Method for calculating SRF, SRA and SRV based on micro-seismic monitoring three-dimensional point set

The invention provides a method for calculating SRF, SRA and SRV based on a micro-seismic monitoring three-dimensional point set. The method comprises the steps of firstly projecting all three-dimensional data points to a horizontal plane, determining the Alpha shape of a planar point set by adopting an Alpha-shape method in the computational geometry, and calculating the area surrounded by the SRF, wherein the calculated area is the SRA; and then layering the micro-seismic three-dimensional point set in the vertical direction, calculating the SRF and the SRA of each layer according to plane distribution of in-layer event points, wherein the SRA of a single layer is multiplied by the layer height so as to acquire the SRV of the single layer, and the sum of the volumes of all layers is the total SRV. The method provided by the invention determines the SRF shape, the SRA and the SRV of a crack zone according to event point three-dimensional coordinate data of seismic monitoring so as to quantitatively describe the area and the volume of the crack zone, thereby being used for quantitatively estimating the production capacity after being fractured, and improving the accuracy of fracturing effect evaluation.