3D Well Log Grid for Seismic Data Integration
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Solution Overview
Problem
Existing methods for converting non-seismic data into seismic data domain, such as digital well-log data, face issues due to the discontinuous nature of wellbore data, leading to loss of connection between wellbore location and trace location, and are limited to regional analysis only.
Innovation Solution
A process to create a continuous three-dimensional array of wellbore data, represented in a formatted dataset that can be manipulated in standard 3D-seismic interpretation and visualization software, involving the creation of a 2D or 3D well grid by assigning wells to grid nodes, populating non-well nodes with stratigraphic correlations, and converting the data into seismic formats like SEG-Y for interpretation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital well-log data is converted into seismic data domain using previous methods, then the data can be loaded into seismic workstations, but the discontinuous nature of wellbore data causes loss of connection between wellbore location and trace location
Solution Approach 1:
The patent introduces a 3D grid as an intermediary structure that mediates between the discrete wellbore data points and the continuous seismic data domain. Each grid node serves as a mediator that receives wellbore data at specific locations and distributes it to multiple seismic traces, thereby maintaining the connection between wellbore location and trace location while enabling compatibility with seismic software.
Solution Approach 2:
The patent transitions from 1D wellbore data (depth profiles) to a 3D grid structure by adding spatial dimensions (x, y, z coordinates). This dimensional transformation allows the discrete wellbore measurements to be distributed across a continuous 3D space, resolving the contradiction between data continuity and location tracking.
2Adaptability or versatility
If wellbore data is converted to seismic format for regional analysis, then the data can be visualized and interpreted, but the method is limited to regional analysis only and cannot provide well-specific details
Solution Approach 1:
The patent applies local quality by assigning different levels of detail to different regions of the 3D grid. Grid nodes near wellbore locations receive high-resolution wellbore data, while nodes farther away receive interpolated or regional data. This allows the same 3D structure to provide both regional overview and well-specific precision where needed.
Solution Approach 2:
The patent segments the 3D grid into multiple zones or blocks, with each segment associated with specific wellbore data. This segmentation allows the data to be processed and interpreted at different resolutions: regionally at the block level and precisely at the well level within specific segments.
3Measurement precision
If a 3D grid is created with fine spacing to maintain well location accuracy, then location precision is improved, but the data volume and processing complexity increase significantly
Solution Approach 1:
The patent applies partial action by creating a 3D grid with appropriate (not necessarily fine) spacing that is sufficient for the analysis requirements. Rather than using uniformly fine spacing throughout, the grid spacing can be adjusted based on the distribution of wellbore data and the specific analytical needs, reducing overall complexity while maintaining necessary precision.
Data Source
AI summary
In an embodiment, creation of a continuous three dimensional array of data from digital information obtained from a wellbore, and representation in a seismic data formatted dataset. In an embodiment, providing the capability to export stratigraphic interpretations made while working within the 3D-log data volume back to any wellbore that is encompassed within the areal extent of the 3D-log data volume. In one embodiment, a 2D well grid creation process comprises the steps of (a) selecting an initial grid spacing, (b) assigning wells from a dataset of well data to closest nodes in the grid, (c) if a plurality of wells are assigned to a single node after completing step (b), narrowing the grid spacing and repeating step (b) until no more than one well is assigned to any node. In an embodiment the non-well nodes are populated by extrapolating from adjacent single well nodes.