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Feathering

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Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-1003
... contains regular sampling of inline and cross-line offsetsand does not reflect realistic field geometry such as streamer cable feathering. We carried out a synthetic experiment that accounts for theeffect of cable feathering during the acquisition. The results indicate that cable feathering has little...
Proceedings Papers

Paper presented at the 1992 SEG Annual Meeting, October 25–29, 1992
Paper Number: SEG-1992-0955
... point weighting factor spatial Feathering Correction for 3-D Marine Data Anat Canning* and Gerald H. I;: Gardner, Rice Univ. and Houston Advanced Research Center (HARC) SM3.2 Summary The organization of 3D multi-fold seismic data on a regular grid is commonly performed by binning the data in...
Proceedings Papers

Paper presented at the 1988 SEG Annual Meeting, October 30–November 3, 1988
Paper Number: SEG-1988-0049
... marine dmo reservoir characterization azimuth dmo dmo gradient constant velocity Model Studies of the Effects of Cable Feathering and DA 1.8 Acquisition Geometry on 3-D Marine DMO A. K Pieprzak and R A. Farmer, GECO Geophysical Co. Inc. r This report discusses and presents results of a detailed...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0293
...: Geophysics, 48. I-l I, Three-Dimensional Marine Seismic MAR 3.5 Data Acquisition Using Controlled Streamer Feathering Richard A. Cole. Che\wn USA; und William S. French, Tensor GYophysicul Service Corp. Marine three-dimensional (3-D) seismic surveys have tra- ditionally been recorded using closely spaced (25...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0449
... accidents and are reasons for burial incidents of continuous miners. To alleviate such feather-edging, the alternatives may be by use of Mobile breaker lines, longwall chocks and fully grouted bolted breaker lines at goaf-edges. This paper finds the last alternative as viable and practicable. The results...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0731
... feather angle annual international meeting sail line Repeatability analysis and reconstruction of towed streamer 4D seismic data Zhang Libin*, Zou Zhen , Cao Sheng , Ling Yun, BGP, CNPC Wu Tao, COSL, CNOOC Summary Compared to land 4D seismic surveys, reservoir monitoring based on marine towed...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, December 4–6, 2007
Paper Number: IPTC-11661-MS
...), OBS technology can be less expensive than WATS. Similarly, monitoring with time-lapse seismic surveys (4D) requires acquisition repeatability; OBS nodes deployed by ROVs provide better repeatability than streamers, which are subject to feathering due to currents. Indeed, although the limitations of...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-199
... part filled with air only, mixture of air and feathers under airtight and airtightless conditions, respectively. Simulation results suggest that, the scenario when flexible part is filled with mixture of air and feathers under airtight condition results in the best diving performance, free suspended...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 26–28, 2015
Paper Number: SPE-176590-MS
... well sections and their distribution in the interwell space. Some specific features of hydrocarbons and water distribution in rock were revealed. Main types of fractures (background and feathering) were determined. The method for determination and prediction of general background fractures was...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-3178
... feathering are the most challenging parts. To fill the missing near-offset, we can implement the near-offset extrapolation and combine the NAZ with WAZ data etc. Generally we have fine spatial sampling along the cable direction, but coarse spatial sampling between cables which is caused by the wide cable...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-0070
... coverage at a specified offset interval falls within a predetermined specification. In the presence of feather in the streamers, the vessel may be steered with separations from other vessel tracks which vary from the nominal separation in an attempt to minimize coverage holes; a strategy known as shooting...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8725-MS
... subsurface imaged information. However, during the acquisition stage, holes in the subsurface image distribution occur due to a variety of factors, cable feathering being the major cause. Cable feathering is a term used to indicate the deviation of cables due to currents (Fig 2). These holes require infill...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 12–15, 2018
Paper Number: SPE-192855-MS
... date has paved ways for future optimised and safer designs and float over method has added a feather in Cheleken area resulting in early completions of projects at reduced CAPEX. Sometimes Mega offshore structures reduce efforts on multiple lifts (float over installation efforts) however...
Journal Articles
Journal of Petroleum Technology 70 (03): 90–91.
Paper Number: SPE-0318-0090-JPT
Published: 01 March 2018
... offshore fields for some time. However, until recently, its application in the GOM had been limited, largely because the effects of the Loop Current and infrastructures make it difficult to repeat the feathering of streamers used in conventional 4D-seismic acquisition. The key for 4D success is to repeat...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17732956
... give an acceptable result within the conventional frequency bandwidth and far better results when considering the lower frequencies. However, we also observe that the current condition (feathering) and the sea state (swell noise) have impacted the results and the conclusions need to be mitigated with...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-157
... blades are feathered and put parallel to the wind direction. However, if the pitch mechanism fails, the blades cannot be feathered to the maximum pitch set point―the blades are seized. This will likely cause a large drag loading and increase the extreme response values. The study conditions on the 1-year...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16942-MS
... feathering. Inadequate spatial sampling causes aliasing artifacts. These can be reduced by f-k filtering at the expense of limiting the bandwidth in the predicted multiples. Source signature variations create artifacts in predicted multiples due to spatial discontinuities. Variations from a well-behaved...
Proceedings Papers

Paper presented at the SPE Health, Safety, Security, Environment, & Social Responsibility Conference - North America, April 18–20, 2017
Paper Number: SPE-184412-MS
... survey, the worst possible nightmare is to have any of the seismic survey vessel assets, in particular the streamer spread, collide with the client's installations. This type of collision can occur due to metocean changes and feathering, unpredicted changes in the profile of currents, and the onset of...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3802
... Summary Typically, most conventional marine 3D seismic surveys are acquired with infill to ensure adequate subsurface seismic reflection coverage in areas where seismic surveys may have been affected by adverse currents, sub-optimal streamer feather angle matching or source/streamer...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-1187
... course of the survey, strong loop currents in the order of 2-3 knots were encountered, causing severe feathering. Modeling work (Sirgue and Xia, 2008) during the survey showed no significant impact of the feathering on the migrated images, and provided the assurance to continue acquiring the survey...

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