Stratigraphic Correlation From Lateral Wells for Deposit Targeting
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Solution Overview
Problem
Conventional hydrocarbon exploration methods struggle to accurately target hydrocarbon deposits in unconventional sources like shale rocks and tight rock formations, as they are complex and expensive, necessitating improved stratigraphic methods for easier and more precise targeting.
Innovation Solution
A method for determining stratigraphic correlations between sets of stratigraphic measurements from different lateral wells using corrected depth parameters and graphic correlation techniques, enabling the construction of a stratigraphic composite profile and sedimentary depositional model to predict hydrocarbon deposit locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional hydrocarbon exploration methods are used to target hydrocarbon deposits in unconventional sources, then the exploration can be conducted with existing technology, but the accuracy of targeting and extraction efficiency deteriorate
Solution Approach 1:
The method segments the exploration process into distinct analytical components: obtaining stratigraphic measurements from multiple wells, correcting depth parameters for structural variations, identifying stratigraphic correlations between wells, and constructing composite profiles. This segmentation allows each component to be optimized independently, improving targeting accuracy without overwhelming complexity.
Solution Approach 2:
The patent introduces stratigraphic correlations and composite profiles as intermediary elements that connect individual well measurements to regional hydrocarbon deposit predictions. These intermediaries synthesize data from multiple sources, enabling accurate targeting without requiring direct complex imaging or analysis of each potential deposit location.
2Productivity
If conventional exploration methods are used, then existing equipment and procedures can be utilized, but the efficiency and cost-effectiveness of extracting hydrocarbons from unconventional sources deteriorate
Solution Approach 1:
The method performs preliminary stratigraphic analysis and correlation work before actual drilling and extraction operations. By constructing composite profiles and identifying correlations in advance, the exploration phase prepares detailed guidance information that streamlines subsequent extraction operations, improving overall productivity without adding complexity to the extraction process itself.
Solution Approach 2:
The patent transforms raw stratigraphic measurements into corrected depth parameters and correlated stratigraphic frameworks. This parameter transformation converts unprocessed well data into actionable intelligence that directly guides extraction operations, enhancing efficiency while using standard geological analysis techniques that are relatively easy to implement.
3Measurement precision
If stratigraphic measurements are obtained from multiple wells without correction, then data collection is simpler, but the accuracy of stratigraphic correlation and deposit prediction deteriorates
Solution Approach 1:
The method extracts and removes the effect of structural variations (such as folding and faulting) from the depth parameters through correction procedures. By taking out these confounding factors, the underlying stratigraphic correlations become apparent, improving measurement precision without requiring overly complex analysis of the structural distortions themselves.
Data Source
AI summary
A method comprises determining stratigraphic correlations between two or more sets of stratigraphic measurements. Each set of stratigraphic measurements is obtained from a different lateral well in a region.