Tel Aviv

Journal of Petroleum TechnologyMarch, 2015

Tel Aviv Section Receives Charter at Oil and Gas Conference

The Journal of Petroleum Technology, the Society of Petroleum Engineers' flagship magazine, presents authoritative briefs and features on technology advancements in exploration and production, oil and gas industry issues, and news about SPE and its members.

Journal of Petroleum Technology

gas Conference, tel aviv section receive charter, Upstream Oil & Gas

Country: Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.40)

Industry: Energy > Oil & Gas > Upstream (1.00)

Evaluation of Multicomponent Depth Migration

Neto, Guenther Schwedersky (UFBA) | Kosloff, Dan (Tel Aviv University)

OnePetroOctober, 1989

Brazi(; and Dan Koslof' Tel Aviv University, Israel S-The stress displacement relations are given by, This paper presents an evaluation of multi component depth migration. This type of migration can be carried out by most techniques commonly used for conventional single component acoustic migration. We demonstrate downward continuation by extensions of the phase shift method introduced by Gazdag (1978) and Bolodni et al. (1978)) as well as by the generalized phase shift method (Kosloff and Kessler, 1986). We then evaluate elastic reverse time migration where X and /.L are respectively the rigidity and the (Sun and McMechan, 1986, Chang and McMechan, shear modulus. Specifically we show that when the correct velocity is used reverse time migration is incapable of where UT (&, it*, Gu, szx) is the motion-stress reproducing correct amplitudes. Furthermore, use of the vector, and exact velocity and the free surface boundary condition creates false events in all methods.

SEG-1989-1320

1989 SEG Annual Meeting

Country: Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.25)

Geophysics: Geophysics > Seismic Surveying > Seismic Processing > Seismic Migration (1.00)

Industry: Energy > Oil & Gas > Upstream (1.00)

SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)

Gelchinsky, B. (Tel Aviv University) | Landa, E. (Institute for Petroleum Research and Geophysics, Israel) | Shtivelman, V. (Institute for Petroleum Research and Geophysics, Israel)

Complex Envelope And Procedures of Combined Group And Phase Correlation

B. Gelchinsb, Tel Aviv University; E. Landa and V. Am [Z-T&)]/? 2 ' Shtivelman, Institute for Petroleum Research and Geophysics, Israel In previous works by the authors, a procedure of phase and group correlation for analysis of wave fields in complex media was proposed. The procedure was based on analysis of trace envelopes and normalized seismograms (cosine of the phase). However, since this procedure implies that phase and group correlations are performed independently, in some cases difficulties in combined interpretation of results may arise. The method assumes that the seismic In expression (4), TJX) and T&X) are phase and group traveltimes, signal has a narrow band spectrum; such a signal can be respectively. The phase and group velocities are determined by represented as a sum of two products of slowly and rapidly varying the following expressions: time functions.

SEG-1986-0268

Country: Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.24)

Geophysics: Geophysics > Seismic Surveying (1.00)

Industry: Energy > Oil & Gas > Upstream (0.56)

SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)

de Faria, Eduardo Lopes (PPPG-UFBa and Petrobras) | Stoffa, Paul L. (Institute for Geophysics) | Loewenthal, Dan (PPPG-UFBa, Brazil and Univ. of Tel Aviv, Israel)

Migration Before Stack Using Reverse Time Propagation

Migration Before Stack Using POS 2.2 The first example tests the ability of the split-step Fourier Reverse time Propagation method to deal with lateral velocity variations. Paul L. Stoffa, Institute for Geophysics; and Dan Loewenthal, changes from VI to vz 1.9 vI in the horizontal direction. PPPG-UFBa, Brazil and Univ. of Tel Aviv, Israel timesection (Figure lb) was constructed using finite differences to model the acoustic propagation. Figure lc shows the result of TWO prestack finite-difference migration techniques are presented the split-step migration. Certain imperfections in the reconstruction, that map time domain (x-t) data to the depth domain e.g., the lack of energy at the ends of the semicircle, are (x-z).

SEG-1986-0257

Country:

South America > Brazil (0.49)
Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.24)

Geophysics: Geophysics > Seismic Surveying > Seismic Processing (1.00)

Industry: Energy > Oil & Gas > Upstream (1.00)

Oilfield Places: South America > Brazil > Bahia > Reconcavo Basin (0.99)

SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)

Technology: Information Technology (0.69)

Bayliss, A. (Exxon Research and Engineering Co.) | Turkel, E. (Tel Aviv University, Israel)

Fourth-Order Accurate Discretizations For Waves In Elastic And Poroelastic Media

A. Bayliss, Exxon Research Engineering Co.; and E. Turkel, (With deconvolution applied after stack) did not improve, and Tel Aviv University, Israel probably degraded, the horizontal resolution of the image (see We discuss a scheme for the computation of waves in an elastic Figure 5b). For comparison, Figure 5a shows the desired section-a medium. The scheme is fourth-order accurate in space and series of 1-D synthetic seismograms (primaries only) calculated second-order accurate in timeand is based on the first-order system for the same model. The stability and accuracy of 3b and 5b is primarily attributable to the failure of CMP stacking the scheme appears to be insensitive to the Poisson ratio. These data were stacked with scheme has been extended to cylindrical geometry and to Biot's velocities appropriate for the horizontal interfaces; the stack then system of equations for waves in a poroelastic medium.

SEG-1986-0629

Country: Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.24)

Geophysics: Geophysics > Seismic Surveying > Seismic Processing (1.00)

Industry: Energy > Oil & Gas > Upstream (1.00)

SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)

Shtivelman, V. (Institute for Petroleum Research and Geophysics) | Loewenthal, D. (Tel Aviv University, Israel)

Source Wavelet Estimation By Upward Extrapolation

In general, the strongest local mis-ties are attributable to uncorrected transmission anomalies. V. Shtivelman, Institute for Petroleum Research and Close examination of Figure 5 shows how well a given Geophysics; and D. Loewenthal, Tel Aviv University, Israel event ties in terms of arrival time amplitude, and wavelet character A new deterministic technique for wavelet estimation and deconvolution and how that effect is expressed as residual error displayed of seismic traces was recently introduced (Loewenthal on the right. This socalled In conclusion, it appears that although there is much variability impedance type technique was developed for a marine in the corresponding traces recorded by independent arrays there environment where both the source and receiver are located inside is also a high degree of continuity and with proper processing the a homogeneous layer of water. In this work, an extension of 1-D assumption can often reasonably be made for a specific target the theory of source wavelet estimation is proposed. Close analysis of line intersections enables an evaluation publications, this is based on extrapolation of the wave of the accuracy of estimation of target zone parameters before field measured at a depth upward to the free surface.

SEG-1986-0503

depth level, displacement field, equation, estimation, expression, free surface, FSS, interface, pressure field, receiver, reflection coefficient, Reservoir Characterization, sequence, source wavelet, Source wavelet estimation, Upstream Oil & Gas, upward extrapolation, wavelet, wavelet estimation

Country: Asia > Middle East > Israel > Tel Aviv District > Tel Aviv (0.24)

Geophysics: Geophysics > Seismic Surveying (1.00)

Industry: Energy > Oil & Gas > Upstream (1.00)

SPE Disciplines: Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)

High Order Finite-Difference Modeling And Reverse Time Migration

Loewenthal, D. (Federal Univ. of Bahia) | Wang, C.J. (AGL, Univ of Houston) | Johnson, O.G. (AGL, Univ of Houston)

OnePetroOctober, 1985

M., and Loewenthal, D., 1984, Elastic wave calculations quency dispersion is of a nature usually found in seismic work by the Fourier method: BSSA, 74, 875-89 1. and the essential properties of the field can still be observed. Marfurt, K. I., 1984, Accuracy of finite-difference and finite-element modeling of the scalar and elastic wave equations: Geophysics, 49, Migration, the inverse of modeling, traditionally has been done 533-549. However, Neves, K. W., 1983, Vector algorithms as a function of hardware architecture: extrapolation in depth is not always a stable process due to evanescent Presented by SIAM conference on parallel processing, Norfolk. However, efforts to apply this result to modeling problems, not to mention inverse problems, have yet to be published. High Order Finite-Difference Modeling s15.5 and Reverse time Migration Zero-offset stack modeling and migration methods D. Loewenthal, Federal Univ. of Bahia, Brazil, on leave from Our objective in this work is to treat the problems of modeling Tel-Aviv Univ., Israel; C. J. Wang and 0. G. Johnson, AGL, and migrating zero-offset stacked section (i.e., after stack processing) Univ. of Houston In modeling, we imitate the actual The treatment of the full acoustic wave equation by secondorder seismic field experiment and simulate it in the computer.