OFFSHORE ELECTROMAGNETIC RESERVOIR MONITORING
First Claim
1. An offshore electromagnetic (EM) reservoir monitoring system that comprises:
- a light source that produces an interrogation light beam;
an array of EM sensors deployed at the bottom of a body of water and above one or more regions of interest within a subsea formation, the EM sensors coupled to each other and the light source with at least one optical fiber, wherein at least one of the EM sensors modulates the interrogation light beam in response to an EM signal induced into the subsea formation by an EM source;
a processor that couples to and controls the light source, and further couples to and processes the modulated light received from the array via the at least one optical fiber, wherein said EM sensors and said processor collect EM data to produce two or more EM surveys, each EM survey based on data sets collected at different times;
wherein each EM sensor is physically isolated from a surrounding subsea environment; and
wherein the two or more surveys are combined to produce a time lapse earth model of the one or more regions of interest.
1 Assignment
0 Petitions
Accused Products
Abstract
Offshore electromagnetic (EM) reservoir monitoring systems and methods, including a system with a light source producing a light beam and an EM sensor array deployed at the bottom of a body of water and above one or more subsea regions of interest, the array coupled to the light source with an optical fiber. An EM sensor modulates the interrogation light beam in response to an EM signal induced into the subsea formation by an EM source. The system further includes a processor controlling the light source, processing modulated light received from the array, and collecting data with the array to produce EM surveys, each EM survey based on data sets collected at different times. The EM sensor is physically isolated from a surrounding subsea environment. The surveys are combined to produce a time lapse earth model of the regions of interest.
4 Citations
20 Claims
-
1. An offshore electromagnetic (EM) reservoir monitoring system that comprises:
-
a light source that produces an interrogation light beam; an array of EM sensors deployed at the bottom of a body of water and above one or more regions of interest within a subsea formation, the EM sensors coupled to each other and the light source with at least one optical fiber, wherein at least one of the EM sensors modulates the interrogation light beam in response to an EM signal induced into the subsea formation by an EM source; a processor that couples to and controls the light source, and further couples to and processes the modulated light received from the array via the at least one optical fiber, wherein said EM sensors and said processor collect EM data to produce two or more EM surveys, each EM survey based on data sets collected at different times; wherein each EM sensor is physically isolated from a surrounding subsea environment; and wherein the two or more surveys are combined to produce a time lapse earth model of the one or more regions of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An offshore electromagnetic (EM) reservoir monitoring method that comprises:
-
causing a light source to direct a beam of light through at least one optical fiber to an array of EM sensors deployed at the bottom of a body of water and above one or more regions of interest within a subsea formation; receiving a modulated version of the beam of light, at least one of one or more EM sensors modulating the beam of light in response to an EM signal induced within the subsea formation by an EM source, each EM sensor being physically isolated from a surrounding subsea environment; collecting EM data based on the received modulated light beam and producing two or more EM surveys, each EM survey based on data sets collected at different time; combining the two or more surveys and producing a time-lapse earth model of the one or more regions of interest; and executing simulations using the time-lapse earth model to predict reservoir behavior and displaying simulation results. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification