... this limit, the casing signal is smaller than the collar signal and the amplitude method loses sensitivity to bonding. This practical challenge in the LWD realm was overcome through the inclusion of attenuation rate measurements, which responds accordingly in higher bonding environments. The two methods...

... flexural measurement tool mechanical caliper tool thickness interface echo tie response geometry outer casing geometry offshore technology conference deformation interface attenuation receiver evaluation tie data wellbore view Introduction An advanced cement and casing evaluation...

... acoustic waves and compute the acoustic energy propagating through the casing, the cement and the formation. The amplitude and the attenuation of the returned wave can be correlated with Bond Index (BI), due to the difference in acoustic impedance between casing and cement. Over years, different wireline...

... the casing. Attenuation of these waves is used to derive cement compressive strength or acoustic impedance bonded to the casing. Some of the long lasting fundamental limitations faced by the current technology are: 1. The wellbore must be filled with liquid for the compressional wave to be able to travel...

... mode technologies, which in combination, allow evaluation of the cement as well as casing centralization. The quality of these measurements are challenged by higher attenuation caused by heavy muds and thick casings that reduced sensitivity to the cement. This issue too, has been addressed with new...

... acquisition attenuation Asrilhant , B. ; and Beyda , T. T. 2015 . Understanding Complexity and Uncertainty in E&P Mega Projects: The Need for a New Managerial Approach . Presented at the Offshore Technology Conference , Rio de Janeiro , 27-29, October . OTC-26140-MS . http...

... advantages to using MPFM diagnostics are: The technology is already being developed for the detection of scale and the triple-energy gamma-ray attenuation technique has also been used to detect the presence of sand and other components which have a higher molecular weight than the flowing fluids...

... ground motion input offshore technology conference upstream oil & gas prediction excitation analytical prediction reservoir characterization earthquake step wave centrifuge measurement ground motion radiation attenuation American Petroleum Institute (2011) , Geotechnical...

.... This data processing involves two steps: 1) estimate the amount of seismic attenuation that a gas-bearing layer creates, and 2) fit a wave attenuation model to the observed attenuation. We accomplish the first step using a wavelet- based spectral ratio approach, and find the seismic quality factor...

... Abstract Noise attenuation is one of the most important steps in seismic data processing and it directly affects the final imaging quality of seismic data. Traditional de-noising methods can easily eliminate simple noise, such as spike noise or linear noise, but they can't efficiently handle...

... Abstract Seismic waves propagating in the earth are affected by attenuation. Attenuation is the progressive loss of energy with each cycle of the wave. The resulting seismic data has a frequency and time dependent loss of amplitude and a phase rotation of the wavelet. Traditionally attenuation...

..., if not impossible to remove completely in data processing. The current use of air-gun sub-arrays are mainly designed to attenuate bubble oscillation and are ineffective in reducing source-generated interference resulting from geological complexities located above the exploration objectives. Although end-fire...

... solution triangle evaluation attenuation composition concentration exhibition wlr energy level rate measurement reservoir surveillance upstream oil & gas fraction attenuation coefficient phasewatcher triangle OTC 19152 Evaluation of PhaseWatcher Multiphase Flow Meter (MPFM...

... permeability attenuation tube wave production control sand screen washpipe real time system perforation open screen scenario upstream oil & gas log analysis noise gravel sand impairment well logging sensor experiment real-time completion reservoir surveillance production...

... Abstract For seismic reservoir monitoring, interference noise from other seismic operations can cause either delays in data acquisition due to timesharing, or additional efforts to attenuate the seismic interference (SI) during processing. Here we present a method which takes advantage...

... the crest of the structures, especially in the vicinity of the mud volcanoes, to the extent that accurate structural mapping over the crest has been seriously impaired. (Fig. 2) The cause of the poor data has been postulated as a combination of a number of factors: P-wave absorption/attenuation through...

... eld conductivity csem data transmitter attenuation otc 17168 exploration electric eld upstream oil & gas resistivity frequency mt data reservoir characterization sea oor hoversten magnetic eld inversion geophysics offshore technology conference hydrocarbon exploration...

... seismic data reservoir property otc 16397 porosity information high resolution seismic study impedance poisson reservoir characterization processing sequence upstream oil & gas water saturation lankahuasa-1 well attenuation resolution westerngeco inversion interpretation...

... of problems, no single tool can attenuate all the multiples, but rather a sequence of tools: Surface Related Multiple Elimination (SRME), High Resolution Radon (HR Radon), and Diffracted Multiple Attenuation (DIMAT). This sequence can be easily extended to data with medium water depth. Introduction...

.... The abstract must contain conspicuous acknowledgment of where and by whom the paper was presented. Abstract Fibreoptic sensors are being increasingly used in wells with dry wellheads. However, for subsea wells some challenges remain to be overcome. These are e.g.: - Low allowed attenuation - Connector designs...