scholarly journals A new technique for obtaining high-resolution pore pressure records in thick claystone aquitards and its use to determine in situ compressibility

2013 ◽  
Vol 49 (2) ◽  
pp. 732-743 ◽  
Author(s):  
Laura A. Smith ◽  
Garth van der Kamp ◽  
M. Jim Hendry
Keyword(s):  
High Resolution ◽  
Pore Pressure ◽  
New Technique ◽  
A New Technique

A new technique for in-situ measurements of bubble characteristics in bubble columns operated in the heterogeneous regime

2016 ◽  
Vol 155 ◽  
pp. 504-523 ◽  
Author(s):  
P. Maximiano Raimundo ◽  
A. Cartellier ◽  
D. Beneventi ◽  
A. Forret ◽  
F. Augier
Keyword(s):  
In Situ Measurements ◽  
Bubble Columns ◽  
New Technique ◽  
A New Technique ◽  
Bubble Characteristics

Analog Morphocorrelation: A New Technique with Implications for High-Resolution Stratigraphy

Palaios ◽  
1986 ◽  
Vol 1 (2) ◽  
pp. 183 ◽  
Author(s):  
William C. Parker ◽  
Anthony J. Arnold ◽  
William A. Berggren
Keyword(s):  
High Resolution ◽  
New Technique ◽  
A New Technique

In Situ NMRObservations of the Photolysis of Cymantrene and Methylcymantrene in Supercritical Fluids:  A New Technique Using High-Pressure NMR

1997 ◽  
Vol 119 (42) ◽  
pp. 10170-10177 ◽  
Author(s):  
John C. Linehan ◽  
Scott L. Wallen ◽  
Clement R. Yonker ◽  
Thomas E. Bitterwolf ◽  
J. Timothy Bays
Keyword(s):  
High Pressure ◽  
Supercritical Fluids ◽  
New Technique ◽  
A New Technique

Seismic monitoring of a CO2 flood in a carbonate reservoir: A rock physics study

Geophysics ◽  
1998 ◽  
Vol 63 (5) ◽  
pp. 1604-1617 ◽  
Author(s):  
Zhijing Wang ◽  
Michael E. Cates ◽  
Robert T. Langan
Keyword(s):  
High Resolution ◽  
Pore Pressure ◽  
Rock Physics ◽  
Fluid Substitution ◽  
High Porosity ◽  
High Permeability ◽  
Pressure Buildup ◽  
Reservoir Rocks ◽  
Velocity Changes

A carbon dioxide (CO2) injection pilot project is underway in Section 205 of the McElroy field, West Texas. High‐resolution crosswell seismic imaging surveys were conducted before and after CO2 flooding to monitor the CO2 flood process and map the flooded zones. The velocity changes observed by these time‐lapse surveys are typically on the order of −6%, with maximum values on the order of −10% in the vicinity of the injection well. These values generally agree with laboratory measurements if the effects of changing pore pressure are included. The observed dramatic compressional ([Formula: see text]) and shear ([Formula: see text]) velocity changes are considerably greater than we had initially predicted using the Gassmann (1951) fluid substitution analysis (Nolen‐Hoeksema et al., 1995) because we had assumed reservoir pressure would not change from survey to survey. However, the post‐CO2 reservoir pore fluid pressure was substantially higher than the original pore pressure. In addition, our original petrophysical data for dry and brine‐saturated reservoir rocks did not cover the range of pressures actually seen in the field. Therefore, we undertook a rock physics study of CO2 flooding in the laboratory, under the simulated McElroy pressures and temperature. Our results show that the combined effects of pore pressure buildup and fluid substitution caused by CO2 flooding make it petrophysically feasible to monitor the CO2 flood process and to map the flooded zones seismically. The measured data show that [Formula: see text] decreases from a minimum 3.0% to as high as 10.9%, while [Formula: see text] decreases from 3.3% to 9.5% as the reservoir rocks are flooded with CO2 under in‐situ conditions. Such [Formula: see text] and [Formula: see text] decreases, even if averaged over all the samples measured, are probably detectable by either crosswell or high‐resolution surface seismic imaging technologies. Our results show [Formula: see text] is sensitive to both the CO2 saturation and the pore pressure increase, but [Formula: see text] is particularly sensitive to the pore pressure increase. As a result, the combined [Formula: see text] and [Formula: see text] changes caused by the CO2 injection may be used, at least semiquantitatively, to separate CO2‐flooded zones with pore pressure buildup from those regions without pore pressure buildup or to separate CO2 zones from pressured‐up, non‐CO2 zones. Our laboratory results show that the largest [Formula: see text] and [Formula: see text] changes caused by CO2 injection are associated with high‐porosity, high‐permeability rocks. In other words, CO2 flooding and pore pressure buildup decrease [Formula: see text] and [Formula: see text] more in high‐porosity, high‐permeability samples. Therefore, it may be possible to delineate such high‐porosity, high‐permeability streaks seismically in situ. If the streaks are thick enough compared to seismic resolution, they can be identified by the larger [Formula: see text] or [Formula: see text] changes.

scholarly journals Suspension (S)-FISH, a New Technique for Interphase Nuclei

2002 ◽  
Vol 50 (12) ◽  
pp. 1697-1698 ◽  
Author(s):  
Ulf Steinhaeuser ◽  
Heike Starke ◽  
Angela Nietzel ◽  
Joerg Lindenau ◽  
Peter Ullmann ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Interphase Nucleus ◽  
New Technique ◽  
Interphase Nuclei ◽  
First Results ◽  
A New Technique

We describe a versatile method for performing fluorescence in situ hybridization (FISH) in suspension instead of on a slide as usually done. This so-called suspension-FISH (S-FISH) opens new possibilities for the analysis of shape and functions of the human interphase nucleus. The procedure is described and the first results using this approach are presented.

In Situ Hypothermic Perfusion with Retrograde Outflow During Right Hemihepatectomy: First Experiences with a New Technique

2014 ◽  
Vol 218 (1) ◽  
pp. e7-e16 ◽  
Author(s):  
Megan J. Reiniers ◽  
Rowan F. van Golen ◽  
Michal Heger ◽  
Banafsche Mearadji ◽  
Roelof J. Bennink ◽  
...  
Keyword(s):  
New Technique ◽  
Right Hemihepatectomy ◽  
Hypothermic Perfusion ◽  
A New Technique

A subarachnoid screw for monitoring intracranial pressure

1973 ◽  
Vol 39 (3) ◽  
pp. 416-419 ◽  
Author(s):  
John K. Vries ◽  
Donald P. Becker ◽  
Harold F. Young
Keyword(s):  
Intracranial Pressure ◽  
Local Anesthesia ◽  
Subarachnoid Space ◽  
New Technique ◽  
Content Type ◽  
A New Technique ◽  
Fine Print

✓ A new technique for monitoring intracranial pressure is presented. It is based on a hollow screw in the skull whose tip projects through the dura into the subarachnoid space. The screw can be easily inserted under local anesthesia. Pressure is monitored isovolumetrically by connecting the screw to a transducer. The system can be calibrated in situ and has been successfully used in 56 patients during a 6-month period.

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