Method and system for detecting a fracture width of a treatment of the previous residual shaft during an operation of fracturing well in training subterru00e1nea

摘要

Method and system for detecting a fracture width of a treatment of the previous residual shaft during an operation of fracturing well in training subterru00e1nea "a diagnostic test of candidate fracture is an injection of compressible or slightly compressible fluid As the liquid, gas, or a combination, the pressures in addition to the tension and pressure of fracture formation in situ minimumWith the decline of the pressure after the injection test recorded to detect a fracture that retains a residual width of treatments of previous stimulation. The diagnosis consists of injections of small volumes, with the injection time being a small fraction of the time required for the compressible or slightly compressible fluid from the reservoir to pseudo radial flow.It may be that the injection of fracture of a test occurs inistantaneamente and the results are obtained in a fracture hydraulic conductivity with pressure above the infinite open voltage closing of fracture during the closing before the decline of pressure and With pressure lower than the voltage of the closure of fracture during the part after the closing of declu00edThe field of pressure. The measurement data are processed in a processing pressure equivalent to the rate constant for obtaining pressure adjusted or pseudo variables adjusted, which are analysed to identify periods of closure before and after double unit slope Confirm a residue that retains the width.