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Journal Articles
SPE J. 24 (02): 215–223.
Paper Number: SPE-12571-PA
Published: 01 April 1984
... B in Part 1 of this paper. The critical step in the development of a computer algorithm based on the JBN method is the evaluation of the derivatives (d S g/dW) and [d(1/WI )/d(1/W)]-all other steps are straight forward. To estimate derivatives of data, one may represent each entire set of data...
Proceedings Papers

Paper presented at the SPE Annual Caspian Technical Conference and Exhibition, November 12–14, 2014
Paper Number: SPE-172342-MS
... filter the results by a particular facility. All numbers are color coded; targets are all set to zero, anything other than zero is shown in red color. Trend arrows show the comparison of last 30 days to previous rolling 30 days. Scorecard page displays the actual values of all the Process Safety...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5916442
... the PP and PS images is built into the objective function to achieve codepthing. The conventional way to analyze the shift between PP and PS images is to manually interpret corresponding major events. This method requires tremendous human time and is almost impossible to perform for all reflectors. DW...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998227
..., and a Roughness of 1.23. The regularized/DW model (red in Figure 6) has values of 1.65, 1.91, 1.14 and 0.56, all significantly superior to those of the original model. Conclusions Subtle, and not so subtle, features in our data are being missed due to our reliance on a single number to express how well a model...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5923950
...) It remains to discuss how one can implement the above system of equations for a reflection seismology geometry, where for- ward and backward have a different meaning for upward and downward propagating waves. T-MATRIX REPRESENTATION OF DWS In the real-space coordinate representation, all Green operators may...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17790853
... of stacking. In this paper, the relationship between semblance and stacking allows a new method of double-weighted stacking (DWS) to be created. This method applies the same local-similarity-weighting function to the calculation of both semblance and stacking, aiming to enhance the final stacking sections...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997911
... to improve the quality of the MSM and establish regional learning is the current MSM study focus by vendors. To meet the above requirement, we tried the following MSM surveys. Deep well survey (DWS): The traditional and the most universal MSM survey, which the instrument well are located near-by (usually...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5850767
... Page 3830 DOI httpdx.doi.org/10.1190/segam2015-5850767.1© 2015 SEG Simultaneous source separation Rank-constrained inversion We will write the desired unblended seismic data D in terms of its Fourier transform as follows D(t,xl ,yl) = Z D (w,xl ,yl)eiwt dw , (4) At a given monochromatic frequency...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1357
... time in NMR experiment from 10g of Crude Oil (CO), de-ionized water (DW), CaCl2 solution (Ca), NaCl solution (Na), MgCl2 solution (Mg) and Na2SO4 solution (SO4). All solutions have the same ionic strength (1.83mol dm-3). 0 5000 10000 15000 1 10 100 1000 10000 A m pl itu de dis tr ib ut io n Time (ms...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5869427
... that are associated to the largest singular values. The error E , however, will have energy spread over all the eigen-images (Trickett, 2003). sacchi seismic record cmp gather algorithm noise equation erratic noise seg application suppress erratic noise robust principal component analysis...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-196166-MS
... utilization across multiple assets, recognized cost savings due to usage of "off the shelf" equipment, frees up engineering time to focus on other critical design needs, as well as improved well construction performance due to increased repeatability. Bottom hole assemblies utilized in every DW operation...
Proceedings Papers

Paper presented at the Canadian International Petroleum Conference, June 13–15, 2006
Paper Number: PETSOC-2006-176
.... The use of DWS technology is the primary target for this system, but the system is built to enable other types of well stimulations/enhancements to be able to target candidates as well. CadWasp has been designed to identify most likely to succeed candidates, not all candidates by searching a massive...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5882419
... group the terms in equation (1) as in Moore (2004), MR = D, and (2) M = MR + (D Dw f MR) , (3) SEG New Orleans Annual Meeting Page 4448 DOI httpdx.doi.org/10.1190/segam2015-5882419.1© 2015 SEG Attenuation of water-layer-related multiples where f is a linear filter, determined by matching...
Proceedings Papers

Paper presented at the Canadian International Petroleum Conference, June 12–14, 2007
Paper Number: PETSOC-2007-105
... are justified since the dynamics of water coning and the position of the horizontal oil-water contact change with time. This new way of modeling DWS is possible due to advances in IMEX. Table 3 shows the different cases considered in the simulations. All the cases were run for G=0.03, Wsp=25 and M=10 and were...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1055
... acoustic sensors Figure 2: VSP at offset 25 m, dual a) strain and b) velocity DAS signals Figure 3:VSP at offset 25 m, combination by a) sum (DW field) and b) difference (UP field) of dual signals of Fig. 2. Page 1901SEG Denver 2014 Annual Meeting DOI httpdx.doi.org/10.1190/segam2014-1055.1© 2014 SEG Dual...
Proceedings Papers

Paper presented at the SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, October 17–19, 2017
Paper Number: SPE-186913-MS
... A further disadvantage of a PLT is that it cannot be in the well at all times during the DST, in particular during early clean-up periods and during down hole shut-ins. Lift forces on the cable and tool string may limit maximum achievable flow rates. A wireline PLT provides only a snapshot...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1500
... is computationally infeasible without the dimensionality reduction. INTRODUCTION Nowadays, industry tends to favor migration methods which vary from time or depth to one-way wave-equation and to reverse time and so on. All these migration methods are aimed at imaging subsurface reflectors, however, none...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0138
... initial 1D velocity model, the average velocity of the target area can be approxi- mated as 3.7 km/sec. We find the initial locations with a prob- abilistic grid search location algorithm (Lomax et al., 2000) using the homogeneous velocity model of 3.7 km/sec and a grid spacing of 5 m along all three axes...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0247
... exploration, the singularity of physical parameters of rock is very significant. For example, the velocity and direction of seismic waves on the interface will change, all these characteristics belong to singularity of geophysical signal. If the value and location of singularity can be determined, many...
Proceedings Papers

Paper presented at the Canadian International Petroleum Conference, June 8–10, 2004
Paper Number: PETSOC-2004-242
... rate more than twofold under all these production regimes. Because the process of water-free oil recovery in short time cannot be practically accomplished via conventional wells, DWS wells are shown to be effective in improving recovery for a given production increment. Acknowledgement This study...

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