| 摘要 |
<p>A method for detecting a fracture or thief zone 1 in a formation involves surrounding a wellbore section 3 being provided with a non-cemented perforated liner 4. A logging tool 6 provided with at least one temperature sensor 7, 8 is introduced into the non-cemented perforated liner 4, and a number of temperature measurements and corresponding positions are logged by means of the logging tool 6, whereby the temperature change over the length of the liner is analysed 4. The logging tool 6 includes a body provided with an annular flow barrier 10 arranged on the body and extending to the liner 4, thereby separating the inside of the liner 4 into an upstream section 11 and a downstream section 12. During the logging operation, a fluid having a temperature different from a temperature prevailing in the formation is caused to flow into the liner 4 in the downstream direction.</p> |
