Determining Characteristics Of A Fracture

An assembly comprising:

• a tubular body positionable in a wellbore for allowing a flow of treatment fluid to pass through a stimulation zone of the wellbore;
• electromagnetic field generators coupled to the tubular body for generating electromagnetic fields in different segments of the wellbore;
• electromagnetic sensors coupled to the tubular body for determining an amount of the flow traversing a perforation into a fracture zone based on measuring data about the flow passing through the electromagnetic fields;
• and
• a pressure sensor coupled to the tubular body for detecting a pressure wave generated by the flow, the pressure wave and the amount of the flow traversing the perforation being usable to determine a characteristic of a fracture in the fracture zone.

A method comprising:

• measuring data about a flow of treatment fluid passing through a first segment and a second segment of a tubular body using electromagnetic sensors, the tubular body being positioned in a wellbore, the first segment being closer than a perforation in the wellbore to a source of the flow, and the second segment being farther than the perforation from the source of the flow;
• detecting a pressure wave generated from a portion of the flow traversing the perforation into a fracture zone or the flow moving in the fracture zone using a pressure sensor coupled to the tubular body;
• and
• determining a characteristic of a fracture in the fracture zone based on the data and the pressure wave.