Forward modeling method and device for nonequivalent wave field

A technique for forward modeling, non-equivalent volumes

Active Publication Date: 2013-02-06
PETROCHINA CO LTD
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Problems solved by technology

Therefore, there are certain errors in the wave field analysis based on 2D simulation and the subsequent reservoir prediction technology

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  • Forward modeling method and device for nonequivalent wave field
  • Forward modeling method and device for nonequivalent wave field
  • Forward modeling method and device for nonequivalent wave field

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[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Research has proved that the 2.5D (2.5-dimensional) wave field simulation is a cylindrical wave, which is closer to the spherical wave, and the calculation time is greatly reduced compared with the three-dimensional simulation. In view of the above problems, the present invention uses a modeling method combining field outcrop analysis,...

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Abstract

The embodiment of the invention provides a forward modeling method and a device for a nonequivalent wave field. The forward modeling method comprises the following steps: establishing a nonequivalent model according to analysis of a field outcrop, imaging logging data and conventional logging data; carrying out forward modeling on the nonequivalent model by adopting a 2.5D wave field simulation algorithm; and carrying out time frequency analysis on the result of the forward modeling so as to predict the position of a storage layer. The forward modeling method has the following advantages that firstly, the nonequivalent model for accurately reflecting an underground geological body is established by fully utilizing reliable information such as the field outcrop, the imaging logging data and the conventional logging data; secondly, the spreading condition of an earthquake wave is really reflected by using 2.5D simulation technology and the foundation is laid for next analysis; and thirdly, the favorable position of the storage layer is accurately predicted by time frequency analysis of the data.

Description

technical field [0001] The present invention relates to the field of oil and gas field exploration, specifically, the present invention relates to the stage of oil field exploration, applicable to the understanding of seismic wave field propagation, the study of seismic response characteristics of carbonate reservoirs and the identification of favorable targets in carbonate reservoirs, which is an improvement on conventional An improvement in modeling, wave field simulation. Background technique [0002] Ordovician fractured-vuggy carbonate reservoirs in western China have become a hotspot in exploration and development. The complex diagenesis and reservoir space evolution history lead to its unique reservoir space dominated by fractured caves. Compared with traditional clastic rock reservoirs, fracture-cavity reservoirs have stronger heterogeneity. Therefore, how to effectively describe and understand the propagation of seismic waves in heterogeneous carbonate reservoirs is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
Inventor 李胜军刘伟方高建虎雍学善李海亮
Owner PETROCHINA CO LTD
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