Systems and methods for monitoring a well
View Patent ↗A method for identifying fluid migration or inflow associated with a wellbore tubular, comprises measuring strain of the wellbore tubular with a system comprising at least one string of interconnected sensors that is arranged such that the sensors are distributed along a length and the circumference of the wellbore tubular; establishing a baseline that is a function of steady state strain measurements within a first time period; and identifying fluid migration or inflow where strain measurements substantially deviate from the baseline within a second time period.
1. A method for identifying fluid migration or inflow associated with a wellbore tubular, comprising:
measuring strain of the wellbore tubular with a system comprising at least one string of interconnected sensors that is arranged such that the sensors are distributed along a length and the circumference of the wellbore tubular,
establishing a baseline that is a function of steady state strain
measurements within a first time period; and
identifying fluid migration or inflow where strain measurements substantially deviate from the baseline within a second time period.
2. The method of claim 1 , wherein the wellbore tubular is a casing and identifying fluid migration comprises identifying strain measurements that are less than the baseline.
3. The method of claim 1 , wherein identifying fluid migration comprises identifying strain measurements that extend along a length of the wellbore tubular.
4. The method of claim 1 , further comprising identifying a boundary between strain measurements that deviate from the baseline and strain measurements that are substantially at the baseline.
5. The method of claim 4 , further comprising determining the rate of fluid migration as a function of movement of the boundary.
6. The method of claim 4 , further comprising determining the direction of movement of fluid migration as a function of movement of the boundary.
7. The method of claim 1 , further comprising injecting a fluid into a well associated with the wellbore tubular.
8. The method of claim 7 , further comprising determining the quality of cement in an annulus as a function of fluid migration.
9. The method of claim 1 wherein the wellbore tubular is a perforated tubular.
10. The method of claim 9 , further comprising measuring temperature along a length of the perforated tubular.
11. The method of claim 9 wherein identifying inflow comprises identifying strain measurements that deviate from the baseline at the perforated tubular.
12. The method of claim 1 , wherein the wellbore tubular is an outermost one of concentric casings.
13. The method of claim 1 , further comprising measuring external pressure on the wellbore tubular.
14. The method of claim 1 , further comprising measuring temperature of the wellbore tubular.