AN EMPIRICAL APPROACH TO THE DETERMINATION OF POROSITY, SHALE PERCENTAGE, AND PERMEABILITY OF PERMIAN SANDSTONES IN THE COOPER BASIN, SOUTH AUSTRALIA

1976 ◽  
Vol 16 (1) ◽  
pp. 111
Author(s):  
C. R. Porter
Keyword(s):  
Gamma Ray ◽  
South Australia ◽  
Core Values ◽  
Empirical Approach ◽  
Good Agreement ◽  
Cooper Basin

Because of the limited yet adequate logging program run in Cooper Basin wells, porosity has been the most difficult parameter to calculate on a zone-by-zone basis. Empirically derived porosities from a gamma-ray (GK)-sonie (Δt) cross-plot show good agreement with core values of porosity. Furthermore shale percentages calculated from these porosities are in good agreement with shale values derived from crossplot techniques involving sonic, density and neutron log response parameters. An approximation of permeability may also be derived from a further simplified chart.

scholarly journals Determination of Gamma-Ray Shielding Parameters for Concretes and Dosimeters Using MCNPX

2020 ◽  
Vol 8 (1) ◽  
pp. 73-79
Author(s):  
V. P. Singh ◽  
Huseyin Ozan Tekin
Keyword(s):  
Large Scale ◽  
Gamma Ray ◽  
Simulation Method ◽  
Radiological Protection ◽  
Simulation Tool ◽  
Alternative Method ◽  
Standard Geometry ◽  
Good Agreement

Gamma-ray shielding parameter for some concretes and dosimeters having large scale applications in radiological protection are presented using MCNPX (version 2.4.0) at different energies. The MCNPX results are compared with experimental, MCNP and XCOM data, and good agreement is being noted. Present study indicates that MCNPX simulation method is suitable and reliable simulation tool to be used as an alternative method for the investigation of gamma-ray interaction. The present geometry can be used as standard geometry for MCNPX simulation for low- as well as high-Z materials.

GEOMETRY OF RESERVOIR TRENDS IN THE EPSILON FORMATION SANDS, SOUTHERN COOPER BASIN, SOUTH AUSTRALIA

1992 ◽  
Vol 32 (1) ◽  
pp. 339 ◽  
Author(s):  
W. A. Fairburn
Keyword(s):  
Gamma Ray ◽  
Facies Analysis ◽  
South Australia ◽  
Lower Permian ◽  
Isopach Maps ◽  
Continuous Sheet ◽  
Channel Deposits ◽  
Sand Bodies ◽  
Selection Of ◽  
Cooper Basin

Sandstone reservoirs within the Lower Permian Epsilon Formation, despite being gas productive in several fields in the Cooper Basin of South Australia, in particular Big Lake and Moomba, have proved to be elusive targets for exploration. This is mainly due to the distribution pattern of these sands, which differs markedly from that of the thicker and laterally extensive fluvial sands which are prevalent in the Toolachee and Patchawarra formations. As a consequence, there has been some acceptance that the distribution of Epsilon Formation reservoirs are unpredictable.Log correlation studies of the Epsilon Formation, in conjunction with sand trend mapping, have identified sands which are either laterally continuous ('sheet' sands) or laterally discontinuous ('ribbon' sands).Core facies analysis supports the interpretation that the 'sheet' sands are lake shore strandline deposits whereas the 'ribbon' sands are distributary channel deposits of prograding delta systems.Based on the inferred depositional models, and with the aid of detailed isopach maps, it has been possible to project reservoir trends of the channel sands and prepare sand maps, at varying gamma-ray cutoffs, of the shoreface sands.An understanding of the geometry of the various sand bodies has clarified the prospectivity of the Epsilon Formation and facilitated the selection of development well locations throughout the Southern Cooper Bas

scholarly journals A union neutron-gamma logging method for determination of uranium-radium disequilibrium coefficient

2020 ◽  
Vol 35 (2) ◽  
pp. 103-108
Author(s):  
Rui Chen ◽  
Cheng-Yuan Luo ◽  
Hai-Tao Wang ◽  
Zhi-Feng Liu ◽  
Xiong-Jie Zhang ◽  
...  
Keyword(s):  
Count Rate ◽  
Gamma Ray ◽  
Uranium Content ◽  
Fission Neutron ◽  
Characteristic Peak ◽  
Prompt Fission ◽  
Logging Tool ◽  
Peak Count ◽  
Good Agreement

Owing to the influence of continuous running of ground water, the uranium atoms can be separated physically from their daughters for the reason of different solubilities and the uranium deposit often shows the disequilibrium feature between uranium and its daughter products (radium principally). It is important, when spectral gamma ray logging, to quantify the uranium content which can cause inaccuracy of the result. This paper, based on spectral ? ray logging method, proposes a neutron-gamma logging method to determine the coefficient of uranium-radium disequilibrium. In this method, characteristic peak count rate of uranium is taken from prompt fission neutron logging, whereas characteristic peak count rate of radium, thorium and potassium are taken from spectral gamma ray logging. Based on this method, the union logging tool including epithermal neutron, thermal neutron, and gamma detector along with D-T generator, have been developed. The experimental results, in standard model wells, show that this method is in good agreement within 7% in core assay results. It shows that the union neutron-? logging method can be used for field uranium logging jobs.

scholarly journals Theoretical and experimental determination of mass attenuation coefficients of lead-based ceramics and their comparison with simulation

2016 ◽  
Vol 31 (2) ◽  
pp. 142-149 ◽  
Author(s):  
Alireza Vejdani-Noghreiyan ◽  
Elham Aliakbari ◽  
Atiyeh Ebrahimi-Khankook ◽  
Mahdi Ghasemifard
Keyword(s):  
Gamma Ray ◽  
Mass Attenuation Coefficient ◽  
X Ray Diffraction ◽  
Attenuation Coefficients ◽  
X Ray ◽  
Simulation Results ◽  
Theoretical Results ◽  
Good Agreement ◽  
Mass Attenuation

Mass attenuation coefficient of lead-based ceramics have been measured by experimental methods and compared with theoretical and Monte Carlo simulation results. Lead-based ceramics were prepared using mixed oxide method and the X-ray diffraction analysis was done to evaluate the crystal structure of the produced handmade ceramics. The experimental results show good agreement with theoretical and simulation results. However at two gamma ray energies, small differences between experimental and theoretical results have been observed. By adding other additives to ceramics and observing the changes in the shielding properties such as flexibility, one can synthesize and optimize ceramics as a neutron shield.

Enrichment analysis of uranium in uranium oxide by gamma-ray spectrometry without using calibration standards

2000 ◽  
Vol 88 (2) ◽  
Author(s):  
Y. Nir-El
Keyword(s):  
Gamma Rays ◽  
Uranium Oxide ◽  
Gamma Ray ◽  
Enrichment Analysis ◽  
Gamma Ray Spectrometry ◽  
Uranium Enrichment ◽  
Calibration Standards ◽  
Certified Values ◽  
Good Agreement

An analytical method for the determination of uranium enrichment in uranium oxide without using any calibration standards is described. Very good agreement between the measured and certified values was obtained in the analysis of a Standard Reference Material. Precise energies and emission probabilities were derived for two weak gamma-rays of

COMPARATIVE ACTION OF VARIOUS OESTROGENIC COMPOUNDS ON MOUSE VAGINAL SIALIC ACIDS (II)

1969 ◽  
Vol 62 (4) ◽  
pp. 663-670 ◽  
Author(s):  
Lars Carlborg
Keyword(s):  
Sialic Acid ◽  
Response Curve ◽  
Sialic Acids ◽  
Clear Cut ◽  
Suitable Parameter ◽  
Sufficient Degree ◽  
Comparative Action ◽  
Relative Potencies ◽  
Good Agreement

ABSTRACT Oestrogens administered in lower doses than necessary to induce full cornification of the mouse vagina induce mucification. It was shown previously that the degree of mucification could be estimated by quantitative determination of sialic acids. A suitable parameter for oestrogen assay was the measurement of vaginal sialic acid concentration which exhibited a clear cut dose response curve. Eleven assays of various oestrogens were performed with this method. Their estimated relative potencies were in good agreement with other routine oestrogen assays. A statistically sufficient degree of precision was found. The sensitivity was of the same order, or slightly higher, than the Allen-Doisy test.

An Automated Method for the Determination of Serum Calcium with Glyoxal Bis (2-Hydroxyanil)

1967 ◽  
Vol 13 (6) ◽  
pp. 515-520 ◽  
Author(s):  
Genevieve Farese ◽  
Janice L Schmidt ◽  
Milton Mager
Keyword(s):  
Serum Calcium ◽  
Automated Analysis ◽  
Automated Method ◽  
Good Agreement

Abstract A completely automated analysis is described for the determination of serum calcium with glyoxal bis (2-hydroxyanil) solution (GBHA). The method is simple and precise, and the data obtained are in good agreement with results obtained by the manual GBHA procedure.

Sign in / Sign up

Export Citation Format

Share Document