Effect of Water Saturation History on the Strength of Low-Porosity Rocks

2009 ◽  
pp. 4-4-17 ◽  
Author(s):  
G Ballivy ◽  
B Ladanyi ◽  
DE Gill
Keyword(s):  
Water Saturation ◽  
Effect Of Water ◽  
Low Porosity ◽  
Saturation History

scholarly journals Effect of Partial Water Saturation on Attenuation Characteristics of Low Porosity Rocks

2010 ◽  
Vol 44 (2) ◽  
pp. 245-251 ◽  
Author(s):  
Tae-Min Oh ◽  
Tae-Hyuk Kwon ◽  
Gye-Chun Cho
Keyword(s):  
Water Saturation ◽  
Attenuation Characteristics ◽  
Partial Water ◽  
Low Porosity

Application of logging-while-drilling spectroscopy to evaluate volume of clay, grain density, and porosity in a low porosity, high temperature environment—offshore Western Australia

2014 ◽  
Vol 54 (2) ◽  
pp. 533
Author(s):  
Paolo Bartelucci ◽  
Mauro Firinu ◽  
Anthony Jones ◽  
Ping Yan
Keyword(s):  
High Temperature ◽  
Gamma Ray ◽  
Water Saturation ◽  
Dry Weight ◽  
Core Data ◽  
Low Salinity ◽  
Petrophysical Model ◽  
Logging While Drilling ◽  
Calcium Iron ◽  
Low Porosity

Formation evaluation in low porosity, low salinity, and high temperature reservoirs poses many challenges. The environment is hostile to many logging tools due to their temperature limits and there is greater uncertainty related to petrophysical parameters compared with conventional formations. Additionally, in low porosity and low salinity reservoirs, resistivity contrast between hydrocarbon and water filled rocks is often missing. This extended abstract presents a case study from offshore WA where a petrophysical model has been created with logging while drilling measurements including spectroscopy data to improve estimation of mineralogy, clay volume and porosity, thereby reducing saturation evaluation uncertainty. Spectroscopy measurements can be analysed to derive dry weight elemental concentrations of various elements such as silicon, calcium, iron, and sulfur. These concentrations have been subsequently used as input to compute a multi-mineral petrophysical model using a least squares inversion technique. We demonstrate that spectroscopy can be used independently to obtain an accurate volume of clay instead of gamma ray, spontaneous potential, or porosity logs. Moreover, matrix properties such as grain density, which enhance the accuracy of porosity estimation derived from bulk density, are also derived from spectroscopy dataset. Good agreement with core validates the petrophysical model. Also demonstrated is how the petrophysical model reduces the uncertainty in clay volume and porosity, from which more accurate water saturation can be derived in these tight reservoirs. Calibrating the spectroscopy information to core data allows the mineralogical and geological model to be extended to the intervals where core data are not available.

scholarly journals Effect of Water Saturation on H2 and CO Solubility in Hydrocarbons

2019 ◽  
Vol 3 (1) ◽  
pp. 21
Author(s):  
Omar M. Basha
Keyword(s):  
Equation Of State ◽  
High Temperatures ◽  
Water Solubility ◽  
Water Saturation ◽  
Bubble Column ◽  
Fischer Tropsch ◽  
Effect Of Water ◽  
Bubble Column Reactors ◽  
Generalized Correlation ◽  
Wagner Equation

The effect of water on the solubility of syngas in hydrocarbons has typically been ignored when developing models for Fischer-Tropsch slurry bubble column reactors (SBCR), despite water being a major by-product. Therefore, a generalized correlation was developed to predict water solubility in hydrocarbons at high temperatures, and was used to calculate the effect of water saturation on H2 and CO solubility in hydrocarbons using the Span Wagner equation of state. The presence of water was shown to have a much more significant effect on H2 solubility in hydrocarbons, compared to CO.

scholarly journals Effect of Water Saturation on Stress-Strain Curve of Rocks in Uniaxial Compression

2017 ◽  
Vol 133 (6) ◽  
pp. 107-115 ◽  
Author(s):  
Minami KATAOKA ◽  
Tianshu BAO ◽  
Kimihiro HASHIBA ◽  
Katsunori FUKUI
Keyword(s):  
Uniaxial Compression ◽  
Water Saturation ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Effect Of Water

Thermal conductivity estimation model considering the effect of water saturation explaining the heterogeneity of rock thermal conductivity

Geothermics ◽  
2017 ◽  
Vol 66 ◽  
pp. 1-12 ◽  
Author(s):  
Katharina Albert ◽  
Marcellus Schulze ◽  
Claudia Franz ◽  
Roland Koenigsdorff ◽  
Kai Zosseder
Keyword(s):  
Thermal Conductivity ◽  
Water Saturation ◽  
Estimation Model ◽  
Effect Of Water ◽  
Rock Thermal Conductivity
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