Method of detecting fluid in-flows downhole
First Claim
1. A method of measuring fluid in-flow in a region of interest in a wellbore, comprising:
- a) deploying a fiber optic cable concurrently with placement of a downhole tubular;
b) transmitting a light signal along the cable and receiving a reflected signal from the region of interest; and
c) interpreting the received signal to obtain information about fluid flowing into or out of the wellbore in the region of interest;
wherein step c) comprises;
i) assessing amplitude and frequency spectra across an array of channels;
ii) conditioning the received signal by removing at least a portion of the signal that is not related to flow;
iii) assessing flow regimes across depths and times;
iv) calculating axial flow/s within the wellbore using relationships for axial flow; and
v) calculating flow into or out of the wellbore at one or more points using relationships for flow through an orifice.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of measuring fluid in-flow in a region of interest in a wellbore comprises deploying a fiber optic cable concurrently with placement of a downhole tubular, transmitting a light signal along the cable and receiving a reflected signal from the region of interest, and interpreting the received signal to obtain information about fluid flowing in the region of interest. The wellbore may include a horizontal portion. The received signal may also be interpreted by assessing amplitude and frequency spectra across array of channels, conditioning the received signal by removing at least a portion of the signal that is not related to flow, assessing flow regimes across depths and times, calculating axial flow/s within the wellbore using relationships for axial flow, and calculating flow into or out of the wellbore at one or more points using relationships for flow through an orifice.
66 Citations
8 Claims
-
1. A method of measuring fluid in-flow in a region of interest in a wellbore, comprising:
-
a) deploying a fiber optic cable concurrently with placement of a downhole tubular; b) transmitting a light signal along the cable and receiving a reflected signal from the region of interest; and c) interpreting the received signal to obtain information about fluid flowing into or out of the wellbore in the region of interest; wherein step c) comprises; i) assessing amplitude and frequency spectra across an array of channels; ii) conditioning the received signal by removing at least a portion of the signal that is not related to flow; iii) assessing flow regimes across depths and times; iv) calculating axial flow/s within the wellbore using relationships for axial flow; and v) calculating flow into or out of the wellbore at one or more points using relationships for flow through an orifice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification