Pressure Drop Analysis Of New Technologies And Software Development

With the continuous development of hydraulic fracturing technology, Fracture calibration tests play a more and more important role during the fracturing construction. However, normal pressure decline analysis models are only based on the stage before closure which must waste much recorded data, and also normal models are no longer suitable for pressure decline which under the condition of forced fracture closure.As a result, this paper has developed and perfected the normal models, and then has come to a new technology that can solve the shortage as expatiated successfully. And the main contents included in this paper are as follows:(1) Based on normal models, a comprehensive temperature model was founded, and then relations between temperature and pressure data were analyzed.(2) Given a const or variable flow-back rate, a pseudo-three dimensional analysis model has been founded, and then relations between well head pressure and the radius of the flow back choke can be obtained, which could help tochoose the choke size and control the flow-back process.(3) Based on normal G function, a new F function was firstly put forward, which can magnify the variable extent of pressure and then help to identifythe closure -point from the (dp)/(dt)~F(δ) plot, as a result an accurate closuredtpressure can be gained more simply and more directly.(4) An analysis model after closure was founded, and this model could make good use of the pressure decline data and also can figure out the closure- pressure, which can direct and validate the correctness of the analysis model before closure very well.(5) The procedure of pressure analysis was worked out according to the visual principle with VB6.0, and then models founded in this paper were examined by fields' data.