Abstract: Methods and mediums for estimating stimulated reservoir volumes are disclosed. Some method embodiments may include obtaining microseismic event data acquired during a hydraulic fracturing treatment of the formation, the data including event location and at least one additional attribute for each microseismic event within the formation; filtering the microseismic events based on the at least one additional attribute; determining a density of filtered microseismic events; weighting the filtered microseismic events based on the density; and determining a stimulated reservoir volume estimate based on filtered and weighted microseismic events.

Abstract: A method can include receiving acoustic emission data for acoustic emissions originating in a formation, performing a moment tensor analysis of the data, thereby yielding acoustic emission source parameters, determining at least one acoustic emission source parameter angle having a highest number of associated acoustic emission events, and calculating an in situ stress parameter, based on the acoustic emission source parameter angle. A system can include multiple sensors that sense acoustic emissions originating in a formation, and a computer including a computer readable medium having instructions that cause a processor to perform a moment tensor analysis of the data and yield acoustic emission source parameters, determine at least one acoustic emission source parameter angle having a highest number of associated acoustic emission events, and calculate an in situ stress parameter, based on the acoustic emission source parameter angle.

Abstract: Methods for treating a shale formation may include injecting a pad fluid including a shale stabilizing agent into a shale formation to generate one or more fractures. The method may also include injecting a fracturing slurry including proppant particulates into the one or more generated fractures such that the proppant particulates form microfractures along shale fracture faces. At least a portion of the proppant particulates may be at least partially coated with at least one oxidizing agent.

Abstract: A method and system for inducing secondary orthogonal fractures in an underground formation by introducing a proppant carrying fluid into a hydraulic fracture in an underground formation at high pressure is provided. The pressure of the proppant carrying fluid is lowered at a rate allowing the fluid to exit the formation while the proppant remains in place within the fractures. The pressure of the fluid is then rapidly reduced, creating fractures orthogonal to the surface of existing fractures by pushing remained proppant against hydraulic fractures walls. The orthogonal fractures can be opened with high pressure fluid and propped. In this way, the portion of the formation in fluid flow communication with the wellbore is increased.

Abstract: Methods relating to using fracturing fluids in fracturing process for fracturing of subterranean formations are provided. The methods comprise sequentially injecting into a wellbore, alternating stages of a low-viscosity fracturing fluid having a first viscosity and a high-viscosity fracturing fluid having a second viscosity, wherein there is a viscosity difference such that the first viscosity is lower than the second viscosity.

Abstract: A multi-layer composite synthetic test bed may be used to model fracture propagation and fracture networks. For example, a fracturing fluid may be introduced into a multi-layer composite synthetic test bed at a pressure and a flow rate sufficient to create a fracture network therein. Then, the fracture network may be analyzed to produce synthetic fracture data, which may be used in a fracture model.

Abstract: In some aspects, an acoustic analysis system includes an acoustic source and a laser vibrometer. In some instances, the acoustic source can generate an acoustic signal in a wellbore defined in a subterranean region, and the laser vibrometer can detect movement of a surface in the wellbore in response to the acoustic signal. The detected movement can be analyzed, for example, to identify properties of materials in the subterranean region.