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Modeling method and system for controlling initial wave impedance by use of earthquake attributes

A technology of seismic attributes and modeling methods, which is applied in seismology and seismic signal processing for logging records, and can solve problems such as difficulty in simulating sedimentary facies changes, and achieve the effect of improving accuracy.

Inactive Publication Date: 2016-01-06
中国石油化工股份有限公司江汉油田分公司物探研究院
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method that can reflect the change of sedimentary facies in the lateral direction and improve the accuracy of seismic inversion in view of the defect that it is difficult to simulate the change of sedimentary facies in the horizontal direction by using the traditional interpolation method in the prior art. Modeling Method and System for Controlling Initial Wave Impedance Using Seismic Attributes

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  • Modeling method and system for controlling initial wave impedance by use of earthquake attributes
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  • Modeling method and system for controlling initial wave impedance by use of earthquake attributes

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[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0030] Seismic inversion needs to establish an initial wave impedance model, and the quality of the initial model is related to the accuracy of seismic inversion.

[0031] Such as figure 1 As shown, the modeling method of using seismic attributes to control the initial wave impedance in the embodiment of the present invention mainly includes the following steps:

[0032] S1. Obtain logging wave impedance value, coordinates, seismic interpretation horizon and fault data;

[0033] S2, read the coordinates, horizon and seismic attribute information of the current seismic trace;

[0034] S3. In the longi...

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Abstract

The invention discloses a modeling method and system for controlling initial wave impedance by use of earthquake attributes. The method comprises the following steps: obtaining logging wave impedance values, coordinates, earthquake interpretation stratums and tomography data; reading coordinates, stratums and earthquake attribute information of a currently modeling earthquake channel; calculating time, corresponding to an i-th well, of the modeling earthquake channel at a certain time point, and correcting the time; taking a similarity coefficient of the earthquake attributes as an interpolation weight coefficient, and finishing calculation of all wells according to an interpolation formula to obtain initial wave impedance values of the time point; and finishing calculation of all points of the modeling earthquake channel to obtain an initial model of the channel. The method provided by the invention is characterized in that: longitudinally, interpolation time corresponding to each well is corrected according to correlation of earthquake data; and horizontally, a conventional "inverse distance" interpolation is replaced by use of similarities of the earthquake attributes so that the matching degree between the model and a geological deposition rule is improved. The method and system provided by the invention improve the precision of seismic inversion.

Description

Technical field [0001] The invention relates to the technical field of seismic oil and gas exploration, in particular to a modeling method and system for controlling initial wave impedance by using seismic attributes. Background technique [0002] Traditional modeling methods generally adopt the reciprocal of the distance to the well (inverse distance method, weight i =1. / dis i ), this is a linear interpolation method, and it is generally difficult to simulate sedimentary facies changes. As a result, circles are often drawn around the well, and the boundary of the geological body is not accurately reflected. Summary of the invention [0003] The technical problem to be solved by the present invention is: in view of the defect that traditional interpolation method is difficult to simulate sedimentary facies changes in the lateral direction in the prior art, it provides a method that can reflect changes in sedimentary facies laterally and can improve the accuracy of seismic inversio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/48
Inventor 刘贤红张水山霍浩
Owner 中国石油化工股份有限公司江汉油田分公司物探研究院
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