Ray Impedance Inversion Method and Device for Angular Partially Stacked Gathers

A ray elastic impedance and angle technology, applied in the field of petroleum geophysical exploration, can solve the problems of difficult identification, high investment risk, complex accumulation conditions, etc. Effect

Active Publication Date: 2018-07-13
PETROCHINA CO LTD
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Problems solved by technology

Lithologic oil and gas reservoirs are different from structural oil and gas reservoirs. These new reservoirs are affected by structure and reservoir heterogeneity, with complex accumulation conditions, difficult identification, and high investment risks

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  • Ray Impedance Inversion Method and Device for Angular Partially Stacked Gathers
  • Ray Impedance Inversion Method and Device for Angular Partially Stacked Gathers
  • Ray Impedance Inversion Method and Device for Angular Partially Stacked Gathers

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Embodiment Construction

[0066] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention.

[0067] In this embodiment of the present invention, a ray impedance inversion method oriented to partial stacked gathers of angles is proposed, figure 1 Be the flow chart of the present invention in the embodiment, as figure 1 As shown, the ray impedance inversion method for angular partial stack gathers includes the following steps:

[0068] S101: Establish a ray imped...

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Abstract

The invention discloses a ray impedance inversion method orienting an angle partial stack gather and a device thereof, and relates to the technical field of geophysical prospecting for petroleum. The method comprises the steps that a ray impedance equation is established based on the start angle and the end angle of the ray impedance inversion angle partial stack gather; a ray impedance pseudo well curve is obtained based on longitudinal wave velocity, transverse wave velocity, a density logging curve and the angle range of the angle partial stack gather through the ray impedance equation; angle wavelets are obtained based on the angle partial stack gather and the ray impedance pseudo well curve; a constraint model reflecting the stratum form is obtained according to the angle partial stack gather, stratum information and the ray impedance pseudo well curve; model constraint sparse pulse inversion is performed according to the angle wavelets, the angle partial stack gather and the constraint model so that the ray elastic impedance data of different angle ranges are obtained; and longitudinal wave impedance and transverse wave impedance are obtained based on the ray elastic impedance data through extraction. The precision of the inversion result can be effectively enhanced.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical exploration, in particular to a ray impedance inversion method and a device thereof for angle partial superimposed gathers. Background technique [0002] Early reservoir prediction techniques using pre-stack seismic data mainly include pre-stack AVO inversion method and elastic impedance inversion method. Compared with the pre-stack AVO inversion method, the elastic impedance inversion method has better anti-noise partial stacked seismic gathers, and the elastic impedance inversion method has the advantages of pre-stack AVO attribute inversion and post-stack wave impedance inversion. Using the same process as post-stack wave impedance inversion, the elastic impedance body containing fluid information can be inverted. In order to improve the accuracy of the elastic impedance inversion method, many scholars have proposed different types of elastic impedance formulas. One of them is c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 高建虎桂金咏李胜军刘炳杨
Owner PETROCHINA CO LTD
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