Introduction to this special section: CO2 in the subsurface

2020 ◽  
Vol 39 (1) ◽  
pp. 15-15
Author(s):  
Vanessa Nunez-Lopez ◽  
Laura Chiaramonte ◽  
Kyle T. Spikes

The topic of carbon dioxide (CO2) in the subsurface relates to enhanced recovery efforts and the fate of CO2 in injection and sequestration scenarios. The papers in this special section address those situations from the perspectives of formation evaluation, injection practices, and time-lapse monitoring. The fields under study in these papers all drastically differ from one another in geologic complexity, so no standard workflow suffices to characterize all of them. These papers paint a good picture of the range of issues associated with the understanding of CO2 in the subsurface.

2020 ◽  
Vol 39 (7) ◽  
pp. 462-463
Author(s):  
David H. Johnston

The papers submitted to this special section demonstrate that the topic of reservoir monitoring is extremely diverse. This diversity is reflected in the wide range of geologic settings covered by these papers — deepwater unconsolidated clastics, more cemented sandstones in onshore fields, and carbonates. Diversity is seen in the range of production scenarios described by these papers — water sweep of oil and gas, thermal recovery using steam-assisted gravity drainage (SAGD), and enhanced recovery using CO2 injection. Moreover, the papers in this section cover much more than time-lapse 3D seismic. Although about half of the submitted papers use 4D surface seismic data to monitor reservoirs, the remainder cover a diversity of methods that include time-lapse vertical seismic profiles (VSPs), repeat well logging using distributed acoustic sensing (DAS), and muon tomography. Even the concept of the “reservoir” is expanded to include monitoring microseismicity that might result from production activity.


2004 ◽  
Vol 19 (03) ◽  
pp. 133-138 ◽  
Author(s):  
Hendrik Rohler ◽  
Ted Bornemann ◽  
Alexis Darquin ◽  
John Rasmus

2007 ◽  
Vol 1 (4) ◽  
pp. 456-472 ◽  
Author(s):  
Nadja Müller ◽  
T.S. Ramakrishnan ◽  
Austin Boyd ◽  
Shinichi Sakruai

2019 ◽  
Vol 7 (4) ◽  
pp. T751-T759
Author(s):  
Killian Ikwuakor

Velocity is an important rock property that is required and used in different applications in petrophysics, rock physics, and seismic. The published literature shows a plethora of equations and models that relate velocity and porosity, a critical reservoir property. Attempts to account for the presence of shale in the formation invariably lead to more complicated relations. The inability of the industry to streamline these relations handicaps advancements in rock physics and formation evaluation, complicates the application of best practices in time-lapse seismic and fluid substitutions, and jeopardizes the integration of petrophysical, geologic, and seismic characteristics of oil and gas reservoirs. I have considered the following criteria to grade some of the different velocity-porosity relations in use today: (1) the significance of effective stress, (2) usefulness for interpreting geology, (3) predictive capability, and (4) universal applicability. Judging by these criteria, the general linear form, first prescribed by the late George R. Pickett, is the clear winner. The general linear form is a linear relationship between the reciprocal velocity and porosity. It passes theoretical and empirical justification. It is also valid for P- and S-wave velocities, yields easily to mathematical manipulation, and satisfies carbonate as well as clastic rocks for porosities encountered in everyday subsurface investigations. I evaluate practical examples in which the general linear form is the basis for multiple rock-typing criteria, comparative formation evaluation, and interpretive use of the [Formula: see text] ratio. Appropriate integration of the general linear form with other rock property relations provides avenues to redefine the [Formula: see text] ratio and acoustic impedance, and it expands the understanding and applications of reservoir elastic properties, as well as it constrains and streamlines rock physics models and applications.


2020 ◽  
Vol 34 (12) ◽  
pp. 16089-16098 ◽  
Author(s):  
Saad Alafnan ◽  
Yusuf Falola ◽  
Osamah Al Mansour ◽  
Khalid AlSamadony ◽  
Abeeb Awotunde ◽  
...  

1998 ◽  
Vol 17 (10) ◽  
pp. 1386-1386 ◽  
Author(s):  
Gene Sparkman
Keyword(s):  

2020 ◽  
Vol 39 (1) ◽  
pp. 6-7
Author(s):  
Maria Angela Capello

I look forward to New Year's resolutions. They challenge me to shape the year ahead, hopefully as a better one than the last. For 2020, I included in my list specific step changes to reduce my own carbon footprint, and there is no better opportunity to discuss this than in the current issue of The Leading Edge, with its special section dedicated to carbon dioxide (CO2).


2019 ◽  
Vol 38 (1) ◽  
pp. 12-12
Author(s):  
Martin A. Abraham

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