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Seismic horizon skeletonization

A technology of seismic reflection and seismic data volume, which is applied in seismology, seismic signal processing, seismology for well logging, etc., and can solve the problems of undisclosed surface generation, undisclosed topology or topological consistency, and undisclosed Issues such as surface cracking or merging

Active Publication Date: 2011-05-18
EXXONMOBIL UPSTREAM RES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems introduced by the third dimension are neither discussed nor resolved
However, this reference does not disclose the creation of surfaces, nor does it disclose breaking or merging of surfaces, nor does it disclose topology or topological consistency

Method used

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  • Seismic horizon skeletonization
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Embodiment Construction

[0057] To look for hydrocarbon buildup in Earth, geoscientists are using remote sensing methods to look below the Earth's surface. A conventionally used technique is the seismic reflection method, in which artificial sound waves are generated near the surface. Sound travels into the earth, and whenever a sound travels from one rock layer to another, a small portion of the sound is reflected back to the surface that recorded it. Typically, hundreds to thousands of recording instruments are employed. Sound waves are excited sequentially at many different locations. From all these records, two-dimensional (2D) or three-dimensional (3D) subsurface images can be obtained after data processing. Seismic interpretation often involves picking surfaces to characterize the subsurface in order to characterize the subsurface relevant to the detection, identification, and production of hydrocarbons. This invention describes methods for picking multiple surfaces simultaneously. That is, ...

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Abstract

Method for analysis of hydrocarbon potential of subterranean regions by generating surfaces or geobodies and analyzing them for hydrocarbon indications. Reflection-based surfaces may be automatically created in a topologically consistent manner where individual surfaces do not overlap themselves and sets of multiple surfaces are consistent with stratigraphic superposition principles. Initial surfaces are picked from the seismic data (41), then broken into smaller parts (''patches'') that are predominantly topologically consistent (42), whereupon neighboring patches are merged in a topologically consistent way (43) to form a set of surfaces that are extensive and consistent (''skeleton''). Surfaces or geobodies thus extracted may be automatically analyzed and rated (214) based on a selected measure (213) such as one or more direct hydrocarbon indications (''DHI''), e.g. AVO classification. Topological consistency for one or more surfaces may be defined as no self overlap plus local and global consistency among multiple surfaces (52).

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application 61 / 128,547, filed May 22, 2008; U.S. Provisional Application 61 / 131,484, filed June 9, 2008; and U.S. Provisional Application 61 / 14, filed April 14, 2009 169,122 in equity. technical field [0003] The present invention relates generally to the fields of geophysical and geological exploration, and more particularly to the analysis of seismic data. Specifically, the present invention is a method for highlighting regions likely to contain hydrocarbons generating targets such as surfaces and geobodies and automatically analyzing them. A specific embodiment of the invention is the simultaneous generation and analysis of many stratigraphically consistent surfaces from a seismic data volume. Background technique [0004] Reduction of seismic data volumes to their internal reflection-based surfaces or horizons is advantageous in seismic data processing and interpretation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
CPCG01V1/32G01V2210/63G01V2210/66G01V2210/641G01V2210/48G01V2210/643G01V1/302G01V1/345
Inventor M·英霍夫D·G·吉拉德S·哈森诺德P·迪米特洛夫M·J·特雷尔K·古玛南F·W·施罗德
Owner EXXONMOBIL UPSTREAM RES CO
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