Pump-Off Pressure Compression for Real-Time Formation Integrity Tests
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Solution Overview
Problem
Current methods for formation integrity testing in oil and gas drilling face delays due to the high volume of annular pressure data, which can lead to incomplete or inaccurate results, as the transmission of large datasets disrupts drilling operations and introduces telemetry noise.
Innovation Solution
A method for transmitting a compressed pump-off pressure profile using a compression protocol that filters, decimates, and differentially codes the data, allowing for real-time transmission of key pressure points and enabling reconstruction of the pressure curve even if parts of the data are missing or corrupted, utilizing multiple on-demand frames for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high volume annular pressure data is transmitted in real-time, then measurement precision is improved, but transmission time increases and drilling operations are disrupted
Solution Approach 1:
The patent extracts and transmits only the critical portions of annular pressure data that are essential for formation integrity testing, rather than transmitting the complete high-volume dataset. This selective extraction maintains measurement precision for the most important parameters while significantly reducing transmission time and minimizing disruption to drilling operations.
Solution Approach 2:
The patent segments the continuous annular pressure data into discrete, manageable portions for transmission. By dividing the data stream into segments and prioritizing which segments to transmit first, the system achieves efficient data transfer that balances measurement precision requirements with operational time constraints.
2Reliability
If complete annular pressure data is transmitted, then reliability of formation integrity testing is improved, but telemetry noise increases and drilling operations are disrupted
Solution Approach 1:
The patent removes unnecessary data elements from the transmission stream, keeping only the critical annular pressure information needed for reliable formation integrity testing. This extraction process reduces telemetry noise while preserving the reliability of the essential measurements.
3Measurement precision
If high volume data is transmitted, then measurement precision is improved, but ease of operation deteriorates due to operational disruptions
Solution Approach 1:
The patent extracts only the essential pressure data needed for formation integrity testing, eliminating the need to transmit complete high-volume datasets. This approach maintains measurement precision for critical parameters while improving ease of operation by reducing disruptions to ongoing drilling activities.
Solution Approach 2:
The patent implements periodic transmission of critical pressure data at strategically selected intervals, rather than continuous transmission of all data. This periodic action maintains adequate measurement precision while significantly improving operational ease by minimizing interruptions to drilling operations.
Data Source
AI summary
Aspects of the disclosure can relate to a process for transmitting a pump-off pressure profile for formation integrity testing within a limited bandwidth. For example, a process may include measuring pump-off pressure data. The pump-off pressure data represents the pump-off pressure profile. The method also includes determining, from the pump-off pressure data, a pump-off pressure data portion corresponding to a formation integrity testing characteristic. The method also includes compressing pump-off pressure data portion with a compression protocol to produce compression bits. The compression bits representing the pump-off pressure data portion corresponding to the formation integrity testing characteristic. The method also includes transmitting, via a communication module, the compression bits to a computing device.