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Keywords: hypocenter
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425114
... surveys in an active hydrocarbon development area. Joint interpretation is enabled by combining microseismic data with seismic-reflection data and displaying the data in depth. A geological picture is constructed by visualizing microseismic hypocenters. This type of visualization can be used to determine...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425789
... to individual clusters, confirm stage isolation, and monitor offset well fracture driven interactions (FDI’s or “frac hits”). A temporary wireline deployed fiber in a second well is used to monitor for FDI’s. Both fibers are used to collocate microseismic hypocenters to further image the progression...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425638
... exposition hydraulic fracturing microseismic event arrival time migration-based method reservoir characterization crosscorrelation pick receiver exploration geophysicist 10 waveform hypocenter Crosscorrelation time-pick workflow of microseismic data starting from migration-based locations Yu...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995048
... and calibrate a 3-D velocity model for hypocenter location, or the determination of accurate absolute origin times. This method also implicitly accounts for factors that are often ill constrained for most velocity models, such as transverse isotropy of the medium, since these factors similarly affect both...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996453
... ABSTRACT In this paper, we present a new workflow to simultaneously invert microseismic hypocenters and the anisotropic velocity model for unconventional reservoirs. Compared to previous work (Li et al., 2014), we developed a new layered linear inversion (LLI) method to better locate...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-16890707
... ABSTRACT Obtaining precise hypocenters of microseismic events is the primary objective of contemporary microseismic surveys. The sought precision usually hinges on two factors: an accurate velocity model, its inaccuracy biasing hypocenters of an entire event population, and an adequate data...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13236710
... anisotropic media, and by distributing multiple masters in the subsurface to sample its heterogeneity. The contributions from different master events to the hypocenter of a given slave are automatically weighted to enhance the influence of adjacent masters, ensuring the precise slave location, and to suppress...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5811224
.... The acquisition geometry used in this 3D seismic survey principally involved 3C geophones deployed in lines parallel to the wells shown in Figure 1. A sampling interval of 2 ms was used, and the record length was 4s. The Figure shows hypocenters of micro-earthquakes displayed as dots, with dot size representing...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5750205
... horizons for surface microseismic geometries, ensures the calculation of precise event hypocenters at appreciable distances from the master. We test the relative location technique on field data to demonstrate its accuracy, computational efficiency, and insensitivity to velocity errors. Introduction...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5931898
... aftershock imaging hypocenter Reflection imaging using earthquake sources: A novel application of reverse vertical seismic profiling (RVSP) Diego Quiros*, Larry D. Brown, Anastasija Cabolova, Cornell University; Chen Chen, Shell Oil Company; Kathy Davenport, John Hole, Liang Han, Martin C. Chapman...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5888848
... et al., 2011), i.e., multiple sources clustered along the time axis. Detecting and discerning each hypocenter therefore requires an evolving microseismic image that has high-resolution in both space and time.. time-reversal imaging receiver imaging reservoir characterization source location...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5908346
... Summary The spatial distribution of rock properties contains substantially more valuable information about the hydraulic fracturing process than a map of the hypocenter locations. Here, I introduce a methodology for processing microseismic data that reduces lengthy microseismic records...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0902
... Summary We preset an integrated study of multi-stage hydraulic fracture stimulation of two horizontal wells in the Bakken Formation in the Williston Basin, North Dakota. We analyze and compare two sets of independently processed microseismic hypocenter locations recorded in six vertical...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1094
... SUMMARY Similar to surface reflection data, microseismic data also contain multiply-scattered events. They are especially prevalent in borehole microseismic data because of low attenuation. These scattered events, if not imaged accurately, can lead to the spurious microseismic hypocenters...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1073
... SUMMARY Surface microseismic data is being increasingly used in monitoring hydraulic-fracturing. Here, we suggest changes in the acquisition as well as processing stages to improve microseismic imaging and source characterization. Improved microseismic hypocenter imaging and reliable source...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0185
... Summary To improve the accuracy of microseismic event location, we developed a double-difference tomographic method for determining the hypocenters and the anisotropy of the earth model. These events are selected from a microseismic dataset monitoring a Middle Bakken completion in the Beaver...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1397
... coherence measure upstream oil & gas ugly event coherence maxima mechanism analysis alignment intensity yz plane hypocenter source event signature Alignment intensity for discriminating Good, Bad, and Ugly microseismic hypocenters Peter C. Luh*, Charles Sicking, Stu Nelan, and Ivan Rabak...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1382
... double-difference method anisotropic tomography sensitivity main menu microseismicity location hypocenter differential travel time upstream oil & gas microseismicity location thickness travel time Microseismicity location and simultaneous anisotropic tomography with differential travel...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1383
... smaller than those normally detected by hypocenter methods. The seismic emissions that are persistent over time are extracted and then converted into the fracture network. The images can be computed over time intervals that range from as small as 1 minute to time intervals as large as 60 minutes...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-1499
... seismic monitoring system reservoir characterization artificial intelligence rawlinson relocation inversion method time dependent seismic monitoring system machine learning hypocenter travel time event location database velocity model upstream oil & gas algorithm geyser network...

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