Integrated multiple parameter sensing system and method for leak detection

A method for detecting a leak source in a wellbore, comprising:

• measuring a first temperature parameter at a first point in said wellbore by a first temperature detector;
• measuring a first pressure parameter at said first point by a first pressure detector;
• measuring a first acoustic parameter at said first point by a first acoustic detector, said first temperature, pressure and acoustic parameters being first parameter measurements;
• measuring second and third acoustic parameters by second and third acoustic detectors located at a same axial position as said first acoustic detector;
• calculating an azimuthal angle and a radial distance with respect to a position of said logging tool to said leak source by correlating said first, second, and third acoustic parameters;
• and
• correlating said first parameter measurements to identify a leak source, said correlation comprising:
• determining expected parameter trends along said wellbore, said parameter trends being a temperature trend, pressure trend, and acoustic trend;
• determining threshold variations from said expected parameter trends;
• determining variations in said parameter measurements along said wellbore by comparing parameter measurements of a first zone to parameter measurements of a second zone;
• identifying said variations which fall outside said threshold variations;
• and
• detecting said leak source based upon said identification.

A logging tool comprising:

• a first temperature detector;
• a first pressure detector disposed in proximity to said first temperature detector;
• a first acoustic detector disposed in proximity to said first temperature detector;
• data acquisition circuitry coupled to said first temperature detector, said first pressure detector, and said first acoustic detector;
• at least second and third acoustic detectors equally disposed about a first circumference at a same axial position as said first acoustic detector;
• at least fourth, fifth, and sixth acoustic detectors equally disposed about a second circumference at a different axial position from said first acoustic detector;
• and
• a processor coupled to said data acquisition circuitry and arranged to correlate a temperature parameter, a pressure parameter, and an acoustic parameter to identify a leak source, said correlation comprising:
• determining expected parameter trends along said wellbore, said parameter trends being a temperature trend, pressure trend, and acoustic trend;
• determining threshold variations from said expected parameter trends;
• obtaining parameter measurements along said wellbore, said parameter measurements being a temperature, pressure and acoustic measurement;
• determining variations in said parameter measurements along said wellbore by comparing parameter measurements of a first zone to parameter measurements of a second zone;
• identifying said variations which fall outside said threshold variations;
• and
• detecting said leak source based upon said identification,
• wherein said data acquisition circuitry is coupled to at least said second, third, fourth, fifth, and sixth acoustic detectors;
• and
• wherein said processor is arranged to calculate an azimuthal angle, a radial distance, and an elevation to said leak source with respect to a position of said logging tool.

A method for detecting a leak source in a wellbore, comprising:

• measuring a first temperature parameter at a first point in said wellbore by a first temperature detector;
• measuring a first pressure parameter at said first point by a first pressure detector;
• measuring a first acoustic parameter at said first point by a first acoustic detector, said first temperature, pressure and acoustic parameters being first parameter measurements;
• measuring second and third acoustic parameters by second and third acoustic detectors located at a same axial position as said first acoustic detector;
• measuring fourth, fifth, and sixth acoustic parameters by fourth, fifth, and sixth acoustic detectors disposed at a different axial position from said first acoustic detector;
• correlating said first parameter measurements to identify a leak source, said correlation comprising:
• determining expected parameter trends along said wellbore, said parameter trends being a temperature trend, pressure trend, and acoustic trend;
• determining threshold variations from said expected parameter trends;
• determining variations in said parameter measurements along said wellbore by comparing parameter measurements of a first zone to parameter measurements of a second zone;
• identifying said variations which fall outside said threshold variations;
• and
• detecting said leak source based upon said identification;
• and
• calculating an azimuthal angle, a radial distance, and an elevation with respect to a position of said logging tool to said leak source by correlating said first, second, third, fourth, fifth, and sixth acoustic parameters.