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Directional survey for 3D reservoir modeling

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Proceedings Papers

Paper presented at the Offshore Mediterranean Conference and Exhibition, March 29–31, 2017
Paper Number: OMC-2017-636
... the formation tops used as control points to calibrate seismic horizons and reservoir boundaries into the 3D reservoir structural model. A workflow is proposed to take into account the uncertainties related to the directional surveys during reservoir structural modelling. A set of probable wellbore...
Proceedings Papers

Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3750525
... of the subsalt reservoir. An expensive drilling rig placed a constraint on the number of seismic source positions that could be realistically recorded in about 24 h, beyond which the survey would likely be cancelled due to the high costs involved. We show how a combination of advanced 3D tilted transverse...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-2855
.... Apart from complex sub-salt structures it was rare to use 3D ray-trace modelling in survey design and normally a dip direction was chosen. Some practitioners chose a strike direction possibly better for time imaging. Often the choice of survey direction was more arbitrary and based on logistics...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0709
..., resistivity contrast, and survey density. 3D modeling also shows that incorporating phase measurements increases reservoir detectability and stability of the results. Although Q3DRM has limited sensitivity and accuracy due to assumptions and data limitations, it can be applied rapidly to CSEM surveys, even...
Proceedings Papers

Paper presented at the SPE Heavy Oil Conference and Exhibition, December 6–8, 2016
Paper Number: SPE-184127-MS
... analysis; and 4) cap rock integrity analysis, if possible. Feasibility study and pre-survey modeling Challenges for acquisition of these 3D VSPs include illumination because of shallow target zones, vertical resolution to image the thin reservoir zones and cap rock, and spatial resolution due...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-1281
... of the dataset (3 separate 3D surveys with differing acquistion geometries and sail-line directions). Strategy adopted for 3D velocity model building and PreSDM. Benefits obtained by performing a final residual move-out correction on all common reflection point (CRP) gathers. Illustrations of imaging...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 15–18, 2021
Paper Number: SPE-207842-MS
... plume migration, reservoir architecture, sub-seismic faults and fracture networks as well as the caprock. Integration of quantitative geophysics and dynamic simulation with illumination modelling dignify the capabilities of 3D DAS-VSP for CO 2 plume migration monitoring. The storage site has been...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3174
... Summary A 3D matching method has been tested on four vintages of seismic data, covering a producing reservoir in the Norwegian Sea. We observe that, above this reservoir, the lateral and vertical alignment between the four surveys are very good, while below the reservoir there are both...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-3068
... direction giving rise to water depths that dip in the inline and crossline directions. Figure 1: Water-bottom time map of the survey area. Figure 2: Crossline from the 3D stack volume before SRME. The location of this line is shown on Figure 1. The primary target zone is indicated by the solid line...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0005
... be a consequence of the fact that a larger proportion of seismic data are acquired over mature fields with pre-existing 3D surveys. To improve resolution and quality for reservoir characterization purposes, new surveys with higher specifications are acquired. The desired quality enhancements are typically...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0629
... data. The project area hosting a proven reservoir was covered by a receiver grid and an orthogonal source lines grid extending beyond the receivers in the in line and cross line directions with all receivers active throughout the acquisition of both the orthogonal sets of source lines. We show that 3D...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216613
... (a) without and (b) with the reservoir layer. The red line indicates the source location. Color shows amplitude of Ex in log(VA-1m-2 Conclusions 3D marine CSEM modeling is still challenged by high computational cost because we often demand high- resolution results over a large survey area. We propose an novel...
Proceedings Papers

Paper presented at the SPE Middle East Oil and Gas Show and Conference, March 18–21, 2019
Paper Number: SPE-194845-MS
.... Through this, one then has a direct tie between 3D gravity (non-time-lapse) and the reservoir model itself for the accurate survey planning and integrated interpretation of field data. Density Change within a Reservoir Model during Production: While the 3D bulk density of a reservoir is useful...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25751-MS
... domain, originally developed for airborne EM surveys, to the interpretation of marine EM survey data. This makes it possible to invert the entire towed streamer EM surveys with no approximations into high-resolution 3D geoelectrical sea- bottom models. Our implementation is based on the 3D integral...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-195954-MS
... to the traveltime tomography inversion of the VSP direct arrivals. The updated tomography velocity model from the first break picks was then used for the FWI processes. Figure 2b shows the three deviated active wells that were used in the 3D VSP DAS fiber optic acquisition. The survey shares the same airgun...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5809882
... and 115 m with a relatively homogeneous overburden. Figure 4: Seismic structure information showing the chalk layer and the two reservoirs close to the chalk. In order to construct an appropriate 3D geoelectrical model which is used as the starting model in the anisotropic 3D inversion, we deployed...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-196138-MS
... of the geological models received is compromised in the event of the insufficient level of study by means of drilling, too. It is possible to predict the distribution of reservoirs and their properties for the fields of Eastern Siberia, but the saturation forecast on the basis of the 3D seismic survey data...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1247
... reservoir. In the past, 2D crosswell DC resistivity survey data have been acquired and interpreted with some suc- cess. We show that two-dimensional inversions of crosswell DC data produce low quality images with artifacts. The images are improved by carrying out 3D inversions. However, much improvement can...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3589262
... Surveys Chunling Wu*, Chevron Technical Center Summary We developed a 3D finite-difference tilted-orthorhombic elastic modeling code based on the first order wave Distributed acoustic sensing (DAS) is an emerging equations (Wu et al., 2019). The strain-rate tensor in the code technology for recording VSP...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0947
..., calculated fom a 3D geomechanical model during the time-period covered by the time-lapse seismic survey. Negative displacement indicates a downward movement. Note the difference in shape between (a) observed and (b) calculated compaction features outlined by the yellow and magenta lines. (c) Calculated...

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