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Method for improving seismic data resolution capacity based on system identification

A technology for system identification and seismic data, applied in the fields of seismology and seismic signal processing for logging records

Inactive Publication Date: 2008-01-23
中国石化集团胜利石油管理局有限公司
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Problems solved by technology

At present, there are no reports at home and abroad on the use of system identification methods and the joint application of high-resolution profiles to improve the resolution of surface seismic data

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  • Method for improving seismic data resolution capacity based on system identification
  • Method for improving seismic data resolution capacity based on system identification
  • Method for improving seismic data resolution capacity based on system identification

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Embodiment Construction

[0108] Further description below in conjunction with the accompanying drawings and examples, this implementation example is only a part of the present invention, and should not be used as limiting the scope of the present invention.

[0109] For Shengli Oilfield Ken 71 well area, the method for improving the resolution of surface seismic data by using cross-well seismic data and surface seismic data is implemented below. The extension can integrate the information of high and low frequency sections, and restore the missing high frequency information in the low frequency section under the condition of keeping the stratum occurrence and the original layer information basically unchanged, and improve its vertical resolution.

[0110] The implementation plan is:

[0111] (1) High-resolution profile preprocessing

[0112] Multi-scale geophysical techniques such as well logging, cross-well seismic and surface seismic can reflect the properties of the same target object in the subsu...

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Abstract

The invention discloses a method for improving the resolution of technical materials for earthquake based on system identification, which essentially comprises the following procedures: (I) a section of high resolution is pre-processed; (II) a model of stratum absorbing system is configured; (III) the system identification of the model of stratum absorbing system is realized, which comprises (1) the realization of the basic structure of system identification, (2) the realization of the non-parameter system model for system identification, and (3) the realization of the parameter system model for system identification; (IV) the system structure of the stratum absorbing model is proved; (V) the system response of the stratum absorbing model is worked out; (VI) the extrapolation of the 3D space of the response of the stratum absorbing model is conducted; (VII) the hi-frequency expansion of the technical materials for the ground earthquake is realized. The invention comprehensively uses the geophysical materials from different dimensions about well logging, between-well earthquake and ground earthquake, etc. to recover with high frequency and high fidelity the technical materials on ground earthquake by using a system identification method, is of great importance for the accurate description and accurate recognization of the micro structure for the reservoir stratum at the after stage of development in an oil field.

Description

technical field [0001] The invention relates to the joint application of multi-scale geophysical data in the field of petroleum geophysical exploration, and uses modern signal processing technology to improve the resolution of ground seismic data. Specifically, it is a method for improving the resolution of seismic data based on system identification. Background technique [0002] Improving the resolution of surface seismic data has always been a hot and difficult research topic at home and abroad. It has great theoretical and practical value in oilfield exploration and development. Due to the anelasticity and heterogeneity of the formation medium, the propagation of seismic waves in the formation must undergo absorption, that is, attenuation and dispersion. Understanding, estimating, and compensating for this absorption of seismic waves are very important for improving the resolution of seismic data. , and it is difficult to obtain accurate formation absorption informatio...

Claims

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Application Information

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IPC IPC(8): G01V1/50
Inventor 刘浩杰王延光韩文功
Owner 中国石化集团胜利石油管理局有限公司
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