Articles

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October 2016

Integrating Data – How Geophysicists and Engineers Can Work Together to Improve Hydraulic Fracturing

Dr. Jennifer L. Miskimins

The integration of disciplines and data is often discussed, occasionally implemented, and rarely as successful as it can or should be. However, failure to accomplish such integration often leads to development missteps and reserves left in the ground. Hydraulic fracturing is one of those areas where multidisciplinary integration is not…

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October 2016

Introduction to October Focus: CREWES Research

Kristopher Innanen

This issue of the RECORDER features contributions from four senior graduate students working with the research group CREWES in the Department of Geoscience at the University of Calgary. These researchers present short summaries of their recent progress towards a better understanding of how seismic waves interact with geological structures, and…

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October 2016

What Should Multicomponent Near-Surface Corrections Look Like in a World of Waveforms?: A raypath-consistent solution for converted-wave processing

Raul Cova, David Henley, Xiucheng Wei and Kristopher A. Innanen

Removal of near-surface effects from elastic data, particularly converted waves, is a well-known and difficult problem, whose difficulty only increases on the backdrop of the trend in our field towards treating seismic wiggles as full waveforms. If we want to eventually apply some type of full waveform inversion or fitting,…

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October 2016

Interbed Multiple Prediction on Land: Which Technology, and Which Domain?

Jian Sun and Kristopher A. Innanen

Prediction and removal of internal or interbed multiples is an increasingly high priority problem in seismic data analysis. One reason for the growth of its role and importance comes from the increased sensitivity with which primary amplitudes in quantitative interpretation are now analyzed. But the importance of accurate and robust…

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October 2016

Reflections from Contrasts in Isotropic Attenuative Media AVO and Beyond

Shahpoor Moradi and Kristopher A. Innanen

The purpose of this article is to summarize and illustrate some features of new theory describing the interaction of seismic waves with viscoelastic structures and interfaces. Progress in these areas makes available more sophisticated tools for AVO analysis and inversion, and thereby quantitative interpretation, and for multi parameter full waveform…

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October 2016

A Summary of Several Challenges Facing Multi-Parameter Elastic Full Waveform Inversion

Wenyong Pan and Kristopher A. Innanen

In spite of all that there is still to learn about seismic full waveform inversion (FWI), and there is a lot, the technology has accumulated some significant success stories in recent years – enough to motivate researchers to think quite ambitiously about how far we might go with it. Moreover,…

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October 2016

Mental Casualties of a Down-turned Market

Amanda Knowles

Aaron sighed, “I lost my job in December and I can’t find anything else.” His statement hung in the air for what seemed like an eternity. I struggled to find the right words to say. How could I help? What could I possibly do? My company wasn’t hiring and I…

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October 2016

Support Services Available for Those Facing Mental Health Challenges

Rob Holt

In any given year, at least one in five people in Canada experience a mental health problem or illness, and most of us know someone who has faced a mental health challenge or concern. Mental illness does not discriminate based on age, gender, religion or race. Mental illness can be…

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September 2016

Introduction to September Focus: Innovation in Land Seismic

Allan R Châtenay and Paul Thacker

Throughout the history of reflection seismic data acquisition there has been a continuous increase in the acquired field trace density as new acquisition and processing technologies have emerged. As a consequence, the E&P industry has seen consistent improvements in final seismic data quality. In this month’s RECORDER Focus section, we…

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September 2016

Deriving High Quality Horizontal Positioning of Seismic Receivers Directly from GPS Receivers Embedded in Wireless Seismic Receiver Nodes

Allan R Châtenay and Paul Thacker

Our work demonstrates that positional data derived from the GPS receivers embedded in wireless seismic receiver nodes can achieve horizontal positioning quality which complies with the minimum standard required for most land-based seismic data acquisition operations. While the original purpose of the GPS receivers within seismic receiver nodes was to…

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September 2016

Technology Collaboration is the Key Element in Frontier Seismic Exploration

Jason Criss

Seismic exploration has long been done in remote, out of the way regions of the globe. However, a definition for frontier area is not a region which is necessarily remote but one that has had limited exploration. This can mean anything from distant jungles to Arctic forests, but a common…

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September 2016

Field Testing Justifying Significant Changes in 3D Design Parameters to Improve Seismic Data and Decrease Costs

Ann O’Byrne, Greg MacNeil and Andrew Kura

Challenging the status quo to optimize 3D acquisition has been a focus of the Foster Creek team since late 2014 when Cenovus initiated a pilot project to decrease the cost of acquiring 3D seismic data. The challenge was to decrease acquisition costs while maintaining data quality and safety standards.

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September 2016

It’s Time to Wake Up!

Doug Pruden

I want to proclaim to the Canadian oil industry that the pity party is now officially over and it is time to get up and get back to work.

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September 2016

How Geophysics Can Generate and Demonstrate More Value During the Development of Mature Unconventional Resource Plays: A Personal Opinion

Rob Holt

The discovery in the early 1990s by George Mitchell and his team at Mitchell Energy of how to profitably exploit the Barnett Shale play fuelled the North American unconventionals revolution, aided by (1) oil and gas price increases; (2) improvements in drilling and completions technologies; (3) readily available capital and…

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June 2016

Improving Seismic Data While Decreasing Costs

Ann O’Byrne

In the latter half of 2013 Cenovus initiated a pilot to decrease the cost of acquiring 3D seismic data while maintaining data quality and safety standards. Monitor 4D’s frequently made use of Vibroseis as an infill. Earlier testing indicated that Vibroseis acquisition could replace future baseline surveys; however investigation and…

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June 2016

Introduction to June Focus: DAS/Borehole Geophysics

Paul Webster

Welcome to this special edition of the RECORDER with a focus on Distributed Acoustic Sensing (DAS) and borehole geophysics. There are four papers on DAS, in particular with application to Vertical Seismic Profiles (VSPs) and one on DAS for microseismic. Since DAS was first used as a downhole optic sensing…

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June 2016

The use of fiber-optic sensing to efficiently acquire vertical seismic profiles

Tim Dean, Theo Cuny, and Arthur Hartog

Conventional vertical seismic profiles (VSPs) are recorded by lowering receivers, usually geophones but increasingly accelerometers, contained within shuttles down a well where they are anchored to the borehole wall using clamps or bowsprings. A seismic source (often located adjacent to the well-head, i.e. at zero-offset) is then activated and data…

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June 2016

Comparing DAS and Geophone Zero-Offset VSP Data Sets Side-By-Side

Mark E. Willis, Cemal Erdemir, Andreas Ellmauthaler, Oscar Barrios, David Barfoot

Zero-offset vertical seismic profile (VSP) data were acquired by both retrievable (wireline) geophones and distributed acoustic sensing (DAS) on cemented-in fiber-optic cable. Side-by-side comparisons of these data sets are shown at several steps in the processing flow to help understand the advantages of each of these data types. Good data…

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June 2016

Simultaneous Acquisition of Distributed Acoustic Sensing VSP with Multi-mode and Single-mode Fiber-optic Cables and 3C-Geophones at the Aquistore CO2 Storage Site

D. E. Miller, T.M. Daley, D. White, B.M. Freifeld, M. Robertson, J. Cocker, M. Craven

A dynamite 3D VSP survey, a Vibrator 2D VSP survey and related calibration surveys at the Aquistore CO2 storage site in Saskatchewan served as a technology test for distributed acoustic sensing (DAS). DAS data was acquired as a vertical seismic profile (VSP) on two codeployed fibers, one single-mode (SM) and one…

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June 2016

Field trials of distributed acoustic sensing for reservoir delineation with VSP

Ge Zhan, Qingsong Li, Jay Nahm, Jan Kommedal and Jon Konkler

A most recent fiber-optic based technology that has been adopted in VSP acquisition is distributed acoustic sensing (DAS), where the fiber-optic cable in the well is the sensor and a typical seismic source is shooting on the surface into the reservoir formation. This technology enables a fiber-optic cable to be…