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US 7,055,604 B2Granted
Use of distributed temperature sensors during wellbore treatments
AssigneeSchlumberger Technology Corporation
InventorsVirginia Jee, Nicolas Flamant, Hubertus Thomeer, Sarmad Adnan, Michael Gay
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Abstract
The invention relates to a method for treating subterranean formation comprising providing distributed temperature sensors, injecting a treatment fluid and monitoring the temperature across the treatment interval during the injection process.
Claims20
A method for treating a drilled well, the method comprising the steps of:
- positioning distributed temperature sensors on a fiber along an interval within a well, wherein the distributed temperature sensors provide substantially continuous temperature monitoring along the interval;
- obtaining a baseline temperature profile across the interval;
- monitoring substantially continuously the temperature along the interval;
- calculating a differential temperature profile across the interval relative to the baseline temperature profile;
- injecting a fluid into the well and into one or more zones surrounding the interval;
- shutting-in the well until the temperature in the well substantially stabilizes;
- monitoring the shut-in temperature along the interval during the shut-in period;
- determining the shut-in temperature deviation relative to the baseline temperature profile across the interval;
- and
- determining the one or more formation zones in which the injected fluid flowed.
7 more elements
A method for treating a drilled well, the method comprising the steps of:
- positioning distributed temperature sensors on a fiber along an interval within a well surrounded by one or more formation zones, wherein the distributed temperature sensors provide substantially continuously temperature monitoring along the interval;
- obtaining a baseline temperature profile across the interval;
- monitoring substantially continuously the temperature along the interval;
- calculating a differential temperature profile across the interval relative to the baseline temperature profile;
- injecting a fluid non-reactive with the one or more formation zones into the well and the one or more formation zones;
- calculating the injectivity of the one or more formation zones based on temperature profile along the interval during the step of injecting the non-reactive fluid;
- injecting a fluid reactive to the one or more formation zones into the well and into one or more formation zones surrounding the interval pursuant to the calculating the injectivity step;
- shutting-in the well until the temperature in the well substantially stabilizes;
- monitoring the shut-in temperature along the interval during the shut-in period;
- determining the shut-in temperature deviation relative to the baseline temperature profile across the interval;
- and
- determining the one or mare formation zones in which the injected fluid flowed.
9 more elements
Dependencies are inferred from the claim text.