Atomic Optical Clocks for Gravitational Surveying
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Solution Overview
Problem
Current gravitational surveying methods lack the precision to accurately estimate the mass and depth of subsurface anomalies, such as hydrocarbon reservoirs and geological formations, without extensive drilling or complex data processing.
Innovation Solution
A system utilizing frequency standards, including atomic and optical clocks, to measure frequency shifts caused by gravitational potential, combined with gravimeters to derive relationships between mass and depth of anomalies, allowing for precise estimation without the need for extensive subsurface measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gravitational surveying methods are used, then survey coverage can be achieved, but measurement precision is insufficient to accurately estimate mass and depth of subsurface anomalies
Solution Approach 1:
The patent replaces conventional mechanical gravitational surveying instruments with atomic optical clocks that measure gravitational potential through frequency shifts. This substitution of measurement principle enables precise estimation of anomaly mass and depth by exploiting the relationship between gravitational potential and clock frequency, achieving higher measurement precision without proportionally increasing device complexity
Solution Approach 2:
The patent changes the measurement parameter from gravitational acceleration (conventional gravimetry) to gravitational potential (via frequency shift measurements). This parameter transformation allows direct estimation of the relationship between anomaly mass and depth, resolving the precision limitation of traditional methods while maintaining manageable system complexity through well-established atomic clock technology
2Measurement precision
If extensive drilling or complex data processing is performed to improve accuracy, then measurement precision increases, but loss of time and productivity decrease
Solution Approach 1:
The patent extracts the essential information needed for anomaly characterization directly from gravitational potential measurements, eliminating the need for extensive drilling operations. By measuring gravitational potential at multiple locations and processing this data through the described methodology, the system obtains accurate mass and depth estimates without time-consuming subsurface intervention
Solution Approach 2:
The patent performs preliminary gravitational potential surveys using atomic optical clocks to characterize subsurface anomalies before committing to expensive and time-consuming drilling operations. This preliminary action provides sufficient accuracy for exploration decisions, improving productivity by avoiding unnecessary follow-up operations
3Area of stationary object
If conventional gravimetric surveys are conducted, then large-scale coverage is achieved, but measurement precision remains insufficient for detailed anomaly analysis
Solution Approach 1:
The patent makes the atomic optical clock system universal by applying it across multiple survey locations to achieve both large-scale coverage and high measurement precision. The same frequency-standard-based measurement technique used for detailed local analysis can be deployed across extensive areas, simultaneously achieving broad coverage and detailed anomaly characterization
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 accurate two- and three-dimensional mapping of gravitational anomalies, distinguishing between different types of anomalies and improving survey accuracy without the need for drilling, by correlating frequency shifts with gravitational acceleration measurements.
Implementation Method 1
estimating a frequency shift of a frequency standard due to a gravitational potential at at least one measurement location
Data Source
AI summary
A method of estimating a parameter of an anomaly in an earth formation includes: disposing a measurement device at at least one measurement location, the measurement device including a frequency standard; estimating a frequency shift of a frequency standard due to a gravitational potential at at least one measurement location; and deriving a relationship between a mass and a depth of a formation anomaly at a distance to the at least one measurement location using the frequency shift.