METHOD AND SYSTEM FOR ANALYZING AND PROCESSING CONTINUED FLOW DATA IN WELL TESTING DATA

摘要

Methods and systems analyze continued flow data in well testing data. Embodiments can determine relations between an isochron rate and influence factors under pre-detected lithologic conditions, acquire relational data between the isochron rate and the lithology of a reservoir, the structure of the reservoir, and fluid properties; establish a mathematical model of the isochron rate; collect bottom hole pressure at different collection moments respectively during the reservoir well testing process; acquire a measured isochron rate curve between the isochron rate Vp and the constant duration t; select well testing interpretation model parameters; calculate a model isochron rate Vp′ at different moments according to the mathematical model of the isochron rate and the selected well testing interpretation model parameters; acquire a model isochron rate curve between Vp′ and the model constant duration t′; and fit the model isochron rate curve and the measured isochron rate curve to acquire reservoir characteristic parameters.

主权项

1. A method for analyzing and processing continued flow data in well testing data, comprising:
determining relations between an isochron rate and influence factors under pre-detected lithologic conditions, wherein the relations comprise a relation between the isochron rate and a percolation state, a relation between the isochron rate and permeability, a relation between the isochron rate and pollution, and a relation between the isochron rate and fracture channeling characteristics; acquiring relational data between the isochron rate and the lithology of a reservoir, a structure of the reservoir, and fluid properties according to the relations between the isochron rate and the influence factors; establishing a mathematical model of the isochron rate; collecting bottom hole pressure at different collection moments respectively during the reservoir well testing process; acquiring a correspondence curve Vp˜t between the isochron rate Vp=(P2−P1)/(t2−t1) and the constant duration t=t2−t1 as a measured isochron rate curve, wherein P2 and P1 are pressure values collected at the end moment t2 and the start moment t1 of the constant duration t, respectively; selecting well testing interpretation model parameters; calculating a model isochron rate Vp′ at different moments according to the mathematical model of the isochron rate and the selected well testing interpretation model parameters; acquiring a correspondence curve Vp−t between Vp and the model constant duration t=t2−t1 as a model isochron rate curve, wherein Vp′ is an isochron rate corresponding to the model constant duration t′ acquired according to the selected well testing interpretation model parameters under the mathematical model of the isochron rate; and fitting the model isochron rate curve and the measured isochron rate curve to acquire reservoir characteristic parameters comprising permeability K and channeling time tc.