Active noise injection computations for improved predictability in oil and gas reservoir discovery and characterization

An attribute, subsurface technology, applied in the field of active noise injection calculation to improve the predictability of oil and gas field discovery and characterization, can solve the problems of expensive exploratory wells and no production
CN102893183AInactive Publication Date: 2013-01-23VIALOGY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
VIALOGY
Publication Date
2013-01-23
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

Application of nonlinear resonance interferometry is introduced as a new geophysical approach to improve predictability in characterization of subsurface porosity, rock and fluid properties. In contrast to reflection methods that remove random information noise, nonlinear resonance interferometry exploits the full seismic acquisition spectrum to assess how low frequency and high-frequency noise is differentially and directly modulated by varying levels of porosity and hydrocarbon content in the lithologies of interest. In some examples, systems and techniques implement novel computational interactions between acquired seismic wavefield attributes and a nonlinear system in software to amplify distortions in seismic noise and exploits injection of synthetic noise, in software format, to detect hydrocarbon traps and lithology changes at spatial scales below seismic resolution, thereby increasing the information value of low-resolution data. The techniques are broadly applicable to de-risking conventional clastic and carbonate reservoirs and non-conventional shale gas resource prospects.
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Description

[0001] This application claims the benefit of US Provisional Application 61 / 311,277, entitled "Active Noise Injection Computations For Improved Predictability In Reservoir Characterization," filed March 5, 2010, which is incorporated herein by reference in its entirety. Background technique

[0002] During oil and gas exploration, seismic surveys are used to estimate features of interest in subsurface landforms. Seismic surveys use controlled seismic energy, such as that produced by specialized air guns or seismic vibrators. The receivers detect seismic energy, usually in the form of waves, reflected by subsurface features. These subsurface features are detected by analyzing the time it takes for reflected seismic waves to travel through subsurface material of varying densities. Three-dimensional seismic mapping also uses seismic energy to produce three-dimensional maps of subsurface cambiums. Traditional techniques for analyzing seismic data attempt to filter out noise to i...

Claims

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