Method and device for recognizing hidden reservoirs by underground reverse-time migration imaging

A technology of reverse time migration imaging and pre-stack reverse time migration, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problem of insufficient resolution of deep formations, difficulty in describing small geological structures and fine changes in reservoirs, etc. problems, to achieve good promotion and application prospects, eliminate the impact of direct waves, and good application effects

Active Publication Date: 2014-04-30
PETROCHINA CO LTD
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Problems solved by technology

Due to the limitation of seismic resolution, this method can only give a thick-line image of a large-scale stratigraphic structure, and its resol

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  • Method and device for recognizing hidden reservoirs by underground reverse-time migration imaging
  • Method and device for recognizing hidden reservoirs by underground reverse-time migration imaging
  • Method and device for recognizing hidden reservoirs by underground reverse-time migration imaging

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[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] figure 1 It is a flowchart of a method for identifying hidden reservoirs by downhole reverse time migration imaging according to an embodiment of the present invention. As shown in the figure, the method for identifying hidden reservoirs in this embodiment includes:

[0022] Step S101: Obtain remote detection sonic logging data and related conventional and electrical imaging logging data; Step S102: Preprocess the remote detection s...

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Abstract

The embodiment of the invention provides a method and a device for recognizing hidden reservoirs by underground reverse-time migration imaging. The method comprises the following steps: obtaining remote-exploration sound wave logging information and general and electro-imaging logging information relating to the same; pretreating the remote-exploration sound wave logging information, and extracting longitudinal and transverse wave time different information; extracting reflected wave information from the remote-exploration sound wave logging information by using a multi-scale relevant comparison method; generating reverse-time migration imaging result according to the longitudinal and transverse wave time different information and the reflected wave information by using a seismic pre-stack reverse-time migration algorithm; determining position and depth of the hidden reservoir according to the reverse-time migration imaging result by combining with the general and electro-imaging logging information. According to the method and the device for recognizing the hidden reservoirs by underground reverse-time migration imaging, the veracity and the accuracy of the reverse-time migration imaging can be improved, very good application effect in field application of oil fields are achieved, and the missing rate of the hidden reservoirs are effectively lowered.

Description

technical field [0001] The invention relates to the field of identification of carbonate karst reservoirs, in particular to a method and device for identifying hidden reservoirs by downhole reverse time migration imaging, which can identify hidden reservoirs and describe the depth range and reservoir of oil and gas reservoirs. The distance from the layer to the wellbore wall in the direction of the wellbore diameter. Background technique [0002] As we all know, well logging technology is an important means of downhole oil and gas exploration. It is to measure various physical information of formations with instruments that respond to physical properties such as acoustic, electric, magnetic and radioactive. By analyzing these information according to their respective physical principles and They are connected to each other for data processing and interpretation, to identify the development part of the downhole reservoir, and to further quantitatively calculate or qualitative...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 李宁郭宏伟王兵武宏亮肖承文张宫冯庆付
Owner PETROCHINA CO LTD
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