Theoretical Study Of Production Prediction And Well－test Analysis Of WeIIs By Hydraulic Fractured

As it is used widely in exploration and development in the low permeability oil-gas reservoirs, and a great deal of economical benefit were achieved, the technique of hydraulic fracturing has been developed rapidly. The science and reasonable development in the low permeability reservoir is very important and urgent. With the development of new technology in the oil field, all kinds of corresponding theories and technologies are carrying out deeply.A hydraulic fracturing is producted by manpower fracture. Now production dynamic has become one question of reservoir engineering with fracturing. In order to develop economically and reasonably we need to analysis and estimate fractured effect, to predict oil rate. Several methods have been proposed in the literature for forecasting rate. In present study the methods of stimulation ratios and type curves are discussed. Prediction of stimulation ratios in vertically fractured, damaged wells is accomplished with a mathematical model relating stimulation ratio to relative conductivity of fractures and relative curves are plotted. Then transient flow behavior of a vertically fractured well producing at constant bottom-hole pressure is studied in an infinite homogeneous reservoir and in a double porosity reservoir. A mathematical model is established without considering skin factor. And analytic solutions are also presented applying Laplace transform. When plotted in terms of dimensionless rate and time, a type curve matching procedure can be used to obtain the formation and fracture characteristics. Theoretically effective analysis is processed.Furthermore a elementary theory study was carry through with horizontal fracture producing at constant pressure in an infinite homogeneous reservoir. An analytical solution was developed by means of the concept of Green's functions and Newman's product method. Then type curves were plotted.