Seismic horizon calibration method utilizing vertical seismic profiling (VSP) and well-logging combination

A horizon calibration and well logging technology, applied in the field of seismic exploration data interpretation, can solve problems such as unsatisfactory reservoir calibration, time-consuming, inconsistent polarity, etc.

Active Publication Date: 2015-05-27
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF3 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the VSP horizon calibration also has the following problems: (1) The VSP velocity is the average velocity of the formation, and the stacking velocity of the seismic data is the equivalent velocity, and the corresponding time waveforms of the two are inconsistent; (2) The VSP logging detector is placed in the well , there is no half-wave loss, but the ground geophone is buried on the ground and is located on the half-space interface of the elastic medium, so there is a half-wave loss, which causes the polarity of the two to be inconsistent (the VSP corridor superposition section is a negative p

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
  • Seismic horizon calibration method utilizing vertical seismic profiling (VSP) and well-logging combination
  • Seismic horizon calibration method utilizing vertical seismic profiling (VSP) and well-logging combination
  • Seismic horizon calibration method utilizing vertical seismic profiling (VSP) and well-logging combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] The specific implementation steps of the present invention are as follows:

[0065] 1) VSP measures and obtains the P-wave time-depth relationship (H i , T vsp,i );

[0066] 2) According to the zero well source distance data, the corridor stacking section is obtained through true amplitude restoration, zero phase deconvolution, wave field separation, corridor cutting and stacking processing;

[0067] 3) Log and obtain acoustic logging and density logging data; if there is no density logging curve, use Gardner empirical formula to obtain density data, Gardner empirical formula is: ρ=0.31·ν 0.25 .

[0068] 4) Calculate the time-depth relationship of the sound wave (H i , T AC,i ), calculate the time difference with the time-depth relationship of VSP, and then correct the acoustic wave curve ( figure 1 ); Calculate the time-depth relationship of the sound wave (H i , T AC,i ) formula is:

[0069] T AC , ...

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 relates to a seismic horizon calibration method utilizing a vertical seismic profiling (VSP) and well-logging combination. The seismic horizon calibration method comprises the following steps: measuring and obtaining a longitudinal wave time-depth relationship and a corridor stacking profile according to zero offset data, performing well logging and obtaining acoustic well logging and density well logging data, calculating an acoustic wave time-depth relationship and a VSP time-depth relationship to get time difference, correcting an acoustic wave curve, obtaining a synthetic record through corrected well-logging curve and seismic wavelet convolution, making a horizon calibration chart after the time shift quantity of a VSP corridor and the correct polarity are determined and performing horizon calibration on a ground seismic profile according to known drilling geological stratification. According to the seismic horizon calibration method, the acoustic well logging error and the frequency dispersion effect are eliminated, the synthetic record making precision is improved, human factors in the calibration are reduced, and the calibration accuracy is improved.

Description

technical field [0001] The invention belongs to the field of seismic exploration data interpretation, and in particular relates to a method for calibrating seismic horizons in combination with vertical seismic profile VSP (Vertical Seismic Profiling) and well logging. Background technique [0002] Seismic exploration is an exploration method that artificially induces crustal vibrations and describes the underground geological conditions. Conventional seismic exploration arranges excitation points near the surface, and the excitation produces seismic waves that propagate downward and reflect upward after encountering a reflective layer. Geophones are placed on the ground to receive the reflected waves from the underground interface. This seismic exploration method obtains the geological information of the reflection interface, which is finally displayed in the form of events on the seismic section. It only has the concept of time domain and lacks the concept of depth domain. ...

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): G01V1/40
Inventor 陈沅忠李彦鹏赵海英杜金玲
Owner BC P INC CHINA NAT PETROLEUM 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