Method for detecting and correcting sensor failure in oil and gas production system
First Claim
Patent Images
1. A method for detecting sensor failure in an oil and gas production system, comprising performing in a data processing system:
- generating from a process model of the oil and gas production system using measurements from one or more sensors an expected value for a sensor measurement;
comparing the expected value with an actual measurement obtained from a first sensor in said oil and gas production system;
if the expected value is within acceptable specified limits of the actual measurement confirming the validity of the actual measurement obtained; and
if the expected value is not within acceptable specified limits of the actual measurement, indicating the failure of the sensor and replacing the value of the actual measurement with the expected value.
1 Assignment
0 Petitions
Accused Products
Abstract
Sensor failure in an oil and gas production system is monitored and detected by checking the consistency of the measurements of the sensor in question using a computer-based process model with the measurements of the other sensors in the system. The present invention also generates a back-up value for a failing sensor with the process model by identifying the value that is most consistent with the measurements of the other sensors in the system.
38 Citations
22 Claims
-
1. A method for detecting sensor failure in an oil and gas production system, comprising performing in a data processing system:
-
generating from a process model of the oil and gas production system using measurements from one or more sensors an expected value for a sensor measurement;
comparing the expected value with an actual measurement obtained from a first sensor in said oil and gas production system;
if the expected value is within acceptable specified limits of the actual measurement confirming the validity of the actual measurement obtained; and
if the expected value is not within acceptable specified limits of the actual measurement, indicating the failure of the sensor and replacing the value of the actual measurement with the expected value. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for detecting sensor failure in an oil and gas production system, comprising the steps performed in a data processing system:
-
generating an expected value for a sensor measurement from a process model of the oil and gas production system, by means of one (or more) generated back-up value(s), the back-up value(s) primarily being generated by means of the process model;
comparing the expected value with an actual measurement obtained from a first sensor in said oil and gas production system;
if the expected value is within acceptable specified limits of the actual measurement confirming the validity of the actual measurement obtained; and
if the expected value is not within acceptable specified limits of the actual measurement, indicating the failure of the sensor and replacing the value of the actual measurement with the expected value. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A computer program product for causing a data processing system to monitor for sensor failure in an oil and gas production system, the computer program product comprising:
-
a computer program storage device;
computer-readable instructions on the storage device for causing the data processing system to monitor for sensor failure in the oil and gas production system by performing;
generating from a process model of the oil and gas production system using measurements from one or more sensors an expected value for a sensor measurement;
comparing the expected value with an actual measurement obtained from a first sensor;
if the expected value is within acceptable specified limits of the actual measurement confirming the validity of the actual measurement obtained; and
if the expected value is not within acceptable specified limits of the actual measurement, indicating the failure of the sensor and replacing the value of the actual measurement with the expected value. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A computer program product for causing a data processing system to monitor for sensor failure in an oil and gas production system, the computer program product comprising:
-
a computer program storage device;
computer-readable instructions on the storage device for causing the data processing system to monitor for sensor failure in the oil and gas production system by;
generating an expected value for a sensor measurement from a process model of the oil and gas production system, by means of one (or more) generated back-up value(s), the back-up value(s) primarily being generated by means of the process model;
comparing the expected value with an actual measurement obtained from a sensor in said oil and gas production system;
if the expected value is within acceptable specified limits of the actual measurement confirming the validity of the actual measurement obtained; and
if the expected value is not within acceptable specified limits of the actual measurement, indicating the failure of the sensor and replacing the value of the actual measurement with the expected value. - View Dependent Claims (19, 20, 21, 22)
-
Specification