The effects of marine currents on seismic data

Gary Hampson

International Meeting for Applied Geoscience and Energy (IMAGE)

... side is u w z / v where z is the water depth. The apparent velocity asymmetry asymptotes to  v  u w . Two approaches have been proposed...

Velocity Logging and Its Geological and Geophysical Applications

H. R. Breck, S. W. Schoellhorn, R. B. Baum

AAPG Bulletin

...------------------------------ formation exerts great influence on the apparent velocity through the formation. Velocity logs showing geologic correlations...

Geophysical Investigation of Crystalline Basement Between Dead Sea Rift and Mediterranean Sea

A. Ginzburg , Y. Folkman

AAPG Bulletin

... on the Mediterranean shot. This velocity V4 = 9.2 km sec-1 is probably the updip apparent velocity of the 8.0 km sec-1 velocity computed for the upper mantle...

The Renaissance of Gravity, B.S. Anderson, M.E. Weber, J.E. Bain #40035

Search and Discovery.com

Some Applications and Problems of the Seismic Refraction Technique in Civil Engineering Projects in Malaysia

B. K. Lim, S. J. Jones

Geological Society of Malaysia (GSM)

... topographic features like the top of the hill, ridges and valleys. As illustrated in Fig. 9 and 10, such changes are sufficient to cause apparent velocity...

Hydraulic Fracture Monitoring Using Distributed Acoustic Sensing: A Case Study Using Dip-in Fiber

Chaoyi Wang, Yuanyuan Ma, David Eaton, Kelly MacDougall, Carolyn Furlong

Unconventional Resources Technology Conference (URTEC)

... characterized by linear moveout and apparent velocity of ~ 950 m/s. The background colors indicate longitudinal strain (e) along the fiber. URTeC 3723692...

Seismic Refraction and Reflection Studies in the Timor-Aru Trough System and Australian Continental Shelf: Convergent Margins

R. S. Jacobson , G. G. Shor Jr. , R. M. Kieckhefer , G. M. Purdy

AAPG Special Volumes

... cases, high-amplitude mantle reflections were observed with travel-time curves that asymptotical y approached an apparent velocity of approximately...

Seismic Prospecting for Gas-hydrate and Associated Free-gas Prospects in the Milne Point Area of Northern Alaska

T. L. Inks, M. W. Lee, W. F. Agena, D. J. Taylor, T. S. Collett, M. V. Zyrianova R. B. Hunter

AAPG Special Volumes

... by BP and must be kept in mind for any depth conversion done at a later date because it affects the apparent velocity of the shallowest...

Structure of Argentine Continental Margin

William J. Ludwig , John I. Ewing , Maurice Ewing

AAPG Bulletin

... upon the surface of the layer at an angle ^agr with the normal, has an apparent velocity V/sin ^agr along the surface. 4. Any travel-time...

Image - Rays and the Treatment of Inhomogeneity in Migration

L. Hatton

Southeast Asia Petroleum Exploration Society (SEAPEX)

... migration of complex offshore seismic profiles: paper presented at 10th Annual O.T.C., Houston. Levin, F.K., 1971, Apparent velocity from dipping interface...

Formation Porosity and Fluid Content from Velocity Logs

E. R. Denton

CSPG Bulletin

.... These conclusions have become apparent after reviewing velocity logs from more than one hundred Canadian wells. Most operators agree that they cannot...

Three-Dimensional Seismic-Reflection Techniques

Hermann Buchholtz

Circum Pacific Council Publications

... of the method is based on remarkable new developments that are made at all three stages: Levin, F.K., 1971, Apparent velocity from dipping interface...

Fundamental 3-D Seismic Survey Design

Stuart Wright

Rocky Mountain Association of Geologists

... growth in fluvial reservoirs, Stratton Field, South Texas: Gas Research Institute Topical Report GRI-93/0187. Levin, F.K., 1971, Apparent velocity from...

Upper Crustal Structure Derived from Seismic Refraction Experiments: Grand Banks of Eastern Canada

I. Reid, C.E. Keen

CSPG Bulletin

... reflection data could not be used to make static corrections for the basement travel times. The low apparent velocity of the first arrivals beyond about...

Seismic Characterization of a "Compound Tectonic Wedge" Beneath the Rocky Mountain Foreland Basin, Alberta

Donald C. Lawton, Chakrit Sukaramongkol,, Deborah A. Spratt

CSPG Bulletin

... Survey of Canada, p. 109-116. Levin, F.K. 1971. Apparent velocity from dipping interface reflections. Geophysics, v. 36, p. 510-516. Mack, G.H....

Structure Beneath Continental Shelf, Northeastern Gulf of Mexico

John W. Antoine , James L. Harding

AAPG Bulletin

... are not apparent on the eastern profiles of the cross section. One will also note the appearance of a deeper layer having an average velocity of 4.15 km...

Abstract: Joint OBN and 3-D DAS-VSP Data Acquisition and Processing in East China Sea; #91204 (2023)

Gang Yu1, Haibo Liu, Zhonglin Cao, Junjian Li, Jianguo Li, Yuanzhong Chen, Guangming He, Junjun Wu, Ximing Wang

Search and Discovery.com

..., the cable ringing noise is strong. From Figure 3(a), the apparent velocity of ringing noise is close to the effective signal in the time domain...

Geology, Evolution, and Mineral Potential of the Juan de Fuca Ridge

Janet L. Morton, William R. Normark, Dennis M. Mann; Donald H. Tompkins

Circum Pacific Council Publications

... the velocity of the overlying material. A low apparent velocity (i.e., near a water velocity of 1490 m/sec) would suggest that event B represented...

The Innisfail Oil Field - A Case History

R. J. White, W. W. Charles

CSPG Special Publications

... interpretation based on the gradient in velocity through the Tertiary and the Upper Cretaceous sediments. It is readily apparent that the velocity...

Some Relations Among Sedimentation, Stratigraphy, and Seismic Exploration

W. C. Krumbein

AAPG Bulletin

..., as Hafner (1940) and others showed. Swan (1942) prepared a series of contour maps representing apparent velocity variation to a time datum in several...

Seismic Reflection Measurements of Northwest Australian Margin and Adjacent Deeps

J. J. Veevers , D. A. Falvey , L. V. Hawkins , W. J. Ludwig

AAPG Bulletin

... recorded at long distances from the buoys. Apparent velocity and intercept time were read from the records and corrected for variation of ship's speed...

Geophysical Observations on Northern Part of Georges Bank and Adjacent Basins of Gulf of Maine

R. N. Oldale , J. C. Hathaway , W. P. Dillon , J. D. Hendricks , J. M. Robb

AAPG Bulletin

... be used with caution, as they are apparent values only, being measured in one direction only. Velocity values of 1.5-1.8 km/sec are inferred...

Presence of Preferential Flow Paths in Shallow Groundwater Systems as Indicated by Tracer Experiments and Geophysical Surveys

Murray E. Close, David C. Nobes, Liping Pang

Special Publications of SEPM

... subsurface layering was apparent in the velocity analysis. An average velocity is also used to migrate the profiles, which collapses subsurface...

Why Hydrate-linked Velocity-amplitude Anomaly Structures are Common in the Bering Sea Basin: A Hypothesis

David W. Scholl, Ginger A. Barth, Jonathan R. Childs

AAPG Special Volumes

...) seismic recordings of conspicuously apparent velocity-amplitude anomalies. The VAMP structures were first noticed in the late 1960s and early 1970s...

Seismic-Refraction Study of Continental Margin East of Florida

R. E. Sheridan , C. L. Drake , J. E. Nafe , J. Hennion

AAPG Bulletin

... layers are constant both horizontally and vertically. 2. The interfaces may be sloping but have plane boundaries. 3. The apparent velocity, Va...