Micro Seismic Fracture Parameter Correction via Volume Coefficients

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Solution Overview

Problem

Current micro seismic monitoring technologies distort fracture parameters due to noise, leading to inaccurate interpretation of fracture morphology and ineffective evaluation of fracturing effects in hydraulic fracturing, lacking reference value for fracture morphology and fracturing efficiency.

Innovation Solution

A correction method for micro seismic interpretation of fracturing fracture parameters, which classifies communication modes of fractured wells based on the matching degree between micro seismic monitoring results and sand adding amount, using volume correction coefficients to correct fracture parameters, and applies principal component analysis to classify and correct fracture lengths and heights.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If micro seismic monitoring is used to interpret fracture parameters, then fracture position indication and propagation analysis are enabled, but the fracture parameters become distorted due to noise influence

Engineering Contradiction:

Improvefracture parameter accuracyVSAvoidnoise influence

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary correction system that mediates between the noisy micro seismic monitoring data and the final fracture parameter interpretation. The correction method uses multiple data sources (micro seismic events, pressure transient data, flow rate data) as intermediaries to validate and correct the fracture parameters, thereby reducing the direct impact of noise on the final results.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements a feedback mechanism where the interpreted fracture parameters are continuously validated against multiple independent data sources. The correction method uses feedback loops to compare micro seismic interpretation results with pressure transient responses and flow rate measurements, then adjusts the parameters accordingly to eliminate distortions caused by noise.

Inventive Principle:

Principle #23Feedback

2Reliability

If traditional micro seismic interpretation methods are used, then fracture monitoring is achieved, but the interpretation results lack reference value for field fracturing evaluation

Engineering Contradiction:

Improveinterpretation reference valueVSAvoidfracture morphology correspondence

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent merges multiple data sources and interpretation methods into a unified correction framework. It combines micro seismic event data with pressure transient data, flow rate data, and fracture initiation efficiency models to create a comprehensive correction method that restores the reference value of interpretation results for field fracturing evaluation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The correction method developed in the patent is designed to be universally applicable to different fracturing scenarios. It can correct fracture parameters for various fracture types (single fracture, multiple fractures, intersecting fractures) and can be applied to different evaluation purposes (fracture morphology, fracturing effect, production prediction), making it a multi-functional tool.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If micro seismic monitoring data is used directly, then fracture position can be indicated, but the fracture morphology does not correspond with field fracturing parameters

Engineering Contradiction:

Improvefracture position accuracyVSAvoidfracture morphology-field parameter correspondence

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by introducing correction factors that adjust the fracture parameters based on the relationship between micro seismic data and field fracturing parameters. The correction method modifies the interpreted fracture morphology parameters (length, height, orientation) to establish correspondence with actual field parameters such as sand adding amount and fluid amount.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12140719B2Correction method for micro seismic interpretation fracturing fracture parameter result

Publication Date: 2024.11.12 CHINA UNIV OF PETROLEUM (BEIJING)

AI summary

A correction method for a microseism interpretation fracturing fracture parameter result. The method includes classifying the communication modes of a block sampling fractured wells to be corrected according to the matching degree of micro seismic monitoring result and sand adding amount; correcting the volume coefficient of each said classified fractured well single well, and the volume correction coefficient Bv of each said fractured well is:Bv=[L5/4⁢H]T[L5/4⁢H]W,wherein, [L5/4H]W is a calculation value of a micro seismic monitoring interpretation result; [L5/4H]T is a theoretical calculation value obtained by using field construction parameters; C, calculating the classification volume correction coefficient of each class of fractured wells according to the calculated single well volume correction coefficient of each said fractured well. The micro seismic interpretation result can be corrected in combination with the field construction parameters, so that the micro seismic monitoring data can be utilized to truly interpret the effective fracture morphology after fracturing.