AN EXPERIMENT IN SOIL GEOCHEMICAL PROSPECTING FOR PETROLEUM, DELLA GAS FIELD, COOPER BASIN

1975 ◽  
Vol 15 (1) ◽  
pp. 103
Author(s):  
S. B. Devine ◽  
H. W. Sears
Keyword(s):  
Gamma Ray ◽  
Analytical Techniques ◽  
Statistical Correlation ◽  
Gas Field ◽  
Mean Values ◽  
Gamma Ray Spectrometer ◽  
Hydrocarbon Content ◽  
Soluble Material ◽  
Cooper Basin ◽  
Propane Butane

The aim of the experiment was to test the method of prospecting for petroleum by soil geochemical analysis of hydrocarbons and, in particular, its possible application in the Cooper Basin. Some 379 samples were taken in traverses across the Della Gas Field and a nearby, undrilled anticlinal structure. The samples were taken from a depth of 5 m at a spacing of 5 per mile (approximately 1 every 300 m). Hydrocarbons were extracted with 2N HCI and analysed by gas chromatography. Some modifications to the published analytical techniques had to be made to overcome the prbblem of traces of organic compounds present in local waters and reagents.Arithmetic mean values analysed for the Della Gas Field were: acid soluble material, 8.62 per cent; ethane, 1.33 ppm; propane, 0.77 ppm; butane, 0.62 ppm; pentane, 0.84 ppm. In plots of, firstly, the sum of ethane, propane, butane and pentane and secondly that sum normalized to the amount of acid soluble material, anomalous areas containing only a few sample points occur above and near the Della Field, and the undrilled structure.There is only low statistical correlation between the amount of acid soluble material and the hydrocarbon content of the soils. The hydrocarbon content of the soils may possibly be associated with diagenetic gypsum and calcite and possibly smectite (?mixed layer clay) but the evidence is inconclusive. The soil hydrocarbon content shows some tendency to correlate with the finer grain sizes. The anomalies appear to bear no relation to the vegetation. A radiometric survey with a gamma ray spectrometer showed little variation of values and no relation to the geochemistry nor the outline of the Della Gas Field.The experiment has shown that significant variations in hydrocarbon content of the soils can be analysed in the Cooper Basin and apparent anomalous zones can be outlined. The anomalous zones may be related to the Della Gas Field.

Prediction of Reservoir Quality & Deliverability of the Tight Barik Formation in Khazzan Field, Oman

2021 ◽  
Author(s):  
Khalil Ali Al Rashdi ◽  
Martin Wells ◽  
Nigel Clark
Keyword(s):  
Gamma Ray ◽  
Analytical Techniques ◽  
Reservoir Quality ◽  
Petrographic Analysis ◽  
Well Performance ◽  
Burial History ◽  
Gas Field ◽  
Field Development ◽  
Well Production ◽  
Porosity And Permeability

Abstract The giant Khazzan gas field, located in onshore Oman, has been under development since 2013 and in production since 2017. The field is currently producing 1 billion cubic feet of gas per day from the Cambro-Ordovician Barik Formation. The 80-metre-thick paralic reservoir is 4.5 kilometers deep and has undergone complex stages of diagenesis, hydrocarbon charge and structural regime changes. Reservoir quality (RQ) is typically classed as tight (average porosity 6 porosity unit, average permeability 1 Milidarcy) but locally exceeds expectations given the burial history reaching up to 12 pu and 100 Milidarcy. This RQ variability and complexity makes reservoir deliverability (RD) a key uncertainty impacting the field development scheme and ultimately the projected economics. This study aims to create and test hypotheses of RQ and RD controls to reduce uncertainty in production and increase reservoir development efficiency. In order to better understand the key controls on reservoir quality, an extensive set of core, petrophysical log analysis and production data were integrated with field-wide seismic and outcrop data to update the Barik stratigraphic, structural and depositional frameworks. Extensive analytical techniques, including reservoir quality modelling, petrographic analysis, X-ray diffraction, mercury injection capillary pressure and minipermeameter data were also integrated. Quartz cementation and compaction are the principal degrading controls on reservoir quality. The controls on quartz cementation are complex and variably inter-related, although in general it is ductile content, proximity to mudstone and feldspar content that are the best predictors of porosity and permeability when convolved. Minipermeameter data confirms that distance to mudstone, or sandstone thickness, is an important control on reservoir quality. Using normalized gamma ray log data, total and mean individual sandstone thickness were calculated for every Barik well in Khazzan and compared to well dynamic behavior which demonstrated a positive correlation. Areas with high mean individual sandstone thickness and total sandstone thickness frequently equate with relatively high IP30s (average well production at 1100 psi well head pressure for 30 days). In contrast, areas with high total sandstone thickness, but low mean individual sandstone thickness may only have moderate IP30s as those sandstones may be more quartz cemented. Reservoir deliverability risk maps based on total and mean individual sandstone thickness and IP30 were constructed. These maps give insight into regions of poor and good gas deliverability and have identified areas that may be untested or undeveloped that may have potential upside. The resultant reservoir deliverability understanding of the Barik formation is consistent with depositional environment, diagenetic understanding and well performance. It is a good example of integrating diverse static and dynamic data to improve reservoir understanding and has direct business impact.

Elemental analysis of medicinal plants from different sites by instrumental neutron activation analysis

2016 ◽  
Vol 5 (03) ◽  
pp. 4892 ◽  
Author(s):  
Ratna Raju M.* ◽  
Madhusudhana Rao P. V. ◽  
Seshi Reddy T. ◽  
Raju M. K. ◽  
Brahmaji Rao J. S. ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Medicinal Plants ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Elemental Content ◽  
Soil Composition ◽  
Gamma Ray Spectrometer ◽  
Instrumental Neutron Activation

A study was undertaken to evaluate the inorganic elements for humans in two Indian medicinal plants leaves, namely Sphaeranthus indicus, and Cassia fistula by Instrumental Neutron Activation Analysis (INAA). INAA experiment was performed by using 20 kW KAMINI Reactor at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam. The emitted gamma rays were measured using gamma ray spectrometer. The concentrations of Al, Br, Ca, Fe, K, La, Mg, Mn, Na, Sc, V and Zn were determined in the selected medicinal plants. The medicinal leaves are using in treatment of various important ailments. The elemental content in selected medicinal leaves is various proportions depending on the soil composition, location of plant specimen and the climate in which the plant grows.

Real-time signal processing in field programmable gate array based digital gamma-ray spectrometer

2020 ◽  
Vol 91 (10) ◽  
pp. 104707
Author(s):  
Yinyu Liu ◽  
Hao Xiong ◽  
Chunhui Dong ◽  
Chaoyang Zhao ◽  
Quanfeng Zhou ◽  
...  
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Field Programmable Gate Array ◽  
Gamma Ray ◽  
Time Signal ◽  
Gamma Ray Spectrometer ◽  
Field Programmable ◽  
Gate Array ◽  
Real Time Signal Processing

scholarly journals A new tangential gamma-ray spectrometer for fast ion measurements in deuterium and deuterium–tritium plasmas of the Joint European Torus

2021 ◽  
Vol 92 (4) ◽  
pp. 043537
Author(s):  
M. Nocente ◽  
T. Craciunescu ◽  
G. Gorini ◽  
V. Kiptily ◽  
M. Tardocchi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Spectrometer ◽  
Fast Ion

A Wide Range Ge Gamma-Ray Spectrometer for on-Line Measurements of Reactor Cooling Water Activity

1977 ◽  
Vol 24 (1) ◽  
pp. 673-677 ◽  
Author(s):  
J. J. Lipsett ◽  
I. L. Fowler ◽  
R. J. Dinger ◽  
H. L. Malm
Keyword(s):  
Water Activity ◽  
Gamma Ray ◽  
Cooling Water ◽  
Gamma Ray Spectrometer ◽  
Wide Range ◽  
On Line

Natural radioactivity in some building materials and assessment of the associated radiation hazards

2018 ◽  
Vol 106 (1) ◽  
pp. 79-86
Author(s):  
Amira Kasumović ◽  
Ema Hankić ◽  
Amela Kasić ◽  
Feriz Adrović
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Absorbed Dose ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Radiation Hazards ◽  
Eu Member States ◽  
Gamma Ray Spectrometer ◽  
Radioactive Nuclides ◽  
Specific Activities

AbstractThe results of the specific activities of232Th,226Ra and40K measured in samples of commonly used building materials in Bosnia and Herzegovina are presented. Measurements were performed by gamma-ray spectrometer with coaxial HPGe detector. The surface radon exhalation and mass exhalation rates for selected building materials were also measured. The determined values of specific activities were in range from 3.16±0.81 Bq kg−1to 64.79±6.16 Bq kg−1for232Th, from 2.46±0.95 Bq kg−1to 53.89 ±3.67 Bq kg−1for226Ra and from 28.44±7.28 Bq kg−1to 557.30±93.38 Bq kg−1for40K. The radium equivalent activity, the activity concentration index, the external and internal hazard indices as well as the absorbed dose rate in indoor air and the corresponding annual effective dose, due to gamma-ray emission from the radioactive nuclides in the building material, were evaluated in order to assess the radiation hazards for people. The measured specific activities of the natural radioactive nuclides in all investigated building materials were compared with the published results for building materials from other European countries. It can be noted that the results from this study are similar to the data for building materials from neighbouring countries and for building materials used in the EU Member States. The radiological hazard parameters of the building materials were all within the recommended limits for safety use.

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