PRODUCTIVITY PREDICTION METHOD FOR FRACTURED HORIZONTAL WELL IN TIGHT OIL RESERVOIR

摘要

Disclosed is a productivity prediction method for a fractured horizontal well in a tight oil reservoir. The method comprises: firstly, subdividing, based on a fuzzy set, fractured horizontal wells in a tight oil reservoir into different categories; secondly, determining a relationship between geological parameters, fracturing construction parameters and average daily yield peaks of different categories of horizontal wells; then determining main control parameters affecting the yields of the fractured horizontal wells in the tight oil reservoir; and finally, establishing, according to the average daily yield peaks of the fractured horizontal wells in the tight oil reservoir and corresponding main control parameter data, an average daily yield peak prediction model by means of a regression analysis method, so as to predict the productivity of a horizontal well to be fractured in the tight oil reservoir. In the method, geological factor parameters and fracturing construction parameters are combined to make a prediction result be closer to an actual situation, which can be effectively used to evaluate a fracturing effect, thereby further improving and optimizing a fracturing construction plan.