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Effective penetration of profiler sources

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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-23950-MS
.... For the AUV3Dm example survey described here, the 3-D survey area was about 390 x 500 meters, line spacing was 4 meters, and a 2 to 12 kHz Chirp SBP was the source. The resulting 3-D seismic volume has a bin spacing of 4 x 0.5 meters. Effective penetration below the seafloor was about 40 meters in this case...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215765
... a new approach that uses the cone penetration test (CPT) data acquired between the two boreholes to improve the bandwidth of the effective source wavelet by using wavenumber-amplified FWI models. A synthetic model is generated using a stochastic simulation based on measured parameters at Krauthausen...
Journal Articles
SPE Res Eval & Eng 4 (03): 221–230.
Paper Number: SPE-72098-PA
Published: 01 June 2001
... (such as distance, number, and type) based solely on the log-log derivative profile in rectangular and triangular wedge-shaped reservoirs should be strongly discouraged. Partial-penetration effects (PPE's) in wedge-shaped reservoirs are highly dependent on the wellbore location relative to the wedge, and the well...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-363
... performance of the MIG/MAG process in terms of penetration. The welding power source may be based on the more conventional mode of the process, i.e. in the voltage control mode (CV). However, what the source effectively has to meet is a certain dynamic response in order to sustain a metastable equilibrium...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-416
... To investigate the disturbance effects due to the penetration of FVP blade and the validity of the measured shear waves, comparison downhole and crosshole tests are carried out in the laboratory. Downhole test The downhole method consists of a source on the surface and the one or two receivers within the soil...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-008
... restricted that it becomes more economical to mount the profiler on an autonomous underwater vehicle. Either way, the survey would be expensive. Moreover, in depths of a kilometre or more, source energy levels are so restricted that the depth of subbottom penetration is limited to a few tens of metres...
Journal Articles
SPE Res Eng 6 (03): 343–352.
Paper Number: SPE-20127-PA
Published: 01 August 1991
.... Fig. 9 shows the effect of a water postflush on injectivities. Four cases are illus- trated. In all four cases, a water-like (Fr= 1) gelant was allowed to penetrate 50 ft [15.2 m] radially into the most-permeable layer. The gelant penetrated to some lesser radius in a given less-permeable layer...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215240
... of the source antenna. By having a lower frequency signal and therefore higher wavelength, the scattering doesn t occur as a sizeable effect as it does with a higher frequency signal. b. Seismic refraction Seismic refraction profiles were also acquired in the same two docks as the GPR data, at each trench...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 5–8, 2003
Paper Number: SPE-84574-MS
... ep th (k ft) D ep th (k ft) Fig. 2 Surface seismic profile showing structure, well location, and a survey design for a 3D salt proximity, an offset VSP, and a rig source velocity survey (left panel). Depth migration Images of the updip sediment reflectors and steep salt-sediment boundary (right panel...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17791251
... method to estimate the source wavelet of common-offset GPR data The effects of including/excluding the air/ground wave are studied on both synthetic and simple field test data involving a single buried pipe. For the 2D synthetic model, SBD extracts the wavelets. For the real field data, the estimated...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-1298
... Summary Because ground penetrating radar (GPR) attenuation is strongly dependent on effective conductivity, time-lapse changes in attenuation should be able to be used to map conductivity changes. We tested the validity and field practicality of using surface-based multi-offset reflection...
Proceedings Papers

Paper presented at the 1993 SEG Annual Meeting, September 26–30, 1993
Paper Number: SEG-1993-0013
... using a geophone array as receivers showed results consistent with the results using hydrophone receivers. CONCLUSIONS A single-well profiling tool configured with a gas-filled tube-wave damper probe effectively radiates broad-band P-wave energy around 700 Hz, and is capable of penetrating more than...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 16–19, 1984
Paper Number: SPE-13260-MS
... rate. Furthermore, the effect of bit design parameters on the temperature in the PDCs during drilling can be studied with this model to enable optimum design of PDC bits with regard to wear distribution. In Section 1 the heat sources considered in the model are outlined. In Section 2 these heat...
Journal Articles
SPE Drill & Compl 12 (01): 13–18.
Paper Number: SPE-29275-PA
Published: 01 March 1997
... of profile control was proposed by Small. The idea was that a small charge would blow a smaller hole through the casing. Thus, by charge variation, down hole chokes with specified sizes may be made in-situ. The paper did not discuss the precision of hole size control by charge variation, neither the effect...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-1303
... successfully obtain the variation of the volumetric soil water content from the reconstructed permittivity profiles in the vadose zone. Introduction Ground-penetrating radar (GPR) has been applied to a wide range of disciplines, such as archeology, mining, and hydrology (e.g., Reynolds, 1997...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1340-MS
... in order to reduce the signal degrading effects of bubble sweepdown, ship roll angle and ship noise. penetration pipe transducer transducer source high frequency offshore use north sea transducer array information operation frequency range reservoir characterization frequency...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 19–22, 2010
Paper Number: SPE-134324-MS
... temperature and temperature profile (along AA section*) for each scenario. Thereafter the main output information is presented for each scenario Scenario 1 The model gives a depth of penetration of 10 m with a maximum temperature of 177°C declining to 80°C at a distance of 5 m from the source...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0441
... and non-linear effects. A way to approach the problem to de- termine the seismic emission of the bit source is to intro- duce a model of impedances at the drill bit (Poletto and Miranda, 2004). These equations are obtained with sim- plified assumptions and no-rate of penetration. The dis- placement...
Proceedings Papers

Paper presented at the SPE Canada Heavy Oil Conference, September 28–October 2, 2020
Paper Number: SPE-199910-MS
..., because this frequency can produce the resonance effect of water ( Kovaleva et al., 2010 ). However, such strict control of source frequency may not be necessary in field applications. (2) E = H j ω μ σ + j ω ε By the method of FDFD (Finite Difference Frequency Domain...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, May 21–22, 2001
Paper Number: SPE-68979-MS
... technology gives us the opportunity to counteract these effects by imposing an appropriate pressure or flow rate profile along the injection and production wells. In the current study we focus on water flooding with fully penetrating, smart, horizontal wells in 2 dimensional, horizontal reservoirs...

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