Converted Wave Acquisition via Zoeppritz Derivative

Solution Overview

Problem

Current seismic exploration methods, primarily relying on P-wave technology, are costly and lack comprehensive data, limiting the accuracy and efficiency of oil and gas resource exploration, while multi-wave and multi-component technologies face high acquisition costs and low signal-to-noise ratios, hindering the effective utilization of converted wave seismic data.

Innovation Solution

A method involving the use of the Zoeppritz equation to acquire converted wave information by simplifying relational expressions between P-wave reflection coefficients and incident angles, calculating derivatives, and correcting parameters to obtain converted wave data, which can be implemented using an electronic device with a processor and memory, thereby reducing exploration costs and improving data accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If multi-wave and multi-component technology is used to acquire converted wave seismic data, then the comprehensiveness of exploration data is improved, but the acquisition cost increases and signal-to-noise ratio decreases

Engineering Contradiction:

Improvecomprehensiveness of exploration dataVSAvoidacquisition cost

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent creates a converted wave seismic data set by mathematically transforming existing P-wave seismic data using the Zoeppritz equation. Instead of directly acquiring expensive multi-component data, the method copies and transforms available P-wave data into converted wave information, achieving comprehensive exploration data at lower cost.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent transforms P-wave seismic data parameters into converted wave parameters through mathematical operations. By applying derivatives and parameter corrections to the Zoeppritz equation, the method converts existing P-wave data into converted wave data with different physical characteristics, enabling comprehensive analysis without additional field acquisition costs.

Inventive Principle:

Principle #35Parameter changes

2Loss of information

If multi-wave and multi-component technology is used to acquire converted wave seismic data, then the comprehensiveness of exploration data is improved, but the signal-to-noise ratio decreases

Engineering Contradiction:

Improvecomprehensiveness of exploration dataVSAvoidsignal-to-noise ratio

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The patent creates a converted wave seismic data set by mathematically transforming existing P-wave seismic data using the Zoeppritz equation. Instead of directly acquiring expensive multi-component data, the method copies and transforms available P-wave data into converted wave information, achieving comprehensive exploration data at lower cost.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent uses a mathematical transformation model (Zoeppritz equation) that is computationally efficient and can be applied to existing P-wave data. This 'cheap' computational approach produces converted wave data with sufficient quality for exploration purposes, avoiding the need for expensive and complex multi-component field acquisition that suffers from low signal-to-noise ratios.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Quantity of substance

If P-wave exploration technology is used, then the exploration cost is reduced, but the comprehensiveness of seismic wave field data decreases

Engineering Contradiction:

Improveexploration costVSAvoidcomprehensiveness of seismic wave field data

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

The patent makes P-wave seismic data serve multiple functions by transforming it into converted wave data. The same P-wave data can be used for both traditional P-wave analysis and converted wave analysis, maximizing the utility of existing data and providing comprehensive exploration information without additional field acquisition costs.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent transforms P-wave seismic data parameters into converted wave parameters through mathematical operations. By applying derivatives and parameter corrections to the Zoeppritz equation, the method converts existing P-wave data into converted wave data with different physical characteristics, enabling comprehensive analysis without additional field acquisition costs.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11402530B2Method for acquiring converted wave, electronic device and readable storage medium

Publication Date: 2022.08.02 PETROCHINA CO LTD

AI summary

The embodiments of the present application disclose a method for acquiring a converted wave, an electronic device, and a readable storage medium, wherein the method for acquiring a converted wave comprises: acquiring a relational expression between a P-wave reflection coefficient and an incident angle by Zoeppritz equation; simplifying the relational expression between the P-wave reflection coefficient and the incident angle; calculating a derivative for the simplified relational expression between the P-wave reflection coefficient and the incident angle, to obtain an expression of a wave to be converted; correcting parameters in the expression of the wave to be converted to obtain a converted wave.