Refined restoration method for ancient karst landform

A paleogeomorphological restoration and karst technology, applied in the field of oil and gas field exploration, can solve the problems of low accuracy, large lateral changes, and low resolution

Inactive Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The deposition of strata above the denuded surface is unstable, and affected by tectonic movements, there may be structural inversion. Therefore, no standard layer with relatively stable deposition in the entire area can be found on the denuded surface, which leads to the use of, for example, the impression method The error of the recovered karst paleogeomorphology results is too large;
[0005] 2) The thickness of the re...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Refined restoration method for ancient karst landform
  • Refined restoration method for ancient karst landform
  • Refined restoration method for ancient karst landform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] figure 1 It is a working flowchart of the landform restoration method in the embodiment of the present invention. from figure 1 It can be seen that the method mainly includes three steps: inversion, tracking and restoration.

[0031] S100, an inversion step. This step is mainly to use the original seismic data and logging data of the target layer to carry out spectrum inversion to obtain the seismic reflection coefficient data volume. The specific process is as follows:

[0032] S101. The original time-domain seismic data volume of the target layer is s(t), and its expression is:

[0033] s(t)=w(t)*r(t)+n(t) (1)

[0034] Perform Fourier transform on s(t) to obtain the corresponding frequency domain data volume S(f), its expression is:

[0035] S ( f ) ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a refined restoration method for an ancient karst landform. According to the method, spectra inversion is carried out by using original seismic data and logging data of a target stratum, thereby obtaining a seismic reflection coefficient data volume; positions, at the reflection coefficient data volume, of a top boundary and a bottom boundary of the target stratum at the logging position can be calibrated according to the logging data, tracking is carried out automatically by using the calibrated top boundary and bottom boundary as seed points, thereby obtaining the positions of the top boundary and bottom boundary of the whole target stratum at the reflection coefficient data volume; subtraction of the top boundary and the bottom boundary of the whole target stratum is carried out to obtain a residual thickness of the target stratum; and then the ancient karst landform of the target stratum is restored by using the residual thickness method. With the method, the restoration precision of the ancient karst landform can be improved and the exploration economic benefits of the karst reservoir can be improved effectively.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploration, in particular to a fine karst ancient landform recovery method. Background technique [0002] For a long time, in the field of petroleum exploration technology, paleogeomorphology restoration technology is a commonly used technology in karst reservoirs. Using the recovered paleogeomorphology, the distribution of karst highlands, karst slope areas and karst depressions can be clarified, so as to quickly determine the favorable areas for the development of karst reservoirs. At present, a variety of karst paleogeomorphological restoration methods have been developed at home and abroad. For example, the impression method, the residual thickness method, the sequence stratigraphy method, and the sedimentology method are the most widely used exploration techniques in the restoration of karst paleogeomorphology. [0003] When the above method is applied in practice, due to the imp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01V1/28
Inventor 胡东风陈祖庆李金磊肖伟孙均屈大鹏赵卓男
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap