Production Numerical Simulation Of Horizontal Wells On Shale Oil Reservoirs

There is a big difference between shale reservoir and conventional reservoir in reservoir property,occurrence state and mechanism of seepage,as a result,the research technique of conventional reservoir and the theory of fluid seepage couldn't applied to the study of the nature of shale reservoir and the law of shale oil and gas flow.In this paper,three mathematical models are established for various seepage characteristics in shale reservoir.There is the boundary slippage phenomenon in organic shale porosity,the smaller the aperture,the sliding phenomenon more obvious,combining with the theory of fractal porous media,core level shale matrix fractal permeability model is set up,and analyze its influencing factors;Based on the saturation experiment of shale oil and water,a theoretical model of shale oil and water saturated with organic matter adsorption was deduced,and the reservoir performance of shale oil was analyzed in detail.Based on the above understanding,the shale reservoir fracturing horizontal well productivity model is established,according to the different regions of special seepage characteristics,numerical model for the production of rectangular coordinate system is derived and the cylindrical coordinate system,the three-linear flow theory model of fracturing horizontal well is verified,and the output of shale oil is obtained,the production and productivity prediction of shale reservoirs provide strong support.