Fluid identification method and fluid identification device

A fluid identification and antibody technology, applied in the field of geological exploration, to achieve the effect of improving accuracy

Active Publication Date: 2016-04-20
PETROCHINA CO LTD
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Problems solved by technology

[0005] However, how to identify the fluid accurately and effectively has not yet proposed an effective solution

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  • Fluid identification method and fluid identification device
  • Fluid identification method and fluid identification device
  • Fluid identification method and fluid identification device

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0046] In view of the fact that when seismic waves propagate in subsurface fluid-bearing media, reflected wave energy attenuation and velocity dispersion will occur in different frequency bands and different scales, and this phenomenon is mainly caused by the existence of reservoir pore fluid. As an extension and supplement of conventional reservoir elastic information, the dispersion attribute shows the high-frequency and low-frequency information covered by the main frequency component in seismic data from another angle, and is useful for the identification of lithology and subtle oil and gas ...

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Abstract

The invention provides a fluid identification method and a fluid identification device, wherein the fluid identification method comprises the steps of acquiring a prestack angle gather data volume of a researched area; performing angled stacking on the prestack angle gather data volume seismic data for obtaining an angled-stacked data volume; performing prestack AVO inversion on the angled-stacked data volume for obtaining a longitudinal-wave impedance body and a density body; performing time-frequency decomposition processing on the longitudinal-wave impedance member for obtaining a dividing frequency impedance body; performing inversion operation on the dividing frequency impedance body according to the density body, thereby obtaining a reservoir seismic frequency dispersion attribute on the researched area; and performing fluid identification according to the reservoir seismic frequency dispersion attribute. The fluid identification method and the fluid identification device settle a technical problem of incapability of accurately and effectively performing fluid identification in prior art and realizes a purpose of accurately identifying fluid.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a fluid identification method and device. Background technique [0002] With the continuous improvement of exploration and development, the exploration target has gradually changed from the initial structural oil and gas reservoirs to lithologic and subtle oil and gas reservoirs, and the exploration strategy has also changed from the initial search for structural traps to the search for lithological anomalies or directly Perform a fluid test. In recent years, the method of inverting reservoir elastic parameters based on seismic data has been widely used in reservoir prediction, and the purpose of reservoir prediction is no longer limited to the identification of structural and lithological traps, but to Fluidity (including fluid type and fluid saturation) is detected, which puts forward higher requirements for fluid identification technology. [0003] In the 1970...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V1/307G01V2210/622G01V2210/624G01V2210/647
Inventor 王磊王天奇史忠生方乐华张静何巍巍白洁贾义蓉薛罗马凤良陈彬滔马轮
Owner PETROCHINA CO LTD
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