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Directivity of linear sources

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Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0940
... frequency domains. The lateral directivity is calculated from an accurate estimation of the source array geometry. The actual air-guns positions are retrieved from inversion of joint near-fields recordings of starboard and portside source arrays. The three-dimensional directivity is then monitored with an...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997906
... map the fracture geometry: the direction of fracture propagation, fracture length and height. Numerous authors and companies try to convert the measured microseismic information into estimations of reservoir production. These approaches use microseismicity to constrain linear and non-linear diffusion...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17430461
... 1 Real-Data Comparisons of Direct-S Modes Produced by P Sources and Gold-Standard S Sources: Bob A. Hardage*, Bureau of Economic Geology, Jackson School of Geoscience, Austin, TX. Summary A series of field tests have been done to compare direct-S illuminating wavefields produced by all of the...
Proceedings Papers

Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-1165
... interpolation function interval velocity Application of the Modified rms Inversion Technique on Real CMP Marine Data Including Directivity Effects Adelson S. de Oliveira, Petrobras, Brazil; and Jacob T Fokkema*, De@ University of Technology, Netherlands SUMMARY Arrays of source aud raeivers introduces in...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215003
... Valhall in the visco-acoustic vertical transverse isotropic approximation : Geophysical Journal International , 202 , 1362 – 1391 , doi: 10.1093/ gji /ggv226 . Puzyrev , V. , S. , Koric , and S. , Wilkin , 2016 , Evaluation of parallel direct sparse linear solvers in...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5020
... shear reflections that present not just the linear and sinusoidal moveouts evident as a function of source- receiver offset and nominal receiver azimuth, but also a significant polarity signature that is a function of the reflected wave s particle motion direction. A variation of 3D slowness time...
Journal Articles
Journal of Ship Research (2021)
Paper Number: SNAME-JSR-04200025
Published: 14 April 2021
... by the surface at frequencies above a transition frequency which is identified for the submerged monopole and horizontal dipole. Directivity patterns for monopole and dipole sources for selected ratios of source depth to wavelength are presented. Limiting functions for the directivity of the sub...
Proceedings Papers

Paper presented at the SPE/IADC International Drilling Conference and Exhibition, March 5–7, 2019
Paper Number: SPE-194082-MS
... published drilling models and highlights the similarities and differences for commonly used drillstring hydraulics, dynamics, directional, and bit-rock interaction models. The key requirements for re-usability of the models and code are: 1) The model itself must be available as open source, well documented...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5912838
...A first comparison of the inverse scattering series non-linear inversion and the iterative linear inver- sion for parameter estimation Jinlong Yang and Arthur B. Weglein, M-OSRP, University of Houston SUMMARY The inverse scattering series (ISS) direct non-linear inversion and the iterative linear...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 22–24, 2019
Paper Number: SPE-196985-MS
... collecting and utilizing water from underground and surface sources. The current direction of development of multi-stage hydraulic fracturing is increasing the number of stages and the volume of the proppant. So the main task of fracturing companies in Russia is to optimize the process of collecting and...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-634
.... We used Nx = 50 points for the resolution in x-direction, and Nc = 15 sources. We performed 2000 time steps with a fixed discretisation of t¯ = 0.01. This means that a smaller physical time t is reached after the 2000 steps for the case Ly = 20m (see (6 Our finding is shown in Fig. 2, top panel, and...
Proceedings Papers

Paper presented at the ISRM SINOROCK 2013, June 18–20, 2013
Paper Number: ISRM-SINOROCK-2013-117
... Abstract The micro-seismic monitoring work during linear excavation process of deep tunnel has the following characteristics: many working faces are constructed simultaneously; the sensor arrays are located in the rear of the working face; the vertical direction coordinate gap of all sensors...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, October 25–27, 2016
Paper Number: SPE-182207-MS
... Intelligence data quality measurement device local outlier factor albertoni producer waterflooding mechanism outlier Injection Rate Multivariate reservoir linear characterization model corrupted data dataset nobakht injection data injection society of petroleum engineers production rate...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-568
... source-physics experiments (SPE) in fractured granitic rock mass were conducted at the Nevada National Security Site (NNSS). SPE data will be used to explain the genesis of the observed shear motions. ARMA 15-568 Application of HPC and Non-Linear Hydrocodes to Uncertainty Quantification in Subsurface...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418412
... pass operator, which, used in conjunction with the steep- In our work, we adopt the Alternating Direction Method of est descent method, guarantees solutions that honor simultane- Multipliers (ADMM) method (Boyd et al., 2011) to compute ous source records. We show that a substantial improvement the...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0031
...., common receiver or CMP) gather and the filtered result in the most coherent direction is selected as the output. Tests on both synthetic and real marine seismic data simulating blended acquisition confirm the effectiveness of our proposed MD-VMF approach. Introduction The concept of simultaneous sources...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-2434-MS
... (CAM): Emulating Multiple Data Sources (Production Rates, Water Cuts, Pressure Gauges, Flow Regime Changes, and Ruud Weijermars*1, Kiran Nandlal Stegent2 1. Harold Vance Department of Petroleum Engineering, Texas A&M University, 3116 TAMU College Station, TX 77843-3116, USA; Houston, TX 77032, USA...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215368
... ABSTRACT Although conventional separate inversions can generate useful models, better results can be derived from jointly estimated models since this extra information reduces the ambiguity or non-uniqueness of the problem. We evaluated a joint inversion scheme applied to controlled-source...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426004
... High-resolution ground-penetrating radar (GPR) images of the internal stratigraphy of linear dunes in the Namib Sand Sea of Namibia are used to demonstrate changing current directions, bedform accumulation patterns, and non-depositional and erosional events. The primary observation is an upward...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5864005
... direct solvers are superior when the number of sources in one simulation is of hundreds or thousands and the size of the resulting linear system is still not prohibitively large. Compared to the cost of the matrix factorization, the number of RHS does not affect seriously the computation time. Previous...

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