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Intra-bed source vertical seismic profiling

A vertical seismic section and seismic technology, applied in the field of geophysical exploration, can solve problems such as dispersion and attenuation

Inactive Publication Date: 2015-07-15
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the target area of ​​interest is located in a very deep zone formed by superimposed formations with high interface acoustic impedance (for example, salt and carbonate layers, basalt rock beds, etc.), the aforementioned VSP technology is also insufficient, because Most seismic signals are attenuated or dispersed by highly reflective interfaces in the subsurface (e.g., seafloor, salt top, salt bottom, carbonate platforms, basalt sills, etc.)

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  • Intra-bed source vertical seismic profiling
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  • Intra-bed source vertical seismic profiling

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Embodiment Construction

[0018] One or more embodiments of the disclosed apparatus and methods are described herein by way of example and not limitation with reference to the accompanying drawings.

[0019] figure 1 A cross-sectional view of the system 100 is acquired for onshore vertical seismic profiling (VSP) according to an embodiment. The illustrated VSP system 100 includes a borehole source 110 that emits seismic waves 120 . However, in alternative embodiments, two or more seismic sources 110 may be placed in close proximity to each other. The seismic source 110 may be an explosive, an air gun, pyrotechnics, or some other known source of the seismic signal 120 capable of being ignited within the borehole 130 . The source 110 is shown located within a first borehole 130 penetrating a formation 140 including a target zone of interest 180 . The source 110 is placed below the highly reflective interface 150, as figure 1 shown. figure 1 A relatively regular reflective interface 155 is also shown...

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Abstract

A system and method obtain a Vertical Seismic Profile (VSP). The system includes a seismic source disposed in a first borehole at a first depth greater than an identified depth of a interface, the seismic source configured to emit seismic waves. The system also includes one or more receptors disposed in a second borehole that includes a target region of interest, the one or more receptors configured to receive direct and reflected components of the seismic waves.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Application No. 13 / 621623, filed September 17, 2012, the entire contents of which are hereby incorporated by reference. technical field [0003] This invention relates to geophysical prospecting, and more particularly to borehole seismic prospecting. Background technique [0004] In the field of mineral and petroleum exploration, geophysical methods have been necessary for decades to map the subsurface, improve the ability to find hydrocarbons, and reduce costs in exploration, drilling, and production activities. In this sense, reflection seismometry is the most widely used geophysical method in petroleum exploration for mapping basin structure and potential oil and gas reservoirs because of the method's ability to record information from different formations in the subsurface. Because the acoustic signals associated with different formations arrive at different times, reflection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/42
CPCG01V1/42G01V2210/1299G01V2210/1429G01V2210/161
Inventor D·F·弗雷塔斯
Owner BAKER HUGHES INC