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Method and device for predicating sand body thicknesses through logging constraint wave impedance inversion

A wave impedance inversion and sand body thickness technology, applied in the field of oil and gas exploration, can solve single and difficult problems, and achieve the effects of good vertical stratification, improved reliability and rich content

Active Publication Date: 2013-12-18
PETROCHINA CO LTD
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Problems solved by technology

For formations with complex geological conditions, varying thickness of reservoirs, and large changes in physical properties, it is difficult to find out the characteristics and distribution of the reservoirs using only a single conventional method

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  • Method and device for predicating sand body thicknesses through logging constraint wave impedance inversion
  • Method and device for predicating sand body thicknesses through logging constraint wave impedance inversion

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0033] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] see figure 1 as shown, figure 1 A method for predicting the thickness of a sand body using logging-constrained wave impedance inversion according to an embodiment of the present invention, the method includes the following steps:

[0035] Step 101: Acquiring corresponding seismic data and geological logging data after performing seismic exploration drilling sampling in the target exploration are...

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Abstract

The invention provides a method and device for predicating sand body thicknesses through logging constraint wave impedance inversion. The method includes the steps of acquiring corresponding seismic data and geological logging data after carrying out seismic exploration drilling sampling in a target exploration area, carrying out logging constraint wave impedance inversion on the target exploration area according to the seismic data with the geological logging data as constraint conditions to obtain a logging constraint wave impedance inversion model of the target exploration area, selecting a plurality of sampling points respectively and evenly for each sand group in the target exploration area on an inversion section of the logging constraint wave impedance inversion model to obtain sand body total wave impedance values of corresponding sand groups and sand body thickness relation curves of the corresponding sand groups through fitting, and obtaining the sand body thicknesses of the corresponding sand groups according to the relation curves. The method and device for predicating the sand body thicknesses through logging constraint wave impedance inversion improve reliability of sand body distribution and thickness prediction in stratums with complicated geological conditions, different reservoir stratum thicknesses and large physical property changes.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for predicting the thickness of sand bodies by means of logging constrained wave impedance inversion. Background technique [0002] In geological exploration, currently commonly used sand body thickness technologies include seismic attribute extraction technology and log-constrained wave impedance inversion technology. [0003] Seismic attribute extraction refers to the specific measurement of the geometric shape, kinematic features, dynamic features and statistical features of seismic waves derived from seismic data through mathematical transformation. The propagation of seismic waves in the formation is a complex process, which is a comprehensive reflection of the characteristics of the underground formation. The characteristics of the seismic signal are directly caused by the physical properties of the formation and its variation. The spa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/48G01V1/50
Inventor 蔡刚姚军苏明军张兆辉倪长宽
Owner PETROCHINA CO LTD
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