Hookload-Based Fluid Characterization in Subterranean Formations
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Solution Overview
Problem
Conventional methods for detecting fluid loss during subterranean operations are ineffective as they only provide post-operation data, failing to allow real-time adjustments and do not identify the specific fluid lost, leading to incomplete treatments, increased costs, and potential formation damage.
Innovation Solution
A system and method that utilize buoyancy calculations based on hookload measurements and fluid density to detect fluid migration in real-time, allowing for the identification of fluid loss and composition changes in the well bore, enabling early detection and correction of fluid loss issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods of detecting fluid loss are used, then the operation can be completed, but fluid loss is not detected in real-time and cannot be compensated
Solution Approach 1:
The system continuously monitors hookload during the operation and compares actual values against expected values to provide real-time feedback on fluid loss. This enables immediate detection and response to fluid loss conditions, transforming the conventional post-operation detection approach into a real-time monitoring system that can trigger compensatory actions during the operation itself.
Solution Approach 2:
The patent replaces conventional mechanical fluid volume measurement methods with a buoyancy-based hookload monitoring system. By measuring the change in hookload (which reflects buoyancy forces from fluid presence) rather than directly measuring fluid volume, the system achieves real-time detection of fluid loss without requiring complex downhole measurement equipment.
2Loss of information
If conventional fluid loss detection methods are used, then the operation can proceed, but the specific fluid lost cannot be identified
Solution Approach 1:
The system monitors changes in hookload parameters (weight, buoyancy) to identify fluid loss. By analyzing the magnitude and rate of hookload change, the system can infer information about the lost fluid (e.g., drilling fluid vs. formation fluid) without requiring complex compositional analysis equipment, thus obtaining fluid identity information through parameter-based inference rather than direct measurement.
3Reliability
If treatment operations are repeated to compensate for fluid loss, then fluid loss can be corrected, but operational efficiency decreases
Solution Approach 1:
The system detects fluid loss early in the operation and provides real-time alerts, enabling operators to take preliminary corrective actions before the fluid loss becomes severe or causes formation damage. This preliminary detection and response prevents the need for repeated treatment operations, thereby maintaining operational efficiency while ensuring treatment effectiveness.
4Object-affected harmful factors
If fluid loss is not detected early, then operations can complete, but formation damage and environmental contamination occur
Solution Approach 1:
The continuous hookload monitoring system provides real-time feedback on fluid loss conditions, enabling operators to intervene immediately when fluid loss is detected. This early intervention prevents the fluid loss from progressing to levels that would cause formation damage or environmental contamination, eliminating the harmful effects before they occur rather than responding after damage has happened.
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
Enables early detection and characterization of fluid loss, reducing the need for repeated operations, facilitating efficient remedial actions, and allowing for precise identification of lost fluids to prevent formation damage and environmental contamination.
Implementation Method 1
determining an actual buoyed hookload of an apparatus at least partially disposed in a well bore
Data Source
AI summary
Systems and methods for monitoring and characterizing fluids in a subterranean formation are provided. In one embodiment, a method for monitoring fluids in a well bore penetrating a subterranean formation is provided, the method comprising: determining an actual buoyed hookload of an apparatus at least partially disposed in the well bore wherein a first set of fluids are present therein; comparing the actual buoyed hookload to a calculated buoyed hookload of the apparatus, wherein the calculated buoyed hookload is based in part on the unbuoyed hookload of the apparatus, and the properties of a second set of fluids that are assumed to be present in the well bore; and determining at least one property of the first set of fluids based in part on the comparison of the actual buoyed hookload to the calculated buoyed hookload.