Mapping and monitoring of hydraulic fractures using vector magnetometers
First Claim
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1. A method for mapping and monitoring of hydraulic fracture, the method comprising:
- capturing, using an array of sensors, a first magnetic image of a well pay zone, the first magnetic image comprising a baseline magnetic profile including Earth'"'"'s magnetic field, and remnant sources of magnetism in the well pay zone, the first magnetic image comprising a first set of one of more vector measurements using the array of sensors;
injecting a fluid into a well bore;
capturing, using the array of sensors, a second magnetic image after the well bore is padded with the fluid, the second magnetic image comprising a second set of one of more vector measurements using the array of sensors;
establishing a background based on the first and the second magnetic images;
injecting a doped proppant into a stage of the well bore;
capturing, using the array of sensors, a third magnetic image after the doped proppant is injected into the stage, the third magnetic image comprising a third set of one of more vector measurements using the array of sensors; and
processing the third image to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage.
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Abstract
A method for mapping and monitoring of hydraulic fracture includes capturing, using an array of sensors, a first magnetic image of a well pay zone. A second magnetic image is captured using the array of sensors, after a well bore is padded with a fluid. A background is established based on the first and the second magnetic images. A third magnetic image is captured using the array of sensors, after a doped proppant is injected into a stage. The third image is processed to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage.
208 Citations
20 Claims
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1. A method for mapping and monitoring of hydraulic fracture, the method comprising:
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capturing, using an array of sensors, a first magnetic image of a well pay zone, the first magnetic image comprising a baseline magnetic profile including Earth'"'"'s magnetic field, and remnant sources of magnetism in the well pay zone, the first magnetic image comprising a first set of one of more vector measurements using the array of sensors; injecting a fluid into a well bore; capturing, using the array of sensors, a second magnetic image after the well bore is padded with the fluid, the second magnetic image comprising a second set of one of more vector measurements using the array of sensors; establishing a background based on the first and the second magnetic images; injecting a doped proppant into a stage of the well bore; capturing, using the array of sensors, a third magnetic image after the doped proppant is injected into the stage, the third magnetic image comprising a third set of one of more vector measurements using the array of sensors; and processing the third image to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for mapping and monitoring of hydraulic fracture, the system comprising:
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an array of sensors configured to capture magnetic images, wherein the magnetic images comprises a first magnetic image of a well pay zone, and a second magnetic image comprises a magnetic image captured after a well bore is padded with a fluid, the first magnetic image comprising a baseline magnetic profile including Earth'"'"'s magnetic field, and remnant sources of magnetism in the well pay zone, the first magnetic image comprising a first set of one of more vector measurements using the array of sensors, the second magnetic image comprising a second set of one of more vector measurements using the array of sensors; and a processor configured to provide a background image based on the first and the second magnetic images, wherein; a third magnetic image is captured by the array of sensors after a doped proppant is injected into a stage, the third magnetic image comprising a third set of one of more vector measurements using the array of sensors, and the processor is configured to process the third magnetic image to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method comprising:
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capturing a first image of a well pay zone, the first image comprising a baseline magnetic profile including Earth'"'"'s magnetic field, and remnant sources of magnetism in the well pay zone, the first magnetic image comprising a first set of one of more vector measurements; capturing a second image after a well bore is padded with a fluid, the second image comprising a second set of one of more vector measurements using the array of sensors; providing a background image based on the first and the second images; capturing a third image after a doped proppant is injected into a stage, the third image comprising a third set of one of more vector measurements using the array of sensors; and processing the third image to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage, wherein the first, second, and third images comprise magnetic images. - View Dependent Claims (20)
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Specification