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Method for oil gas water recognition by employing longitudinal wave seismic exploration post-stack data

A technology for seismic exploration and seismic data, applied in seismology for logging records, seismic signal processing, etc., can solve problems such as insignificant effects, and does not involve P/S wave information or Poisson's ratio information, so as to facilitate popularization and application , quickly provide results, and collect fast effects

Inactive Publication Date: 2009-07-22
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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Problems solved by technology

[0006] The above-mentioned patent documents still use seismic pre-stack data, and involve flat-point seismic processing and interpretation, and the effect is still not obvious. This scheme does not involve the P-wave information or Poisson’s ratio information in the P-wave seismic exploration post-stack data.

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  • Method for oil gas water recognition by employing longitudinal wave seismic exploration post-stack data
  • Method for oil gas water recognition by employing longitudinal wave seismic exploration post-stack data
  • Method for oil gas water recognition by employing longitudinal wave seismic exploration post-stack data

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Embodiment approach

[0039] Step 1: Acoustic full-wave train logging data collection: Collect the P- and S-wave logging curves of all wells in the seismic work area and convert them into Poisson’s ratio curves. The conversion formula is: σ = 2 - γ 2 2 ( 1 - γ 2 ) , where γ represents the ratio of P-to-S waves velocity, and σ represents Poisson’s ratio;

[0040] In modern logging technology, it includes acoustic full-wave train logging, which is to record the waveforms of sliding longitudinal wave, sliding shear wave, see Rayleigh wave and tube wave successively arriving at the receiver after the acoustic pulse is emitted, among which the longitudinal and transverse wave information and the P...

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Abstract

The invention discloses an oil-gas-water identifying method adopting post-stack information of longitudinalwave seismic prospecting, comprising the following steps: collecting velocity data of P wave and S wave or Poisson ratio data of array sonic logging information, processing and interpreting seismic profile, matching the logging information with seismic channels besides a well, establishing mapping relation between the logging information and the seismic channels besides the well, and applying the mapping relation to other seismic channels, namely extrapolation to obtain the inversional curves of the corresponding seismic channels. The invention adopts the information of the P wave and S wave or Poisson ratio of the involved post-stack seismic data, has evident identifying effect, completely gets rid of the oil-gas-water predicting method by pre-stack data and the multi-wave prospecting method in the prior art, has high collection speed, saves large collecting cost and is convenient for popularization and application.

Description

technical field [0001] The invention relates to the technical field of seismic exploration in petroleum and natural gas exploration and development, in particular to a method for identifying oil, gas and water using longitudinal and transverse wave information or Poisson's ratio information in post-stack data of longitudinal wave seismic exploration. Background technique [0002] The identification of oil, gas and water is an important content in oil and gas exploration and development, especially in areas where gas and water are distributed, how to separate gas and water is an important research and application topic. Using seismic data to identify oil, gas and water distribution is a long-term exploration topic in seismic exploration. [0003] P-wave seismic prospecting is a mature technology in seismic prospecting, while the corresponding multi-wave prospecting technology is in the exploration stage. In the identification of oil, gas and water using seismic data, the pre...

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Application Information

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IPC IPC(8): G01V1/28G01V1/40
Inventor 吴大奎戴勇徐明华彭宇胡晓新郑淑芬
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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