... Abstract The Marcellus Shale Energy and Environmental Lab (MSEEL) provides a publicly available dataset and a hypothesis-driven field test of the significance of preexisting natural fractures at multiple scales on the effectiveness of the stimulation of an unconventional reservoir. Sonic...

... Abstract We developed a propagation algorithm that enables accurate calculation of hydraulic fracture geometry, even in the presence of thin layers and with a relatively coarse crack mesh. Conventionally, hydraulic fracture simulators either add one element at a time (less accurate) or require...

... Abstract Low-frequency distributed acoustic strain-rate sensors (LF-DAS) experience strain changes due to far-field fracture propagation. To better understand the LF-DAS response to fracture propagation, we performed laboratory-scale hydraulic fracture experiments with embedded optical strain...

... Abstract A new geomechanical modeling approach is presented to estimate hydraulic fracture width based upon joint inversion of near-field and far-field slow deformation data measured, respectively, by Distributed Acoustic Sensing (DAS) and Downhole Tiltmeter Fracture Mapping (DTFM) systems...

... Abstract Many have attributed the success of hydraulic fracturing in unconventionals to the development of increased reservoir contact area through complex fracture networks with significant shear-enhancement of flow on preexisting natural fractures. Core samples recovered in recent field...

... Abstract Hydraulic fracturing creates rough fracture surfaces, instead of smooth ones, in subsurface formations. It is challenging to simulate the complex proppant transport phenomena in rough fractures due to the roughness effect as well as the complex nature of the coupled particle-fluid two...

... Abstract For simplicity, planar fractures are usually used for simulating well performance. This is clearly an oversimplification for naturally fractured formations. Core data from both HFTS 1 and 2 show that a much more complex fracture network is created. In this work, a novel three...

... This study focuses on not just the volume to first fracture response (VFR), but also what the final geometry would be for each arrival based on the VFR. To do that, a volume-based growth rate is used that assumes the fracture is growing in a circular or elliptical geometry with a constant width...

... Abstract In SPE 18955, published in 1989, a strong case was made suggesting that observed rapid increases in treating pressure were not caused by fracture "tip screenouts". These conclusions were further supported by extensive laboratory studies of proppant bridging in slot-flow geometries...

...Net Pressure from PKN Style Fracture The net pressure obtained from a simple planar PKN style fracture can be estimated from Equation 1 , which was initially presented by (Nordgren 1972). Here, (Q) is the pump rate for a single fracture, and E’ is the plane strain modulus, μ is fluid...

... Abstract Microseismic and cross-well strain are both high-end diagnostic tools that provide insight into hydraulic fracture geometry and stimulation effectiveness. However, both datasets have limitations: for example, microseismic can over or underestimate the true fracture geometry, while...

... Abstract In this paper, we present a novel fracture diagnostic method to determine the geometry of multiple propagating fractures. The method relies on the measurement of the A zimuthally R esolved WE llbore S train T ensor (ARWEST) as a function of time at multiple locations...

...) algorithm to estimate the magnitude of the far-field DAS response for any spatio-temporal input. Moreover, we identify a discontinuity in displacement results following fracture hit, which is interpreted as an effect of rock plastic deformation, and for the first time we demonstrate that it may be related...

... Abstract We performed a modeling study calibrating a coupled "true" hydraulic fracturing and reservoir simulator to a complex set of observations from a parent-child well pad in the STACK play located in the Anadarko Basin area of Oklahoma. The model was constrained by sealed wellbore pressure...

... deformation during hydraulic fracturing and to subsequent pressure increases caused by intersections of fractures with horizontal wellbores. We show that wellbore strain measurements can be combined with surface wellbore pressure measurements to diagnose fracture intersection and estimate geometry and growth...

... Abstract Fracture growth in layered formations where the stresses and rock mechanical properties change frequently with depth is of great interest to researchers, especially when estimating the vertical growth of fractures in hydraulic fracturing treatments. The influence of formation stresses...

... Abstract Horizontal wells with multi-stage longitudinal fractures have been widely used to develop low-to-moderate permeability sandstone formations in enhanced oil recovery schemes. A long-held misconception exists that high fracture conductivity is not essential to well productivity...

... Abstract Monitoring the geometry of hydraulically induced fractures using a variety of frac diagnostic tools is a relatively expensive but necessary step to achieve successful development of unconventional reservoirs. Valuable insights about the hydraulic fracturing process can be determined...

... deployment. Finally, we demonstrate the value of the integrated application of field trials, fracture diagnostics, and well performance analysis to improve the stimulation design and capture additional value. The FO results enabled us to increase clusters per stage without diminishing cluster efficiency...

... Abstract Until recently, microseismic has been the primary diagnostic for estimating "bulk" or stage-level fracture geometry, including asymmetry due to parent-child interactions, for modern multi-cluster plug-and-perf completions. However, microseismic cannot provide details on individual...