Comparison of two low-fold 3D geometries in Saudi Arabia

Geophysics ◽  
2007 ◽  
Vol 72 (5) ◽  
pp. A63-A67 ◽  
Author(s):  
Peter A. Crisi ◽  
Shelton E. Hubbell
Keyword(s):  
Saudi Arabia ◽  
Data Quality ◽  
Cost Effective ◽  
Seismic Survey ◽  
3D Seismic ◽  
Active Channels

Two different 3D seismic survey geometries for relatively low-fold exploration objectives are compared. The sparse geometry (S3D) is executed in swaths using a crew with 960 active channels. It is fast and cost effective, and has been used extensively in Saudi Arabia. The low fold conventional geometry (LFC3D) is acquired in blocks using a crew with about 4000 active channels. LFC3D geometries offer better geophysical attributes, with less variability of offsets and azimuths between common midpoints (CMPs), improved statics control, and higher fold with less source effort. LFC3D geometries have greater flexibility for different survey objectives than S3D geometries, and are competitive with S3D geometries in terms of cost, speed, and data quality.

A case history of a cost effective 3D seismic survey over the Perth Basin, Western Australia

1989 ◽  
Vol 20 (2) ◽  
pp. 229
Author(s):  
S.C. Stewart ◽  
B.J. Evans
Keyword(s):  
Western Australia ◽  
Three Dimensional ◽  
Cost Effective ◽  
Cost Comparison ◽  
Seismic Survey ◽  
3D Seismic ◽  
Seismic Surveying ◽  
History Of ◽  
The Cost ◽  
Funded Research Project

As part of an industry funded research project into the application of the technique of LOFOLD3D land seismic surveying, a four fold three dimensional seismic survey was performed in the Perth Basin at Moora, Western Australia in July 1987. The volume covered an area of four kilometres by just under two kilometres, producing a total of 23,000 common midpoint traces. The objective was to collect and process the data in such a manner that a three dimensional structural interpretation would result, which would be the same as that resulting from a conventional three dimensional survey. A cost comparison indicates that a commercial LOFOLD3D survey would reduce the cost of performing a land 3D survey to an estimated 20% of the full fold equivalent, and the technique therefore offers potential for substantial savings if it is adopted on a commercial basis.

The impact of energy distribution on data quality and cost of 3D seismic survey over Bu Hasa Onshore Field in Abu Dhabi, UAE

2000 ◽  
Author(s):  
Abu Baker Al Jeelani ◽  
Samer Marmash ◽  
Abdulsalam Bin Ishaq ◽  
Ahmad Al‐Shaikh ◽  
Erik Kleiss ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Data Quality ◽  
Seismic Survey ◽  
Abu Dhabi ◽  
3D Seismic ◽  
The Impact

scholarly journals Sparse 3D Seismic Imaging in the Kylylahti Mine Area, Eastern Finland: Comparison of Time Versus Depth Approach

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 305 ◽  
Author(s):  
Brij Singh ◽  
Michał Malinowski ◽  
Felix Hloušek ◽  
Emilia Koivisto ◽  
Suvi Heinonen ◽  
...  
Keyword(s):  
Mineral Exploration ◽  
Cost Effective ◽  
Seismic Survey ◽  
Source Distribution ◽  
3D Seismic ◽  
Mine Area ◽  
Standard Time ◽  
Active Source ◽  
Geophysical Imaging ◽  
Eastern Finland

A 10.5 km2 3D seismic survey was acquired over the Kylylahti mine area (Outokumpu mineral district, eastern Finland) as a part of the COGITO-MIN (COst-effective Geophysical Imaging Techniques for supporting Ongoing MINeral exploration in Europe) project, which aimed at the development of cost-effective geophysical imaging methods for mineral exploration. The cost-effectiveness in our case was related to the fact that an active-source 3D seismic survey was accomplished by using the receiver spread originally designed for a 3D passive survey. The 3D array recorded Vibroseis and dynamite shots from an active-source 2D seismic survey, from a vertical seismic profiling experiment survey, as well as some additional “random” Vibroseis and dynamite shots made to complement the 3D source distribution. The resulting 3D survey was characterized by irregular shooting geometry and relatively large receiver intervals (50 m). Using this dataset, we evaluate the effectiveness of the standard time-imaging approach (post-stack and pre-stack time migration) compared to depth imaging (standard and specialized Kirchhoff pre-stack depth migration, KPreSDM). Standard time-domain processing and imaging failed to convincingly portray the first ~1500 m of the subsurface, which was the primary interest of the survey. With a standard KPreSDM, we managed to obtain a good image of the base of the Kylylahti formation bordering the extent of the mineralization-hosting Outokumpu assemblage rocks, but otherwise the image was very noisy in the shallower section. The specialized KPreSDM approach (i.e., coherency-based Fresnel volume migration) resulted in a much cleaner image of the shallow, steeply dipping events, as well as some additional deeper reflectors, possibly representing repetition of the contact between the Outokumpu assemblage and the surrounding Kalevian metasediments at depth.

Preconditioning point-source/point-receiver high-density 3D seismic data for lacustrine shale characterization in a loess mountain area

2017 ◽  
Vol 5 (2) ◽  
pp. SF177-SF188 ◽  
Author(s):  
Wei Wang ◽  
Xiangzeng Wang ◽  
Hongliu Zeng ◽  
Quansheng Liang
Keyword(s):  
Data Quality ◽  
Seismic Data ◽  
Ordos Basin ◽  
Seismic Inversion ◽  
High Density ◽  
Seismic Survey ◽  
3D Seismic ◽  
Noise Characteristics ◽  
Lacustrine Shale ◽  
3D Seismic Data

In the study area, southeast of Ordos Basin in China, thick lacustrine shale/mudstone strata have been developed in the Triassic Yanchang Formation. Aiming to study these source/reservoir rocks, a 3D full-azimuth, high-density seismic survey was acquired. However, the surface in this region is covered by a thick loess layer, leading to seismic challenges such as complicated interferences and serious absorption of high frequencies. Despite a specially targeted seismic processing workflow, the prestack Kirchhoff time-migrated seismic data were still contaminated by severe noise, hindering seismic inversion and geologic interpretation. By taking account of the particular data quality and noise characteristics, we have developed a cascade workflow including three major methods to condition the poststack 3D seismic data. First, we removed the sticky coherent noise by a local pseudo [Formula: see text]-[Formula: see text]-[Formula: see text] Cadzow filtering. Then, we diminished the random noise by a structure-oriented filtering. Finally, we extended the frequency bandwidth with a spectral-balancing method based on the continuous wavelet transform. The data quality was improved after each of these steps through the proposed workflow. Compared with the original data, the conditioned final data show improved interpretability of the shale targets through geometric attribute analysis and depositional interpretation.

Sand curve facelift: Empirical to polynomial model and the effect on the tomogram

Geophysics ◽  
2017 ◽  
Vol 82 (3) ◽  
pp. U37-U48 ◽  
Author(s):  
Ralph Bridle
Keyword(s):  
Saudi Arabia ◽  
Seismic Survey ◽  
Theoretical Curve ◽  
3D Seismic ◽  
Near Surface ◽  
Direct Measurements ◽  
Curve Model ◽  
Variable Success ◽  
Static Corrections ◽  
The Relationship

An empirical thickness versus time relationship sand curve has been established in the Rub’ al-Khali desert and verified by a theoretical curve from the direct measurements of sand. The empirical sand curve has variable success in other areas of Saudi Arabia. We established a theoretical sand curve model to determine the single-way time in dry sand. Tomographic modeling of a higher resolution 3D seismic survey contributes more data to refine the relationship. Polynomial curves were used in the calculation of near-surface static corrections to improve the solution for low-relief structures.

ENVIRONMENTAL MANAGEMENT IN THE BASS STRAIT NORTHERN FIELDS 3D SEISMIC SURVEY

2003 ◽  
Vol 43 (1) ◽  
pp. 761
Author(s):  
S.H. Mustoe ◽  
M.C. Greenwood ◽  
J.F. Moore
Keyword(s):  
Best Practice ◽  
Cost Effective ◽  
Mitigation Strategies ◽  
Seismic Survey ◽  
3D Seismic ◽  
Seismic Surveys ◽  
Scallop Larvae ◽  
Spawning Periods ◽  
Large Survey

The Northern Fields 3D seismic survey in Bass Strait was a large survey of 4,000 km2, carried out between the months of October 2001 to July 2002. The program attracted interest from various groups regarding the possible impacts of the survey on fisheries and cetaceans (whales and dolphins).The survey was the first to operate in eastern Bass Strait after the Environment Australia Guidelines for Minimising Acoustic Disturbance to Whales, came into force, in September 2001.The Northern Fields program was conducted in accordance with a method statement for the mitigation of impacts to cetaceans, developed by Esso to meet the requirements of Australian environmental legislation and acknowledge environmental best practice. The program utilised teams of three whale watchers who maintained a continuous rotational watch of two observers throughout the day. This proved to be a reliable element of the program and was one of several key learnings that may assist other companies in developing comprehensive and cost-effective mitigation strategies for future surveys.Concerns raised by the fishing industry and some conservation groups about the potentially detrimental impact of seismic sources on commercial scallop larvae and fish populations were effectively addressed by avoiding commercial scallop areas during spawning periods. A controlled, in-situ study of scallops exposed to the acoustic source completed during the program conclusively demonstrated no significant variation in scallop mortality or muscle strength.Observation data collected during this survey provided a sample of the cetacean population in Eastern Bass Strait during a large part of the annual migration cycle. These observations, which may be relevant to the planning and execution of future seismic surveys in the region, are discussed. The findings also provide valuable information for continued research into the distribution and conservation of whales and dolphins in Bass Strait.

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