 6,216,627, and a plurality of components towed by at least one of the vessels. The towed components include cables, such as drop cables 20, transverse lines 26, streamers 18, source streamers and pressure lines (both denoted as 15) and sources 16 and hydrophones 21 on the streamers, and Steering devices such as deflector 22, streamer diverter 38 and source diverter 17.

[0080] The spread components may further include one or more transport vessels (not shown) not tied to one or more survey vessels, such as the unmanned powered vessels described in US Patent 6,028,817, US Patent 6,474,254...

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Abstract

The invention relates to a method for controlling an earthquake measurement spread during earthquake measurement. The spread is provided with a ship, a plurality of spread control elements, a plurality of navigation nodes, a plurality of earthquake focuses and receivers. The method comprises the step of input data collection, wherein input data comprise navigation data of the navigation nodes, operation state data generated along with a sensor of the spread control elements, measurement environment data and measurement design data. The positions of the earthquake focuses and the receivers are evaluated by using the navigation data, the operation state data and the measurement environment data. The best path lines of the earthquake focuses and the receivers are determined by utilizing the position evaluation and at least one part of input data including the measurement data. A driving instruction for at least two spread control elements is calculated by using the determined best path line. The method is realized by the system provided by the invention.

Description

[0001] This divisional application is based on the divisional application of the Chinese patent application with the application number 200480042924.2 (the international application number is PCT / US2004 / 008029), the application date is March 17, 2004, and the invention title is "Marine Seismic Measurement Method and System" Application. technical field [0002] This invention relates generally to the completion of marine seismic data acquisition surveys and, more particularly, to the control of seismic survey spreads during surveys. Background technique [0003] Completing a marine seismic data acquisition survey typically involves one or more survey vessels, each towing at least one seismic streamer through a body of water believed to overlie one or more hydrocarbon-bearing formations. In order to complete the 3D marine seismic data acquisition survey, the seismic survey ship tows an array of marine seismic streamers behind the ship at a speed of about 5 knots. Each streame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/38
CPCG01V1/3817G01V1/008G01V1/01
Inventor 肯·维尔克尔比德·泰勒
Owner WESTERNGECO SEISMIC HLDG LTD
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