Abstract: A method for characterizing fluid flow properties in a pipe includes measuring pressure of a fluid flowing in the pipe. A pressure of the fluid in the pipe is changed from a first pressure to a second pressure. The changing pressure is performed so as to induce tube waves in the pipe. Location along the pipe is determined of at least one of (i) magnitude of changes in internal diameter in the pipe, or (ii) fluid flow friction factor of the pipe from tube wave induced events in the measured pressure. In some embodiments, the changing pressure is performed by changing a flow rate of fluid in the pipe.

Abstract: A method for determining flowing fluid pressure loss in a well includes moving fluid through a well pipe and perforations in a well pipe at a first rate. A pressure of the fluid moving at the first rate is measured. The rate of moving fluid is changed to a second rate. The rate is changed so as to induce tube waves in the well. Pressure of the fluid moving at the second rate is measured. The measured pressures are used to determine frictional fluid pressure loss in the well pipe and frictional and fluid pressure loss through the perforations. The measured pressures and determined frictional fluid pressure losses are used to determine a fluid pressure outside the perforations.

Abstract: A method and a system to determine fracture properties during standard operations and injection tests. Fracture compliance, fracture closure pressure, and perforation friction can be determined using a combination of acoustic data, pressure decay data, and wellbore models. A method of automating and adjusting fracture design in real-time. A method and system to recover active, single active pulse data from a background noise dataset.

Abstract: A method and a system to determine fracture properties during standard operations and injection tests. Fracture compliance, fracture closure pressure, and perforation friction can be determined using a combination of acoustic data, pressure decay data, and wellbore models. A method of automating and adjusting fracture design in real-time. A method and system to recover active, single active pulse data from a background noise dataset.