Method and device for predicting oil and gas yield of compact oil and gas reservoir horizontal well

The invention provides a method and device for predicting the oil and gas yield of a compact oil and gas reservoir horizontal well. The method comprises the steps of establishing a reservoir structural exponential model and a productivity heterogeneous exponential model of a drilled vertical shaft according to drilling data of the drilled vertical shaft; establishing a largest monthly yield prediction model of the drilled vertical shaft according to the reservoir structural exponential model and the productivity heterogeneous exponential model; establishing a largest monthly yield prediction model of the horizontal well to be drilled at the position corresponding to the drilled vertical shaft according to the largest monthly yield prediction model of the drilled vertical shaft; establishing a yield predication model changing along with production time of the horizontal well to be drilled according to the largest monthly yield prediction model of the horizontal well to be drilled to predict the oil and gas yield changing along with the production time of the horizontal well to be drilled. By means of the method and device for predicting the oil and gas yield of the compact oil and gas reservoir horizontal well, the actual predicted yield matched with the oil and gas yield of the compact oil and gas reservoir horizontal well better can be obtained.