Measurement device and support for use in a well

The invention provides a support for measurement means for monitoring and/or studying a fluid reservoir ( 13 ) through which at least one well ( 11 ) passes, said support comprising: a cylindrical tube ( 2 ); and a jacket ( 3 ) surrounding said cylindrical tube. According to the invention, said jacket ( 3 ) has at least one recess ( 4, 5 ) for receiving means ( 6 ) for measuring a characteristic representative of said reservoir and/or connection means ( 7 ) leading to power supply and measurement-processing means ( 16 ). The invention also provides a measurement device for monitoring and/or studying a fluid reservoir ( 13 ) through which at least one well ( 11 ) passes, said device comprising: power supply and measurement processing means ( 16 ); means ( 6 ) for measuring a characteristic representative of said reservoir, and connection means ( 7 ) connecting said measurement means ( 6 ) to said power supply and measurement processing means ( 16 ). According to the invention, said device ( 10 ) being characterized in that it further comprises at least one support ( 1 ) according to any preceding claim, with said measurement means ( 6 ) and said connection means ( 7 ) being housed in the recesses ( 4, 5 ) in the jacket ( 3 ) of said support.