Posts Tagged Seismic

Seismic Exploration for Minerals

Posted by on Thursday, 20 February, 2014
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Seminar to honour Professor Emeritus Tadeusz Ulrych

Posted by on Thursday, 1 August, 2013

A seminar to honour Professor Emeritus Tadeusz Ulrych will be held in Vancouver, B.C. on Thursday September 5, 2013. It will be a day of invited talks on a range of topics related to signal processing and geophysics in honour of our friend and teacher, Tad.

Date: Thursday September 5, 2013
Venue: University Golf Club Vancouver, BC
Presentations and lunch: 9:00 a.m. – 5:00 p.m.
Reception: 5:00-7:00 p.m.

Speakers from international academia and industry include:

  • Evgeny Landa, “Beyond conventional …”
  • Scott Leaney, “From scale space to anisotropic moment tensors, punctuated with portraits”
  • Toshifumi Matsuoka, “TBA” =
  • Jaymie Matthews, “Asteroseismology: Stealing the geoseismologists’ guide book and launching it into space “
  • Brian Russell, “Instantaneous anything“
  • Mauricio Sacchi, “Sparsity and Nuclear Norm Regularization for Multidimensional (5D) Seismic Data Processing “
  • Michael Slawinski, “Monte-Carlo analysis of Frobenius-norm effective elasticity tensors”
  • Stewart Trickett, “Robust rank-reduction filtering for erratic noise”
  • Danilo Velis, “Very fast simulated annealing for the automatic detection of microseisms”
  • Arthur Weiglein, “Tad Ulrych: the inspiration behind inverse scattering group therapy and seismic psychoanalysis”
  • Iain Weir-Jones, “TBA”

Details


Practical Inversion for Geoscientists

Posted by on Wednesday, 10 April, 2013

A short course on the why, how, and what of geophysical inversion

Presented by the B.C. Geophysical Society

This is a 2-day workshop consisting of 1 day of lectures (April 24th) followed by a 1 day hands-on workshop (either April 25th or 26th). Delegates can register for just the lectures or both the lectures and workshop.

Registration available until April 15th at: www.bcgsonline.org

Date: April 24th – 26th 2013

Address: SFU Downtown Campus; Vancouver BC

Registration: Registration is now open!  Please fill out attached pdf form (link below) and click submit.  Registration will be complete once payment is made via Paypal link.  Delegates are asked to choose one workshop day among April 25th or 26th.

Day 1 – Introduction to inversion
– Introduction to inversion in exploration

Reasons for doing inversion
Range of inversion options: magnetics, gravity, EM, IP-resistivity, seismic
Fitting geology and data

– Background on inversion

Unconstrained/constrained
Joint and collaborative
The future of inversion

– Before inversion – forward modeling

forward modeling
petrophysics drives the story
complexity vs. adequacy

– Case studies

Potential fields
EM
IP-resistivity

Day 2 – Workshop with Case studies
Multi-disciplinary teams will use geological, geophysical and geochemical data from two deposits (Babine Lake porphyry Cu-Mo, BC and Minto Cu, YK) to develop exploration targets. Teams will present their evaluations of the data to stimulate group discussion.

Inversion results for the available geophysical surveys will be presented to demonstrate state-of-the-art technology and best practices.
Sponsors for the short course are currently being solicited. Please contact Victoria Sterritt at Victoria.Sterritt@teck.com for details. Proceeds go to the KEGS Foundation.
For those interested in more information about the short course, please email info@bcgsonline.org


“Peter Duncan to Be Honored at Geophysical Society Spring Symposium”

Posted by on Sunday, 10 February, 2013

MicroSeismic, Inc. announced that Peter Duncan, Ph.D. will be honored for a lifetime achievement in geophysics at the Geophysical Society of Houston (GSH) and Society of Exploration Geophysicists (SEG) 2013 Spring Symposium on March 5 and 6. As part of the symposium, Peter will host a Challenge Bowl on March 5 and will be the guest of honor at the March 6 banquet toasting and roasting him.

“I am extremely surprised and grateful to receive this prestigious honor and join a group of honorees for whom I have deep admiration,” stated Peter Duncan, Ph.D., Founder and CEO of MicroSeismic. “I have dedicated my life to the study of geophysics and the advancement of that field of work; to be honored by these two organizations means the world to me.”

Peter is an active volunteer with many organizations including GSH and SEG. He chaired GSH’s Continuing Education Committee for two years and SEG’s Continuing Education Committee for three years. In the late 1990’s, he was responsible for creating the SEG Distinguished Instructor Short Course format. Peter served as the SEG President in 2003 and in the fall of 2008, he was the SEG/AAPG Distinguished Lecturer and spoke on the subject of passive seismic at 45 venues around the world. His most treasured accomplishment with SEG is the development of the successful Challenge Bowl where he continues to be its biggest promoter and host. Challenge Bowl events are held annually around the world, with local and regional eliminations leading to a world championship at the SEG Annual Meeting.

For registration and details of event visit http://www.gshtx.org/en/cev/932.


About Seismic Interpretation

Posted by on Sunday, 9 December, 2012

Robin Westerman : “Absolute BME: Quantitative Seismic Interpretation”

Roxar Software: “RMS 2012 – Seismic Inversion and Attributes”



Geoscience Australia: update on geophysical data

Posted by on Friday, 7 September, 2012

Update on geophysical data releases

Geoscience Australia will be managing the data acquisition program in New South Wales, Queensland, Western Australia and the Northern Territory.

The current status of Geoscience Australia’s geophysical survey data acquisition is available in a comprehensive table.

Minerals Alert Geophysical Surveys Table – survey boundary polygons in MapInfo TAB format.

Seismic and magnetotelluric data released for Youanmi Survey in Western Australia

The Youanmi deep crustal seismic survey was acquired in 2010 and extends nearly 700 kilometres over the Youanmi Terrane and Eastern Goldfields Superterrane of the Yilgarn Craton. This project was a collaboration between Geoscience Australia and the Geological Survey of Western Australia (GSWA). Funding was provided from the Western Australian Government’s Exploration Incentive Scheme, and Geoscience Australia’s Onshore Energy Security Program. The survey consists of three traverses with a total length of 695 kilometres. These seismic, magnetotelluric and gravity data aim to image the northern Yilgarn Craton from its north-western margin to the Ida Fault, near Leinster.

These data combined with the 2001 Northern Yilgarn and the 2010 Capricorn deep crustal reflection surveys result in a complete section across the northern Yilgarn Craton.

The processed SEG Y data, TIFF images, location information, magnetotelluric and gravity data are available and can be downloaded from the Seismic Acquisition and Processing project.

Interpretations of the seismic sections and magnetotelluric models undertaken by GSWA and Geoscience Australia geologists will be released in February 2013 at a public workshop in Perth.


SEG Continuing Education Courses

Posted by on Sunday, 18 December, 2011

Houston, TX 23-26 January 2012

Seismic Data Acquisition
Seismic Data Processing

Seismic Data Interpretation

Potential Fields/Non-Seismic

Near-Surface Geophysics

Exploration & Production Geophysics


Seismic data for Capricorn Survey, Western Australia

Posted by on Thursday, 1 December, 2011

The Capricorn deep crustal seismic survey was acquired in 2010 and extends from the Pilbara Craton, acrosss the Capricorn Orogen, to the Yilgarn Craton in Western Australia. This survey was a collaborative project between AuScope, Geological Survey of Western Australia (GSWA) and Geoscience Australia. Funding came from AuScope Earth Imaging, Western Australia’s Exploration Incentive Scheme, which is funded under the Western Australian Royalties for Regoins program, and Geoscience Australia’s Onshore Energy Security Program.

The survey consists of three traverses with a total length of 581 kilometres. These seismic and gravity data aim to image the extent of the Archean crust beneath the Capricorn Orogeny and identify the relationship between the Pilbara Craton and the Yilgarn Craton.

The interpreted processed seismic data were released on 23 November at a Public Presentation Workshop in Perth, which was hosted by the GSWA. The data is available as a free download.

A preliminary edition of the workshop proceedings will be available shortly on the GSWA website.

For more information please contact Tanya Fomin, Section Leader Seismic Acquisition and Processing, phone +61 2 6249 9725 or email tanya.fomin@ga.gov.au.


Ground/airborne geophysics evaluation for uranium mineralization

Posted by on Thursday, 1 December, 2011

Unity Energy Corp. announces that it has completed evaluation of ground/airborne geophysics and historical drilling in and around the Lampin Lake Project and has identified a high value target, dubbed the Shamus Zone. The Lampin Lake Project consists of a single 500ha disposition located on the eastern margin of the Athabasca basin. The Project lies in the Waterbury Lake district, ~16km southeast of Hathor’s Roughrider discovery. It is bordered by claims held by UEX to the east (Hidden Bay Project) and Cameco on all other sides.

To view the map associated with this press release, please click on the following link: http://media3.marketwire.com/docs/u1129.jpg

 

The Shamus Zone is characterized by a 500-750m wide northwest trending Bouguer Gravity low feature, beginning at Cameco’s Q12A zone and ending several kilometers on the southwest corner of the Lampin Lake claim boundary. The gravity anomaly is roughly perpendicular to the Telephone Fault, may indicate a region of alteration, some of which has been subject to desilicification. The Telephone fault is interpreted as the primary control of this zone. Within gravity anomaly, the primary target is a series of subtle conductors coincident with magnetic lows, which appear to be related to extensions of Cameco’s Q12A conductor series. The subtle conductors were identified through detailed interpretation of VTEM data, acquired by Unity in a survey completed in 2011.

Cameco’s Q12A zone (some 500m to the south) shows areas of intermittent uranium mineralization at the unconformity and has been interpreted as the outlying edge of an alteration zone. Cameco and Asamara Oil have tested the Q12A zone with several ground geophysical surveys and extensive diamond drilling. Asmara Oil’s diamond drilling of the Q12A grid intersected notable uranium mineralization as follows: Q12A-009 (4.0m of 0.13% U3O8 @ 197m), Q12A-003 (0.4m 3159ppm U3O8 @ 219.9m) and Q12A-005 (0.3m 0.073% U3O8 @ 180.1m), The most significant hole reported by Cameco was Q12A-011: 1.7m of 2.46% U3O8 at ~192m.

It is the Company’s exploration hypothesis that the absence of strong conductors near or at the Telephone Fault may be a result of graphitic consumption or remobilization by alteration events. Several major uranium discoveries in the Athabasca Basin such as McArthur River, Key Lake and Millennium were primarily the result of drill-testing of strong alteration zones related to conductor features, not the drill testing of specific graphitic conductors. The Key Lake and Millennium deposits, which were initially missed in first-pass drilling, were discovered by step-out fenced holes drilled across alteration zones. Millennium was discovered by drilling “off conductor” and deeper into a basement alteration system. McArthur River was found by drilling along the strike-trend of a pronounced alteration system where conductors were largely absent. The Company is in the process of evaluating “next step” exploration phases. A ground survey (such as gravity, resistivity or 2D seismic) would likely precede diamond drilling.

 

Anita Algie BSc. Hon., President, commented, “Unity now has high value targets on both of its Waterbury Lake assets: Lampin Lake and Waterbury Lake. It is the Company’s intention to explore and develop these highly prospective properties, with or without venture partners. In addition, the recent bidding war for Hathor by Cameco and Rio Tinto has reaffirmed in the minds of investors worldwide the viability of uranium as an exploration commodity. This may well be the black swan event that renews the uranium renaissance.”

Dr. Peter Born, P.Geo., the Company’s Qualified Person and Director, has not reviewed the original drill logs, assays or core of historic drilling. Geological and exploration information contained in this release is derived from sources believed to be credible.

 


Seismic Interpretation Toolkits

Posted by on Thursday, 22 September, 2011

TerraSpark® Geosciences LLC has announced the launch of its first series of highly-anticipated seismic interpretation toolkits. The toolkits were unveiled on the first day of the SEG Annual Meeting in San Antonio. TerraSpark (Booth 3208) is featuring scheduled product demonstrations of each toolkit during the conference.

These toolkits are specifically designed to enable interpreters and explorationists to solve today’s most demanding and resource-intensive seismic interpretation problems. Each toolkit can be modified to accomplish any interpretation task, taking advantage of any or all capabilities of TerraSpark’s flagship software platform, Insight Earth®.

“For decades, seismic interpreters have struggled to find newer, better ways to engage the most pressing geophysical and geological interpretation problems,” notes TerraSpark CEO Geoffrey Dorn. “These toolkits represent a new trend in 3D seismic interpretation, one that lies with developing well targeted, specifically-designed interpretation platforms that address these uniquely difficult exploration challenges, with the end result being better interpretation outputs, more effective workflows, and superior business decision making.”

The toolkits include the following:
Shale Resource Play Toolkit™
Complex Structure Toolkit™
Salt Velocity Modeling Toolkit™

Shale Resource Play Toolkit
The Shale Resource Play Toolkit helps users locate areas of enhanced fracture density and optimize the well path for maximum production. By mapping micro-seismic data together with seismic and well data, the toolkit helps to identify facies-change boundaries and reduce drilling risk.

Complex Structure Toolkit
TerraSpark’s Complex Structure Toolkit helps users overcome inaccurate and incomplete fault interpretation, especially in complex, highly faulted regions. The toolkit helps to identify and accurately interpret complicated structural environments and ultimately avoid dry holes, missed opportunities and diminished revenue.

Salt Velocity Modeling Toolkit
The Salt Velocity Modeling Toolkit helps interpreters quickly create a closed three-dimensional (3D) geobody, even in the most poorly imaged areas. Users can also create a mask volume without having to export to a separate velocity modeling package, reducing interpretation and model building time.

The toolkits are powered by TerraSpark’s Insight Earth proprietary tools and technologies, including Domain Transformation™, Automated Fault Extraction™ and Surface Wrapping™. To learn more, visit www.terraspark.com/toolkits/.


2D seismic program in Kenya

Posted by on Thursday, 15 September, 2011

Vanoil Energy Ltd. announces it has completed its 2011 2D seismic program on Block 3B in Kenya. Vanoil’s 100% owned Blocks 3A and 3B in Kenya cover approximately 24,000 square kilometres and are part of the vastly under-explored prolific Cretaceous Central African Rift Basin System in Kenya.

Vanoil’s 2011 seismic program in Block 3B covered approximately 398 line-km and was completed on budget and schedule. The program was designed to cover several leads previously identified on the re-processed 1975 Chevron and the 2010 Vanoil seismic data in Block 3B. The 2011 seismic data is high quality with location, time and amplitude content having been jointly assessed and controlled by the contractors; Bureau Geophysical Prospecting [BGP] and RPS. This premium data has been gathered to further image some specific structural leads and as a reconnaissance programme to identify more new leads in Block 3B. In addition, the 2011 seismic program was also designed to enable Vanoil to improve on the geologic model in the Lamu Basin, one of the three basins identified on the Vanoil Blocks.

The 2011 2D seismic program in Block 3B consisted of 398 kilometres of additional seismic bringing the cumulative total to 845 kilometres of 2D seismic coverage completed by Vanoil to date on Blocks 3A and 3B in 2010/2011.

The 2011 Vanoil 2D seismic programme data will now be sent to Statcom in Calgary Alberta for processing, following which, the data will be interpreted and integrated with the reprocessed and interpreted 1975 Chevron and 2010 Vanoil data. With the newly acquired data, the Company expects to add significantly to the resource assessment incorporated in the previously announced Sproule 51 101 report.

Geology

Most of the Block 3B acreage is located in the Lamu Embayment with a small portion of the block to the northwest probably in the Anza basin. It is also possible that a small area of Block 3B to the northeast is located in the Mochesa basin. The Lamu Embayment basin was initiated in the Karroo [Permo-Triassic] times during which an intra-cratonic, tri-radial rifts system developed in East Kenya. This development of the triple junction rifts system heralded the emergence of proto Indian Ocean and culminated in the failure of one of the rift branch which today constitutes the onshore Lamu Embayment basin. The failed Karroo rift extends to the Block 3B acreage. During the subsequent basin-fill in Block 3B the Karroo sequences have been buried thousands of meters below the oil window. During the Jurassic period, Block 3B area experienced marine transgression into the initial Karroo rift-graben which was accompanied by the deposition of mainly marine carbonates and minor shales under platform depositional systems. Faulting in Block 3B continued to Late Mesozoic and Lower Tertiary with emerging rift depo-centers being filled primarily by sediments deposited under fluvial-lacustrine, deltaic and marine depositional systems. The eastern portion of the Block 3B acreage was under marine influence in Middle Cretaceous during which potential source rocks shales and marine carbonates were deposited. During the lower Tertiary, non-marine continental depositional systems were extensive and similar throughout the Block 3B acreage. In the Upper Tertiary however, the southeastern portion of the Block 3B was under marine transgression that resulted in the deposition of Lower to Middle Miocene marine reefal carbonates, sands and shales. The marine transgression barely reached the Anza graben in the Block 3A. In Block 3B, the Lower-Middle Miocene marine sequence is capped by Pliocene to Quaternary coarse fluvial deposits.


Some e-books for exploration geophysicists

Posted by on Saturday, 3 September, 2011


2D seismic programme in Nova Scotia

Posted by on Thursday, 1 September, 2011

Canadian-based Forent Energy has completed a 65 km 2D seismic programme in Nova Scotia and hopes it will lead to being the first company to produce hydrocarbons onshore in Nova Scotia.

The seismic acquisition programme was completed on Forent’s Alton Block, near Cloverdale. The permitting for the programme was initiated in late April with the drilling and recording of data in July. Total cost of the programme was under $1.1 million, well within the budget estimate.

The company plans to spend upwards of $5 million in 2011 on the Alton Block in an effort to discover and produce hydrocarbons from the Gays River reef structures identified by the 2010 gravity gradiometry survey. It anticipates the start of a three well drilling programme in early October of this year, with the programme finishing by the end of November.

 


“When seismic isn’t enough”

Posted by on Saturday, 13 August, 2011

Interview with Dr. Michal Ellen Ruder, Wintermoon Geotechnologies Inc on the use of gravity and magnetic methods for Oil and Gas exploration.

1. Under what conditions will gravity methods outdo seismic? Why?

2. In what situations are gravity methods absolutely indispensable if you want results?

3. Can you describe some cases where seismic and gravity methods complement one another?

4. What techniques have you personally developed or enhanced?

5. Gravity/magnetic methods used to be used mainly to tell an explorer where to best place seismic. Nowadays you’re advocating its use as complementary and integrative to seismic as well. What has caused the shift?

6. What has been the hottest development in the past two years with respect to using grav/mag in oil and gas exploration?

The answers are here:

http://www.earthexplorer.com/news/When_seismic_isnt_enough.asp

Michal Ruder


Technology tie ups boost seismic sensing capabilities

Posted by on Sunday, 7 August, 2011

Shell and HP have announced a breakthrough in the capability of their jointly developed inertial sensing technology to shoot and record seismic data at much higher sensitivity and at ultra-low frequencies.

The new onshore wireless seismic acquisition system is designed to provide a clearer understanding of the earth’s subsurface, thus increasing prospects for discovering greater quantities of oil and gas to meet the world’s increasing energy needs.

The sensing technology has now been demonstrated to have a noise floor – a measure of the smallest detectable acceleration over a range of frequencies – of 10 nano-g per square root Hertz (ng/rtHz), which is equal to the noise created by the earth’s ocean waves at the quietest locations on earth as defined by the Peterson low noise model. The tests were conducted in the seismic testing vault at the US Geological Survey’s (USGS) Albuquerque Seismological Laboratory facility in New Mexico.

The seismic system uses the breadth of HP’s technology development capabilities as well as Shell’s advanced geophysical expertise in seismic data acquisition systems and operations. As such, this collaboration builds on the core strengths of each company to advance technology in this field.

The system will be delivered by HP Enterprise Services and the company’s IPG. It is based in part on the high-performance sensing technology originally co-developed by HP Labs – the company’s central research arm – along with IPG and Shell research in seismic network design.

Fig. 1. The survey will be flown using BlueQube technology.

http://www.engineerlive.com


Android in geophysics (this is only the beginning)

Posted by on Monday, 20 June, 2011


Open geophysics software workshop in Houston

Posted by on Monday, 20 June, 2011