Integrated Logging Tool for Unconventional Formation Evaluation
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Solution Overview
Problem
Evaluating unconventional hydrocarbon formations is challenging due to their low permeability and variability in organic content, mineralogy, and rock mechanical properties, making it difficult to identify optimal well placement and achieve economic production rates, especially with conventional well logging methods being operationally problematic and costly.
Innovation Solution
An integrated logging tool with a spectral gamma ray sensor, acoustic measurements, and high-resolution imaging for determining total organic carbon, mechanical properties, and fracture identification, deployed in a wellbore to gather data for geosteering and formation parameter evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional wireline logging tools are used to evaluate unconventional formations, then formation parameters can be measured, but the operation becomes problematic and costly with reduced productivity
Solution Approach 1:
The patent combines multiple logging tools (gamma ray sensor, acoustic sensor, imaging device) into a single integrated downhole tool that can be deployed with the drilling assembly. This merging eliminates the need for separate wireline logging operations, thereby improving productivity while maintaining measurement precision through the coordinated operation of multiple sensors.
Solution Approach 2:
The integrated logging tool enables measurements to be taken during the drilling process itself, before the well completion phase. By performing formation evaluation preliminarily during drilling, the system identifies sweet spots and optimizes well placement in real-time, avoiding the need for subsequent separate logging operations.
2Loss of information
If multiple separate logging operations are performed to evaluate unconventional formations, then comprehensive formation data can be collected, but operational complexity and costs increase
Solution Approach 1:
The patent integrates gamma ray sensing, acoustic measurement, and imaging capabilities into a single downhole tool. This consolidation collects comprehensive formation data (organic content, porosity, mechanical properties, fracture information) through one deployment, reducing operational complexity while maintaining data completeness.
Solution Approach 2:
The integrated logging tool performs multiple functions simultaneously: gamma ray spectroscopy for organic content and mineralogy, acoustic measurements for porosity and mechanical properties, and imaging for fracture detection. This multi-functionality eliminates the need for multiple specialized logging operations.
3Productivity
If horizontal drilling is used to increase well surface area for economic production in low permeability formations, then production rates improve, but the complexity of well placement and evaluation increases
Solution Approach 1:
The integrated logging tool provides real-time feedback during drilling by continuously measuring formation parameters (gamma ray signatures, acoustic properties, imaging data). This feedback enables geosteering operations where the well path is dynamically adjusted to optimize placement in productive zones, simplifying the complexity of horizontal well placement through active monitoring and adjustment.
Solution Approach 2:
By performing formation evaluation during the drilling process itself, the system identifies optimal well placement zones and sweet spots before the well is completed. This preliminary evaluation guides horizontal well trajectory design and reduces the complexity of subsequent well placement decisions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integrated logging tool effectively determines key formation parameters, enabling precise geosteering and improving well placement efficiency, reducing operational risks and costs associated with unconventional hydrocarbon extraction.
Implementation Method 1
The integrated logging tool includes a gamma ray sensor... determining total gamma ray
Data Source
AI summary
An integrated logging tool includes an outer housing and an insert, the insert positioned within the outer housing. The integrated logging tool further includes a gamma sensor within the insert.