The SRV Research Based On DFN Model In Microseismic

The microseismic events are received by the three-component receiver,the planar detector and the broadband station,and the microseismic event space position is obtained by Geiger and double difference method.Based on the microseismic DFN(discrete fracture network model),SRV(Stimulated Reservoir Volume)is mainly based on the microseismic spatial location and waveform information.SRV volume as an important parameter to evaluate the effect of fracturing,so its reasonable estimates are involved in various fields.The geometrical shape of fractured seam is obtained by numerical simulation and continuous calculation and numerical calculation.With the development of microseismic monitoring technology,the SRV volume estimation method based on microseismic has come into being,including the calculation of inclusions volume(including box body,ellipsoid,polyhedron,convex hull,concave hull,etc.).The volume of the inclusions is computationally convenient and can reflect the size of the SRV volume to a certain extent,but underestimates the complexity of the fractures produced by hydraulic fracturing and does not take the consideration of the link between microseismic events and fractures.The establishment of a discrete seismic network model based on microseismic can consider the interconnection between microseismic events and fractures.Alexandre proposed to establish a linear DFN model based on the spatial position and time of occurrence of events.Seifollahi established a planar DFN model by constraining the spatial location of the microseismic event and simulating the true fractured planar.This paper mainly deals with the establishment of the above two DFN models and introduces the back projection method on the basis of DFN model.We do a theoretical study of the calculation of SRV,we use the back-projection method to link the linear and planar DFN information with SRV.The aperture information and thickness information is added to linear and planar DFN to obtain an irregular body which can reflect the SRV,its volume is SRV.