Acoustic Imaging For Wellbore Investigation

A logging system to produce images of a wellbore, comprising:

• an acoustic imaging tool;
• and
• surface equipment carrying said acoustic imaging tool and operable to selectively position set acoustic imaging tool within said wellbore;
• said acoustic imaging tool including,
• a chamber in fluid communication with said wellbore,
• a first acoustic transducer disposed at a first end of said chamber,
• a target disposed at a second end of said chamber, and
• at least one forward-looking second acoustic transducer disposed at a bottom end of said housing.

A logging method, comprising:

• disposing an acoustic imaging tool within said wellbore;
• admitting fluid from said wellbore into a chamber;
• transmitting a first ultrasonic signal through said fluid and said chamber;
• measuring a first reflection of said first ultrasonic signal and said chamber;
• determining a characteristic of said fluid from said first reflection;
• transmitting a second ultrasonic signal into said wellbore below said acoustic imaging tool;
• measuring a second reflection of said second ultrasonic signal;
• and
• generating a three-dimensional forward-looking acoustic image of said wellbore from said second reflection.