Reservoir Modeling via Vertical-Horizontal Data Correlation
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Solution Overview
Problem
Traditional systems for describing reservoirs in the horizontal direction have limited detail due to an effective radius of less than a foot, failing to provide comprehensive descriptions of reservoirs beyond the wellbore instrument range.
Innovation Solution
A method and system that correlate vertical formation data with near-wellbore horizontal formation data to create horizontally adjusted formation data, allowing for detailed reservoir descriptions beyond the wellbore instrument range, including the use of seismic data, mud log data, and other logging data to define formation members and calculate reservoir properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wellbore instrument logs are used in horizontal wellbores, then the system can provide reservoir description data, but the effective radius is limited to less than a foot which does not provide many details of the reservoir
Solution Approach 1:
The patent combines vertical wellbore instrument logs with horizontal wellbore instrument logs and integrates them with seismic data to create a comprehensive reservoir description system. This merging of multiple data sources allows the system to overcome the limited effective radius of individual tools by correlating vertical formation data with near-wellbore horizontal formation data, thereby providing detailed reservoir descriptions beyond what any single tool could achieve alone.
2Loss of information
If wellbore instrument range is extended to cover wider reservoirs, then more reservoir details can be obtained, but the system complexity and data integration requirements increase
Solution Approach 1:
The patent uses seismic data as an intermediary to bridge the gap between vertical and horizontal wellbore instrument logs. The seismic data provides a regional framework that helps correlate and integrate the localized wellbore data from both vertical and horizontal directions. This intermediary approach allows the system to manage complexity by using seismic data as a mediating layer that connects different data sources without requiring direct integration of all components.
3Length of stationary object
If vertical formation data is correlated with near-wellbore horizontal formation data, then reservoir properties can be described beyond instrument range, but the processing and computation requirements increase
Solution Approach 1:
The patent performs preliminary correlation and alignment of vertical and horizontal formation data before detailed reservoir property calculations. By pre-processing the data to establish formation relationships and geometries in advance, the system reduces the computational burden during the actual reservoir modeling phase. This preliminary action allows the system to extend reservoir description range while managing computational power requirements through staged processing.
Data Source
AI summary
A method for modeling a reservoir includes receiving vertical formation data describing geological formations in a vertical direction as a function of vertical depth, receiving near-wellbore horizontal formation data describing the geological formations in a horizontal or deviated direction near a wellbore up to a wellbore instrument range, and correlating the vertical formation data with the near-wellbore horizontal formation data to create horizontally adjusted formation data to describe the geological formations in the vertical direction beyond the wellbore instrument range, along the horizontal or deviated direction.