Characterization of Rock Mineral and Pore Space Properties for Proper Reservoir Description and Formation Evaluation, Gulf Coast: ABSTRACT

AAPG Bulletin ◽  
1979 ◽  
Vol 63 ◽  
Author(s):  
J. W. Neasham
Keyword(s):  
Gulf Coast ◽  
Pore Space ◽  
Formation Evaluation ◽  
Rock Mineral ◽  
Reservoir Description

scholarly journals Genomic and Phenotypic Characterization of Vibrio cholerae Non-O1 Isolates from a US Gulf Coast Cholera Outbreak

PLoS ONE ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. e86264 ◽  
Author(s):  
Bradd J. Haley ◽  
Seon Young Choi ◽  
Christopher J. Grim ◽  
Tiffiani J. Onifade ◽  
Hediye N. Cinar ◽  
...  
Keyword(s):  
Vibrio Cholerae ◽  
Gulf Coast ◽  
Phenotypic Characterization ◽  
Cholera Outbreak

scholarly journals Characterization of prodiginine compounds produced by a Vibrio species isolated from salt flat sediment along the Florida Gulf Coast

Fine Focus ◽  
2017 ◽  
Vol 3 (1) ◽  
pp. 33-51 ◽  
Author(s):  
Stephanie Morgan ◽  
Matthew J. Thomas ◽  
Katherine M. Walstrom ◽  
Eric C. Warrick ◽  
Brittany J. Gasper
Keyword(s):  
Gulf Coast ◽  
Bacterial Species ◽  
Whole Genome ◽  
Medicinal Uses ◽  
Salt Flat ◽  
Florida Gulf Coast ◽  
Flash Column Chromatography ◽  
Vibrio Genus ◽  
Pink Pigment

Prodiginines are secondary metabolites produced by several known species of bacteria. These metabolites are known for their bright pigmentation and their potential medicinal uses. Biosynthesis of prodiginine compounds, including the well-studied prodigiosin, has been well characterized in Serratia marcescens and other bacterial species, including several marine bacteria. In an effort to isolate and identify natural products from marine organisms, an environmental sample was taken from a salt flat along the Florida Gulf Coast and cultured for bacterial growth. A bacterial species that produces a vibrant pink pigment was isolated and identified as a member of the Vibrio genus and was named MI-2. Whole genome sequencing identified a 13-gene operon with homology to the S. marcescens prodigiosin biosynthetic operon. The pigment produced by MI-2 was hypothesized to be composed of prodigiosin or related prodiginine compounds and was purified by flash column chromatography and identified by mass spectrometry.

The Effect of Capillary Condensation on the Geomechanical and Acoustic Properties of Tight Formations: An Experimental Study

2021 ◽  
Author(s):  
Aamer Albannay ◽  
Binh Bui ◽  
Daisuke Katsuki
Keyword(s):  
Pore Pressure ◽  
Capillary Condensation ◽  
Pore Space ◽  
Dew Point ◽  
Acoustic Properties ◽  
Point Pressure ◽  
Tight Formations ◽  
Dew Point Pressure ◽  
Compressional Velocity

Abstract Capillary condensation is the condensation of the gas inside nano-pore space at a pressure lower than the bulk dew point pressure as the result of multilayer adsorption due to the high capillary pressure inside the small pore throat of unconventional rocks. The condensation of liquid in nano-pore space of rock changes its mechanical and acoustic properties. Acoustic properties variation due to capillary condensation provides us a tool to monitor phase change in reservoir as a result of nano-confinement as well as mapping the area where phase change occurs as well as characterize pore size distribution. This is particularly important for tight formations where confinement has a strong effect on phase behavior that is challenging to measure experimentally. Theoretical studies have examined the effects of capillary condensation; however, these findings have not been verified experimentally. The main objective of this study is to experimentally investigate the effect of capillary condensation on the mechanical and acoustic properties of shale samples. The mechanical and acoustic characterization of the samples was carried out experimentally using a state-of-the-art tri-axial facility at the Colorado School of Mines. The experimental set-up is capable of the simultaneous acquisition of coupled stress, strain, resistivity, acoustic and flow data. Carbon dioxide was used as the pore pressure fluid in these experiments. After a comprehensive characterization of shale samples, experiments were conducted by increasing the pore pressure until condensation occurs while monitoring the mechanical and acoustic properties of the sample to quantify the effect of capillary condensation on the mechanical and acoustic properties of the sample. Experimental data show a 5% increase in Young's Modulus as condensation occurs. This increase is attributed to the increase in pore stiffness as condensation occurs reinforcing the grain contact. An initial decrease in compressional velocity was observed as pore pressure increases before condensation occurs which is attributed to the expansion of the pore volume when pore pressure increases. After this initial decrease, compressional velocity slightly increases at a pressure around 750 - 800 psi which is close to the condensation pressure. We also observed a noticeable increase in shear velocity when capillary condensation occurs, this could be due to the immobility of the condensed liquid phase at the pore throats. The changes of geomechanical and acoustic signatures were observed at around 750 - 800 psi at 27°C, which is the dew point pressure of the fluid in the nano-pore space of the sample at this temperature. While the unconfined bulk dew point pressure of carbon dioxide at the same temperature is 977 psi. Hence, this study marks the first measurement of the dew point of fluid in nano-pore space and potentially leads to the construction of the phase envelope of fluid under confinement.

Advances in low-field nuclear magnetic resonance (NMR) technologies applied for characterization of pore space inside rocks: a critical review

2020 ◽  
Vol 17 (5) ◽  
pp. 1281-1297 ◽  
Author(s):  
Jian-Chun Guo ◽  
Hang-Yu Zhou ◽  
Jie Zeng ◽  
Kun-Jie Wang ◽  
Jie Lai ◽  
...  
Keyword(s):  
Pore Space ◽  
Structure Characterization ◽  
Fluid Identification ◽  
Low Field ◽  
Signal Collection ◽  
History Of ◽  
Nmr Techniques ◽  
Future Work ◽  
Result Interpretation

Abstract NMR serves as an important technique for probing rock pore space, such as pore structure characterization, fluid identification, and petrophysical property testing, due to the reusability of cores, convenience in sample processing, and time efficiency in laboratory tests. In practice, NMR signal collection is normally achieved through polarized nuclei relaxation which releases crucial relaxation messages for result interpretation. The impetus of this work is to help engineers and researchers with petroleum background obtain new insights into NMR principals and extend existing methodologies for characterization of unconventional formations. This article first gives a brief description of the development history of relaxation theories and models for porous media. Then, the widely used NMR techniques for characterizing petrophysical properties and pore structures are presented. Meanwhile, limitations and deficiencies of them are summarized. Finally, future work on improving these insufficiencies and approaches of enhancement applicability for NMR technologies are discussed.

FORMATION EVALUATION IN HIGHLY-DEVIATED, LONG REACH DEVELOPMENT WELLS ON THE NORTH RANKIN GAS FIELD, NW SHELF, AUSTRALIA

1990 ◽  
Vol 30 (1) ◽  
pp. 310
Author(s):  
D. Lasserre
Keyword(s):  
Drilling Fluid ◽  
Drill Pipe ◽  
Vertical Resolution ◽  
Gas Field ◽  
Log Data ◽  
Formation Evaluation ◽  
North West ◽  
The North ◽  
Reservoir Description ◽  
Resistivity Log

A large proportion of the North West Shelf development gas wells are long reach (greater than 3500 m) and highly deviated. For reservoir description and management purposes, comprehensive formation evaluation needs to be carried out in these wells.Considerable difficulties have been encountered with electric log data acquisition due to friction and borehole conditions in these long, highly-deviated wells. As a result, new techniques to log the zones of interest were introduced. A system using the drill pipe to transport the downhole logging tools has been successfully used.Also, low-toxicity oil-based mud (LTM) was introduced in order to ease drilling problems and borehole conditions. However, owing to the non-conductive nature of the oil-based drilling fluid, improvements were required in the vertical resolution of the resistivity measurements and the estimation of the formation porosity.A computer program using a forward deconvolution technique recently developed by Shell's research laboratory in Holland has been successfully applied to enhance the vertical resolution of the resistivity log reading.The large range of uncertainty on the pore volume has been reduced to reasonable level by calibrating the porosity log data against core data obtained in a well drilled with LTM.

Characterization of Chemically Modified Pore Surfaces by Small Angle Neutron Scattering

1989 ◽  
Vol 166 ◽  
Author(s):  
C. J. Glinka ◽  
L. C. Sandert ◽  
S. A. Wiset ◽  
N. F. Berk
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Pore Space ◽  
Silica Particles ◽  
Microporous Silica ◽  
Hydrocarbon Chains ◽  
Phase Liquid ◽  
Internal Pore

ABSTRACTSmall angle neutron scattering has been used to characterize the structure of linear hydrocarbon chains chemically grafted to the internal pore surfaces of microporous silica particles. The aim of this work has been to relate the structure of the bonded adsorbate layers in these particles to their performance in, for example, reverse-phase liquid chromatography. By filling the pore space in the modified silica with a solution that matches the scattering density of the silica framework, the scattering from the adsorbate layers is enhanced and provides a sensitive probe of the effective thickness, uniformity and degree of solvent penetration in the layers. Results are presented for both monomeric and polymeric phases of alkyl chains ranging from C8 to C30 bonded to silica particles with a mean pore size of 100 nm.

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