Acoustic imaging of reservoir structure from a horizontal well

Esmersoy, Cengiz; Chang, C.; Kane, M.; Coates, R.; Tichelaar, Bart W.; Quint, Edwin

doi:10.1190/1.1438075

Cited by 59 publications

(16 citation statements)

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“…Sonic reflection imaging, using an array-sonic logging tool and processing reflections or diffractions instead of direct arrivals, shows considerable promise for reservoir imaging. Esmersoy et al (1998) show an example of migrating data from Schlumberger's Dipole Shear Sonic Imager in a horizontal well to create both P-and S-wave sections. They concluded that reflectors at a range of 3 m were imaged, with the possibility of imaging up to 10 m.…”

Section: Figmentioning

confidence: 99%

Converted‐wave seismic exploration: Methods

Gaiser²,

et al. 2002

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Multicomponent seismic recording (measurement with vertical-and horizontal-component geophones and possibly a hydrophone or microphone) captures the seismic wavefield more completely than conventional single-element techniques. In the last several years, multicomponent surveying has developed rapidly, allowing creation of converted-wave or P-S images. These make use of downgoing P-waves that convert on reflection at their deepest point of penetration to upcoming S-waves. Survey design for acquiring P-S data is similar to that for P-waves, but must take into account subsurface V P /V S values and the asymmetric P-S ray path. P-S surveys use conventional sources, but require several times more recording channels per receiving location. Some special processes for P-S analysis include anisotropic rotations, S-wave receiver statics, asymmetric and anisotropic binning, nonhyperbolic velocity analysis and NMO correction, P-S to P-P time transformation, P-S dip moveout, prestack migration with two velocities and wavefields, and stacking velocity and reflectivity inversion for S-wave velocities.Current P-S sections are approaching (and in some cases exceeding) the quality of conventional P-P seismic data. Interpretation of P-S sections uses full elastic ray tracing, synthetic seismograms, correlation with P-wave sections, and depth migration. Development of the P-S method has taken about 20 years, but has now become commercially viable.

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Section: Figmentioning

confidence: 99%

Converted‐wave seismic exploration: Methods

Gaiser²,

et al. 2002

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“…Although acoustic reflection imaging tools are available for nearly a decade (Esmersoy et al, 1998;Tang, 2004;Pistre et al, 2005;Hirabayashi et al, 2010), some problems still exist. The most difficult one is to extract the very weak reflection from the dominant borehole-guided signal trains.…”

Section: Introductionmentioning

confidence: 97%

A method to determine the strike of interface outside of borehole by monopole borehole acoustic reflections

Wang

Tao²,

Shang

2015

Journal of Petroleum Science and Engineering

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“…In addition, the controllability of transducer radiation directivity is an emerging topic in acoustic logging technology. Current borehole acoustic reflection logging based on measurements from monopole and dipole acoustic tools cannot provide accurate azimuth information in the near-borehole formation structures owing to low azimuthal resolutions of measurements and multisolutions in the inversion of formation parameters (Hornby, 1989;Esmersoy et al, 1998;Tang, 2004;Tang et al, 2007;Tang and Patterson, 2009;Zhang et al, 2009). With the exploration and development of complex reservoirs, an urgent demand exists for acoustic logging technology with circumferential azimuth detection function.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the radiation characteristics of downhole acoustic phased combined arc array transmitter

Qiao

Che

et al. 2013

GEOPHYSICS

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A new kind of acoustic phased combined arc array transmitter with controllable directivity presented can be used in 3D acoustic image logging. The phased combined arc array is composed of numerous phased arc arrays placed equally along an axis. Each phased arc array contains several array elements arranged around a circumference. The phased combined arc array is considered as the combination of phased arc arrays and linear phased arrays. A directional radiation acoustic beam in the space is generated by simultaneously controlling the phase delay of excitation signals exerted on array elements located in the circumferential and axial directions. To investigate the radiation characteristics, an acoustic transmitter comprising four eight-element phased arc arrays was assembled to conduct physical simulation experiments in a water tank. Experimental results show that the main lobe width of the horizontal radiation energy narrows significantly by exerting phase delayed excitation signals on array elements of phased arc arrays. Adjusting the delay time of excitation signals applied on neighboring-phased arc arrays allows the main lobe direction of the vertical radiation energy to be steered and facilitates the change in the main lobe width of the vertical radiation energy. The phased combined arc array is characterized by controllable horizontal directivity, vertical directivity, and main lobe width of the radiated acoustic beam. More importantly, the acoustic phased combined arc array transmitter is applicable to 3D acoustic image logging, which is helpful in the enhancement of the reliability and accuracy of complex reservoir exploration.

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Acoustic imaging of reservoir structure from a horizontal well

Cited by 59 publications

References 0 publications

Converted‐wave seismic exploration: Methods

Converted‐wave seismic exploration: Methods

A method to determine the strike of interface outside of borehole by monopole borehole acoustic reflections

Experimental study on the radiation characteristics of downhole acoustic phased combined arc array transmitter

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