Combined surface and wellbore electromagnetic measurement system and method for determining formation fluid properties
AssigneeKJT Enterprises, Inc.
InventorKurt M. Strack
Life of this patent
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Abstract
A method is disclosed for monitoring a reservoir. The method includes making a first set of electromagnetic measurements at locations along the Earth's surface, making a first measurement from at least one sensor disposed proximate the reservoir in a wellbore and determining an initial Earth model from the first electromagnetic and first sensor measurements. The initial Earth model include a fluid contact. At selected times, the sensor and electromagnetic measurements are repeated and a spatial distribution of the fluid contact is determined from the repeated measurements.
Claims47
A method for monitoring a reservoir, comprising:
- making a first set of electromagnetic measurements at locations along the Earth's surface;
- making a first measurement from at least one sensor disposed proximate e reservoir in a wellbore;
- determining an initial Earth model from the first electromagnetic and first sensor measurements, the initial Earth model including spatial distribution of a fluid contact;
- repeating the sensor measurements and electromagnetic measurements at selected times;
- and
- repeating determining the spatial distribution of the fluid contact from the repeated measurements.
A method for monitoring a reservoir, comprising:
- making a first set of galvanic measurements at locations along the Earth's surface;
- making a first measurement from at least one sensor disposed proximate the reservoir in a wellbore;
- determining an initial Earth model from the first galvanic and first sensor measurements, the initial Earth model including a spatial distribution of a fluid contact;
- repeating the sensor measurements and galvanic measurements at selected times;
- and
- repeating determining the spatial distribution of the fluid contact from the repeated measurements.
The method as defined in claim 19 wherein the at least one sensor has a response at least partially affected by a fluid content of the reservoir.
The method as defined in claim 20 wherein the at least one sensor comprises a resistivity sensor.
A system for mapping structures within the Earth, comprising:
- a plurality of electromagnetic sensors disposed in a selected pattern on the Earth's surface;
- at least one sensor disposed in a wellbore drilled proximate a subsurface structure to be mapped;
- and
- means for mapping the subsurface structure from measurements made by the electromagnetic sensors and the at least one sensor, the means for mapping comprising means for determine a spatial distribution of a fluid contact within the Earth.
Dependencies are inferred from the claim text.