Steam quality and flow rate measurement
First Claim
1. A method for determining both the quality and quantity of steam containing both vapor and liquid being injected into a hydrocarbon bearing formation in a thermal recovery process, said method comprising:
- positioning a bladed rotating member attached to a motor/generator combination downhole adjacent the hydrocarbon formation;
measuring the voltage generated by the rotation of the rotating member;
positioning a network of bristles across the borehole to contact the wall of the borehole and intercept substantially all of the liquid flowing along the borehole wall;
measuring the total drag force due to liquid and vapor flow as said bristles are lowered into the borehole;
measuring the total drag force due to liquid and vapor flow as said bristles are withdrawn from the borehole;
determining the vapor flow rate by comparing the measured voltage with predetermined voltage versus vapor flow rate for the rotating member motor/generator combination; and
determining the quantity of liquid flowing along the wall of the borehole by utilizing the measured drag forces and predetermined drag force versus vapor flow rate and liquid flow rate measurements.
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Accused Products
Abstract
A method and apparatus for measuring both the quality and flow rate of steam injected into a hydrocarbon formation in a thermal recovery process. The method measures both the quantity of water and the flow rate of the steam. Both measurements can be made at any location in the borehole to determine the quality and quantity of steam injected into a particular formation. The apparatus utilizes a propeller motor/generator combination to determine the vapor flow rate; the drag produced by a network of bristles extending across the borehole determines the vapor flow rate and the quantity of liquid present.
26 Citations
17 Claims
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1. A method for determining both the quality and quantity of steam containing both vapor and liquid being injected into a hydrocarbon bearing formation in a thermal recovery process, said method comprising:
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positioning a bladed rotating member attached to a motor/generator combination downhole adjacent the hydrocarbon formation; measuring the voltage generated by the rotation of the rotating member; positioning a network of bristles across the borehole to contact the wall of the borehole and intercept substantially all of the liquid flowing along the borehole wall; measuring the total drag force due to liquid and vapor flow as said bristles are lowered into the borehole; measuring the total drag force due to liquid and vapor flow as said bristles are withdrawn from the borehole; determining the vapor flow rate by comparing the measured voltage with predetermined voltage versus vapor flow rate for the rotating member motor/generator combination; and determining the quantity of liquid flowing along the wall of the borehole by utilizing the measured drag forces and predetermined drag force versus vapor flow rate and liquid flow rate measurements. - View Dependent Claims (2, 3, 4)
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5. An apparatus for measuring both the quality and quantity of steam containing both liquid and vapor being injected into a hydrocarbon formation penetrated by a borehole, said apparatus comprising:
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an elongated housing adapted for lowering into and removal from the borehole, said housing being formed of at least two separate elongated sections disposed in an end-to-end relationship to form the elongated housing; a resilient member, the opposite ends of said resilient member being operably connected to the adjacent ends of said separate sections of said housing to permit limited movement between said separate sections along the longitudinal axis of the housing; a network of bristles, said bristles being mounted on the lowermost portion of said elongated sections when said housing is disposed in the borehole; flow measuring means, said flow measuring means being mounted on the lower end of said lower section of said elongated housing to measure the vapor flow through the borehole; and strain measuring means, said strain measuring means being operably disposed to measure the tension between said separate sections as said elongated housing is moved through the borehole. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification