Induction Logging Tool Temperature Correction Device
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Solution Overview
Problem
Induction logging tools face challenges in high-precision temperature correction and accurately simulating deep stratum environments, leading to measurement errors due to temperature drift and differences in conductivity between shallow and deep stratum conditions.
Innovation Solution
A device comprising a box body with thermal insulation, a circulating fan, electric heater, temperature controller, and deep stratum environmental simulation system, which includes a wellbore hole simulator and stratum core simulation module, to maintain uniform temperature and simulate complex lithological and fluid conditions, enhancing measurement precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-temperature experiment method with data processing compensation is used, then temperature effect elimination is achieved, but measurement precision and reliability are insufficient due to lack of high-precision temperature correction device
Solution Approach 1:
The patent implements preliminary temperature calibration by pre-establishing the quantitative relationship between temperature and temperature effect through pre-temperature experiments. The system performs temperature correction calibration before actual logging operations, storing calibration data for subsequent compensation during field use. This preliminary action ensures high-precision temperature correction by preparing correction parameters in advance under controlled conditions.
2Ease of manufacture
If shallow stratum environment simulation is used, then testing can be performed at normal temperature, but measurement accuracy is insufficient due to inability to replicate deep high-temperature stratum environment
Solution Approach 1:
The patent fundamentally changes the temperature parameter of the simulation environment, enabling the simulation system to operate at high temperatures (up to 200°C or higher) to replicate deep stratum conditions. The system includes temperature control mechanisms that can maintain stable high-temperature environments, allowing accurate measurement of conductivity characteristics under conditions that match actual deep drilling operations, thereby eliminating the temperature parameter mismatch between shallow simulation and deep application.
3Ease of operation
If conventional laboratory simulation method is used, then testing is feasible at normal conditions, but understanding of deep high-temperature environment impact is insufficient
Solution Approach 1:
The patent creates a multi-functional simulation system that can simultaneously replicate multiple deep stratum environment parameters including high temperature, high pressure, and complex lithology conditions. The system is designed to accommodate various types of logging tools and perform multiple types of tests under unified deep environment simulation conditions, enabling comprehensive evaluation of tool performance without losing critical deep stratum environment characteristics.
4Ease of manufacture
If test instruments used in laboratories are used, then testing can be performed, but measurement errors occur due to significant difference from actual deep high temperature environment and complex lithology environment
Solution Approach 1:
The patent creates a realistic copy of the deep stratum environment by constructing a simulation system that replicates the physical and chemical conditions of deep underground formations. The system includes components that copy lithological characteristics, fluid properties, temperature gradients, and pressure conditions of actual deep strata. This high-fidelity environmental copying allows laboratory testing to produce results that accurately reflect field performance, eliminating measurement errors caused by environment mismatch.
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 device provides high-precision temperature correction and accurate simulation of deep stratum environments, reducing measurement errors and ensuring consistent test conditions, thereby improving the accuracy of induction logging tool measurements.
Implementation Method 1
an electric heater, disposed at an air inlet of the circulating fan for heating air
Implementation Method 2
a circulating fan, wherein an air outlet of the circulating fan is connected to the air channel for making the heated air enter the air channel
Implementation Method 3
the alternating current in the transmitting coil antenna generates a varying magnetic field. The varying magnetic field induces to generate eddy current in the stratum surrounding the well
Implementation Method 4
an electromotive force is induced in a receiving coil. The magnitude of the induced electromotive force is related to the eddy current, that is, to the conductivity of the stratum
Data Source
AI summary
The present invention discloses a device for performing temperature correction on an induction logging tool and deep stratum environmental simulation, including: a box body, configured to accommodate the induction logging tool and a deep stratum environmental simulation system; an air channel, configured to make heated air fill the box body; a circulating fan, configured to make the heated air enter the air channel; an electric heater, configured to heat air; a temperature controller, configured to control power of the electric heater; the deep stratum environmental simulation system, configured to simulate lithological and fluid situations in different stratum environments; a data collection system, configured to collect, store, process, and display a signal in real time; and a control unit, configured to control operation of the entire device. The device for performing temperature correction on an induction logging tool and deep stratum environmental simulation provided in the embodiments of the present invention can accurately simulate a complex environment of a deep stratum, thereby increasing measurement precision.