... Distributed acoustic sensing (DAS) is a rapidly developing technology that can be used for characterizing the geometry and propagation of hydraulic fractures. DAS provides observations of microseismic wavefields with high spatial resolution, which contain direct P- and S-arrivals as well...

... Cretaceous, Indus Basin. The tight gas reservoir and hydraulic fractures are characterized respectively and a static-dynamic model iteration technique are used to build a predictive reservoir model. The modeling method in this research includes: (1) geologic process analysis based on core, borehole logs...

... reservoir applied geoscience geophysics upstream oil & gas unconventional reservoir jin hydraulic fracture international american association toolkit spatial resolution survival toolkit unconventional resource technology conference reservoir characterization energy 10 das...

... In recent years, the development of distributed acoustic sensing (DAS) technology has enabled direct monitoring of subsurface strain during hydraulic fracturing operations. Most low frequency (<1Hz) DAS signals (LFDAS) exhibit strain or strain-rate patterns that are characteristic...

... wells are located. This observation indicates that the length of hydraulic fractures in the Codell formation is more than twice of that in the Niobrara. Furthermore, we observe consistent vertical fracture connections between the two formations. Although we interpret that the observed fracture-geometry...

... We discuss the potential use of tube waves generated by perforation (or “perf”) shots as a means of assessing the near-well conductivity for hydraulic fractures, which influences well productivity. These tube waves were recorded on distributed acoustic sensing (DAS) during completion...

... ABSTRACT During hydraulic fracturing, focal mechanisms of microseismic events often exhibit a near-horizontal nodal plane. Previous studies have pointed out that this type of focal mechanism is consistent with stick-slip behavior on relatively weak bedding planes, adjacent to expanding...

... ABSTRACT I present two examples of microseismicity in the Midland basin where the source mechanism nodal planes indicate shearing is persistently aligned with the hydraulic fracture or, alternatively, orthogonal to the hydraulic fracture. I consider arguments for both possible solutions where...

... ABSTRACT Both active and passive seismic monitoring of hydraulic stimulation benefit from rock physics knowledge of the seismic signature of hydraulic fractures. The traditional rock physics models for natural fractures may not be a good fit for hydraulic fractures. We started with using...

... ABSTRACT Microseismicity has been used to monitor hydraulic fracturing for many years, and usage has increased in recent times due to the successful development of unconventional plays. However, there remain fundamental questions regarding the physical causes of the microseismicity...

... ABSTRACT Two primary classes of seismic events are typically associated with hydraulic fracturing of unconventional reservoirs. Small microseismic dip- or oblique-slip events are interpreted as a direct indicator of the opening of hydraulic fractures. A second class of events that is sometimes...

... ABSTRACT Scattered waves are visible in interstage DAS VSP data acquired after each stage of hydraulic fracturing. In this paper, we discuss three models, namely single hydraulic fracture (HF), low-velocity zone (LVZ), and tip diffractors (TD), to analytically and numerically analyze...

... ABSTRACT Due to their low permeability, achieving economic production from unconventional reservoirs entails hydraulic fracturing to increase the surface area in contact with the reservoir. Important to the design of efficient hydraulic fractures is an understanding of pore pressure...

... further for applications of hydraulic stimulation monitoring and diagnostics. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 8:30 AM Presentation Start Time: 8:55 AM Location: 303B Presentation Type: Oral delay time hydraulic fracture hydraulic stimulation velocity...

... ABSTRACT Distributed acoustic sensing (DAS) using fiber optics is a remarkable seismic data acquisition tool used for hydraulic fracture monitoring. DAS data within low-frequency bands has the potential to constrain hydraulic fracture geometry (Ge Jin et al., 2017). In this study we acquired...

... ABSTRACT Half-moon events are the predominately observed source mechanism during hydraulic fracturing. We explain, that special stress conditions are needed to produce these events, for instance close principal stresses and notable shear stresses. Using a numerical simulation we show how...

... to uids than the P-waves, to find out whether hydraulic fractures themselves could be imaged. Our seismic volume contains peculiar geobodies, growing precisely from perforation holes spaced at a 40 ft interval in a treatment well landed in the Middle Bakken, the geobodies penetrating through the Lower...

... dependent on the size and properties of the natural fractures combined with the fluid volume. Presentation Date: Tuesday, October 16, 2018 Start Time: 1:50:00 PM Location: 208A (Anaheim Convention Center) Presentation Type: Oral magnitude natural joint network hydraulic fracture reservoir...

... grechka waveform inversion hydraulic fracture michel microseismic data middle layer reservoir characterization jarillo michel algorithm vti media oscar jarillo michel inversion tensor seg international exposition wave phenomenon fracture tsvankin upstream oil & gas ilya...

... planar clouds only a few meters wide and oriented along maximum horizontal stress direction. Moment tensor solutions show a mix of strike-slip and dipslip shear mechanisms along failure planes aligned with the hydraulic fracture orientation. Formation microimager data indicate that natural fractures play...