... ABSTRACT: Fiber Optic diagnostics are increasingly being used in reservoir development. Traditionally the use of the fiber has focused on either the completion or seismic diagnostics. Here we present how Distributed Acoustic Measurements (DAS) can be processed for joint microseismic (MS...

... ABSTRACT: Fiber-Optic sensing has become invaluable for analyzing stimulation effectiveness and fracture geometries in unconventional reservoirs. Distributed Acoustic Sensing (DAS) is a Fiber Optic-based technique that provides dynamic strain variations along the length of the fiber during...

... ABSTRACT: This paper describes the testing of a novel ground condition and slope stability monitoring system based on Distributed Rayleigh Sensing (DRS) on a landslide observatory operated by the British Geological Survey (BGS). The DRS system uses the backscattered light from buried fiber...

... understood but by simultaneous measurement of seismic and distributed quasi-static deformation, we can investigate these phenomena. This paper presents the results of a triaxial test on a dry, intact Rotondo granite sample implemented with both optical fibers to measure the distributed strain and calibrated...

... (including waste rock and mill tailings) to produce a silicate melt that can be pulled into fibers which in turn can be fabricated into fabric, building materials, rebar, ballistic cloth, and other chemically inert products that have advantageous properties. Our approach is to determine the chemical...

... ABSTRACT: We present a novel approach to slope stability monitoring using a Distributed Rayleigh Sensing system on conventional, commercial fiber optic cables. Commercially this technology is generally deployed for characterising short time period strains or Distributed Acoustic Sensing (DAS...

... ABSTRACT: Low-frequency Distributed Acoustic Sensing (DAS) is a cross-well measurement technique for interpreting fracture geometry during the fracturing process. It measures strain and strain rate of the fiber in the observation well that geomechanical responses of the rock can be obtained...

... ABSTRACT: In-well fiber optics Distributed Acoustic Sensing (DAS) data are widely used to estimate cluster fluid contribution and monitor cross-stage fluid communication. One common way of visualizing fluid distribution is through waterfall plots of energy attribute derived from the DAS data...

... that the plugging processes include bridging and sealing. The bigger particles would firstly bridge at the narrow section of the fracture, and then the smaller fibers would seal the pore-spaces of the bridging sections. The difference between the diameter of the bridge particle and the fracture width should...

... ABSTRACT: We conducted proppant transport experiments using water, slick water and linear gel with and without degradable fiber. Three types of proppant transport slot equipment were used for the experiments and the results were compared. If fiber was used for transporting proppant...

... ABSTRACT: This study evaluates the use of the synthetic polypropylene fibers (SPF) to mitigate Class G cement strength retrogression under high-temperature conditions. Cement samples with different SPF concentrations were prepared, half of the samples were cured at 38°C for 28 days...

... ABSTRACT: Although a new technology of fiber diversion was introduced to hydraulic fracturing for ultra-deep sandstone formation, the operation is not always effective. This paper focused on the fracture reorientation mechanism and the relationship between injection pressure and fracture...

...1. INTRODUCTION Underground metal mines typically use a combination of rockbolts, wire-mesh and shotcrete or fibercrete (usually 5 to 15 lb/yd3 of macro-synthetic fibers) to support excavations. These products and their installation sequencing are determined by both geotechnical and operational...

... ABSTRACT: In the current paper we present results of our first attempt to use Fiber Bragg Grating (FBG) sensors for strain measurements of rock samples under confining pressure. We have demonstrated that the FBG sensors are sensitive to asymmetrical load of rock samples. The main problem...

... ABSTRACT: A new optic fiber sensor for detection of the change in the difference between refractive indices of plastic optic fibers and that of the surrounding material is proposed. The sensor is made of two plastic optic fibers in the following way: the light emitted from a constant light...

... ABSTRACT: In recent years, service companies often use a low viscous, fiber-laden fracturing fluid. The added fibers not only assist in the transport of proppant based on mechanical suspension but also prevent proppant settling during fracture closure. Although the chemical composition...

... ABSTRACT: A new method for identifying type of material ahead of an optic fiber sensor is proposed. The sensor is made of two plastic optic fibers that are aligned side by side and glued together. The tips of these fibers are cut so that outward normal vectors of the cut surfaces are 90...

... of the fracture width is of great significance to study the fracturing process and fracture models (Perkins and Kern,1961). In 1978, Hill discovered the photosensitivity of the fiber (Hill et al.,1978). And then the world's first fiber Bragg grating (FBG) was produced. In 1989 Mendez applied FBG strain sensors...

... fracture process cable mechanics Upstream Oil & Gas crack length fiber eff fracture 1. INTRODUCTION Cyclic stress is one of the most common mechanisms associated with subcritical crack growth in rock (Atkinson, 1995). For example, the rocks have been subjected to cyclic stresses over a long...

... ABSTRACT: Recent research at Montana Tech has focused on demonstrating the effectiveness of the emerging fiber-optic-based distributed strain and temperature (DST) and distributed acoustic sensing (DAS) technologies in an underground environment, facilitating their adoption by the mining...